Revised Radiative Response Coefficients for the Curiosity Rover Mastcam from Direct Solar Images and Analog Tests

Research Notes of the AAS(2023)

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摘要
Abstract We have used solar images taken by the Curiosity rover’s Mastcam to derive new radiometric response coefficients. In addition, we used calibration data from the Perseverance rover’s Mastcam-Z instrument, which used the same detector, to estimate temperature sensitivity of the radiative response. The new coefficients allow calibration of raw data to radiance using the illuminant (the Sun) as the calibration source. Compared to the original pre-flight and early in-flight calibration, the revised calibration is expected to be more consistent across instrument temperature and allow for a self-consistent conversion to radiance factor values when contemporaneous calibration target images are not available or not appropriate. The revised coefficients were incorporated in a recalibration of Mastcam radiance products.
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关键词
curiosity rover mastcam,radiative response coefficients,radiative response,direct solar images
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