光と電波による地球環境計測へのIT活用事例

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1 IT IT Applications in Global Environment Observation Using Light and Radio Waves CRL Communications Research Laboratory IT 1998 IT Abstract Recently, there has been rising concern about global-scale environmental problems such as global warming, ozone-layer depletion, acid rain, and marine pollution. To understand and resolve these problems, the Communications Research Laboratory (CRL), an independent administrative corporation, has developed a remote environment-sensing system. The system uses light and radio waves to monitor the environment and uses information technology (IT) to make effective use of the environmental data it generates. The system has been in operation since 1999 and has already produced significant results. The authors have been participating in environmental studies at CRL since 1998 and have helped process global environment observation data and construct experimental systems using a high-speed network. This paper describes some applications of IT technology in global environment observation and the use of environmental data. First, we describe air quality measurements that are conducted in the Arctic region. Then, we describe the configuration and base technology of a system for measuring minor constituents of the atmosphere by using submillimeter radar from a satellite station. 530 FUJITSU.54, 6, p (11,2003)

2 IT km Communications Research LaboratoryCRL IT 1 CRL 2 SALMON System for Alaska Middle atmosphere Observation data Network 3 ( ) JEM/SMILES Japanese Experiment Module/Superconducting Submillimeter-Wave Limb Emission Sounder CRL CRL SALMON IT SALMON SALMON CRL SALMON CRL9 300 km -1 (1) -1 1 FUJITSU.54, 6, (11,2003) 531

3 IT -1 SALMON FTIR (CNA) km km km km km km km 5 40 km Super 250 km DARN HFレーダ km km km CRL APAN Asia Pacific Advanced Network CRL KDDI TransPAC vbns very high speed Backbone Network System SALMON -1 SALMON SALMON SALMON Fig.1-Outline of SALMON Network. 4 5 Web 6 11 SALMON SALMON km FUJITSU.54, 6, (11,2003)

4 IT アラスカ大学 (Fairbanks) POKER FLAT 実験場 CRL 各種観測装置 Micro-Wave 1.5 Mbps ( アラスカ大学自営回線 ) 100-BASE/T 構内 LAN 100-BASE/T 構内 LAN S-7/400U S-7/400U 2 転送 第 2 アラスカサーバ データ受信 データ中継 通信総合研究所 ( 小金井 ) QL 処理 100-BASE/T 構内 LAN GP-400S model80 Web 化 アラスカサーバ S-7/400U バックアップ装置 (DLT) インターネット Web 公開 ディスクアレイ SH850 参照要求 一般ユーザ マルチディスプレイ バックアップ装置 (DLT) S-7/400U 複合解析 データ公開 表示 日本側データサーバ ディスクアレイ SH7000 アプリケーションサーバ Web サーバ 計算結果データまたは画像 ( リアルタイム表示 ) -2 SALMON Fig.2-SALMON System configuration. CRL (2) APAN TransPAC TCP Transmission Control Protocol -2TCP 2 FTP File Transfer Protocol Solaris 2.6 OSFTP -2 OS: Solaris2.6 FTP: native (/usr/sbin/in.ftpd) TCP_xmit _hiwat Send buffer TCP_recv _hiwat Receive buffer OS: Solaris2.6 FTP: native (/bin/ftp) TCP_xmit _hiwat Send buffer TCP_recv _hiwat Receive buffer 1 8 K 8 K 8 K 8 K 2 8 K 8 K 8 K 64 K 3 16 K 16 K 16 K 64 K 1 TCP 2 TCP_recv_hiwat 8 64 K 3 TCP_xmit_hiwat TCP_recv_hiwat TCP_xmit_hiwat216 K 3 1 M1 K FUJITSU.54, 6, (11,2003) 533

5 IT FTP IP FTP TCP K FTP Web 1 FTIR FTIR Fourier Transform Infrared Spectrometer FTIR ASI ASI All-Sky Imager 180 ASI -4 a f CRL Web SALMON -3 FTIR Fig.3-Display of ozone observation data (FTIR). -4 Fig.4-Aurora and airglow images via All-Sky Imager. JEM/SMILES IT JEM/SMILES JEM/SMILES CRL 534 FUJITSU.54, 6, (11,2003)

6 IT SMILES ISS International Space Station JEM -5 SMILES3 km 3.5 km 51.6 JEM/SMILES SMILES Linux JEM/SMILES (3) JEM/SMILES-6 宇宙開発事業団提供 -5 JEM/SMILES Fig.5-Outline of JEM/SMILES observation. 擬似作成処理 true プロファイル 放射伝達のシミュレーション SMILES 内部のシミュレーション SMILES から得られる信号 地球 大気 a priori プロファイル リトリーバル処理 レベル 1 データ レベル 1 データ処理 ( 輝度温度算出処理 ) レベル 2 データ処理 ( 高度プロファイルの算出処理 ) Forward Model 放射伝達式 装置 放射輝度温度 weighting function 逆行列の計算 プロファイル 収束判定 リトリーバル結果 ( プロファイル ) -6 JEM/SMILES Fig.6-Outline of JME/SMILES Simulator. FUJITSU.54, 6, (11,2003) 535

7 IT 1 SMILES Limb SMILES 2 SMILES Limb (3) ODIN MOLIERE km 14 km JEM/SMILES SMILES -8 SMILES a b -7 Fig.7-Ozone retrieval result. 536 FUJITSU.54, 6, (11,2003)

8 IT 国際宇宙ステーション (ISS) DRTS 主として利用 JEM 米国中継衛星 TDRS 宇宙開発事業団 JEM 運用システム 国際宇宙ステーション用専用回線 NASA SMIL ES SMILES 地上システム (TKSC 内研究処理設備 ) レベル 2 レベル 0,1,2 宇宙開発事業団地球解析研究センタ 通信総合研究所 EORC レベル 3 CRL レベル 3 レベル 1 ( 媒体 ) 利用者 ブレーメン大学 ( 注 ) 米国側の経路は利用しない予定である -8 JEM/SMILES Fig.8-Overview of JEM/SMILES Ground System SMILES IT IT APAN 2 PC WS 3 4 FUJITSU.54, 6, (11,2003) 537

9 IT IT JEM/SMILES CRL ADEOS- ILAS IT Vol.48 No.2 p JEM/SMILES January FUJITSU.54, 6, (11,2003)

J I ~ ~ U F I P E N V I R O N M E N T A L T S R E P O F U R T IT Outsourcing Service Web Service System Integration Service 2002 4 12003 3 31 FUJITSU FIP ENVIRONMENTAL REPORT 2003 2003 2002 2003 IT 1 2

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