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25 November 1986 Absolute Calibration Of The SPOT-1 HRV Cameras
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The pre-flight and on-board in-flight absolute radiometric calibrations of the two HRV cameras on SPOT-1 are briefly described. The results of the in-flight calibrations at White Sands, New Mexico are presented in detail and compared to the other methods. The ratio of calibration coefficients for the two SPOT-1 HRVs was obtained from a histogram match of a scene, imaged simultaneously by the two cameras. This was compared to the ratio of the calibration coefficients from the White Sands results. The ratios are in good agreement, < 3% in three bands, the exception is multispectral band 2 which shows a 7% difference. The histogram result and a comparison with spectral radiances measured from an altitude of 3000 m indicate that, at the time and under the conditions that the calibrations were madelthe specification for a ± 10% RMS absolute calibration uncertainty for the SPOT-1 HRVs had been met. The White Sands and histogram ratio results were used to update the calibration of the on-board suncalibrator system for the HRVs.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G Begni, M C Dinguirard, R D Jackson, and P N Slater "Absolute Calibration Of The SPOT-1 HRV Cameras", Proc. SPIE 0660, Earth Remote Sensing Using the Landsat Thermatic Mapper and SPOT Sensor Systems, (25 November 1986);

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