Radiometric calibration of an airborne multispectral scanner

Brian L. Markham; Suraiya P. Ahmad; Ray D. Jackson; M. Susan Moran; Stuart F. Biggar; David I. Gellman; Philip N. Slater

doi:10.1117/12.46698

1 August 1991 Radiometric calibration of an airborne multispectral scanner

Brian L. Markham, Suraiya P. Ahmad, Ray D. Jackson, M. Susan Moran, Stuart F. Biggar, David I. Gellman, Philip N. Slater

Author Affiliations +

Proceedings Volume 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation; (1991) https://doi.org/10.1117/12.46698
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

The absolute radiometric calibration of the NS001 Thematic Mapper Simulator reflective channels was examined based on laboratory tests and in-flight comparisons to ground measurements. The NS001 data are calibrated in-flight by reference to the NS001 internal integrating sphere source. This source's power supply or monitoring circuitry exhibited greater instability in-flight during 1988-1989 than in the laboratory. Extrapolating laboratory behavior to in-flight data resulted in 7-20 percent radiance errors relative to ground measurements and atmospheric modeling. Assuming constancy in the source's output between laboraotry and in-flight resulted in generally smaller errors. Upgrades to the source's power supply and monitoring circuitry in 1990 improved its in-flight stability, though in-flight ground reflectance based calibration tests have not yet been performed.

Citation Download Citation

Brian L. Markham, Suraiya P. Ahmad, Ray D. Jackson, M. Susan Moran, Stuart F. Biggar, David I. Gellman, and Philip N. Slater "Radiometric calibration of an airborne multispectral scanner", Proc. SPIE 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation, (1 August 1991); https://doi.org/10.1117/12.46698

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