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- VHFPROP! is a versatile and accurate program for computing VHF
- and UHF line-of-sight (ground wave/terrestrial) propagation
- range. Inputs are extensive, including individual antenna
- heights, transmitter power output, antenna gains, line losses,
- and required receiver input level for the desired signal-to-noise
- ratio or quieting.
-
- The output is the calculated range, in miles (all values are in
- English measure) for a particular reliability level ranging from
- 50% to 99.9%.
-
- The program is based on a well-accepted propagation model by
- Egli. One limitation to the program is that it does not
- incorporate a terrain roughness factor correction. Therefore, the
- predicted range may be overly optimistic if terrain has high
- points in the path between the stations.
-
- Reference: John J. Egli, "Radio Propagation above 40 Mc. over
- Irregular Terrain", Proc. IRE, October 1957, pp 1383-1391.
-
- Further described and validated in: "Review of Propagation in the
- 470-890 MHz. Band with Emphasis on Land Mobile and Cellular
- Systems." by F.H. Palmer. Communications Research Centre Report
- Number 1288, February 1976. Avaliable through N.T.I.S. as report
- number N76-27450.
-
- This program, VHFPROP! appears as one of several programs in "The
- Meteor Burst Communications Handbook", by Jacob Z. Schanker. This
- should be available through N.T.I.S. late in 1988 or early 1989.
-