In-flight radiometric stability of HYDICE for large and small uniform reflectance targets under various conditions

Philip N. Slater; Robert W. Basedow; William S. Aldrich; John E. Colwell

doi:10.1117/12.257178

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6 November 1996 In-flight radiometric stability of HYDICE for large and small uniform reflectance targets under various conditions

Philip N. Slater, Robert W. Basedow, William S. Aldrich, John E. Colwell

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Proceedings Volume 2821, Hyperspectral Remote Sensing and Applications; (1996) https://doi.org/10.1117/12.257178
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

The in-flight radiometric stability of images formed in a single spectral band of HYDICE has been examined under various conditions. In the first, the stability of the combined response of the on-board calibrator and HYDICE was checked by comparing repeated image acquisitions over small targets, a few pixels in size, and then over a uniform, extended target. For the second condition, a new flat-field calibration of the focal plane was used which improved the radiometric stability. It is shown from these results that radiometric stability and accuracy are closely related to target contrast and size. This has important consequences for the empirical line approach to calibration or reflectance retrieval. The third condition included a pitch in the attitude of the aircraft that introduced a marked banding of the image in the vicinity of the 1.38-micrometers band, which is very sensitive to the presence of cirrus-cloud ice crystals. This is believed to be another form of the `spectral jitter' described in other papers in these Proceedings.

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Philip N. Slater, Robert W. Basedow, William S. Aldrich, and John E. Colwell "In-flight radiometric stability of HYDICE for large and small uniform reflectance targets under various conditions", Proc. SPIE 2821, Hyperspectral Remote Sensing and Applications, (6 November 1996); https://doi.org/10.1117/12.257178

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