[time-nuts] Slightly OT - GPS-Based Accurate Direction Finding
jimlux at earthlink.net
Thu Aug 26 13:49:27 UTC 2010
Stanley Reynolds wrote:
> You still need to DF the VOR station to get your direction. guess any radio that
> receives 108 to 117 MHz is good for that.
You don't need to DF the VOR if you decode the signals.. the decoded
signal (i.e. the phase difference between the 30 Hz AM and FM
modulations) tells you what direction the VOR is relative to you (or
more properly, which direction you are relative to the VOR).. however,
on the ground, you're doing real well if you're within 5-10 degrees
(multipath, diffraction and refraction are not your friends here).
You'd be better off with a $10 magnetic compass and have better accuracy.
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