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Re: [gpsd-users] gpsd with ntrip

From: Gary E. Miller
Subject: Re: [gpsd-users] gpsd with ntrip
Date: Wed, 16 Jan 2019 10:10:36 -0800

Yo Ralph!

On Wed, 16 Jan 2019 14:51:09 +0100
Ralph Nemitz <address@hidden> wrote:

> if I want take into account DGSP data, then is the syntax of a gpsd
> call :

Unless you are doing short baseline RTK, there is no point.  Is that
what you are doing?

> host~# /usr/sbin/gpsd -n -D 4 -N ntrip://user:address@hidden:port/stream 
> /dev/ttyACM0
> "user", "passwd", "host", "port": the meaning is obviusly but what 
> content has "stream"?

If you replace "ntrip://" with "http://"; then the stream should be obvious.
It is just the hostname or IP of the source.  Like all other URLs.

> If I use "str2str" from the "rtklib" then the meaning after
> "...port/" is the MOUNTPOINT.

Not familiar with how rtklib works.  But usually you feed the gpsd daa
to rtklib, not the other way around.  Very few GPS know what to
do with DGPS input.

> How must be the output from the call above to see that DGPS data from 
> the ntrip caster were taken into account?

The output just has to follow the ntrip standard.  The hard part is getting
a compatible GPS.  And then, w/o a short baseline, a lot of work for

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

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

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