Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [WP-5 LARGE SHARED DATABASES]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: DEVELOPMENT OF THE DATA AND INFORMATION SYSTEM FOR THE EARTH OBSERVING SYSTEM (EOS). E. G. Njoku, G. W. Hunolt, G. H. Ludwig, T. T. Taylor

Document type:: Multivolume work

Structure type:: Chapter

ment data). Routine processing of EOS data to level two (swath-oriented geophysical products) and above will be done according to science requirements developed or approved by the IWG. Data from foreign instruments on NASA platforms will be transmitted to ground via TDRSS, pro cessed to level zero, and made available for pick-up by the foreign agency. Likewise, data from NASA instruments on foreign platforms will be downlinked by the foreign agency, processed by them to level zero, and made available for pick-up by NASA for further processing in EOSDIS. Raw data from NASA prototype opera tional instruments will be made available to NOAA for pick-up at the TDRSS White Sands Ground Station. Plans are also in progress to develop an X-band direct downlink capability for the NASA platforms in addition to the primary TDRSS downlink. This direct downlink system will pro vide the capability for transmitting a pre selected EOS data stream in real-time to receiving stations worldwide in support of field experiments, real-time needs, and special international requirements. The data rate capacity (between 10 to 100 Mbps) and other operating characteristics of this system are still under consideration. 4.2 Data Policy and User Access EOS data and products generated in EOSDIS will be made available immediately upon acquisition and processing to all users. There will be no period of exclusive access. EOSDIS will provide the capability for archiving and making avail able all standard science data products, models, algorithms, and documentation produced by EOS investigations. In addition, all data products derived from EOS data upon which referreed arti cles are based, including associated models, algorithms and documentation, will be made available for archival in EOSDIS. Under current policy it is envisaged that there will be three basic categories of EOS data users: research users (including U.S. government sponsored and other research users); operational agency users (e.g. NOAA); and others (primarily commercial users). Specific policies for access to EOS data are still under negotiation, and may be for some time, however the following defini tions and arrangements are currently planned: (1) Research users are those who agree to pay the nominal incremental costs to the EOS project of reproducing and delivering the data requested, and who agree to sign a "research agreement" that: they will publish in the open literature results of research based in whole or in part on data obtained from EOS including derived data sets and the algorithms and models used; they will provide a copy of such results to the distributing agency at the time these re sults are published in the open literature; the data seta are for the researcher's use and for bona-fide research purposes only; and the data will not be reproduced or distributed to any other parties without the other parties agreeing to the same conditions. Research users will in clude those affiliated with EOS participating countries (i.e. US, ESA member states, Japan, Canada, and any country which the ICWG agrees should have special privileges in exchange for some contribution "in kind", such as countries participating in complementary in situ studies and agreeing to open exchange of data) . Users from other countries, whether researchers or not, will have access to EOS data but on commer cial terms. (2) Operational agency users (e.g. NOAA, EUMETSAT) will obtain real-time access to data from instruments of interest through their own direct readout facilities and/or via national agency data relay satellites. NOAA will perform its own data processing and will maintain its own archive for these data. Non- real-time access to EOS research data will be provided by EOSDIS at the incremental cost of reproduction and delivery and will be subject to the terms of the research agreement. (3) NASA will develop a procedure, consistent with the Land Remote Sensing Commercialization Act or other applicable statutes, for commercial distribution on a non-discriminatory basis to non-research/non-operational users. 5 IMPLEMENTATION APPROACH Development of EOSDIS is managed by the EOS pro ject at the Goddard Space Flight Center. Two parallel Phase B studies have recently been com pleted (April 1990) with industry teams led by TRW and Hughes Aircraft Company. These studies resulted in detailed-level requirements and pro posed architectures and designs for EOSDIS. The results are currently being integrated and a request for proposals will shortly be issued (-Spring, 1991) for the Phase C/D final design and development (contract award -mid-1992). The IWG Science Advisory Panel for EOS Data and Information has met several times during the past year to review the progress of EOSDIS development. In their reports the panel has stressed the need for an EOSDIS implementation approach that provides continuity with present systems, an evolving design and architecture, and perhaps most importantly the need for par ticipation of scientists in EOSDIS development. EOS data will provide a continuation of existing measurements some of which currently extend for more than a decade. Thus, work is beginning now to involve scientists in the development of cur rent and historical "pathfinder" data sets, so that the EOS community can gain experience in data processing (or reprocessing) , archiving, and distribution in the mode anticipated for the EOS era. Examples of such pathfinder activi ties, underway or planned, include the process ing of data from ERBE (Earth radiation budget), CZCS (global ocean chlorophyll), SSM/I (sea ice, hydrology), TOMS (ozone), AVHRR (sea surface temperature and vegetation index), ISCCP (cloud climatology), GOES (cloud winds), and TOVS (atmospheric profiles). NASA plans to increase the number of these activities in the coming years, under EOSDIS auspices, in order to gain experience in prototyping the EOSDIS DAAC design and operations. Precursor missions to EOS will offer special op portunities to put in place and test the infras tructure and standards that will be required for EOSDIS. In addition, NASA has under development a number of cataloging, archiving, and distribu tion systems such as the NASA Ocean Data System, NASA Climate Data System, Pilot Land Data System, SAR Data Catalog System, Alaskan SAR Facility, NASA Master Directory, and others, which serve to manage many of the current NASA Earth science data sets. NASA is also cooperat ing actively with agencies such as NOAA, the U.S. Geological Survey, the European Space Agency, and others to prototype data exchange formats, software and documentation standards, and electronic network connections for science user access. EOSDIS will provide a focus for integrating these activities and incorporating the successful elements into the EOSDIS design. It is essential that EOSDIS be designed with an open system of standards and protocols for all functions. This is necessary to enable modular growth and upgrades of EOSDIS during the mission and to facilitate software portability and data interchange between investigators and with EOSDIS. Emphasis will be placed by EOSDIS on working with existing international standards organizations, such as the American National Standards Institute (ANSI), the Committee on Earth Observations Satellites (CEOS), the Consultative Committee on Space Data Standards 490

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