NEW APPROACHES TO DATA COLLECTION, DATA PROCESSING

AND DATA DISSEMINATION (IASPEI, IAGA, IAHS, IAG, IAPSO,

SCOSTEP)

Location: Medical School EG12 LT4

Location of Poster: Arthur Thompson Hall

Tuesday 27 July AM

Presiding Chair: D C Herzog (US Geological Survey, Denver Federal Center, Denver, USA)

JWS33/W/29-B2 0930

THE VIRTUAL WORLD DATA CENTER SYSTEM.

Yu.TYUPKIN (Geophysical Center, Joint Institute of Physics of the Earth, Molodezhnaya 3, Moscow 117296, Russia, tyupkin@wdcb.rssi.ru)

The World Data Center system (WDC system) was established in 1957 to serve the International Geophysical Year (IGY) program. Two complex centers were established by USA (WDC A) and USSA (WDC B). These centers realized functions of data acquisition, storage and distribution of most IGY disciplines. In many disciplines there was a special centers known as WDC C1 if in Western Europe and WDC C2 if in Asia or Australia in addition to complex centers. Multiple centers were deemed advisable to guard against catastrophic loss of data, and for the convenience of data providers and users. Because of its success, the WDC system was made permanent and used for post IGY data. Today the WDC system is healthy and available. But new technology of data storage, data access and data processing require new approach to realization of main functions of the WDC system. The conception of Virtual World Data System (VWDCS) is discussed. VWDCS is a distributed automated system on the INTERNET basis. The VWDCS resource is built up by various systematized and reliable information on geosciences that can be reached through Internet and has the main WWW page with the fields filled according to the VWDCS standard. The VWDCS management system must realized functions: 1. The procedure of presentation of a new information resource by the author. 2. The access to Internet informational resources not included in VWDCS. 3. Automatic revision of the informational resources of the VWDCS network. 4. The specific features of work in countries with limited access to Internet. The now existing WDCs should carry out at least three functions in the frame of the VWDC System: - Long-term storage of information. - Provision of means for maintaining control over the quality of information available in VWDCS. - 3. Maintenance and co-ordination of connections with new informational resources on national (WDC A, WDC B, WDC D) and regional (WDC C) levels.

JWS33/W/10-B2 0945

WEB EFFECTS: FRONTIERS IN INFORMATION DELIVERY

Allen M. HITTELMAN and Susan J. McLean (NOAA's National Geophysical Data Center, World Data Center for Solid Earth Geophysics, 325 Broadway, Boulder, CO 80303, U. S. A., email: ahittelman@ngdc.noaa.gov)

Without question, one of the most profound impacts on information technology is the advent of the Web. In just a few years, this media has drastically altered our perceptions of information services and created new paradigms for data dissemination. To cope with this unprecedented explosion of change, many of us in the information service business had to re-evaluate organizational goals and objectives. Where once we felt comfortable with our awareness of user needs, now we fell distant due to the impersonal nature of our Web sites (which seem to serve 99% of our scientific clientele's needs).

The National Geophysical Data Center, and its several supported World Data Centers, has pioneered many new innovative methods that enrich data and information delivery on the Web. Examples of these techniques include: the interactive creation of graphical spreadsheets (see http://swat.ngdc.noaa.gov/cgi-bin/wist/wist.pl), the satellite browse, display and download features of the Space Physics Interactive Data Resource (SPIDR, see http://julius.ngdc.noaa.gov:8080/) and access to gridded relief models (see http://www.ngdc.noaa.gov/seg/topo/globe.shtml). Newer techniques are empowering users with the ability to access data and meta-data through GIS-enabled Web servers. We have also explored data mining tools to provide improved understandings of the needs of our Web users -- from where do they come and for what do they search?

JWS33/W/11-B2 1000

NEW DIRECTIONS IN NASA EARTH SCIENCE ENTERPRISE DATA MANAGEMENT: PLANS FOR A NEW DATA INFORMATION SYSTEMS AND SERVICES APPROACH (NEW DISS)

Ronald L. S. WEAVER, (National Snow and Ice Data Center, CIRES, Campus Box 449, University of Colorado Boulder, Colorado, 80309)

The NEW DISS effort of the NASA Earth Sciences Enterprise (ESE) has now completed its preliminary report on how to implement data management within the agency in the coming 5-7 year timeframe. The key elements of this plan include more investigator involvement in data management and emphasis on more de-centralized data management services. Design concepts include a modular approach to data system functional elements. The report recognizes the need for distributed, flexible, yet responsive systems and ESE's need to have smaller, more manageable components.

The purpose of this paper is to provide an update on the NEW DISS study team's progress, and to report on the probable course of NASA ESE data management. The author will provide a perspective on these activities based on his involvement as a member of the NEW DISS study Core Team and as an EOSDIS Distributed Active Archive Center (DAAC) Manager.

JWS33/W/15-B2 1015

OPEN DISTRIBUTION OF LIVE SEISMIC DATA VIA THE INTERNET

Robert WOODWARD (United States Geological Survey, Albuquerque Seismological Laboratory, Bldg. 10002, Kirtland AFB-E, Albuquerque, NM 87115-5000, USA, e-mail: woodward@asl.cr.usgs.gov)

We have developed a mechanism for the open distribution of digital seismic data, in near-real-time, via the Internet. The seismic data are collected by stations of the Global Seismographic Network at sites on every continent. Data from these seismographic stations are used for a variety of purposes, such as earthquake reporting, tsunami warning, and nuclear monitoring.

The data distribution mechanism, which we call the Live Internet Seismic Server (LISS), is modeled on the concept of a webserver. The LISS accepts a virtually unlimited number of simultaneous client connections via the Internet. Each client simply stays connected to the LISS and receives copies of the digital seismic waveform data which the server is receiving from the seismographic stations. Thus, clients are connecting to the LISS to receive seismic data much like clients connect to a webserver to receive text or images. Latency of data obtained from the LISS is typically less than 30 seconds.

LISS's can be run in a chain, such that one LISS is a client to another LISS. In this way LISS's can be placed at different locations on the Internet to provide redundant paths for accessing the data. At present, auxiliary LISS's are running in Moscow and Beijing and these are forwarding data to the primary LISS at United States Geological Survey's Albuquerque Seismological Laboratory. Data from 30 stations around the world are presently available via theLISS. In addition to distributing these data, the most recent 24 hours of data from each station are plotted in a manner resembling the popular drum style (helicorder) recording mechanism which is widely familiar to the public. These plots are updated every thirty minutes and are accessible via the WWW. These data plots, as well as more information on the LISS, can be obtained via the WWW at the URL: http://aslwww.cr.usgs.gov/Seismic_Data/liss.htm.

JWS33/W/06-B2 1045

BASIC PACIFIC TSUNAMI CATALOG AND DATABASE, 47 B.C. - 1998 A.D

V.K.GUSIAKOV (Institute of Computational Mathematics and Mathematical Geophysics, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090, Russia, Email: gvk@omzg.sscc.ru)

A compilation of parametric tsunami data for tsunamigenic events occurred in the Pacific from 47 B.C. to 1998 has been made within the joint IUGG Tsunami Commission and ICG/ITSU Project "Basic Pacific Tsunami Catalog and Database". The project is directed to improve the situation with catalogization of historical tsunamis in the Pacific by means of organising them in the form of the database containing all the meaningful historical tsunami data along with additional reference information related to the tsunami problem. Its final goal is the development of the multimedia CDROM "Tsunamis in the Pacific, 47 B.B.- 2000 A.D.". The initial data collection has been made within the relational DBMS dBASE that has been established and being maintained at the Tsunami Laboratory of the Institute of Computational Mathematics and Mathematical Geophysics of SD RAS. A special graphic shell (the GIS-type mapping subsystem) has been developed for easy data manipulation, visualisation and handling. The condensed version of the database (the catalog of the Pacific tsunamigenic events) has been created on the basis of the MS SQL Server 6.5 and available on the following Web site: http://tsun.sscc.ru/htdbpac/. This site contains the most comprehensive and constantly updated list of historical tsunamigenic events in the Pacific with their basic source parameters. A set of parameters includes date, time, coordinates of the epicenter, source depth, surface-wave and moment-magnitudes, Abe's tsunami magnitude, tsunami intensity on the SolovievImamura scale, the maximum tsunami run-up height, the number of available run-up observations, cause of the tsunami, validity of the event, coded name of the source region and the main reference to the event. The full version of the database (including the catalog of historical run-up observations with geographical co-ordinates of sites) provided with the Windows-based graphic shell and geographic mapping subsystem is distributed on a CD-ROM. The example of the CD-ROM content can be found at the following URL: http://omzg.sscc.ru/tsulab/htdb_f.html).

JWS33/W/13-B2 Invited 1100

DATA COLLECTION, DATA PROCESSING AND DATA DISSEMINATION IN THE RUSSIAN VIRTUAL GEONETWORK

Pavel PLETCHOV (Geological department, Moscow State University, Moscow, Russia E-mail:lym@ccas.ru); Eugene Kozlov (Computational Mathematics and Cybernetics department, Moscow State University, Moscow, Russia E-mail:james@geo.web.ru)

RVGN - (Russian Virtual GeoNetwork) is distributed automated system, which ensure systematization, examination and periodic checks of an information on geosciences in a Russian part of Internet. The main server of the RVGN is available by URL: http://geo.web.ru/. RVGN is oriented to WWW (HTTP) access to each resource. The RVGN provides automatic checking of the current state of information resources of the net and a system of automatic distribution of information communications. A special robot regularly analyses the content of all informational RVGN resources, and if any changes are revealed made by the authors of the resource, or if a new information resource appears, the robot updates the corresponding information in the central RVGN database. The system automatically formulates communications about the detected changes, from key words draws the distribution list of information to interested users of the net, and transmits communications by the E-mail. RVGN includes a Link Manager program, which support dynamic lists of links. It's like thematic bookmarks or Internet directories, but all RVGN lists of links are constantly updated and automatically checked. Each RVGN expert can support own classification system and edit his classification via ClassEditor. ClassEditor allows create, delete classes and change class attributes. This system support enclosed sections of classification by parent class attribute. If a parent class is HTML file, content of this class will be written to this file. Otherwise, this class is a subsection of a parent class. As a result, dynamic lists of RVGN virtual layer are created daily. RVGN consists of a lot of the connected among themselves programs and user interfaces, which will be discussed in the presentation.

