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Proceedings Paper

Effect of water vapor absorption on integrating sphere output radiance and consequences for instrument calibration
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Paper Abstract

Multiple photon scatterings inside an integrating sphere can result in significant path lengths compared with line-of- sight sources. In strong water vapor absorption channels, such as those on MODIS and the MODIS airborne simulator, these internal path lengths can result in a significant reduction in sphere output radiance. Path length probability distributions for photons exiting a sphere are determined using Monte Carlo calculations. Approximate analytic expressions are also derived. Results are used to determine the effect of water vapor absorption on integrating sphere sensor calibrations in several pertinent channels.

Paper Details

Date Published: 11 November 1996
PDF: 9 pages
Proc. SPIE 2820, Earth Observing System, (11 November 1996); doi: 10.1117/12.258102
Show Author Affiliations
Steven E. Platnick, NASA Goddard Space Flight Ctr. and Univ. of Maryland/Baltimore County (United States)
Peter Abel, NASA Goddard Space Flight Ctr. (United States)
Michael D. King, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 2820:
Earth Observing System
William L. Barnes, Editor(s)

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