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Proceedings Paper

Onboard calibration status of ASTER
Author(s): Fumihiro Sakuma; Takashi Sato; Hitomi Inada; Shigeki Akagi; Hidehiko Ono
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Paper Abstract

The ASTER is a high-resolution optical sensor for observing the Earth on the Terra satellite launched in 1999. The ASTER consists of three radiometers, the VNIR in the visible and near-infrared region, the SWIR in the shortwave infrared region, and the TIR in the thermal infrared region. The on-board calibration devices of the VNIR and the SWIR were two halogen lamps and photodiode monitors. In orbit three bands of the VNIR showed a rapid decrease in the output signal while all SWIR bands remained stable. The TIR has one on-board blackbody and is unable to see the dark space. Therefore the temperature of the on-board blackbody of the TIR remains at 270 K in the short-term calibration for the offset calibration, and is varied from 270 K to 340 K in the long term calibration for the offset and gain calibration. The long term calibration showed a decrease of the TIR response in orbit. The radiometric calibration coefficients of the VNIR and the TIR were fit to smooth functions.

Paper Details

Date Published: 3 October 2006
PDF: 9 pages
Proc. SPIE 6361, Sensors, Systems, and Next-Generation Satellites X, 63610W (3 October 2006); doi: 10.1117/12.687750
Show Author Affiliations
Fumihiro Sakuma, National Metrology Institute of Japan/AIST (Japan)
Takashi Sato, Japan Resources Observation System and Space Utilization Organization (Japan)
Hitomi Inada, NEC TOSHIBA Space System (Japan)
Shigeki Akagi, Mitsubishi Electric Corp. (Japan)
Hidehiko Ono, Fujitsu Ltd. (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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