AOTF-based spectrometer for Mars atmosphere sounding

Oleg I. Korablev; Jean-Loup Bertaux; Emmanuel Dimarellis; Alexei Grigoriev; Yurii Kalinnikov; Alexander Stepanov; S. Guibert

doi:10.1117/12.451998

18 December 2002 AOTF-based spectrometer for Mars atmosphere sounding

Oleg I. Korablev, Jean-Loup Bertaux, Emmanuel Dimarellis, Alexei Grigoriev, Yurii Kalinnikov, Alexander Stepanov, S. Guibert

Author Affiliations +

Proceedings Volume 4818, Infrared Spaceborne Remote Sensing X; (2002) https://doi.org/10.1117/12.451998
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

The SPICAM Light optical package on the ESA Mars Express mission is dedicated to the nadir, limb, solar and stellar occultation observations in the UV and NIR spectral ranges. A lightweight (~0.7 kg) near infrared channel of this instrument employs an acousto-optic tunable filter (AOTF). To our knowledge it is one of the first spectroscopic applications of the AOTF on a civilian spacecraft. A single-pixel spectrometer will sequentially measure the spectrum of reflected solar radiation from Mars between 1 and 1.7 μm with spectral resolution of 3.5 cm^-1, and spatial resolution of ~6 km from 250-km Mars Express orbit. A fiber-coupled solar entry allows profiling of the Martian atmosphere in solar occultations. A chosen configuration of the AOTF conserves both polarizations allowing therefore spectro-polarimetry measurements. The main scientific objectives of the instrument are the measurements of vapor column abundance simultaneously with ozone (measured in the UV channel) and retrieving of H₂O profiles in solar occultations. The flight model of the instrument is assembled and calibrated. Future development of the instrument including employing a multipixel linear array for cross-track mapping and extension of the spectral range is discussed.

Citation Download Citation

Oleg I. Korablev, Jean-Loup Bertaux, Emmanuel Dimarellis, Alexei Grigoriev, Yurii Kalinnikov, Alexander Stepanov, and S. Guibert "AOTF-based spectrometer for Mars atmosphere sounding", Proc. SPIE 4818, Infrared Spaceborne Remote Sensing X, (18 December 2002); https://doi.org/10.1117/12.451998

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