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Optical Engineering

Atmospheric radiance measurements in the 14- to 16-μm carbon dioxide band from the IRS-1B spacecraft
Author(s): Ramani Seshamani; T. K. Alex; Yashwant K. Jain
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Paper Abstract

The conical scanning horizon sensors on the IRS-l B spacecraft have provided results on the outgoing atmospheric 14- to l6-μm carbon dioxide radiance. These radiance values are presented and discussed for the periods January to August 1992. The sensors detect the horizon radiance in the 14- to l6-μm band of carbon dioxide, which is uniformly mixed in the atmosphere. The sensors' narrow field of view cuts the horizon twice in each conical scan, generating a space-to-earth and an earth-to-space crossing. The telemetered counts from the sensor are converted into radiances at various latitude-longitude points. This is the first time that radiance contour plots have been obtained as a function of latitude and longitude. The plots show a hitherto unreported variation of 30% with respect to longitude, which is correlated in some cases with increased stratospheric (10-mbar) temperature.

Paper Details

Date Published: 1 November 1994
PDF: 5 pages
Opt. Eng. 33(11) doi: 10.1117/12.181146
Published in: Optical Engineering Volume 33, Issue 11
Show Author Affiliations
Ramani Seshamani, ISRO Satellite Ctr. (India)
T. K. Alex, ISRO Satellite Ctr. (India)
Yashwant K. Jain, ISRO Satellite Ctr. (India)

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