「だいち」搭載光学センサ(PRISM, AVNIR-2)の校正検証の初期結果

摘要

The Advanced Land Observing Satellite (ALOS) was successfully launched on January 24, 2006. This paper introducesthe preliminary results of calibration and validation for two ALOS optical sensors, the Panchromatic Remote-sensingInstrument for Stereo Mapping (PRISM) and the Advanced Visible and Near-Infrared Radiometer type-2 (AVNIR-2).PRISM consists of three independent panchromatic radiometers and is used to derive a digital surface model (DSM) withhigh spatial resolution, which is an objective of the ALOS mission. Thus, geometric calibration is important ingenerating a highly accurate DSM with stereo pair images of PRISM. Radiometric calibration is also important forAVNIR-2. Relative radiometric calibration is carrying out using acquired images over homogeneous targets such asocean, deserts, and ice and snow areas, and nighttime observation. The absolute radiometric calibration is applied withthe cross-calibration method using calibrated satellite images (e.g. MODIS, ASTER, and SPOT-5).