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Title: Radiometric and angular calibration tests for the MEDA-TIRS radiometer onboard NASA’s Mars 2020 mission
Authors: Sebastián, E.
Martínez, G.
Ramos, M.
Haenschke, F.
Ferrándiz, R.
Fernández Sampedro, M.
Keywords: IR radiometer;Spacecraft instrumentation;Radiometric and angular calibration;Calibration accuracy;Mars
Issue Date: 2-Nov-2020
Publisher: Elsevier BV
DOI: 10.1016/j.measurement.2020.107968
Published version:
Citation: Measurement 164: 107968(2020)
Abstract: This article describes a comprehensive testing method for the radiometric and angular calibration of the Thermal InfraRed Sensor (TIRS) onboard NASA’s Mars 2020 mission. First, details of the TIRS opto-mechanical design, construction aspects of the IR detectors, and an update of the mathematical model used for the calculation of sensor internal IR fluxes are provided. Then, a set of sequential calibration tests to identify the radiometer model parameters are defined. The test setups are described, highlighting their limitations and restrictions based on differences between simulated and actual Martian environmental conditions. Finally, the uncertainty sources and potential systematic errors associated with the calibration tests are quantified and compared with the radiometer scientific requirements established by the Mars 2020 science team.
Description: Highlights A new radiometric and angular calibration plan for a Martian IR radiometer. Simplified test setups and differences with Martian environmental are described. Spectral response analysis vs. radiation incidence angle and operational temperature. Performance analysis accounting for calibration uncertainties and set-up limitations. Uncertainties meet the scientific requirements stated by the Mars 2020 science team.
ISSN: 0263-2241
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