Accession Number : AD0758412

Title :   Propagation Studies Using a Theoretical Ionospheric Model,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK IONOSPHERE RESEARCH LAB

Personal Author(s) : Lee,Myung-Ki

Report Date : 01 MAR 1973

Pagination or Media Count : 148

Abstract : More is now known about the behavior of the ionospheric densities and temperatures as a function of solar activity, solar zenith angle, season, and geographical location. The currently available mid-latitude ionospheric and neutral atmospheric models are coupled with an advanced three dimensional ray tracing program to see what success would be obtained in predicting the wave propagation conditions and to study to what extent the use of theoretical ionospheric models is practical. The Penn State Mk 1 ionospheric model, the Mitra-Rowe D region model, and the Groves' neutral atmospheric model are used throughout this work to best represent the real electron densities and collision frequencies. The Faraday rotation and differential Doppler velocities from satellites, the propagation modes for long distance high frequency propagation, the group delays for each mode, the ionospheric absorption, and the spatial loss are all predicted. (Author Modified Abstract)

Descriptors :   (*IONOSPHERIC PROPAGATION, ATMOSPHERE MODELS), RADIO TRANSMISSION, ELECTRON DENSITY, IONOSPHERIC DISTURBANCES, RADIOFREQUENCY INTERFERENCE, PREDICTIONS

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE