[time-nuts] TruePosition GPSDO Holdover Issues
ke4qdl at gmail.com
Tue May 15 17:32:08 EDT 2018
On Tue, May 15, 2018 at 3:27 PM, Hal Murray <hmurray at megapathdsl.net> wrote:
> If you are far enough north, you are in the hole, but you can see the
> side of the hole over the pole.
> It's not hard to make your own plots. This is from 66 38' north.
> If anybody wants to play, I'll put the code on the web.
> There are several steps. First is to collect the data. I have a python
> script that grabs everything from a NMEA device and logs each line with a
> time stamp. The GPS orbit period is 12 hours so you need 12 hours of data
> see everything. But there are 30 satellites, so a few hours will show the
> The next step is to extract the data into a useful format. That's another
> python script. Then, just feed that to gunplot.
I'd like to see a copy of the code, please.
More information about the time-nuts