3 October 2006 Onboard calibration status of ASTER
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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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fumihiro Sakuma, Fumihiro Sakuma, Takashi Sato, Takashi Sato, Hitomi Inada, Hitomi Inada, Shigeki Akagi, Shigeki Akagi, Hidehiko Ono, Hidehiko Ono, } "Onboard calibration status of ASTER", Proc. SPIE 6361, Sensors, Systems, and Next-Generation Satellites X, 63610W (3 October 2006); doi: 10.1117/12.687750; https://doi.org/10.1117/12.687750


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