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Meteorological factors in Earth-Satellite propagationA 5-meter paraboloidal antenna operated at 28 GHz showed gain changes of 2 dB due to rain. While precise estimation of the corresponding angle of arrival changes is difficult, they appear to have been on the order of 0.02 degrees. The attenuation at 28.6 GHz inferred from radiometry agreed well with that measured simultaneously over a satellite/Earth link at the same frequency. The radiometers so calibrated have been used to add to the available site diversity data base using a 9 km baseline. An improved empirical model of site diversity gain was obtained by applying regression techniques to available published data. A brief review of the literature has led to suggestions for two experimental programs, one dealing with multifrequency radiometry and the other with the effects of the stochastic properties of precipitation on wideband data transmission.
Document ID
19850018778
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Levis, C. A. (Ohio State Univ. Columbus, OH, United States)
Damon, E. K. (Ohio State Univ. Columbus, OH, United States)
Lin, K. T. (Ohio State Univ. Columbus, OH, United States)
Weller, A. E., III (Ohio State Univ. Columbus, OH, United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1984
Subject Category
Communications And Radar
Report/Patent Number
NAS 1.26:175764
NASA-CR-175764
JPL-9950-979
ESL-713656-4
Accession Number
85N27089
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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