Plenty of very cheap buck converters to get 5V from higher voltage DC
sources. I don't think power is a problem.
What is this composed of? Does RTKLib allow you to output data as an
NTRIP caster?
Is there any kind of database your GPS could look up against its
location and select it? Or would you just need to know the IP# as an
ad-hoc lookup?
Danny
On 5/12/2014 5:22 PM, John Morris wrote:
The basic requirements for a base station are 1) a good location, 2)
reliable power and 3) reliable networking. I suspect ham relay towers
are in excellent locations and they have solved the power issues. They
probably don't have great networking bandwidth. You could handle a
limited number of connections on a local caster, but the main "hub"
caster should have a high bandwidth connection and probably reside
somewhere back in town.
My rPI fits into a weatherproof box and is powered over the ethernet
cable (POE). I'm using a Trmble compact dome antenna mounted on a
3/4" pipe. Rather than placing the antenna on a tall, wiggling tower,
I'm hammering the pipe deep into the ground. The earth is a much more
stable platform for precise positioning.
I'm not sure what voltages are available in the ham towers. The rPi
needs a clean 5V. I'm using a remote POE adapter over a 100m
ethernet cable. If you have 110Vac or 12V nearby, you could use a
simple USB charger instead.
John Morris
Menlo Park, CA
________________________________________
From: foss-gps-boun...@lists.osgeo.org
<foss-gps-boun...@lists.osgeo.org> on behalf of John Morris
<j...@coyotebush.net>
Sent: Monday, May 12, 2014 11:17 AM
To: Open Source GPS-related discussion and support
Subject: Re: [FOSS-GPS] Amateur NTRIP casters
I'm setting up a small ntrip caster which runs on a RaspberryPi. It
takes data from an Lea-Xt and can broadcast both raw and RTCM 3.1
messages. It doesn't support all the variations of Ntrip - just Ntrip
2 over tcp with simple password protection - but that is all I need
for my purposes.
Over all, I'd like to set up a series of local, community base
stations, and then do a mobile app for short static positions. I
haven't started the mobile app yet, but the base station software is
close to being usable.
I'd be interested in collaborating.
John Morris
Menlo Park, CA
________________________________________
From: foss-gps-boun...@lists.osgeo.org
<foss-gps-boun...@lists.osgeo.org> on behalf of Danny Miller
<dan...@austin.rr.com>
Sent: Thursday, May 08, 2014 1:25 PM
To: foss-gps@lists.osgeo.org
Subject: [FOSS-GPS] Amateur NTRIP casters
I have seen some things about NTRIP casters as references. They're
supposed to be useful, but few and far between. Long-distance baselines
are likely.
I was talking to a local ham radio group the other day, which was into
setting up stations... repeaters I think, as a grassroots public
service. I think there was some sort of internet connection involved
there.
Would it be useful to use something like LEA-6T or NV08-C L1 stuff as an
amateur, but more likely to be local (low baseline), NTRIP caster?
It really doesn't seem difficult to add this functionality to the sort
of physical stations they do. Is it useful for accuracy? Is there an
existing framework by which amateur, local NTRIP data could be located
and accessed?
Danny
_______________________________________________
This message is sent to you from FOSS-GPS@lists.osgeo.org mailing list.
Visit http://lists.osgeo.org/mailman/listinfo/foss-gps
<http://lists.osgeo.org/mailman/listinfo/foss-gps> to manage your
subscription
For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
<http://wiki.osgeo.org/wiki/FOSS-GPS>
_______________________________________________
This message is sent to you from FOSS-GPS@lists.osgeo.org mailing list.
Visit http://lists.osgeo.org/mailman/listinfo/foss-gps
<http://lists.osgeo.org/mailman/listinfo/foss-gps> to manage your
subscription
For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
<http://wiki.osgeo.org/wiki/FOSS-GPS>
_______________________________________________
This message is sent to you from FOSS-GPS@lists.osgeo.org mailing list.
Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your
subscription
For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
_______________________________________________
This message is sent to you from FOSS-GPS@lists.osgeo.org mailing list.
Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your
subscription
For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
