Re: LF: OH2LX comments on measuring field strength

["Walter Blanchard" <blanch@pncl.co.uk>]

At 16:23 21/07/99 +0200, Dick Rollema wrote: 

..............................................Vaino mentioned DGPS. This
stands
for Differential GPS. I have heard that the corrections to be applied to the
GPS data in order to become a more accurate fix are transmitted via
existing MF
or LF beacons. Perhaps Vaino can tell via a message on the reflector if what I
have heard is correct or not. 

Yes........nearly all the MF beacons you can hear between 285 ....315 kHz  are
now transmitting diff.  Most 100  Bd ; some 200.
Also,  the Sylt Loran-C tx  (12.5 Bd PPM)  and a couple of LF stations atround
123 kHz.  With a good GPS set you can get 1-2 metres.
I've successfully tracked all of them up to 900 kms range in daylight;  and 
as  far as Cape Race NFLD, at night.
Walter G3JKV.