8 April 2003 ASTER on-board calibration status
Author Affiliations +
ASTER is a high-resolution optical sensor for observing the Earth on the Terra satellite. ASTER consists of three radiometers, VNIR in the visible and near-infrared region, SWIR in the shortwave infrared region, and TIR in the thermal infrared region. The pre-flight calibration of VNIR and SWIR adopted the working standard large integrating sphere whose radiance levels were traceable to the primary standard fixed-point blackbody. The on-board calibration devices of VNIR and SWIR were two halogen lamps and photodiode monitors. The on-board lamp calibration showed a little shift while launch. In orbit three bands of VNIR showed a rapid decrease in the output signal while all SWIR bands remained stable. The TIR on-board blackbody was calibrated against a standard blackbody from 100 K to 400 K in a vacuum chamber before launch. The TIR is unable to see the dark space. The temperature of the on-board blackbody of 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 just after launch seemed consistent with the prelaunch calibration but showed a decrease in orbit.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fumihiro Sakuma, Fumihiro Sakuma, Akira Ono, Akira Ono, Masahiko Kudoh, Masahiko Kudoh, Hitomi Inada, Hitomi Inada, Shigeki Akagi, Shigeki Akagi, Hirokazu Ohmae, Hirokazu Ohmae, } "ASTER on-board calibration status", Proc. SPIE 4881, Sensors, Systems, and Next-Generation Satellites VI, (8 April 2003); doi: 10.1117/12.468217; https://doi.org/10.1117/12.468217


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