Re: Attempting to access the GD-8200 GPS

[Gary E. Miller]

Yo Stuart!

On Thu, 14 Jul 2022 21:48:57 -0400
Stuart Blake Tener <stuart.tener@bh90210.net> wrote:

> I tried cgps and found it to be most useful, though I cannot say the  
> same about xpgs. xgps seems to not even have a place to click to  
> maximize it, the font is terrible and I had trouble even seeing the  
> bottom of its opening window.

There is no point maximizing it.  It is fixed size.  Since it is X, the
font is under your control.

> I ran cgps with the "-s" option which  
> extirpated the GPS sentence spewing from the mix.

If you want to throw anyay information, that is your choice.

> Regarding "/etc/default/gpsd", if that is not a part of the standard  
> distribution of the gpsd then I understand entirely.

Yup, not part of gpsd.  We do include some vendor suggested files, but
we dont control them.

> I will try the "gpsctl -s ${baud}" command later, but I do not  think
> my GPS is supported hardware.

"gpsctl -l" disagrees.  YMMV.


> I also believe that if after 10-15 minutes almanac and ephemeral data
> are still remaining unpopulated

As I said earlier, you need to wait 30 minutes.  An entire Almanac
takes 12.5 minutes, after one satellite is used.  And then older
devices wait for the start of the 12.5 minute cycle.  So 30 minutes,
at lesst.

> I also did some additional research and now realize that all you get  
> with PPS (as far as GPS time is concerned) is picosecond to  
> microsecond accuracy, something I do not care about. My laptop or any
> of my lab boxes could 5 seconds off and it would not mean anything to
> me.

You should be able to get better tahn 1 second from 4800 baud NMEA.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin

pgpPP3cURzh4B.pgp
Description: OpenPGP digital signature