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Proceedings Paper

Status of the GCOM-W and onboard AMSR follow-on instrument
Author(s): Keiji Imaoka; Akira Shibata; Misako Kachi; Marehito Kasahara; Yukiei Iida; Kazuhiro Tanaka; Toshiyoshi Kimura; Yoshio Tange; Haruhisa Shimoda
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Paper Abstract

One of the series of satellite for the Global Change Observation Mission (GCOM) is the GCOM-W that will carry the Advanced Microwave Scanning Radiometer (AMSR) follow-on instrument. To keep the continuous observation by the current AMSR for the EOS (AMSR-E) on the Aqua satellite, an earliest launch date is desired. Current proposed launch year is 2010 in Japanese fiscal year. The AMSR-E instrument has been successfully operated for about 4-years and expected to continue providing measurements with high-spatial resolution and in C-band channels that are used to estimate all-weather sea surface temperature and land surface soil moisture. The total dataset period will be over 20-years if the AMSR-E observation can last until the GCOM-W launch. Among the GCOM mission objectives, GCOM-W will focus on the long-term observation of variations in water and energy circulation. In addition, further practical uses including numerical weather forecasting, maritime and meteorological monitoring, and ice applications will be promoted. The AMSR follow-on instrument will be a six-frequency, dual polarized passive microwave radiometer system to observe water-related geophysical parameters. It takes over the basic sensor concept of the AMSR-E instrument with some essential improvements on the calibration system and mitigation of radio-frequency interference (RFI) in C-band channels. Regarding the calibration system, some issues particularly for the warm load target will be investigated and improved based on the AMSR and AMSR-E experiences. Although mitigating the RFI problem is a difficult issue, some preliminary aircraft measurements of anthropogenic radio emissions have performed in Japan and used for assessing the possibilities of sub-band configuration in C-band. Prototyping the several critical components including the above has already started in the last Japanese fiscal year.

Paper Details

Date Published: 3 October 2006
PDF: 8 pages
Proc. SPIE 6361, Sensors, Systems, and Next-Generation Satellites X, 636105 (3 October 2006); doi: 10.1117/12.690101
Show Author Affiliations
Keiji Imaoka, Japan Aerospace Exploration Agency (Japan)
Akira Shibata, Japan Aerospace Exploration Agency (Japan)
Misako Kachi, Japan Aerospace Exploration Agency (Japan)
Marehito Kasahara, Japan Aerospace Exploration Agency (Japan)
Yukiei Iida, Japan Aerospace Exploration Agency (Japan)
Kazuhiro Tanaka, Japan Aerospace Exploration Agency (Japan)
Toshiyoshi Kimura, Japan Aerospace Exploration Agency (Japan)
Yoshio Tange, Japan Aerospace Exploration Agency (Japan)
Haruhisa Shimoda, Japan Aerospace Exploration Agency (Japan)
Tokai Univ. Research and Information Ctr. (Japan)

Published in SPIE Proceedings Vol. 6361:
Sensors, Systems, and Next-Generation Satellites X
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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