JWS33/E/09-B2 Invited 1115

AN APPROACH TO ON-LINE INTELLIGENT GEODATA ANALYSIS

V. GITIS, B. Osher, A. Dovgyallo (Institute for Information Transmission Problems, RAS, Moscow, Russia, gitis@ippi.ras.ru); T. Gergely (Applied Logic Laboratory, Budapest, Hungary, gergely@all.hu)

An approach to creation of information technology for on-line intelligent geo-information modelling and complex analysis of space-time properties of geological environment is suggested. The technology supports two types of users’ queries: (a) Getting knowledge about geological properties of a region; (b) Investigation of properties and solving practical problems of geological and geophysical forecasting. The client part of the system prototype is realised in Java 1.1 and is accessible on address http://www.iitp.ru/projects/geo and http://ta-www.jrc.it/gitis/geoprocessor.html. Applet supports the following functions of space-time data processing and analysis: (i) Cartographic data representation (map composition, sizes and scale changing, reading a map values, visualisation of crossections, compiling the maps of similarity with precedents); (ii) Data transformation: (shadow modelling, algebraic and logical raster operations, filtration, learning and testing sample sets formation); (iii) Plausible reasoning of forecast maps: (method of similarity, method of membership function, method of nonparametric regression). The work is partially supported by the project ASPELEA granted by EU Inco-Copernicus Project contract # ERBIC 15CT970200 and by Russian Foundation on Scientific Research, project # 97-07-90326.

JWS33/W/16-B2 1130

HIGH LEVEL SEARCH TOOLS FOR SPACE PHYSICS DATABASES

Mike HAPGOOD (CLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, UK, Email: M.Hapgood@rl.ac.uk); Chris Harvey (Centre d'Etude Spatiale des Rayonnements, 9 avenue du Colonel Roche, BP 4346, 31028 Toulouse Cedex 4, FRANCE, Email: Christopher.Harvey@cesr.fr); Jim Thieman (National Space Science Data Center, Code 633, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA, Email: thieman@nssdc.gsfc.nasa.gov)

As the number of space physics data-sets increases internationally it becomes increasingly important to have a method to find and retrieve data of interest wherever they are located on the network. One important method is the use existing web search engines such as AltaVista. This method is suitable for finding data made available by individual scientists and small groups. It requires only that the data are made available via a web page that is well-indexed using search keywords that are intuitive to the user. This method is likely, however, to give a large number of extraneous results as well. Another method, more suited for searching the larger data centres, is the use of a specialised search protocol limited to searching pre-selected sites. This protocol should also support searching for particular types of data recorded at a particular location or during a given time period. A similar protocol is already in use in searches for astrophysics data and includes support for searches over multiple sites. This protocol can be extended to allow simultaneous for overlapping data in selected time intervals or for particular locations. In this paper we discuss and assess the different search methods and describe efforts now underway to implement these ideas in space physics.

JWS33/W/03-B2 1145

AN INTEGRATED SATELLITE ALTIMETRY, GRAVITY AND GEODESY DATA BASE: ARCHITECTURE, VERIFICATION, DATA PROCESSING, DATA BASE MANAGEMANT SYSTEM

P.P. MEDVEDEV, Yu.S. Tyupkin, S.A. Lebedev (Geophysical Center, Russian Academy of Sciences, Molodezhnaya 3, 117296, Moscow, Russia, pmedv@wdcb.rssi.ru)

The integrated database of satellite altimetry data and supplementary gravity and geodesy information which is necessary for geodesy, geophysics, geology and oceanography applications was created in Geophysical Center of RAS. The satellite altimetry data sets include data measured by the Russian GEOIK geodetic satellites and by GEOSAT, ERS-1, ERS-2 and TOPEX/POSEIDON during the period 1985-1998. Database management system includes problem-oriented modes in additional to the usual DBMS functions. Database consists of three levels: preliminary data, integrated data, results of special processing. The architecture of database, database management system and data processing, future plans and problems are discussed. The work was supported by Russian Basic Research Foundation.

JWS33/W/14-B2 1200

VIRTUAL DATABASE DEVELOPMENT FOR FLOOD MANAGEMENT IN THE RED

RIVER BASIN

Slobodan P. SIMONOVIC (Natural Resources Institute, University of Manitoba, Winnipeg, Canada, R3T 2N2, e-mail: simon@ce.umanitoba.ca)

The interim report of the International Red River Basin Task Force (IJC, 1997) provides background on the 1997 flood and describes the development of virtual database as fundamental for success of the study. This paper describes issues involved in the development of a "virtual database" (Data catalog or library) in the form of an internet web site, in sufficient detail to provide the following services: (a) Quickly locate data required for flood reporting and flood fighting in the Red River Basin; and (b) Describe in detail the contents and limitations of the data. Virtual database is searchable by data type, data holder/owner, location, etc. It is proposed that a single link, such as a Web Page, be established that will be the door through which the overall Red River Database is accessed. During the Flood of 1997 numerous Internet "Flood Information" Web pages appeared that provided useful information to data consumers in the basin. However, these sites were not integrated in a way to allow access to all potential sites or sources of information. Based on the International Joint Commission (IJC) public meetings in the Red River Basin and user needs assessment, conducted in July 1998, there is a real need to integrate and make more readily accessible the distributed databases that currently exist and those to be developed in the future. The Red River Basin Virtual Database (RRBVD) has no single data repository thus eliminating the requirement to provide regular updates of data to a data clearinghouse. Some data sets, however, may need to be centralized depending on the preferences of the data set providers. The Red River Basin Virtual Database will be used in three modes: (a) planning and design for flood protection; (b) real time flood emergency; and (c) flood recovery.

JWS33/E/04-B2 1215

A NEW APPROACH TO GEOPHYSICAL DATA PROCESSING FOR DETECTING EARTHQUAKE PRECURSOR ANOMALY

Yueqing ZHU (Center for Analysis and Prediction, China Seismological Bureau, P. O. Box 166 Beijing, 100036, email:zhuyq@sun.ihep.ac.cn)

Audio-visual and comfortable detection to the earthquake precursor anomalies from geophysical observations is one of the very important aspects for earthquake prediction researches.

The Author and his research group have recently developed a strategy and a related intelligent software system for doing geophysical data processing and also detecting earthquake precursor anomalies from geophysical observations of different disciplines on single station and/or station networks. The results can be also automatically disseminated to a series of expert systems for doing medium-term, short-term and urgent earthquake prediction, which are developed by the author and his other research groups.

The system is consisted of a method-library, synthetic databases, GIS application sub-system, report and table auto-generation sub-system and anomaly feature auto-recognition and recording sub-system. The spatial and temporal variation features of the anomalies detected will be displayed in screen, listed in suitable tables and plotted in maps formed by GIS within suitable text reports in national language or English. It can detect special features of precursors of earthquake generation process and possesses good audio-visual functions.

JWS33/E/06-B2 1230

HIGH-CAPACITY NETWORKING TECHNOLOGY FOR PROCESSING OF THE EARTH'S VIBRATIONAL SOUNDING DATA

M.S.KHAIRETDINOV, Yu.I.Rodionov, A.P.Grigoryuk, L.G.Dvoretskaya, G.F.Sedukhina. (Institute of Computational Mathematics and Mathematical Geophysics, Siberian Branch, Russian Academy of Sciences.); M.S.Sevastianov, R.V.Radygin. (Novosibirsk State Technical University. Russia, Novosibirsk.)

The method of deep vibro-seismic sounding of the Earth, because of its high resolution and high accuracy of measurement, has considerable promise for solution of a number of urgent seismological problems. In the first place, these are: problems of monitoring of seismic-prone zones, seismic tomography, precise calibration of traces of seismic wave propagation, etc. Solution of these problems is connected with recording and processing of a large bulk of data, whose capacity can be estimated as N=Fd*p*M*L*T, where Fd is the sampling rate of input signal values, p is word length of sampling values, M is the number of recording channels, L is the number of repeating sounding performances, T is duration of each performance. Selection of the parameters L and T determines the noise immunity of vibroseismograms. As applied to solution of the problems in question, for example, to vibromonitoring of seismic-prone zones, an area of 1000 kmx1000 km, the capacity of accumulated information can reach about 100Gb. In order to handle such a large amount of information, the authors have developed a network technology of data processing, which consists of two levels. The lower level of processing is connected to data gathering stations and contains the software for recording and accumulation of initial data with their simultaneous processing, in the first place, calculation vibroseismograms (correlograms) and evaluation of their primary parameters of each of M channels in the real-time mode in the course of experiment. Because of the latter, the information is M*T/Ts times compressed, where Ts is duration of a vibrocorrelogram. In particular, at M=500, T=3600sec, Ts=150sec, the compression makes about 1000 times, which allows us to essentially decrease the requirements on the channels rate of data transmission to the processing system of the upper level. At the upper level of the system, additional processing ….

Tuesday 27 July PM

Presiding Chair: Yu S Tyupkin (Geophysical Center, RAS, Russia)

JWS33/E/17-B2 1400

REAL-TIME INTEGRATION OF SEISMIC DATA USING THE ANTELOPE SYSTEM

Danny J. HARVEY (Boulder Real Time Technologies, Inc., 2045 Broadway Str., Suite 400, Boulder, CO 80302, USA, email: danny@brtt.com); Frank L. Vernon (Boulder Real Time Technologies, Inc., 2045 Broadway Str., Suite 400, Boulder, CO 80302, USA, email: vernon@palapa.ucsd.edu)

Within the last several years, a new and effective real-time system for transporting and processing seismic data has been developed. This system, known as Antelope, makes it possible to integrate near real-time geophysical data from many diverse and geographically distributed data sources, over the Internet, into a complete real-time processing system. We will show how Antelope has been developed and how it has been used to create global scale "virtual" seismic networks composed of many different individual regional networks and single stations from other more traditional global networks. This has been accomplished with a minimal impact upon the operations of the station owners. In order to integrate real-time geophysical data flows, we make extensive use of both public and private Internet facilities and the standard TCP/IP communications protocols. We will show how Antelope provides important capabilities for geophysical data integration and data sharing that are relevant to all of the earth sciences.

