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Proceedings Paper

Solar-occultation FTS for inclined-orbit satellite (SOFIS): scientific requirements and current status of development
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Paper Abstract

The Solar Occultation FTS for Inclined-orbit Satellite (SOFIS) is a solar-occultation Fourier-transform spectrometer developed by the Environment Agency of Japan (EA). SOFIS onboard the Global Change Observation Mission-Al (GCOM-Al) satellite will be put into a 650 km non-sun-synchronous orbit with an inclination angle of 69 deg. GCOM-Al is scheduled to be launched in spring 2006. SOFIS is the successor of the Improved Limb Atmospheric Spectrometer-II (ILAS-II), which with travel onboard the Advanced Earth Observing Satellite-II (ADEOS-II). SOFIS will measure vertical profiles of atmospheric constituents with 0.2 cm-1 spectral resolution at 3 - 13 micrometer with 1 km vertical resolution. The scientific objective of SOFIS is to measure global vertical distributions of O3, N2O, CH4, CO2, H2O, HNO3, NO2, aerosols, CFC-11, CFC-12, and ClONO2. SOFIS uses a double-pass dual-pendulum type Fourier transform spectrometer (FTS) and a diode laser sampling system to reduce the size and weight of the apparatus. Two photovoltaic (PV) HgCdTe (MCT) detectors and a pulse-tube cooler will provide high linearity and low-noise performance. SOFIS also has a visible (O2 A band) grating spectrometer for pressure and temperature retrieval and a sun- edge sensor for detecting the tangent height position. This paper describes the characteristics of SOFIS and test results of laboratory models of the FTS and the detector.

Paper Details

Date Published: 21 February 2001
PDF: 9 pages
Proc. SPIE 4150, Optical Remote Sensing of the Atmosphere and Clouds II, (21 February 2001); doi: 10.1117/12.416955
Show Author Affiliations
Hideaki Nakajima, National Institute for Environmental Studies (Japan)
Akihiko Kuze, NEC Corp. (Japan)
Takafumi Sugita, National Institute for Environmental Studies (Japan)
Tatsuya Yokota, National Institute for Environmental Studies (Japan)
Yasuhiro Sasano, National Institute for Environmental Studies (Japan)

Published in SPIE Proceedings Vol. 4150:
Optical Remote Sensing of the Atmosphere and Clouds II
Yasuhiro Sasano; Jinxue Wang; Tadahiro Hayasaka, Editor(s)

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