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31 October 2005 ASTER/TIR vicarious calibration and band emissivity measurements on frozen lake
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The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on the Terra satellite has five spectral bands (bands 10 to 14) in the thermal infrared (TIR) spectral region. In February-March 2005, we conducted a field campaign for ASTER/TIR on frozen Lake Kussharo in Japan using a multi-band radiometer (CIMEL CE312) which has five spectral bands compatible with the ASTER/TIR bands. The first purpose is to make vicarious calibration (VC) of the ASTER/TIR bands using a low-temperature target below 270 K, and the second purpose is to investigate the spectral behavior of snow/ice emissivity in the ASTER/TIR bands. The VC experiment was successfully conducted on 4 March, using the coldest target (about 262 K at the sensor) among the past VCs conducted for ASTER/TIR. The results show that the at-sensor radiances predicted by VC match the ASTER image radiances within the designed calibration accuracy (2 K for 240 to 270 K), indicating that the ASTER/TIR bands are well calibrated for the temperature range around 262 K. On the other hand, band emissivity measurements of snow and ice surfaces show that spectral emissivity changes with snow/ice conditions and with a viewing angle, particularly in bands 13 and 14 (10.2 to 11.7 μm). Finally, the surface emissivity ratio (SER) between bands 13 and 14 is shown to be useful for snow/ice monitoring, using ASTER imagery obtained in February-March 2005.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hideyuki Tonooka, Akira Watanabe, and Toshiyuki Minomo "ASTER/TIR vicarious calibration and band emissivity measurements on frozen lake", Proc. SPIE 5983, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology V, 59830X (31 October 2005);

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