Determination and validation of slow mode coefficients of the Clouds and the Earth's Radiant Energy System (CERES) scanning thermistor bolometers

G. Louis Smith; Dhirendra K. Pandey; Peter L. Spence; Kory J. Priestley; Bruce R. Barkstrom; Robert Benjamin Lee III; Jack Paden; Susan Thomas; Robert S. Wilson; Aiman Al-Hajjah

doi:10.1117/12.494226

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15 November 2000 Determination and validation of slow mode coefficients of the Clouds and the Earth's Radiant Energy System (CERES) scanning thermistor bolometers

G. Louis Smith, Dhirendra K. Pandey, Peter L. Spence, Kory J. Priestley, Bruce R. Barkstrom, Robert Benjamin Lee III, Jack Paden, Susan Thomas, Robert S. Wilson, Aiman Al-Hajjah

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Proceedings Volume 4135, Earth Observing Systems V; (2000) https://doi.org/10.1117/12.494226
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

The Clouds and the Earth’s Radiant Energy System (CERES) scanning thermistor bolometers have a response time of approximately 9 ms for 98 to 99% of the signal, after which there is a slow change for the remaining 1 to 2% of the response due to a slow mode. This paper describes the theoretical and experimental procedures used in producing the slow mode coefficients for the CERES Flight Models 1 and 2 instruments aboard the Terra spacecraft, which was launched on December 18,1999. The response behavior for the total thermistor bolometer (0.3 - > 100 µm) and window channel (8-12 µm) were determined by analyzing the internal blackbody calibration ground data while the shortwave thermistor bolometer (0.3 - 5 µm) was determined using shortwave internal calibration source ground data obtained at the TRW calibration facility at Redondo Beach, California. These slow mode coefficients agree with the coefficients obtained by analyzing the in-flight calibration data. A numerical filter removes the effects of the slow mode from the measurements. The method may be applicable to other instruments which have spurious transients.

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G. Louis Smith, Dhirendra K. Pandey, Peter L. Spence, Kory J. Priestley, Bruce R. Barkstrom, Robert Benjamin Lee III, Jack Paden, Susan Thomas, Robert S. Wilson, and Aiman Al-Hajjah "Determination and validation of slow mode coefficients of the Clouds and the Earth's Radiant Energy System (CERES) scanning thermistor bolometers", Proc. SPIE 4135, Earth Observing Systems V, (15 November 2000); https://doi.org/10.1117/12.494226

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