JWS33/W/25-B2 1415

NEW WINDOWS-BASED SOFTWARE FOR GEOMAGNETIC OBSERVATORY DATA PROCESSING

D.C.HERZOG (USGS Box 25046, MS 966, Denver Federal Centre, Denver, Colorado 80225-0046, USA. Email: herzog@ghtmail.cr.usgs.gov)

The U.S. Geological Survey (USGS) has contracted with a commercial vendor to develop a new Windows-based application software program for processing geomagnetic observatory data. This graphical user interface (GUI) program provides a means for loading data from a variety of input formats; displaying it on-screen; deleting values with the aid of "blowup" sections of the plotted values; displaying the calibration baseline values and applying that data directly to the imported data values; and outputing the resulting data in a variety of file types, including the INTERMAGNET CD-ROM and WDC-A formats. The software provides "one-stop" processing capability and greatly improves the efficiency and flexibility with which observatory data can be processed.

JWS33/W/37-B2 1430

ANALOGUE MAGNETOGRAM SERVICE THROUGH INTERNET

Toshihiko IYEMORI, Masahiko Takeda and Toyohisa Kamei (WDC-C2 for Geomagnetism, Graduate School of Science, Kyoto University, Kyoto 606-8512, Japan, email: iyemori@kugi.kyoto-u.ac.jp, takeda@kugi.kyoto-u.ac.jp, toyo@kugi.kyoto-u.ac.jp); Akinori Saito, Yoshifumi Futaana and Tohru Araki (Geophysical Institute, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, E-mail: saitoua@kugi.kyoto-u.ac.jp, futaana@kugi.kyoto-u.ac.jp, araki@kugi.kyoto-u.ac.jp)

In recent years, most of geomagnetic data are provided in digital form through Internet etc.. However, there still exist many observatories, which use analogue magnetometers. At the World Data Centers, there exists a huge archive of analogue magnetograms recorded on microfilms or printed annual reports, which cover for more than 100 years. Although number of the users of these analogue data is decreasing, there still exist considerable amount of data requests. When we investigate the old events before 1980 or some historical events such as the geomagnetic effects of comet Halley's encounter in 1910, we need to look at the analogue magnetograms. To use the analogue data recorded on microfilm, the user have to visit the data center or the staff at the center have to make hard copy of them and send by mail. Users often give-up to use the analogue data because of such procedure which takes time. To improve such situation, we are constructing a system to serve the image files of magnetograms from WWW. We report the method and quality of analogue magnetogram service through Internet and discuss on the problems and future possibility.

JWS33/W/01-B2 1445

THE RUSSIAN MAGNETIC OBSERVATORIES DATA ON CD-ROM

Alexander ZAITZEV and Vladimir Odintsov (Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation,Troitsk, Moscow Region,142092, RUSSIA, e-mail: zaitzev@izmiran.rssi.ru)

Despite the general problems of the Russian science, the network of the magnetic observatories of Russia and CIS are still operated. As a rule, all observatories have own hardware and software systems and store an original records on sites which are inaccessible to a wide range of users. We propose to convert the all variational data of magnetic observatories in 1-min binary format and to save it on an optical disk (CD-ROM). In addition of data base production we propose to create the information system for automated data processing. The final CD-ROM we plan to install on Web server to organise a data access via INTERNET . It will allow the broad usage of the magnetic observatories data in the scientific and applied research programs. At the first stage for accommodation on CD-ROM we collect the results of the Moscow observatory data in the form of standard tables of hourly values and 1-min. variational data for period 1991-1998. The variational data was received on experimental digital station CMVS-6. The current observations in the form of variational data are displayed on site: http://www.izmiran.rssi.ru/magnetism/mos_data.htm. Beside Moscow data we have a regular 1-min. variational data from expedition site Cape Kamenny (Yamal peninsula), for Jan. 1991 - Sep. 1998, and Cape Schmidt (Chukotka region) observatory for 1995-1997. We call of all our colleagues on Russian magnetic observatories to help us collect the digital data, which might be available for period 1991 and onwards. In the final stage of the project we plan to make enough CD-ROM copies to supply of all scientists interested in Russian magnetic observatories data for period of 1991-1998. The work is supported by Russian Fund of Fundamental Researches Grant 98-07-90278.

JWS33/E/13-B2 1500

PRESENTATION OF THE GEOMAGNETIC DATA BASE OF THE NIEMEGK OBSERVATORY VIA INTERNET AND ITS ACCESS

Hans-Joachim LINTHE (GFZ Potsdam, Adolf-Schmidt-Observatory, Lindenstr. 7, D-14823 Niemegk, Germany, email: linthe@gfz-potsdam.de)

The Adolf-Schmidt-Observatory Niemegk is in continuous operation since 1890. So the observatory today manages a data series of nearly 110 years. Hourly, monthly and annual mean values are available in a database for the whole period. Additional minute mean values, instantaneous minute values, instantaneous second values and activity indices for longer or shorter periods are also contained in the database. The database is handled by means of the local area network of the observatory, which consists of several PCs, a workstation and software routines. The structure of the data, the data handling and the methods of data access will be presented.

JWS33/W/30-B2 1515

DATA CREATION USING THE SCF SYSTEM

CARRIE A. GONZALEZ (Instrumentation and Space Research Division, Southwest Research Institute, San Antonio, Texas 78228, e-mail: carrie@pemrac.space.swri.edu)

Many times in the space physics world there arises the need to derive different quantities based upon data parameters that are returned by one or more spacecraft. In some cases, these derived products may be dependent upon values returned from a single instrument; in other cases, the derived products are dependent upon values taken from many instruments. In either case, there is a need to specify data parameters and the algorithms necessary to produce derived data products. To fill this need, a domain specific system has been developed that allows for the definition of the new space data products from an homogeneous, spacecraft/instrument independent primary data format. This system, referred to as the SCF (Science Computation Formulation) software, utilizes a GUI-based definition session in which the user defines the input variables, the temporary variables and the output variables in addition to the actual set of mathematical operations to be performed on the data to produce the derived data products. The input variables are symbolic names given to the data parameters returned by the spacecraft. Temporary variables are symbolic names given to hold constant values (such as pi) or to hold intermediate results during the evaluation of the algorithm (such as the angle between the spacecraft velocity vector and the vector to the sun). Output variables are symbolic names given to the derived data products that are returned by the software. For the algorithm definition, the SCF software recognizes the standard mathematical operations of addition, subtraction, multiplication, and division. These operations are designed to operate on vector-vector, scalar-scalar, or vector-scalar quantities. In the SCF context, a scalar quantity is a single value and a vector quantity is a multi-value entity (an array of values). For the vector-vector operations, the lengths of the vectors must be the same. In addition to the standard mathematical operators, the SCF software supports standard mathematical functions such as square root, sine, cosine, and polynomial expansions to name a few. The SCF software also supports tensor data products. To date, the SCF mathematical library for matrix operations include addition, subtraction, and multiplication. There are functions that return the lower and upper triangular of a given matrix or an identity matrix of a specified order. The trace of a matrix, the transpose of a matrix, the determinant of a matrix and the inverse of a matrix are also supported functions within the SCF mathematical library. The definition of the derived data products is made once and then that information is stored. Realization of the new data is achieved with a set of routines that execute the algorithm steps and return the computed data values. The data can then be plotted or be fed as input into another higher order computation. The SCF generated data is done in a manner consistent with the format of the primary data thus ensuring its compatibility with all existing applications for the primary data. In this manner, sets of descriptions can be strung together to generate physical quantities important to science analysis.

JWS33/P/2-B2 1550

EARTHQUAKES AND THEIR SPECTRAL ESTIMATIONS USING

EINSTEIN DECONVOLUTION

Dan LOEWENTHAL, Raymond & Beverly Sackler (Faculty of Exact Sciences Department of Geophysics and Planetary Sciences and Tel Aviv University (Ramat Aviv 69978, Israel. danlo@jupiterl.tau.ac.il)

In a recently patented idea, I have conjectured the validity of dual fields theory, which teaches us how seismic or electromagnetic phenomena can be analysed to a much higher precision in comparison to a single field analysis.

In its acoustic embodiment these dual fields are the pressure and the particle velocities fields, as registered by hydrophones and geophones, respectively. This can be effectively done in ocean bottom environment. According to this theory both these fields are initiated by the same source. They both solve the same classical wave equation in regions of homogeneous layers but they differ and are nonlinearly coupled through the boundary conditions, where they possess opposite sign reflection coefficients. Since the source is common, it convolves both fields. Thus, its Green's function is estimated by the ratio of these fields defined through its Z transform polynomials. Using transform ratio of these two fields, a rational polynomial presentation of the system is attained, where the source wavelet cancels out. This allows deterministic spectral estimation similar to the maximum entropy or bayesian estimators. But while the bayesian and maximum entroy estimators are of trial and error statistical approach, our source de-convolution, which is the essence of Einstein-Lorentz velocities additions-subtractions formula, is deterministic in nature.

