Program SKYTRIG - SKYWAVE TRIGONOMETRY

With an input of elevation angle, layer height and critical frequency,
the program calculates skywave path distance, groundpath distance,
spreading (dispersion) loss, field strength from a 100 watt
transmitter, and the MUF.

The program can be used for guidance on the low MUF's and the geometry
of near vertical incidence radio paths over short distance
groundpaths.

Elevation angle is NOT the angle at which an antenna radiates the
strongest signal. It is the angle of the path taken by the radio wave
between two places on the Earth's surface and is nothing to do with an
antenna.

The program notes provide some elementary information on the heights
and behaviour of the various ionospheric layers in sunlight and in
darkness. Also on factors which affect received field strength such as
operating frequency being greater than MUF.

Download in a few seconds program SKYTRIG from website below.
Filesize = 42 kilo-bytes. Run immediately. Or you can open/run it
without downloading.
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Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
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