Accession Number : AD0760685
Title : A D-Region Model Which Accounts for Quiet and Disturbed VLF Propagation Phenomena.
Descriptive Note : Research rept. Jul 72-Jan 73,
Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CALIF
Personal Author(s) : Bleiweiss,M. P. ; Hildebrand,V. E. ; Hill,J. R.
Report Date : 30 MAR 1973
Pagination or Media Count : 29
Abstract : The work reported in the report is part of a continuing program to devise and test atmospheric models for use in radio wave propagation prediction. The requirement to be met was to build a time-varying model of the D-region of the ionosphere which, when used in vlf propagation models, could account for vlf propagation phenomena observed during ambient conditions and during the times when a solar X-ray flare was in progress. A further objective was to test the validity of a model having a minimum of complexity. The model presented here succeeds in the grosser aspects but will require further work to acquire a detailed match between the observed and predicted propagation.
Descriptors : (*IONOSPHERIC DISTURBANCES, MATHEMATICAL MODELS), (*IONOSPHERIC PROPAGATION, ATMOSPHERE MODELS), VERY LOW FREQUENCY, ELECTRON DENSITY, SOLAR FLARES, RADIOFREQUENCY INTERFERENCE
Subject Categories : Atmospheric Physics
Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE