[FOSS-GPS] RTKGPS+ using RTCM with GPS+GLONASS not working

[David Kelley]

gto234:
I took this off line because the below has a negative comment about 
Lefebure's generally really good work.

 From what you say, you simply need a caster, in particular one that 
will relay the serial serial off your uBlox to one or more clients. 
Okay, we have a commercial tool (simple NTRIP os sNTRIP) with a "free" 
mode that will do that I can send you, _but how will you connect the 
cellular link to the "home-office pc" without a static IP_?  If you can 
overcome that (I know there are some sort dynamic DNS solution to do 
this), got you covered and will send you a released you can use as long 
as you provide me a bit feedback on what you think is lacking with it. 
But is will easily do what you need today.

The Lefebure caster/server will not work because he has not updated the 
code base for a numbed of years, and the thing leaks memory and creates 
multiple threads until it locks up in an hour or so.  [The client code 
works fine] The last time I spoke to him was over a year ago but at that 
time he had no interest in developing it further (the source case is dot 
net and I think that he posts that as well).   The real beauty of that 
tool (and which then motivated what we built here for the past two 
years) was that it combined the the serial port part (the so-called 
NTRIP server) with the NTRIP caster in to a small simple utility for a 
PC.  Most GNSS device makers want $1kUS for that feature alone.

Regards, David Kelley


On 12/10/2015 3:45 AM, gto234 wrote:
> After some testing it seems that the RTKGPS+ does very good job if configured
> properly.
> I managed to achieve a instant fixed solution within 1-2 seconds using the
> base and rover at the same spot. What makes the difference in a quick fixed
> solution is the output rate of the receivers. I set it at 5Hz both at the
> base and rover and it made a huge improvement in reacquisition time. Also I
> have to turn off the Ionosphere and Troposphere correction otherwise I can't
> get a fix.
> The problem now I stuck at is how to configure the base (placed in a distant
> location up to 1-2 km) to send the corrections via cell phone's internet and
> then the rover receives the corrections via internet using a second mobile
> phone.
>  From what I have read (sorry I am not a expert) there is 3 parameters
> involved.
> A Ntrip server, a Ntrip Caster and a Ntrip Client.
> I can't understand if the RTKGPS+ can act as a Ntrip Caster. If it can act
> only as NTRIP server and client, I do need a NTRIP Caster which basically is
> a home-office pc that runs a software (e.g. Lefebure Ntrip Caster) that
> receives and sends the corrections to the rover. However I tried to
> configure the Caster with no success. It must be something with the firewall
> of my network.
>
> Is there any other method so the base can transmit the corrections via the
> internet of the cell phone? For example the TCP Client of the output
> solution how can it be configured?
> If anyone can enlighten me I will appreciate it.
> Thanks!
>
>
>
> --
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