地球観測衛星データの保存・配布システム

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Earth Remote Sensing Data Archive and Distribution System NASAEOS Earth Observing SystemASTER Advanced Spaceborne Thermal Emission and Reflection Radiometer ASTERASTER EOS ASTER DADSData Archive and Distribution Subsystem Abstract The Earth Observing System (EOS) program is an international cooperation project initiated by NASA to help solve global environmental problems. Japan's Ministry of Economy, Trade and Industry (METI) participated in the project and developed an earth-observing sensor called the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), the ASTER Ground Data System, and various ASTER processing algorithms. Fujitsu contributed to each of these ASTER developments. In this paper, we introduce the Data Archive and Distribution Subsystem (DADS), which is a subsystem that Fujitsu developed for the ASTER Ground Data System. This introduction includes a description of the subsystem's architecture. We also describe how we resolved the system performance problems that we encountered during the subsystem's development. 246 FUJITSU.52, 3, p.246-252 (05,2001)

ASTERAdvanced Spaceborne Thermal Emission and Reflection Radiometer NASA ASTER NASATerraTerra NASAEOS Earth Observing System 199912ASTER ASTER ASTER ASTER Ground Data System ASTER GDS Earth Remote Sensing Data Analysis Center ERSDAC ASTER GDSERSDAC NASA-1ASTER Terra NASA -1ASTER (1) 1A VNIR15 m SWIR30 m TIR90 m 1B / TIR VNIR SWIR VNIR 30 m SWIR 90 m TIR TIR 90 m TIR 90 m VNIR 15 m 30 m SWIR DEM XYZ 30 m DEM Z 30 m VNIR15 m SWIR30 m TIR90 m 90 m 15 m 30 m 15 m VNIRSWIRTIRASTER DEMDigital Elevation Model VNIRVisible and Near-infrared Radiometer SWIRShort Wave Infrared Radiometer TIRThermal Infrared Radiometer (1) ASTER GDS -1 Terra 人工衛星 ERSDAC ASTER GDS センサ運用計画立案 データ処理 & 保存管理 レベル 1A プロダクト レベル 1B プロダクト + 高次プロダクト - 日本 - センサ運用計画レベル0データレベル1A/1Bプロダクト利用者 ( ユーザ ) NASA レベル 0 処理 レベル 1A/1B プロダクトの保存 管理 - 米国 - -1ASTERNASAERSDAC (1) Fig.1-Collaboration of NASA and ERSDAC and role of ASTER Ground Data System. 1 FUJITSU.52, 3, (05,2001) 247

1A1B NASA 1994ASTER GDS DADSData Archive and Distribution Subsystem2000 DADS ASTER ASTER GDS-2 1 ASTER AOS ASTER Operation Segment ASTER ASTER 2 SDPS Science Data Processing Segment NASA -1 CD-ROMmm DVD 3 CSMS Communication and System Management Segment ASTER GDS DADS SDPS SDPS IMSInformation Management Subsystem DADSNASA PGSProduct Generation Subsystem ASTER SISSSoftware Implementation Support Subsystem DADSSDPS DADS DADS 1 NASA AOS ASTER 運用セグメント CSMS 通信 システム管理セグメント GSMS 地上システム管理設備 ECS EOS Core System CMS 顧客管理設備 SISS ソフトウェア開発支援設備 ADN ASTER データネットワーク設備 SDPS サイエンスデータ処理セグメント PGS プロダクト生成設備 ASTER 地上データシステム DADS データ保存 配布設備 IMS 情報管理設備 EDOS NASA EOSDIS ADN:ASTER Data Network CMS:Customer Management Subsystem EDOS:EOS Data and Operation System EOSDIS:EOS Data and Information System -2ASTER (1) Fig.2-Diagram of ASTER GDS structure. 248 FUJITSU.52, 3, (05,2001)

PDSProduction Data Set EDSExpedited Data Set DADS 2 1A 1A1B PGS 3 PGS1A 1BNASA 4 IMS 1B PGS 5 IMS CD-ROMmmDVD 6 ASTER20 DADS -3DADS 1 DADS13UNIX DADS DADS システム管理サブシステム 要求管理サブシステム 生産管理サブシステム データ保存 管理サブシステム 配布管理サブシステム -3DADS Fig.3-DADS subsystem architecture. DADS 2 ASTER GDS DADS DADS DADS 3 PGS PGS PGS 4 ASTER 500 6,000 50 G/25 G / 5 ASTERCD-ROM mmmmdat1/4 MODVD-RAM DADSDADS -4 NASA FUJITSU.52, 3, (05,2001) 249

DADS ( データ保存 配布設備 ) 要求管理サブシステム ( 通信 Gateway) 利用者 PGS ( プロダクト生成設備 ) プロダクト生産計画 生産管理サブシステム プロダクト要求 CD / MO / DVD IMS ( 情報管理設備 ) 利用者要求 元データ プロダクト データ保存 管理サブシステム 配布管理サブシステム プロダクト配布 テープライブラリ ( データストレージ ) レベル 0 データ テープ媒体 NASA EOSDIS システム管理サブシステム レベル 1 プロダクト -4DADS Fig.4-Schematic view of DADS architecture and subsystems collaboration. 1,400140 G PGSDADS PGSDADS 24 PGSDADS PGS PGS PGSDADS -5 Fig.5-Example of model structure extracted from total simulation data flow model. 250 FUJITSU.52, 3, (05,2001)

PGSDADS ithink analyst softwarehigh Performance Systems, Inc. (2)(3) ithinkpgsdads ASTER -6DADS Fig.6-Simulated DADS dynamical behavior before improvement. -7DADS Fig.7-Simulated DADS dynamical behavior after improvement. FUJITSU.52, 3, (05,2001) 251

GDS SDPS PGS/ DADS PGSCPU -5 DADS 1 2 PGSDADS DADSPGS 1 PGSDADS 2-6-7 M -6 Day 1 Day 224-7 24-7 ASTER GDS ASTER GDS 1 ASTER GDS http://www.gds.aster.ersdac.or.jp/gds_www2000/index_j.html 2 High Performance Systems, Inc. An introduction to Systems thinking ithink Analyst software V5.1.1 manual. 3 High Performance Systems, Inc. : Technical Documentation ithink Analyst software V5.1.1 manual. 252 FUJITSU.52, 3, (05,2001)

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