Advanced Propagation Model (APM) Analysis of VHF Signals in the Southern California Desert
SPACE AND NAVAL WARFARE SYSTEMS COMMAND SAN DIEGO CA
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This report analyzes very high frequency signal strength data from two Naval Oceanic Atmospheric Administration weather radio transmitters located in southern California and southwestern Arizona over a wide range of topography ranging from relatively flat to mountainous terrain. Meteorological information was obtained from local radiosonde measurement stations at Miramar NKX and Yuma Proving Ground 1Y7. These data are used as the basis for a validation study of the Advanced Propagation Model APM to determine its applicability for low-altitude mobile radio communications applications over terrain. The APM performs very well for low-altitude propagation over terrain and at least as well as the widely used diffraction model, Terrain Integrated Rough Earth Model TIREM, under standard conditions. The APM performs better when variable refractivity data are available.
- Operations Research
- Radiofrequency Wave Propagation
- Radio Communications