NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A two-component rain model for the prediction of attenuation and diversity improvementA new model was developed to predict attenuation statistics for a single Earth-satellite or terrestrial propagation path. The model was extended to provide predictions of the joint occurrences of specified or higher attenuation values on two closely spaced Earth-satellite paths. The joint statistics provide the information required to obtain diversity gain or diversity advantage estimates. The new model is meteorologically based. It was tested against available Earth-satellite beacon observations and terrestrial path measurements. The model employs the rain climate region descriptions of the Global rain model. The rms deviation between the predicted and observed attenuation values for the terrestrial path data was 35 percent, a result consistent with the expectations of the Global model when the rain rate distribution for the path is not used in the calculation. Within the United States the rms deviation between measurement and prediction was 36 percent but worldwide it was 79 percent.
Document ID
19820025716
Document Type
Contractor Report (CR)
Authors
Crane, R. K. (Dartmouth Coll. Hanover, NH, United States)
Date Acquired
September 4, 2013
Publication Date
February 1, 1982
Subject Category
COMMUNICATIONS AND RADAR
Report/Patent Number
NAS 1.26:169198
NASA-CR-169198
Funding Number(s)
CONTRACT_GRANT: NASW-3506
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19820025716.pdf STI