JWS33/W/21-B2 1605

SEARCH INFORMATION RESOURCE IN THE FIELD OF OCEANOGRAPHY USING INTERNET

Evgeny D. Vyazilov and Valentine I.Ibragimova (Russian Research Institute of Hydrometeorological Information - World Data Center 6, Korolyov St., Obninsk, Kaluga region, 249020, Russia,

e-mail: vjaz@meteo.ru)

An abundance of WEB sites created in INTERNET on oceanography as well as their volume make search and browse of the necessary data very difficult. A lot of servers already are provided with pages containing the list of hat links that are considered useful for the potential users. These addresses are often poorly classified and are not accompanied with information. The most well classified server is IOC WEB site. From viewpoint of search of different organizations' pages, involved in the ocean exploration, this is the best server. Unfortunately, information resources are not presented there. In some research directions the special pages are already created of a general character. Those pages present summaries on information resources in this or that country (e.g. Russian information resources in INTERNET) or separate scientific directions.

That is why there is a strong demand for creation a page for organizing a search of information resources in the field of oceanography. The structure of such a page is as follows: general address (publish house, libraries, magazines, councils, education, hot links, search of work, conferences, funds, plays and other); metadata (platforms, experts, databases, formats, projects, inventories and other); information on organizations (address, functions, projects, in which participate organization); information technology (GIS, software, satellite, ftp).

JWS 33/E/14-B2 1620

ELECTRONIC PUBLISHING ENVIRONMENT IN GEOPHYSICS

Vitaly NECHITAILENKO (Geophysical Center, Russian Academy of Sciences, 3 Molodezhnaya Str, Moscow 117296, RUSSIA, email vitaly@wdcb.rssi.ru)

The paper will discuss the state-of-the-art of electronic publishing in geophysics and its nearest perspectives with the emphasis on technical issues, especially on creating an integrated environment for collecting and managing both data and results of their analysis.

The discussed EP environment (http://eos.wdcb.rssi.ru/) developed at Geophysical Center RAS includes a full set of technologies and tools for preparation of papers from manuscript to print and online versions, including online submissions, peer-review process, updating and revising papers, back- and forward referring, markup language conversion, hyperlinking based on automatic syntax analysis, and interface to data bases and interactive components.

The current EP technologies and tools, and those which will appear in the nearest years, produce strong influence on authors' and publishers', as well as data producers' and data managers', roles and vice versa. In this respect an emphasis will be given to hot and cool technologies and tools, a problem of their harmonization. Main elements of the paper are supported by online presentation.

Presiding Chair: V Gitis (Institute for Information Transmission

Problems, RAS, Moscow, Russia)

JWS33/W/22-B2 Poster 1635-01

NETDC: A SYSTEM TO NETWORK SEISMOLOGICAL DATA CENTERS

Tim AHERN and Rob Casey (IRIS Data Management Center, 1408 NE 45th Street, #201, Seattle, WA 98105, USA, Email: tim@iris.washington.edu); Doug Neuhauser and Stephane Zuzlewski (475 McCone Hall, UC Berkeley, Berkeley, CA 94720, USA Email: doug@perry.berkeley.edu); Bernard Dost (ORFEUS Data Center, PO Box 201, 3730 AE De Bilt, the Netherlands, Email: dost@knmi.nl); Genevieve Roult (Institute de Physique du globe de Paris, Dept. de Sismologie, Programme GEOSCOPE, 4, Place Jussieu, 75252 Paris cedex 05, France, Email: groult@ipgp.jussieu.fr)

The Federation of Digital Broadband Seismographic Networks (FDSN) has implemented a system that supports data request processing for distributed data centers. The NETDC system allows users to make requests for various types of information to any of the participating data centers, independent of where the data actually reside.

The NETDC system manages the coordination of information requesting and information distribution between the data centers in a manner that is transparent to the seismological data requester. At the present time requests can be made for station inventories, channel response information, and for seismic waveform data. The system is easily extensible to other data types.

Currently data centers in Seattle, Washington, Berkeley, California, deBilt, the Netherlans and Paris, France have installed this system. This presentation will summarize how the NETDC system works, what the present status of the system is and hopefully encourage other disciplines to consider a similar method for standardizing methods of coordinating a globally distributed system of data centers.

JWS33/W/34-B2 Poster 1635-02

ADVANCES IN CRYOSPHERIC DATA MANGEMENT

Roger G. BARRY, Ronald L. S. Weaver, Matthew Cross, Gregory Scharfen (National Snow and Ice Data Center, CIRES, Campus Box 449, University of Colorado Boulder, Colorado, 80309)

Over the past 10-15 years the National Snow and Ice Data Center (NSIDC) has played a pro-active role in cryospheric data management. Three themes illustrate the advances that have been made. (1) In the areas of new integrative products, three major CD-ROMs were produced. These comprise: the first global assembly of data and information on frozen ground and permafrost; the CAPS CD-ROM which contains digital maps of permafrost, numerous soil temperature and borehole data sets, a 12-language glossary, a cumulative bibliography and an inventory of Russian permafrost maps. A second example is the Polar Pathfinder Sampler CD-ROM that provides combined fields of IR/VIS AVHRR, passive microwave SSM/I and TOVS atmospheric sounder data in a common (Equal Area Scalable Earth Grid) geo-referenced system. A third product is an educational CD (Into the Arctic), designed for schools, using Greenland ice core climate data. (2) NSIDC has provided leadership in data set collection and dissemination through active collaboration with scientific societies and organizations. These include the IPA, the WGMS for glacier inventory data, CONMAP SCAR for the US National Antarctic Data Center for Antarctic metadata, the WMO Commission on Maritime Meteorology for the Global Sea Ice Data Bank and the International Antarctic Buoy Program (IABP). (3) NSIDC's participation in the GCOS TOPC and the IPA Working Group on Data and Information has helped stimulate the organization of a global monitoring network for ground temperature regime (the Circumpolar Active Layer Monitoring Program network), involving data protocols, site selection etc. at the national level. NSIDC's role in the US NSF ARCSS Data Management and the Antarctic Master Directory contributed to the development of NSF guidelines for investigators to submit data to Data Centers in a timely fashion.

JWS33/E/05-B2 Poster 1635-03

DATA COLLECTION AND PROCESSING AT THE ISTITUTO NAZIONALE DI GEOFISICA DATA CENTER

L. BADIALI, F. Mele, R. Di Giovambattista and A. Basili (Istituto Nazionale di Geofisica, Via di Vigna Murata, 605, I-00143 Roma, Italy. E-mail: BADIALI@ingrm.it)

With the advent of Internet, there was an arise of the request for real time access to seismic data. In an effort to advance the Italian Telemetered Seismic Network (ITSN) we developed a new system for acquiring and processing digital and analog signals that makes extensive use of both standard internet TCP/IP communication protocol and international standard for data exchange. We identify 5 different levels of available information: (1) triggered or continuous seismic signals, (2) automatic picking of seismic phases, (3) automatic determination of earthquake location and magnitude, (4) locations reviewed by a human analyst for prompt alarm and (5) parameters reviewed and analysed by humans after integration with all the available data. Each level of information has its own distribution link.

Data are disseminated in two different ways: (1) the system sends data to a predefined list of targets as soon as they are available or (2) stores them on a server for distribution on request.

JWS33/W/26-B2 Poster 1635-04

INCREASED DEMAND FOR RAPID ACCESS TO UK MAGNETIC OBSERVATORY DATA : IMPLICATIONS FOR QUALITY CONTROL PROCEDURES

Ellen CLARKE and Pamela White (both at Global Seismology and Geomagnetism Group, British Geological Survey, West Mains Road, Edinburgh, EH9 3LA, Scotland. e-mail: e.clarke@bgs.ac.uk)

The scientific and commercial demand for rapid access to UK magnetic observatory data has steadily increased over recent years, prompting the continued development of the data processing procedures and quality control standards. The modern user requirements for accurate as well as timely data has triggered the need for refined automatic quality control procedures. This paper discusses these procedures, highlighting the different user requirements in terms of level of accuracy and speed of dissemination of the data products.

JWS33/E/10-B2 Poster 1635-05

DATA PROCESSING IN THE ARCTIC OCEAN DIGITAL BATHYMETRY MODEL

Elena DANIEL (All-Russia Research Institute for Geology and Mineral Resources of the World Ocean, 1, Angliysky pr., St.-Peterburg, 190121, Russia, email: dani@vniio.nw.ru)

A new computer model of the Arctic Ocean is made under the activity IOC/IASC/IHO project (Macnab & Grikurov, 1997) for building of an international digital bathymetric data base of the Arctic High Seas. The digital model (bathymetry presented as 10 x 10 km grid) is a first relies of the compilation of the various Russian and western bathymetry data. These data include initial observations, digital contours from published bathymetric maps, global data sets. The compilation has started with the collection, digitisation, formatting, editing, and adjustment of bathymetric data. The next step included building a coherent digital data base, gridding and production of computer derived bathymetric maps. The data were processed using common technological procedure for digital compilation of potential fields and other geophysical data. However there are some special items in coherence and gridding of bathymetric data due to higher variability of depth field in comparison with that of magnetic and gravity anomalies. Methods that provide with grid values calculations according to specific features of bottom topography (the existence of linearly extended features, complex mosaic relief, offshore zone, etc.) were used for the constructing of correct digital model. They improved the bathymetry model especially under conditions sparse data distribution in the Arctic Basin. The digital relief model will be distributed on CD-ROM as an ASCII-file containing grid values and as a graphic file that displays bathymetry, and, in addition, as printed maps at a scale of 1:6,000,000.

JWS33/E/03-B2 Poster 1635-06

POST-PROCESSING OF SEISMIC EVENTS RECORDED BY THE ISTITUTO NAZIONALE DI GEOFISICA SEISMOGRAPH NETWORK: AN ANALYSIS OF THE ACCURACY OF THE MAIN DISSEMINATED SEISMIC PARAMETERS

R. DI GIOVAMBATTISTA, F. Mele, A. Marchetti, L. Badiali, S. Baccheschi,P.Battelli, L. Giovani, G. Modica, L. Piccolini, F. Pirro, M. Pirro, R.Tardini and A. Basili (Istituto Nazionale di Geofisica, Via di Vigna Murata, 605, I-00143 Roma, Italy. email: digiovam@marte.ingrm.it)

Some of the most significant advances in seismology have resulted from analysis performed on the seismic parameters reported in the Bulletins and disseminated by the seismological data centers. A large fraction of works on travel time residuals and tomography has relied upon arrival times published by the bulletins. A precise estimate of the onset time of seismic phases is needed to obtain accurate event locations necessary for seismological studies of spatial patterns of earthquake hypocenters. To obtain very precise onset times for all seismic signals, seismological data center mostly rely on the picks provided by their human analysts. However, the increase in the number of analysts and the quality of arrivals reported in bulletins has also been debated. We present the results of an analysis aimed to estimate the quality of phase arrivals. A comparison between the arrival times reported in the Istituto Nazionale di Geofisica (ING) bulletins and those retimed in an effort to obtain accurate pickings for a tomographic study is also presented.

