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A statistical rain attenuation prediction model with application to the advanced communication technology satellite project. 1: Theoretical development and application to yearly predictions for selected cities in the United StatesA rain attenuation prediction model is described for use in calculating satellite communication link availability for any specific location in the world that is characterized by an extended record of rainfall. Such a formalism is necessary for the accurate assessment of such availability predictions in the case of the small user-terminal concept of the Advanced Communication Technology Satellite (ACTS) Project. The model employs the theory of extreme value statistics to generate the necessary statistical rainrate parameters from rain data in the form compiled by the National Weather Service. These location dependent rain statistics are then applied to a rain attenuation model to obtain a yearly prediction of the occurrence of attenuation on any satellite link at that location. The predictions of this model are compared to those of the Crane Two-Component Rain Model and some empirical data and found to be very good. The model is then used to calculate rain attenuation statistics at 59 locations in the United States (including Alaska and Hawaii) for the 20 GHz downlinks and 30 GHz uplinks of the proposed ACTS system. The flexibility of this modeling formalism is such that it allows a complete and unified treatment of the temporal aspects of rain attenuation that leads to the design of an optimum stochastic power control algorithm, the purpose of which is to efficiently counter such rain fades on a satellite link.
Document ID
19880019693
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Manning, Robert M. (Analex Corp. Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
September 1, 1986
Subject Category
Communications And Radar
Report/Patent Number
E-3187
NAS 1.26:179498
NASA-CR-179498
Accession Number
88N29077
Funding Number(s)
PROJECT: RTOP 679-40
CONTRACT_GRANT: NAS3-24564
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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