Celestial infrared calibration sources in the 8-14 micrometer region
Subtitle: Venus and Jupiter
By: Thomas E. Cecil ... [et al.].
Contributors: Air Force Cambridge Research Laboratories (U.S.)
Series: Physical sciences research papers -- no. 562; Physical sciences research papers (Air Force Cambridge Research Laboratories (U.S.)) -- no. 562
Publisher: Air Force Systems Command, USAF, Air Force Cambridge Research Laboratories, Terrestrial Sciences Laboratory
Published: 1973
Place of publication: L.G. Hanscom Field, Bedford, Mass
Language: eng
Number of pages: 18
Subjects: Infrared spectra; Infrared instruments; Atmosphere; Infrared radiation; Calibration; Venus (Planets); Jupiter (Planets)
Other titles: Celestial infrared calibration sources in the eight to fourteen micrometer region :
Description: Venus and Jupiter are often used as long wavelength infrared (LWIR) calibration sources. The authors have reviewed the literature on radiometric and spectrometric measurements of these two planets and adopted reasonable brightness temperatures and spectral dependencies for their thermal radiation. Using these data, irradiance coefficients that can be used to determine the irradiance reaching the earth from these planets at any time were calculated. A crucial factor in the utility of these planets as calibration sources is the constancy with which they radiate in the infrared. The authors conclude that Jupiter may be a variable source. Venus, on the other hand, appears to be generally quite constant, but brief temporal variations may take place.
Notes: Cover title

"AFCRL-TR-73-0559."

"5 September 1973."

"Terrestrial Sciences Laboratory Project 7670."

Includes bibliographical references (p. 17-18).