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Effect of limb darkening on earth radiation incident on a spherical satelliteThe thermal radiation from the earth incident on a spherical satellite depends on the angular distribution of earth-emitted radiation. An analysis is presented of this dependency, and calculated results are given, based on a published limb-darkening curve for the earth. The curve was determined from Tiros data, and is a statistical average over the entire globe between 75 deg latitude. The computed effect of limb darkening was 1.8 percent at 900 km altitude, 2.5 percent at 500 km altitude, and 3.0 percent at 300 km altitude. Below 300 km, it increased rapidly with decreasing altitude. Discussion is included of various other problems inherent in the use of orbiting spheres and stabilized flat plates to measure the heat radiated from the earth.
Document ID
19750005355
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Katzoff, S. (NASA Langley Research Center Hampton, VA, United States)
Smith, G. L. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 3, 2013
Publication Date
December 1, 1974
Subject Category
Geophysics
Report/Patent Number
L-9698
NASA-TN-D-7807
Accession Number
75N13427
Funding Number(s)
PROJECT: RTOP 175-21-32-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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