I found some interesting documents concerning FS measurements on 300 kHz at the
website of ITS, Boulder, Colorado (Institute for Telecommunications Sciences).
http://www.its.bldrdoc.gov/pub/dgps98/
http://www.its.bldrdoc.gov/pub/dgps97/
Calculation procedure:
http://www.its.bldrdoc.gov/pub/dgps98/appdx_a.pdf
In the summary:
"The dependence of field strength with distance from the transmitter is in good
agreement with the predictions of propagation models in the absence of irregular
terrain."
I have made some more measurements which are published on my home page. There is still a
5-6 dB discrepancy between calculated and measured values. Next step will be to improve
the radial system with lengths of chicken net near the antenna base + ordinary radials
and see what happens with the "missing dB's".
73
sm6pxj, Christer
( http://home5.swipnet.se/~w-54761/fs.htm )
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