Modeling of Transionospheric Radio Propagation.
Final technical rept. May 74-May 75,
STANFORD RESEARCH INST MENLO PARK CA
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This is the final quarterly technical report on a one-year contract to extend and improve an existing empirical model for worldwide behavior of ionospherically imposed radio-wave scintillation. The objectives of the project were 1 to improve the accuracy of model-based calculations of the intensity- scintillation index and 2 to develop a capability for full description from the point of view of engineering applications of the first-order, complex- signal statistics that characterize the transionospheric radio communication channel. The stated objectives of the just-completed project were accomplished by starting with the scintillation model developed by Fremouw and Rino 1973, adding a geomagnetic-activity dependence for the behavior of scintillation- producing ionospheric irregularities, and substituting a more accurate and general scattering theory for that of Briggs and Parkin 1963 used in the earlier model. The results of these efforts have been implemented in two computer programs. The first, entitled RFMOD, contains the main elements of the scattering theory, the morphological model for ionospheric irregularity strength and other parameters, and subroutines for calculating the geometry and other relevant quantities from user-specified inputs.
- Radiofrequency Wave Propagation
- Radio Communications