Introduction of SOFIS/FTS calibration system

Takahiro Kawashima; Shigetaka Mori; Jun Tanii; Yasuhiro Sasano; Hideaki Nakajima; Tatsuya Yokota; Takafumi Sugita; Akihiko Kuze; Katsunori Waragai

doi:10.1117/12.451369

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18 December 2002 Introduction of SOFIS/FTS calibration system

Takahiro Kawashima, Shigetaka Mori, Jun Tanii, Yasuhiro Sasano, Hideaki Nakajima, Tatsuya Yokota, Takafumi Sugita, Akihiko Kuze, Katsunori Waragai

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Proceedings Volume 4818, Infrared Spaceborne Remote Sensing X; (2002) https://doi.org/10.1117/12.451369
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

The Solar Occultation FTS for Inclined-orbit Satellite (SOFIS) is a solar occultation Fourier transform spectrometer (FTS), developed by the Ministry of the Environment (MOE) of Japan, that will be onboard the Global Change Observation Mission-A1 (GCOM-A1) satellite. GCOM-A1 will be placed in a 650km non-sun-synchronous orbit, with an inclination angle of 68 deg. SOFIS is the successor of ILAS-II, which will be onboard the Advanced Earth Observing Satellite-II (ADEOS-II). SOFIS measures atmospheric constituent vertical profiles with 0.24 cm^-1spectral resolution in 3-13 μm and 1 km vertical resolution. SOFIS will measure the global distribution of O₃, HNO₃, NO₂, N₂O, CH₄, H₂O, CO₂, CFC-11, CFC-12, CIONO₂, aerosol extinction, atmospheric pressure, and temperature. SOFIS uses a double-pass dual-pendulum type FTS with diode laser sampling system to reduce the size and weight. Two photo-voltaic (PV) MCT (HgCdTe) detectors and a pulse-tube cooler will achieve high linearity and low-noise performance. In addition, it has a visible (O₂, A band) grating spectrometer for pressure and temperature retrieval and a sun-edge sensor for the tangent height position detection. We present the test results of FTS and detector assembly engineering model and describe the SOFIS/FTS calibration system.

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Takahiro Kawashima, Shigetaka Mori, Jun Tanii, Yasuhiro Sasano, Hideaki Nakajima, Tatsuya Yokota, Takafumi Sugita, Akihiko Kuze, and Katsunori Waragai "Introduction of SOFIS/FTS calibration system", Proc. SPIE 4818, Infrared Spaceborne Remote Sensing X, (18 December 2002); https://doi.org/10.1117/12.451369

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