Abstract
Airborne Multi-Spectral Scanner (AMSS) is an airborne whiskbroom sensor having 25 spectral channels similar to those of Global Imager (GLI) on ADEOS-II satellite. The radiometric calibration coefficients for the visible and near-infrared channels are determined by observing an integrating sphere on the ground just before the flight. The absolute input spectrum of the integrating sphere was precisely measured at Tsukuba Space Center. During the ground-based calibration experiments, we found the temperature dependence of the output digital number of AMSS possibly due to the detector sensitivity variations. In February 2001, we had a field campaign around Saroma Lake, Hokkaido. The surface albedo of icy surface of Saroma Lake and various atmospheric parameters were measured simultaneously with the overpass of AMSS. Based on the standard procedure of vicarious calibrations and careful monitor of the detector temperature, we checked the in-flight radiometric performance of AMSS. The errors in the radiometric calibration coefficients are estimated to be smaller than 5 percent except channel 1.