JWS33/W/23 -B2 Poster 1635-07

GIS TOOLS TO STRUCTURE THE CENTRAL ANDES ON A REGIONAL SCALE

H.-J. GOETZE and S. Mohr (FU Berlin, Institut fuer Geologie, Geophysik und Geoinformatik, Malteserstr. 74-100, D-12249 Berlin, Germany, email: hajo@geophysik.fu-berlin.de)

For the last ten years the Central Andes fold belt is focus of scientific investigations conducted within the frame of the ''Collaborative Research Center 267 -- Deformation Processes in the Andes''. Over the years a wealth of data from various disciplines of geosciences has been compiled. To handle this information, and to support an interdisciplinary and international cooperation among involved scientists, the establishment, organization and maintenance of a diversified GIS was necessary, and a data catalogue was set up, which is available on the Web under URL: http://userpage.fu-berlin.de/~data.

Application of GIS methods allows structuring of the remote mountainous region of the Central Andes on a regional scale, which is generally marked by a lack of infrastructure and by topographic extremes. Numeric procedures, such as statistical methods, filter techniques or algorithms of lineament recognition are applied. For example the evaluation and interpretation of geomorphometric data is suited to identify various morpho-structural units of the Andean topography. Investigations of the intensity and direction of inclination and characterization of vertical doming allow to outline the regional strike and identify predominant structural directions. Lineaments, derived from data of topography and gravity grids with objective methods such as algorithms of edge detection or horizontal gradient recognition, which are only in part suitable for correlation with geological data, can also be used for an identification of the structuring of areas under investigation. Investigations of the fractal geometry of contour lines in areal portions warrant a subdivision into morphologically weak and strong structured regions, and reflect the different climatic conditions at the western continental margin of South America.

JWS33/W/09 -B2 Poster 1635-08

EXPORTING IDFS-FORMATTED DATA TO CDF and NETCDF FORMATS

Carrie A. GONZALEZ (Instrumentation and Space Research Division, Southwest Research Institute, San Antonio, Texas 78228, e-mail: carrie@pemrac.space.swri.edu)

Southwest Research Institute has developed a data storage format referred to as the Instrument Description File System (IDFS) format. The IDFS format is a data storage format that is designed to be general enough to handle the majority of spacecraft science and engineering data sets. These data sets include raw telemetry, processed data, simulation data and theoretical data. The IDFS paradigm performs a real-time conversion of telemetry data into physical units as the data is accessed. This approach allows for the refinement of calibration factors and processing algorithms without having to reprocess the original data set and avoids the storage of many different unit values. A small core of generic routines services the IDFS format. This covers access of the individual data files through a distributed database, positioning within the data file based on time, access of the data and the real-time conversion of the data to physical units.

Recognising the popularity of the CDF and netCDF file formats, Southwest Research Institute has developed software that extracts and exports data that has been stored in the IDFS format. Currently, IDFS data can be exported to one of three file formats:

(1) Common Data Format (CDF version 2.6)

(2) Unidata Network Common Data Form (netCDF version 2.4)

(3) IDFS - ASCII dump

When the CDF file format is selected, a CDF file is created which contains the requested data parameters and meta data. The meta data is comprised of global-scope attributes that provide information about the data set as an entity. Some of the required global attributes have been selected for potential modification by the user.

JWS33/W/12-B2 Poster 1635-09

DATA PROCESSING AND PRODUCTS AT THE GERMAN SEISMOLOGICAL DATA CENTER

Gernot HARTMANN (Federal Institute for Geosciences and Natural Resources, Stilleweg 2, 30655 Hannover, Germany, Email: hart@sdac.hannover.bgr.de)

The German Seismological Data Center operates the seismic GERESS array of 25 stations and is responsible for the collection of data from the German Regional Seismic Network (GRSN). This network consists of 13 three-component broadband stations distributed throughout Germany. Real-time data from the GERESS array are recorded continuously at the Data Center. The data from the GRSN stations are automatically retrieved at the end of each day. A seismic alert system provides for rapid epicenter determination of strong events in Germany and adjacent areas. Triggered by a detection algorithm applied to the data of the GERESS array, time segments of the assumed event are retrieved from the GRSN stations for confirmation of the detection and improvement of the epicenter and magnitude determination. The continuously recorded data, as well as the data segments of strong events, are stored on a RAID system until they are archived on CDRs in two jukeboxes with 500 CDs each. This technique provides immediate access to all data, either interactively or by autoDRM via e-mail.

This data forms the basis for routine analysis, which includes several newly developed automated procedures:

(1) event detection, location, and epicenter determination;

(2) testing of the reliability of the results by several consistency checks;

(3) screening out explosions from well known quarries and mines.

The interactive analysis of these predefined events ensures the high quality of the determined event parameters, stored in a database management system. The results of automatic and interactive data analysis are published on the homepage of the Data Center. A monthly catalogue of local and regional events is produced by including associated epicenter determinations and phase readings reported from a number of local networks in Germany. A compilation of this catalogue data is published annually as the German Earthquake Data Catalogue. The data processing schemes and their interaction are presented in the poster.

JWS33/E/08-B2 Poster 1635-10

THE SOUTHERN CALIFORNIA EARTHQUAKE CENTER DATA CENTER (SCEC-DC)

K. HAFNER, R. W. Clayton (Seismological Laboratory, Caltech,California)

The SCEC-DC is the principal archive for seismological waveform and associated parametric data from the Southern California Seismic Network (SCSN). Established in the fall of 1991, the SCEC-DC is now entering a major period of transition. In addition to expanding its archive from a 0.6 Tbyte to a 5 Tbyte WORM mass storage system, the SCEC-DC is developing a new database/archiving system. This system will result in a more interdependent relationship between the SCEC-DC and the real-time data collection/data analysis systems of the SCSN. The system under development has three primary missions: 1) provide rapid access to real-time parametric and waveform earthquake data, 2) consolidate and maintain one oritative database available to the real-time data acquisition systems, the data analysts and the archive facility; and 3) facilitate a seamless exchange of seismological waveform and parametric data with other seismological data centers. In our system, the real-time data collection system populates a local database with parametric earthquake data. This data is "replicated" to a database on the SCEC-DC, where it is accessible within a few minutes of an event. Data analysts interact with and update the database via a java GUI interface, while other users of the data access the database via WWW interfaces on various internet and intranet sites. These interfaces will allow users to search and extract from the earthquake hypocenter and phase catalogs, view and request calibrated waveforms, and view such products as Shakemaps. Once this database comes on-line, it will provide "real-time access" for an average of 26,000 earthquakes/year, in addition to storing the ~400,000 events in the historical Southern California earthquake catalog.

JWS33/W/10-B2 Poster 1635-11

WEB EFFECTS: FRONTIERS IN INFORMATION DELIVERY

Allen M. HITTELMAN and Susan J. McLean (NOAA's National Geophysical Data Center,

World Data Center for Solid Earth Geophysics, 325 Broadway, Boulder, CO 80303, U. S. A.,

email: ahittelman@ngdc.noaa.gov)

Without question, one of the most profound impacts on information technology is the advent of the Web. In just a few years, this media has drastically altered our perceptions of information services and created new paradigms for data dissemination. To cope with this unprecedented explosion of change, many of us in the information service business had to re-evaluate organisational goals and objectives. Where once we felt comfortable with our awareness of user needs, now we fell distant due to the impersonal nature of our Web sites (which seem to serve 99% of our scientific clientele's needs).

The National Geophysical Data Center, and its several supported World Data Centers, has pioneered many new innovative methods that enrich data and information delivery on the Web. Examples of these techniques include: the interactive creation of graphical spreadsheets (see http://swat.ngdc.noaa.gov/cgi-bin/wist/wist.pl), the satellite browse, display and download features of the Space Physics Interactive Data Resource (SPIDR, see http://julius.ngdc.noaa.gov:8080/) and access to gridded relief models (see http://www.ngdc.noaa.gov/seg/topo/globe.shtml). Newer techniques are empowering users with the ability to access data and metadata through GIS-enabled Web servers. We have also explored data mining tools to provide improved understandings of the needs of our Web users -- from where do they come and for what do they search?

JWS33/E/06-B2 Poster 1635-12

HIGH-CAPACITY NETWORKING TECHNOLOGY FOR PROCESSING OF THE EARTH'S VIBRATIONAL SOUNDING DATA

M.S.KHAIRETDINOV, Yu.I.Rodionov, A.P.Grigoryuk, L.G.Dvoretskaya, G.F.Sedukhina. (Institute of Computational Mathematics and Mathematical Geophysics, Siberian Branch, Russian Academy of Sciences.); M.S.Sevastianov, R.V.Radygin. (Novosibirsk State Technical University. Russia, Novosibirsk.)

