Characterizations Of The Earth Radiation Budget Experiment (ERBE) Scanning Radiometers

Robert B. Lee III; Bruce R. Barkstrom; Nesim Halyo; Michael A. Gibson; Lee M. Avis

doi:10.1117/12.960721

26 September 1989 Characterizations Of The Earth Radiation Budget Experiment (ERBE) Scanning Radiometers

Robert B. Lee III, Bruce R. Barkstrom, Nesim Halyo, Michael A. Gibson, Lee M. Avis

Proceedings Volume 1109, Optical Radiation Measurements II; (1989) https://doi.org/10.1117/12.960721
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

From the Earth Radiation Budget Satellite (ERBS) and the National Oceanic and Atmospheric Administration NOAA 9 and 10 spacecraft platforms, the NASA Earth Radiation Budget Experiment (ERBE) is making absolute measurements of the incoming solar, shortwave Earth-reflected solar, and longwave Earth-emitted fluxes using scanning and nonscanning radiometers. Each of the three spacecraft platforms carries narrow field-of-view (FOV) scanning shortwave, longwave, and total radiometers which measure the radiation in the broadband spectral regions from 0.2 to 5.0 microns, from 5.0 to 50.0 microns, and from 0.2 to 50.0 microns, respectively. The radiometers' detection sensors are thermistor bolometers, coated with a black paint which has a very high coefficient of absorptance. In a laboratory vacuum environment, the gains of the total and longwave radiometers were characterized with uncertainties approaching 1% using the master reference blackbody (MRBB) which is tied to the international practical temperature scale of 1968. Also in vacuum, the gains of the shortwave radiometers were characterized using a 50.8-cm diameter integrating sphere. The sphere was calibrated absolutely using the total and longwave radiometers as transfer standards from the MRBB. The calibration models and approaches which were used to characterize the output signals of the scanning radiometers are described in this paper. Brief descriptions of the scanners and flight calibration systems are presented.

Citation Download Citation

Robert B. Lee III, Bruce R. Barkstrom, Nesim Halyo, Michael A. Gibson, and Lee M. Avis "Characterizations Of The Earth Radiation Budget Experiment (ERBE) Scanning Radiometers", Proc. SPIE 1109, Optical Radiation Measurements II, (26 September 1989); https://doi.org/10.1117/12.960721

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