NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Ground Calibrations of the Clouds and the Earth's Radiant Energy System (CERES) Tropical Rainfall Measuring Mission Spacecraft Thermistor BolometersThe Clouds and the Earth's Radiant Energy System (CERES) spacecraft scanning thermistor bolometers will measure earth-reflected solar and earth-emmitted,longwave radiances, at the top-of-the-atmosphere. The measurements are performed in the broadband shortwave (0.3-5.0 micron) and longwave (5.0 - >100 micron) spectral regions as well as in the 8 -12 micron water vapor window over geographical footprints as small as 10 kilometers at the nadir. The CERES measurements are designed to improve our knowledge of the earth's natural climate processes, in particular those related to clouds, and man's impact upon climate as indicated by atmospheric temperature. November 1997, the first set of CERES bolometers is scheduled for launch on the Tropical Rainfall Measuring Mission (TRMM) Spacecraft. The CERES bolometers were calibrated radiometrically in a vacuum ground facility using absolute reference sources, tied to the International Temperature Scale of 1990. Accurate bolometer calibrations are dependent upon the derivations of the radiances from the spectral properties [reflectance, transmittance, emittance, etc.] of both the sources and bolometers. In this paper, the overall calibration approaches are discussed for the longwave and shortwave calibrations. The spectral responses for the TRMM bolometer units are presented and applied to the bolometer ground calibrations in order to determine pre-launch calibration gains.
Document ID
19990047390
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Lee, Robert B., III
(NASA Langley Research Center Hampton, VA United States)
Smith, G. Lou
(NASA Langley Research Center Hampton, VA United States)
Barkstrom, Bruce R.
(NASA Langley Research Center Hampton, VA United States)
Priestley, Kory J.
(NASA Langley Research Center Hampton, VA United States)
Thomas, Susan
(Science Applications International Corp. Hampton, VA United States)
Paden, Jack
(Science Applications International Corp. Hampton, VA United States)
Pandey, Direndra K.
(Science Applications International Corp. Hampton, VA United States)
Thornhill, K. Lee
(Science Applications International Corp. Hampton, VA United States)
Bolden, William C.
(Science Applications International Corp. Hampton, VA United States)
Wilson, Robert S.
(Science Applications International Corp. Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1997
Publication Information
Publication: Earth Observing Systems II
Publisher: International Society for Optical Engineers
Volume: 3117
Subject Category
Environment Pollution
Meeting Information
Meeting: Earth Observing System II
Location: San Diego, CA
Country: United States
Start Date: July 28, 1997
End Date: July 29, 1997
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available