The method of deep vibroseismic sounding of the Earth, because of its high resolution and high accuracy of measurement, has considerable promise for solution of a number of urgent seismological problems. In the first place, these are: problems of monitoring of seismic-prone zones, seismic tomography, precise calibration of traces of seismic wave propagation, etc. Solution of these problems is connected with recording and processing of a large bulk of data, whose capacity can be estimated as N=Fd*p*M*L*T, where Fd is the sampling rate of input signal values, p is word length of sampling values, M is the number of recording channels, L is the number of repeating sounding performances, T is duration of each performance. Selection of the parameters L and T determines the noise immunity of vibroseismograms. As applied to solution of the problems in question, for example, to vibromonitoring of seismic-prone zones, an area of 1000 kmx1000 km, the capacity of accumulated information can reach about 100Gb. In order to handle such a large amount of information, the authors have developed a network technology of data processing, which consists of two levels. The lower level of processing is connected to data gathering stations and contains the software for recording and accumulation of initial data with their simultaneous processing, in the first place, calculation vibroseismograms (correlograms) and evaluation of their primary parameters of each of M channels in the real-time mode in the course of experiment. Because of the latter, the information is M*T/Ts times compressed, where Ts is duration of a vibrocorrelogram. In particular, at M=500, T=3600sec, Ts=150sec, the compression makes about 1000 times, which allows us to essentially decrease the requirements on the channels rate of data transmission to the processing system of the upper level. At the upper level of the system, additional processing of seismograms is implemented…

JWS33/E/01-B2 Poster 1635-13

THE METHOD OF THE ANALYTICAL AND NUMERAL DESCRIPTION OF THE GEOMAGNETIC FIELD'S GRADIENTS FOR ITS USING TO SOLVE THE GEOLOGICAL AND NAVIGATION PROBLEMS

Valentina I. KOLESOVA, Maria A. Effendieva and Sergey V. Hotin (St.-Petersburg filial, Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation, Muchnoy per.2, box 188, 191023, St.-Petersburg, Russia, Email: kmp@telecom.lek.ru)

The gradients of the geomagnetic field can be successfully used to investigate the physical processes at the Earth and in the space, to solve scientific and applied problems in the geology and the navigation. Now in general case geomagnetic gradients can be received only by calculation. It was supposed to consider the value of the magnetic field in any point of the space to be the sum of the four components: the main field, the intermediate anomalies field, the regional field and the local field. The gradients of the main field are described the best of all by the Gaussian series. The construction of the fictitious dipole sources approximate the intermediate anomalies. The geometrical parameters of the construction are determined previously at the base of the space spectral analysis. The gradients of regional and local anomalies are calculated using the Poisson's integral. For the essential decreasing of the calculation time and increasing of the result accuracy it was offered to approximate the field by quadratic function at the range of the elementary grid. Then the integral can be calculated analytically in the quadratures using the formula of the highest algebraic accuracy. The method of the magnetic gradients calculation was realised in algorithms and programs, the last were included in the system, which guarantee the functioning of the database. The system gives the opportunity to digitise graphs, maps of graphs, maps of isolines; to include data in the database, to control data, to do the data processing, to create analytical and numeral geomagnetic field models, numeral and graphical charts, to visualise the information.

JWS33/W/28 -B2 Poster 1635-14

FIELD AND OBSERVATORIES MAGNETO-TELLURIC WIDE AREA NETWORK

Eugene KOPYTENKO, Yury Kopytenko, Andrej Radilov (SPbF IZMIRAN, Muchnoj per.2, Box 188, St.Petersburg, Russia, email: ek@eak.izmi.ras.spb.ru)

SPbF IZMIRAN is continued its developing in the field of high sensitive magnetometric system. On the base of MVC-2DS, multipurpose magnetotelluric station, it was build Wide Area Network for monitoring quick running processes both in magnetic and telluric fiedls, and in a third (three component) geophysical channel in quasi real time. System consist of Remote Station equipped with high sensitive torsion type magnetometer, 24-bit resolution Analogue to Digital Converter driven by GPS controlled clock, remote PC running under LINUX (UNIX clone OS) and Laboratory’s Server. Data are buffered at remote PC. Server collects it and transmits it to the computers, which are included into the list of reciepients.

JWS33/L/1-B2 Poster 1635-14

NEW APPROACHES TO DATA COLLECTION, DATA PROCESSING and data dissemination

KUDRIASHOV

Abstract not available at time of going to press

JWS33/E/16-B2 Poster 1635-16

ABOUT EARTH'S FREE OSCILLATIONS IN THE FORM OF TILTS AND STRAINS

Ludmila LATYNINA, Aleksei Ljubushin, Denis Vvedensky (United Institute of Physics of the Earth, RAS, B.Gruzinskay,10 , Moscow Russia, 123186 email: lat@uipe-ras.scgis.ru, Fax (095) 2556040

Data of oscillations within the periods of 2 minutes to 2 hours have been obtained at Protvino observatory near Moscow with help of strainmeters and tiltmeters. The recording computer with16-bit ADC keeps records with resolution equal to 0.1E-09. We consider the Earth free oscillations of last strong Earthquakes and the results of spectral analysis of the observational data during several months. Continuous noticeable oscillations have been observed at the same frequencies (between 3 and 8 mHz) as in works by T.Tanimoto and others and by N.Suda and others (1998). The attempts of long-periodic wave forerunners discovering before strong Earthquakes have been made.

JWS33/W/17-B2 Poster 1635-17

USAGE OF MODERN METHODS OF REFERENCE OCEANOGRAPHIC

DATA ORGANISATION

Igor LEBEDEV, Ludmila Kuznetsova (All-Russian Research Institute of Hydrometeorological Information - World Data Center (RIHMI-WDC), department National Center Oceanographic Data of Russia, 6, Korolyova st., Obninsk, Kaluga region, 249020, Russian Federation; Tel: (7)(08439) 74676; Fax: (7)(095) 2552225; email: lebedev@meteo.ru)

In early 80s Oceanographic Data Centre of Russia pioneered the creation of reference information base on oceanographic data. Since then information base had been used on RV cruises, research projects (programmes), observing platforms, marine institutions and agencies, etc. At the moment reference information data are organised in dbf-tables and are applied under control of DBMS Microsoft FoxPro 2.0. These data are used for obtaining various kinds of reports and references as well as working with observation data.

But there are also a number of drawbacks. These are errors in organising some tables, which are not associated with each other; poor automatization in work with reference data. The need is now obvious for organising reference information into unified database under modern DBMS control that enables one to apply the architecture of client/server computing and the distributed data processing. Besides, a demand arose in publication of some certain reference data on Web. Similar work is already being performed in some data centres /abroad.

Some time ago realisation of such a database was started in Oceanographic Data Centre. Oracle8 is used as the DBMS, meeting all the requirements needed. The development of database and its pilot loading has been performed by the present moment. The work is currently underway on refinements of the database structure; working out additional requirements of the final loading of all data as well as development and creation of the client

applications.

JWS33/W/36-B2 Poster 1635-18

DISSEMINATING AEROMAGNETIC DATA ON THE WEB

Susan Mclean (World Data Centre, smclean@ngdc.noaa.gov)

The National Geophysical Data Center (NGDC) is undertaking a pilot study to make critical aeromagnetic data sets available via the WWW. The project's goal is to address problems of multiple grid formats, large file size and regionally distributed data. One significant problem when distributing data via the WWW is the potential separation of associated metadata. Proper recognition of the organization or institution that originally collected the data and any value added processes that contributed to the present version of the data set must be retained. A pilot system to access aeromagnetic data via the WWW will be demonstrated by NGDC. The ESRI Spatial Data Engine (SDE) and Oracle database are the heart of the web site. Using these tools, we enable a GIS expert system with dissemination via FTP on-line or CD-R and DVD-R for off-line delivery. In many cases, higher resolution data sets exist. In these circumstances, we provide the proper links and contact information to the original organization. If the large file size presents a data transfer problem, we offer an alternate off-line data distribution method using CD-R or DVD-R.

JWS33/W/05-B2 Poster 1635-19

COMPUTER SYSTEM OF KEEPING, PROCESSING AND ANALYSIS OF GEOMAGNETIC DATA

Oleg MIKHEEV and Pyotr Djadkov (Institute of Geophysics, av. Acad. Koptyug, 3, Novosibirsk, 630090, Russia, E-mail: oamih@uiggm.nsc.ru)

Modern development of the geomagnetic instruments is characterized by high accuracy and possibility of digital registration of continuous observations carried out both geomagnetic observatories and stations on different geophysical polygons. Necessity of realisation of modern instrumental possibilities requires a special computer system which allow to operating and suitable performance of the data. Such a system is elaborated now under IDE "Delphi 3" onWindows95 platform. It has several basic aims: 1) maintenance of reliable keeping and initial processing of large data arrays; 2) getting high quality authentic information as result of using special algorithms for elimination of outliners and different artificial and natural geomagnetic noises; 3) opportunities and techniques for detailed special analysis of information. As core for the database access system is using the integrated system - Borland Database Engine. The basic data format is the native dBaseIV-format in which digital primary data are converted by original software. On a contemporary stage the system is interpreted as local database, but afterwards its way can be extended to Intranet/Internet data-access technology. The system is under evaluation on the Baikal geodynamic polygon, where at present time the high-precise observations (up to 0.05 nT) are carried out in a several stations and geomagnetic observatory "Enhaluk".

JWS33/C/ST2/W/02-B2 Poster 1635-20

ESTIMATION OF POTENTIAL SEISMIC RISK AREAS BY GIS AND ITS ROLE IN CITY PLANNING - A CASE STUDY

Naside OZER, Demir Kolcak, Oguz Gundogdu, Yildiz Altinok (all at Department of Geophysical Engineering, Faculty of Engineering, University of Istanbul, Avcilar, 34850, Istanbul, Turkey, Email: naside@istanbul.edu.tr), Recep Cakir and S.Shelton Alexander (both at Department of Geosciences, The Pennsylvania State University, 308 Deike Building, University Park, PA 16802, USA, Email: recep@essc.psu.edu)

A Geographical Information System(GIS) is a data-based Information System that facilitates the integration and joint analysis and interpretation of almost any kinds of spatial data, including maps, aerial photographs, lines and points. It can be used for planning and design, decision making, research and archiving by the central and local governments or by individual groups.

GIS-based investigations are at a very early stage in Turkey and therefore it is necessary to carry out some pilot studies for testing purposes and to gain experince in the use of GIS methodology.

