Mission concept of Atmospheric Radiation Spectrometer (ATRAS): a follo-on instrument of ADEOS/IMG

摘要

ATRAS (Atmospheric Radiation Spectrometer) is a nadir-looking Fourier Transform Spect rometer, which is a followon instrumet of IMG onboard ADEOS satellite. ATRAS will have 0.05 (0.1 apodized) spectral resolution over 3-16 micron using 4 photo volatic (InSb and/or PV-MCT) detectors. Objectives of ATRAS are to demonstrate the performance of high spectral resoltuion IR sounder using FTS technique on 1) monitoring of greenhouse gases, 2) operational temperature and water vapor sounding, and 3) monitoring of earth's radiation budget. ATRAS will have much better radiometric performance compared to the IMG. It was proposed to be launched onboard a Japanese small satellite, MDS-3 (Mission Demonstration Satellite). The mission strategy and results of conceptual design study of ATRAS will be discussed.