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Proceedings Paper

Eleven years of ASTER onboard calibration
Author(s): Fumihiro Sakuma; Masakuni Kikuchi; Nagamitsu Ohgi; 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 December1999. The ASTER consists of three radiometers. The VNIR has three bands in the visible and near-infrared region, the SWIR has six bands in the shortwave infrared region, and the TIR has five bands in the thermal infrared region. The onboard calibration devices of the VNIR and SWIR were halogen lamps and photodiode monitors. In orbit three bands of the VNIR showed a rapid decrease in the output signal. The band 1, the shortest wavelength, decreased most to 70% in eleven years. The VNIR spectra of the responsivity degradation were compared to other sensors, the JERS-1 OPS, the OCTS, the Hyperion, the MODIS, the MISR and the SPOT. The temperature of the onboard blackbody of the TIR is varied from 270 K to 340 K in the long term calibration for the offset and gain calibration. The long term calibration of the TIR showed a decrease in response after launch. The decrease was most remarkable at band 12 decreasing to 60% in eleven years. The degradation spectra of the TIR shows that the possible causes of the degradation might be silicone and hydrazine.

Paper Details

Date Published: 3 October 2011
PDF: 11 pages
Proc. SPIE 8176, Sensors, Systems, and Next-Generation Satellites XV, 81760F (3 October 2011); doi: 10.1117/12.897744
Show Author Affiliations
Fumihiro Sakuma, Japan Resources Observation System and Space Utilization Organization (Japan)
Masakuni Kikuchi, Japan Resources Observation System and Space Utilization Organization (Japan)
Nagamitsu Ohgi, Japan Resources Observation System and Space Utilization Organization (Japan)
Hitomi Inada, NEC TOSHIBA Space Systems, Ltd. (Japan)
Shigeki Akagi, Mitsubishi Electric Corp. (Japan)
Hidehiko Ono, Fujitsu Ltd. (Japan)

Published in SPIE Proceedings Vol. 8176:
Sensors, Systems, and Next-Generation Satellites XV
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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