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Proceedings Paper

Clouds and the Earth's Radiant Energy System (CERES) spectral response characterizations
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Paper Abstract

Spectral Characterizations of the CERES thermistor bolometer is a critical factor in determining precisely the earth's radiant energy budget. CERES bolometers are used in studying the balance between the incoming solar radiation from the sun, the scattered and reflected solar radiation, and the longwave-emitted radiation from the earth. To account for the different frequencies, the CERES instrument contains three thermistor bolometer channels; total channel (0.3 -> 2OO-µm), shortwave channel (0.3 — 5-µm), and window channel (8 — 12-µm). Information on the CERES sensor spectral response is required for their radiometric calibrations. The longwave infrared region (2 - > 2OO-µm) spectral measurements were collected and measured in the TRW Fourier Transform Spectrometer (FTS) vacuum chamber facility. In this paper, in addition to a general review of the concept; the algorithms and procedures are presented which were used to characterize spectrally the sensors' responses. These sensitive modifications are contained both in the shortwave and the longwave regions of the spectral response. Such changes include modifications to the method of analyzing the raw FTS data to produce the longwave region of the spectral response. Other factors which affect the spectral response, such as the Transfer Active Cavity Radiometer's (TACR) calibration data reduction method will also be analyzed.

Paper Details

Date Published: 15 November 2000
PDF: 12 pages
Proc. SPIE 4135, Earth Observing Systems V, (15 November 2000); doi: 10.1117/12.494240
Show Author Affiliations
Aiman Al-Hajjah, Science Applications International Corp. (United States)
Kory J. Priestley, NASA Langley Research Ctr. (United States)
Susan Thomas, Science Applications International Corp. (United States)
Robert Benjamin Lee III, NASA Langley Research Ctr. (United States)
Bruce R. Barkstrom, NASA Langley Research Ctr. (United States)
Jack Paden, Science Applications International Corp. (United States)
Dhirendra K. Pandey, Science Applications International Corp. (United States)
Robert S. Wilson, Science Applications International Corp. (United States)

Published in SPIE Proceedings Vol. 4135:
Earth Observing Systems V
William L. Barnes, Editor(s)

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