[aprssig] Differential GPS?
needhame1 at plateautel.net
Thu Apr 23 23:25:26 CDT 2009
Steve Dimse wrote:
> My recollection is we added this when Steve Bible of TAPR produced his
> differential GPS generator, it cost maybe $300 including the GPS. That
> project never got traction for the channel load issue you mention, and
> then Garmin killed the GPS it depended upon which killed the project.
> It sure was a cool thing though. This was very different from the boat
> store models. Boat store DGPS receivers depend on a site which
> determines the GPS errors and transmits them on subcarriers of
> broadcast FM stations or other transmitters.
Just for interest' sake -- the "boat store" DGPS receivers are for
beacons in the 300 khz range -- I believe the band goes from 285 khz to
325 khz -- or somewhere close to those limits.
KD5XB -- Earl Needham
Clovis, New Mexico DM84jk
Quoting from the Coast Guard: ZUT
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