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

Hideaki Nakajima; Akihiko Kuze; Takafumi Sugita; Tatsuya Yokota; Yasuhiro Sasano

doi:10.1117/12.416955

21 February 2001 Solar-occultation FTS for inclined-orbit satellite (SOFIS): scientific requirements and current status of development

Hideaki Nakajima, Akihiko Kuze, Takafumi Sugita, Tatsuya Yokota, Yasuhiro Sasano

Author Affiliations +

Proceedings Volume 4150, Optical Remote Sensing of the Atmosphere and Clouds II; (2001) https://doi.org/10.1117/12.416955
Event: Second International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 2000, Sendai, Japan

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.

Citation Download Citation

Hideaki Nakajima, Akihiko Kuze, Takafumi Sugita, Tatsuya Yokota, and Yasuhiro Sasano "Solar-occultation FTS for inclined-orbit satellite (SOFIS): scientific requirements and current status of development", Proc. SPIE 4150, Optical Remote Sensing of the Atmosphere and Clouds II, (21 February 2001); https://doi.org/10.1117/12.416955

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