A good general purpose reference on GPS surveying is
http://140.194.76.129/publications/eng-manuals/em1110-1-1003/toc.htm
Title: * Engineering and Design - NAVSTAR Global Positioning System
Surveying *
*by the Army Corp of Engineering. Full manual is 20 Mb.
*On 12/6/2010 1:06 AM, Rob
Thanks all for their comments on this topic.
Over the weekend I spent much time messing about with the NTP stuff and
the NMEAGps application.
NMEAGps does just as described and does make a nice IRIG-B signal
through a PC's sound card. Unfortunately you cannot specifiy which of
several
Would Virtual Audio Cable (VAC) software provide the routing neccessary
for your application ?
Stan, W1LE
On 12/6/2010 8:12 AM, Collins, Graham wrote:
Thanks all for their comments on this topic.
Over the weekend I spent much time messing about with the NTP stuff and
the NMEAGps
Paul,
That is very much appreciated. I have one of these boxes. I didn't realize
that the signal was no longer being broadcast, so at this point I'm all for
whatever hacks will make it useful.
Thanks,
-JP
On Fri, Dec 3, 2010 at 5:55 PM, paul swed paulsw...@gmail.com wrote:
Well I think this
Justin,
I might think quite a few time Nuts have these.
So making progress have build a gps sat message decoder for the GPRMC
sentence that gives time and data. I believe most GPS units put that
sentence out. Have it decoding time and next is date. Maybe tonight.
Then I have to glue this code into
There are also a lot of GPS hockey pucks that send the NMEA codes
to map software in a laptop that are rapidly becoming obsolete.
NMEA is adequate for the 468 display.
Have three of them, to go with three NIB (except for the manual)
DC 468 receivers. Don't need any of them.
Bill Hawkins
Well indeed progress the dc468 is now sync'ing to gps on start.
Have a dirty fudge factor to get the seconds exactly synced. Don't like it
but does work.
Did try to use hex as a month indicator and that did not work.
As an example Nov would be A and Dec B. But looking at the driver ckts its