GIS applications explicitly depend on the collection of available spatial data that are relevant to the application. The initial focus for seismic risk applications should be ann important places where there exist sufficient data and information from geophysical, geological, and geodetic studies carried out through previous and ongoing national and international projects.

After conversion of the data collected to digital form, GIS utilities(ARC/INFO, ARCVIEW etc.) were used for integration and analysis of data sets to investigate different scenarios relating to hazard and risk for people and infrastructure in populated areas.

Integration of those data and preparing the scenario will offer a knowledge database for contemporary city planning and for central and local governments and private organisations to make informed decisions.

JWS33/W/20-B2 Poster 1635-21

RESTORATION OF SPACE PARTICLE DATA COLLECTIONS

Nickolay N. PAVLOV, Nickolay N. Kontor and Elmar N. Sosnovets (Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119899, Russia, email: nnpavlov@taspd.npi.msu.su)

Since 1965, Theoretical and Applied Space Physics Division, Institute of Nuclear Physics, Moscow State University carries out monitoring of charged particles in space with use of Russian far spacecraft and satellites. Significant part of the data from old missions is stored only on paper, many data sets have been saved due to special issues published by the WDC-B. The data sets from both paper and old tapes needed to be restored and transferred to the modern computer media. This work has been supported by NASA, grant NAG5-4656. Useful collaboration with NSSDC has also made this project realisable.

Assuming that similar projects are being currently launched by many research groups for the sake of utilisation of the benefits of the new Internet era we would like to share our experience in typical problems, common approaches and software tools used in our work. The main goal is to make the collection living and publicly accessible via Internet. Such issues as data input, data formats, file structure, use of database system, IDL, Java are concerned here. Interactive graphic rectification of raw data sets and creation of the proper documentation are highlighted as the most important for the solving of a key problem of data quality. A simple method of improving the ability of navigation within a multi-spacecraft data collection based on a plain ftp is discussed as well as our approaches to the effective graphic access to the data. Attaching of some simple tools for remote data analysis to the user interface is also considered as a way to make the services more attractive and useful.

JWS33/W/27-B2 Poster 1635-22

DATA COLLECTION, PROCESSING AND DISTRIBUTION FOR THE NASA TIMED MISSION’S GLOBAL ULTRAVIOLET IMAGER (GUVI)

Larry J. PAXTON (240 228 6871; larry.paxton@jhuapl.edu); Michele Weiss (240 228 4806; michele.weiss@jhuapl.edu); Rob Barnes (240 228 8134; robin.barnes@jhuapl.edu); Sanae Kubota (240 228 8404; sanae.kubota@jhuapl.edu); Rosalyn Pham (240 228 8587; rosalyn.pham@jhuapl.edu); Ching-I. Meng (240 228 5409; ching.meng@jhuapl.edu) At The Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Rd., Laurel, MD 20723, United States; Andrew Christensen (310 336 7084; Andrew.B.Christensen@aero.org) The Aerospace Corporation Space and Environment Technology Center P.O. Box 92957 Los Angeles, CA 90009

The Global Ultraviolet Imager (GUVI) is one of four instruments that on the NASA Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) spacecraft, the first mission of the NASA Solar Connections program. TIMED, which is scheduled for a May 18, 2000 launch, will be used to study the energetics and dynamics of the mesosphere and lower thermosphere. The focus of the TIMED mission is the processes occurring between altitudes of 60 to 180 kilometers. The other instruments that are a part of the TIMED mission are the Solar EUV Experiment (SEE), the TIMED Doppler Interferometer (TIDI), and SABER (Sounding of the Atmosphere Using Broadband Emission Radiometry). GUVI is a far-ultraviolet (115 to 180 nm) scanning imaging spectrograph that provides horizon-to-horizon images in five selectable wavelength intervals or "colors." These colors (HI 121.6 nm, OI 130.4 nm, OI 135.6 nm, and N2 Lyman-Birge-Hopfield bands 140 to 150 nm and 165 to 180 nm) are chosen in order to produce the GUVI key parameters. These key parameters are produced on a routine basis and will be available via the internet. GUVI supports the TIMED science objectives and will:

1) Determine the spatial and temporal variations of constituent number densities and temperature in the thermosphere.

2) Determine the relative importance of auroral inputs, Joule heating, and solar EUV for the thermal structure of the lower thermosphere.

Each day GUVI produces 88 MB of raw data which must be processed, vetted, and available for distribution within a day of receipt. This requires the introduction of a rather large amount of software capable of automated processing (about 100,000 lines). In addition there is a graphical user interface, written in Java, that allows users to browse and manipulate the data products locallly or over the Internet. GUVI data products and graphical user interface are available at: http://sd-www.jhuapl.edu/TIMED/GUVI/ and http://www.aero.org/GUVI/ . These sites document the GUVI project and provide details of the instrument and are the means for accessing the data.

These activities will be demonstrated and discussed.

JWS33/E/02-B2 Poster 1635-23

DESIGN AND OPERATION OF GEOSCIENTIFIC CLEARINGHOUSES AT THE GFZ POTSDAM

Bernd RITSCHEL (GFZ Potsdam, Data and Computing Center, 14473 Potsdam, Telegrafenberg A3, email: rit@gfz-potsdam.de)

The usage of clearinghouse techniques are a state of the art way to disseminate the digital geoscientic data as well as the information or metadata about the data. A geoscientific clearinghouse consists of a relational database server, a web server and application software for retrieval, presentation and download of data. The client side only needs an internet browser to get access to the clearinghouse features. Metadata are necessary for the operation of clearinghouses. Often the relationships between data and belonging metadata are lost or the metadata itself don't exist. To create form the start a scientific product always as set of a data and a metadata file is an easy way to keep together both digital data and metadata. The product metadata existing as extended DIF documents will be extracted and pumped into a relational database as well as stored as text files together with the data files in a product archive. The extended DIF file contains all attributes are necessary for an aimed und successful geoscientific product retrieval. For the connection of different clearinghouses Z39.50 interfaces and servers are used.

JWS33/W/04-B2 Poster 1635-24

DATABASE OF THE PACIFIC LITHOSPHERE DIGITAL MODELS FROM GEOTRAVERSES

A.G. RODNIKOV, N.A.Sergeeva, M.V.Rodkin, L.P.Zabarinskaya (Geophysical Center, Russian Academy of the Sciences, Molodezhnaya 3, 117296 Moscow, Russia, email: rodnikov@wdcb.rssi.ru); (P.A.Stroev Sternberg State Astronomical Institute, Moscow State University, 117296 Moscow, Russia); V.A.Rashidov(Institute of volcanic geology and geochemistry, Petropavlovsk-Kamchatski, Russia)

Within the framework of the Geotraverse Project, a geological/geophysical deep-cross sections of the lithosphere and asthenosphere in the transition zone from Asian continent to the Pacific Ocean has been constructed. A set of bathymetric, magnetic, gravity and geological maps of the area has been made also. The purpose of the research is to study the deep structure of the region having in mind it’s connection with formation of sedimentary basins, seismic zones, and sea bottom minerageny. Primary geological and geophysical data were collected. The database includes now bathymetric data, gravimetric and magnetic surveys data, heat flow measurements, deep seismic sounding data, catalog of earthquakes, information about magnetic linear anomalies and faults, data on deep structure of the lithosphere and asthenosphere, geological and geophysical data from sea bottom boreholes, and data on sea bottom minerageny. AutoCAD-14 was used for digitizing of graphic images and Surfer32 was used for maps compiling from the primary data. Address of our homepage in Internet is http:/www.wdcb.rssi.ru/GCRAS/traverse.html. The database will include the Okhotsk Sea Geotraverse, the Japan Sea Geotraverse and the Philippine Sea Geotraverse. Now the data on the Philippine Sea Geotraverse and a few maps of the area are presented in Internet only. The Project is sponsored by Russian Foundation for Basic Researches, grant N 98-07-90201.

JSW33/W/32-B2 Poster 1635-25

AN ON-LINE ACCESS SYSTEM FOR THE TRMM DATA

Hualan RUI (Distributed Active Archive Center, NASA/Goddard Space Flight Center, Greenbelt, MD 20770, email: rui@daac.gsfc.nasa.gov)

The Tropical Rainfall Measuring Mission (TRMM), jointly sponsored by the National Aeronautics and Space Administration (NASA) of United States and the National Space Development Agency (NASDA) of Japan, provides visible, infrared, and microwave observations of tropical and subtropical rain system. TRMM satellite was launched on November 27, 1997(EST). Data from TRMM are being archived, processed, and disseminated by Distributed Active Archive Center (DAAC) at the Goddard Space Flight Center (GSFC) of NASA. An online system or user interface is designed for easy, friendly, and quick display and access of the TRMM data. Components, features, and limitations of the system will be demonstrated. The TRMM standard products and variety of the subsets will be shown and their availability will be discussed.

JWS33/W/08-B2 Poster 1635-26

INTERACTIVE POTENTIAL FIELD MODELLING AND INTEGRATION OF CONSTRAINING DATA BY IOGIS

S. SCHMIDT and H.-J. Goetze (FU Berlin, Institut fuer Geologie, Geophysik und Geoinformatik, Malteserstr. 74-100, D-12249 Berlin, Germany, email: sabine@geophysik.fu-berlin.de); R. Seidemann and A. Siehl (University Bonn, Geologisches Institut, Nussallee 8, D-53115 Bonn); A.B. Cremers, M. Breunig and S. Shumilov (University Bonn, Roemerstr. 164, D-53117 Bonn)

Three-dimensional (3-D) interactive modelling permits an integrated processing and interpretation of geoid, gravity and magnetic fields, yielding an improved geological interpretation. Generally these 3-D models are constructed by triangulated polyhedra with constant density and/or induced and remanent susceptibility. Interactive modifications of model parameters (model coordinates, rock density and susceptibility), access to the numerical modelling process and direct visualization of both, calculated and measured fields of gravity and magnetics, enable the interpreter to design the model as realistic as possible. An approach is described to integrate constraining data into the interactive modelling process by means of visualization and combination of independent data and information together with the density/susceptibility model. This visual combination of 2- and 3-D models (e.g. from seismic reflection or refraction surveys) enables a quantitative comparison and adjustment by the interpreter, and results in a model comprising as much independently derived information as possible. The definition of 'geo-objects', which link geoscientific vocabulary with geometrical elements of the model, provides a comfort environment for interpretations. The modelling method is embedded in an Interoperable Geoinformation System (IOGIS) which uses new object-oriented database management technique. As an example we show results from the southern Northwest German Basin.

