Calibrated intercepts for solar radiometers used in remote sensor calibration

David I. Gellman; Stuart F. Biggar; Philip N. Slater; Carol J. Bruegge

doi:10.1117/12.46695

1 August 1991 Calibrated intercepts for solar radiometers used in remote sensor calibration

David I. Gellman, Stuart F. Biggar, Philip N. Slater, Carol J. Bruegge

Proceedings Volume 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation; (1991) https://doi.org/10.1117/12.46695
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

Calibrated solar radiometer intercepts allow spectral optical depths to be determined for days with intermittently clear skies. This is of particular importance on satellite sensor calibration days that are cloudy except at the time of image acquisition. This paper describes the calibration of four solar radiometers using the Langley-Bouguer technique for data collected on days with a clear, stable atmosphere. Intercepts are determined with an uncertainty of less than six percent, corresponding to a maximum uncertainty of 0.06 in optical depth. The spread of voltage intercepts calculated in this process is carried through three methods of radiometric calibration of satellite sensors to yield an uncertainty in radiance at the top of the atmosphere of less than one percent associated with the uncertainty in solar radiometer intercepts for a range of ground reflectances.

Citation Download Citation

David I. Gellman, Stuart F. Biggar, Philip N. Slater, and Carol J. Bruegge "Calibrated intercepts for solar radiometers used in remote sensor calibration", Proc. SPIE 1493, Calibration of Passive Remote Observing Optical and Microwave Instrumentation, (1 August 1991); https://doi.org/10.1117/12.46695

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