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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2024, Vol. 21, No. 4, pp. 72-84

ODS instrument of ExoMars-2022 project: Structure, main characteristics and results of laboratory calibrations

V.S. Khorkin 1, 2 , Yu.S. Dobrolenskiy 1 , O.I. Korablev 1 , N.A. Vyazovetskiy 1 , I.A. Dzyuban 1 , A.Yu Titov 1 , A.A. Fedorova 1 , A.G. Sapgir 1 , D. Toledo 3 , J.-P. Pommereau 4 , P. Rannou 3 
1 Space Research Institute RAS, Moscow, Russia
2 Lomonosov Moscow State University, Moscow, Russia
3 Instituto Nacional de Técnica Aerospacial, Madrid, Spain
4 LATMOS, l’Université de Versailles Saint-Quentin-en-Yvelines, Guyancourt, France
Accepted: 08.07.2024
DOI: 10.21046/2070-7401-2024-21-4-72-84
The paper presents the ODS (Optical Depth Sensor) instrument developed at the Institute of Space Research of the Russian Academy of Sciences for the ExoMars-2022 project. Designed for long-term operation on the surface of Mars, ODS shall provide daily measurements of optical thickness of dust and condensation aerosol in the planet’s atmosphere from the illumination of its surface. To participate in the ExoMars-2022 project, the ODS instrument was upgraded and underwent a full cycle of ground testing. The paper describes the instrument design, its optical scheme and the spectral characteristics of two optical channels. The paper also considers the parameters of the temperature sensor incorporated in the instrument. The results of laboratory calibrations of the device parameters such as field of view, spectral characteristics and calibration of the ODS temperature sensor are given. In the experiment it is found that the instrument has spectral transmittance in the range of 350–450 and 740–1030 nm, the field of view of the instrument is from 18 to 33° and from 35 to 45° in zenith angle. The instrument has been tested in the temperature range –40 to +40 °C.
Keywords: ExoMars-2022, atmosphere optical depth, field of view, calibrations
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