JWS33/W/18-B2 Poster 1635-27

DEKORP’S SEISMIC DATA IN THE INTERNET

Christian SEEGRAEF, (Lutz Lesch GeoForschungsZentrum Potsdam, email: seegraef@gfz-potsdam.)

At the GFZ Potsdam a working group was established in 1998 to prepare, archive, and protect seismic data sets, which were originally recorded on common _ inch magnetic tapes, on modern storage media and provide them to the public and scientific community. This is achieved by the establishment of an online-available database. Seismic data in different processing stages (from the field tape to the final line-drawing) will be available for all collected surveys in trace as well as in graphical format together with related information such as coordinate tables, maps, geological interpretations, etc. Final results, such as migrated, depth-converted sections or line-drawings, are kept on a FTP-server for interested users. In addition a possibility should be managed to command data records online and receive them in the form of a CD-ROM. The prime aim is to provide a catalogue-like structure with download-facility using the modern information technologies that are or will be available in the near future.

JWS33/E/15-B2 Poster 1635-28

GIS-BASED ANALYSIS FOR GEOPHYSICAL EXPLORATIONS: IMPROVING POSITIONAL AND ATTRIBUTE DATA MANAGEMENT

SHYLLON E. A., Olaleye J. B and Olunloyo V. O. S (Geoinformatics Laboratory, Faculty of Engineering, University of Lagos, Lagos, Nigeria.)

In a geophysical exploration, the position and attribute of subsurface features are defined using Two-Way-Travel (TWT) time(s) which are interpreted from 3D & 4D reflection seismology or other techniques such as refraction seismology, magnetic, gravity, etc. As a consequence, data management becomes a major task. Then faster means of analyzing and integrating the data sets, and presenting the results are required. A GIS is the means of achieving this for all geospatial data.

The GIS database takes a great variety of explorations geophysical data. In this paper, they are categorized and of many types. The categories distinguish seismic lines and shot points, Magnetic (Geomagnetism and Aeromagnetism), gravity, well log, etc. The data types distinguish such as stratified points samples, interpolated surfaces, etc.

The exploration geophysical data require careful preparation before input into the GIS database. This paper will treat advance data structuring technique of such complex data with position and highly dynamic attributes.It will discuss georeferencing of exploration geophysical data to the Earth system of coordinates; which must be accurate particularly if the results of international and national geophysical observations are to be integrated.

This GIS-based-analysis is a faster means of analyzing these data sets from various sources, and presentation of results to international and national geophysical communities.

JWS33/W/19-B2 Poster 1635-29

A SPACEBASED OCEAN SURFACE EXCHANGE DATA ANALYSIS SYSTEM

Wenqing TANG and W. Timothy Liu (Jet Propulsion Laboratory, Caltech,

email: wqt@pacific.jpl.nasa.gov)

Emerging technologies have provided unprecedented opportunities to transform information into knowledge and disseminate them in a much faster, cheaper, and user-friendly mode. We have set up a system to produce and disseminate high level (gridded) ocean surface wind data from the NASA Scatterometer and European Remote Sensing missions. The data system is being expanded to produce real-time gridded ocean surface winds from an improved sensor SeaWinds on the Quikscat Mission. The wind field will be combined with hydrologic parameters from the Tropical Rain Measuring Mission to monitor evolving weather systems and natural hazard in real time. It will form the basis for spacebased Ocean Surface Exchange Data Analysis System (SOSEDAS) which will include the production of ocean surface momentum, heat, and water fluxes needed for interdisciplinary studies of ocean-atmosphere interaction.

Various commercial or non-commercial software tools have been compared and selected in terms of their ability in database management, remote data accessing, graphical interface, data quality, storage needs and transfer speed, etc. Issues regarding system security and user authentication, distributed data archiving and accessing, strategy to compress large-volume geophysical and satellite data/image. and increasing transferring speed are being addressed. A simple and easy way to access information and derive knowledge from spacebased data of multiple missions is being provided. The evolving 'knowledge system' will provide relevant infrastructure to address Earth SystemScience, make inroads in educating an informed populace, and illuminate decision and policy making.

JWS33/E/12-B2 Poster 1635-30

GEOPHYSICAL METADATA SYSTEM OF SLOVENIA

Bojan URAN (Geophysical Survey of Slovenia, Kersnikova 3, 1000 Ljubljana, Slovenia, email: bojan.uran@gov.si); Marjeta Car and Robert Stopar (Institute for Geology, Geotechnics and Geophysics, Dimi eva 14, 1000 Ljubljana, Slovenia, email: mcar@i-ggg.si, rstopar@i-ggg.si)

Geophysical investigations in Slovenia have a long tradition, but until recently we have not got a systematic overview on them. We started to collect data about geophysical investigations in Slovenia from different sources and organised them in a metadata system. The structure of the metadata follows European draft standard for georefered data, so it is easy to combine and correlate our data with geodetic and geologic data as separate layers inside the GIS system. The role of metadata is very important if we want to join data from different sources. It contains basic information of the dataset, its quality and availability. We added also data about geophysical methodology used, aim and scope of the investigations, investor(s), site location, keywords, accessibility of data, short abstract of the results etc. A lot of work and special attention has been paid to critical evaluation of the quality of the observed data and to the harmonised and consistent keyword system. The role of the latter is the possibility of quick and effective searching of data. Additionally, the gravity, geomagnetic, geothermal and geoelectrical resistivity maps have been added. The organisation of information system allows us to use for different purposes. On one hand, it as a metadata system with public access over the Internet. It uses three tier architecture, connecting user with web browser to WWW and database server. On the other hand, it is a full database system, including also raw data, for storage, processing and presentation of data with the GIS tools in an intranet inside the institution.

JWS33/W/24-B2 Poster 1635-31

EVIDENCE FOR MULTIFRACTAL SCALING FROM GEOMAGNETIC DATA

Zoltan VOROS (Geophysical Institute SAS, Komarnanska, 947 01 Hurbanovo, Slovak Republik, email: geomag@geomag.sk); Peter Kovacs and Arpad Juhasz (Eotvos Lorand Geophysical Institute, Budapest, Columbus u. 17-23, Hungary, email: kovacs@elgi.hu)

The question of the higher order statistical analysis of geomagnetic data is propounded. Evidences for multifractal scaling laws describing scale-invariant statistical properties of "geomagnetic turbulence" are presented. The multifractal probability measure constructed from geomagnetic data proved to be singular and distributed on fractal support. The existence of multifractal structure in geomagnetic data is the signature of nonhomogeneous, intermittent energy transfer within the solar wind - magnetosphere - ionosphere system.

JWS33/W/33-B2 Poster 1635-32

POLAR PATHFINDER DATA SAMPLER: NEW DATA FORMATS FOR INTEGRATIVE SCIENCE

Ronald L. S. WEAVER, L Cheshire, R Hauser, M Meshek, M Marquis, and A Varani, (National Snow and Ice Data Center [NSIDC], CIRES, Campus Box 449, University of Colorado Boulder, Colorado, 80309); Siri Jodha Singh Khalsa, (Steven Myers and Associates, Space Science and Engineering Division, 9315 Largo Drive West, Largo, MD, 20774)

Impediments to the cross-disciplinary use of remote sensing data are the complexities of data formats, lack of common geographic and temporal referencing systems, and consistent timeseries over the course of a sensor's lifetime. In order to break down some of these barriers specifically found in polar-related remote sensing data, the NOAA-NASA Polar Pathfinder research teams, in conjunction with NSIDC staff embarked on an effort to integrate selected polar remote sensing data. It is a unique effort to provide data sets, which lower the cross-sensor use barriers due to differing geo-referencing, sensor resolution, and temporal schemes.

These data have been packaged on a CD-ROM, which contains selected animations for previewing large-scale atmospheric and surface condition changes. NSIDC has also produced a data access and browse tool based on the commercial off the shelf (COTS) product IDL.

JWS33/W/35-B2 Poster 1635-33

THE BRITISH ATMOSPHERIC DATA CENTRE: DATA FOR UK ATMOSPHERIC SCIENCE

Simon WILLIAMS and Lesley Gray (British Atmospheric Data Centre, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, UK, email: s.r.williams@rl.ac.uk)

This poster describes data services provided by the British Atmospheric Data Centre (BADC) to the atmospheric science community. We use the example of the support given to atmospheric chemists working on the UK ACSOE (Atmospheric Chemistry Studies in the Oceanic Environment) programme to illustrate the BADC's work. The BADC is the main archive for atmospheric data produced by the UK academic community, but it also holds over 1Tb of 3rd party data sets, such as observational and model data from the Met Office and the European Centre for Medium Range Weather Forecasts (ECMWF). Researchers use our WWW site to find data and then simply copy them over the Internet to their own computers. ACSOE is a research programme of the Natural Environment Research Council, which is working to improve the understanding of the marine atmosphere. Measurements have been made from a remote research station on the west coast of Ireland and from ships and aircraft offshore. The BADC has been actively involved since the outset of the programme and the poster gives an outline of the automatic archive and catalogue system provided by the BADC, which allows the ACSOE researchers to deposit their data and share them efficiently with collaborating groups. It also describes the forecast air parcel trajectories provided to ACSOE through the BADC which researchers found an invaluable aid in planning their measurements. The BADC is funded by the Natural Environment Research Council.

Wednesday 28 July AM

Presiding Chair: V Gitis (Institute for Information Transmission Problems,

RAS, Moscow, Russia)

extended poster veiwing 0900-1200