INTERFERENCE PREDICTIONS FOR VHF/UHF AIR NAVIGATION AIDS.
INSTITUTES FOR ENVIRONMENTAL RESEARCH BOULDER COLO
Pagination or Media Count:
Desired-to-undesired signal ratio predictions for the VHF Omnirange VOR, Tactical Air Navigation TACAN and Instrument Landing Systems ILS air navigation aids are presented in this report. The parameters involved in the various systems are given first. Next propagation mechanisms applicable to the VHF and UHF bands are discussed together with the calculation of transmission loss and its variability. Third, the statistical nature of the desired-to-undesired signal ratio predictions is explained. Finally, the results of the study are presented in graphical form. Aircraft altitudes from 500 to 100,000 feet along with station separations from 20 to 695 nautical miles are considered. Detailed procedures, mathematical formulas, and computer programs used are discussed in the Appendices. Author
- Radio Communications