STRSVR - RTK corrections from NTRIP to Serial (Novatel)

[snehagn]

Hi,

Has anyone successfully sent RTK data (RTCM3) on strsvr from a NTRIP Client to Serial for a Novatel receiver? I can see the RTK data being received and sent on strsvr (green and increasing bytes), but inside Novatel, I do not see the data being read. I would like to understand the configuration on both sides.

Any help is appreciated.

Thanks, Sneha

[Pedrous]

Hi snehagn,

Did you solve this problem? I am facing the same problem.

[snehagn]

Hi @Pedrous - I decided to use the BKG Ntrip Client on Linux. That worked well for me for a single base station. I should probably leave this thread open in case anyone can solve it. Thanks!

[Pedrous]

Hi,

I am using a Novatel SPAN-IGM-S1 and I can confirm that I was able to forward the RTK corrections from an ntrip caster through USB serial port to the Novatel device. I used RTKlib str2str commandline tool and my command was:

str2str -in ntrip://xxxx:xxxx@195.156.69.177:2103/R31_MET3 -out serial://ttyUSB4:115200:8:n:1

The username and password are hidden with xxxx.

Some observations:

• First of all I was first trying to use mountpoint RAW_MET3 (The mountpoint details can be viewed in 195.156.69.177:2103 for anyone interested) but that didn't work, I don't know if the reason is that it is in RTCM3V2 format but the R31_MET3 mountpoint works and it is in RTCM3V1 format.
• Secondly I first tried to use the command with #rtcm3 specifiers in -in and -out followingly: str2str -in ntrip://xxxx:xxxx@195.156.69.177:2103/R31_MET3#RTCM3 -out serial://ttyUSB4:115200:8:n:1#RTCM3 but it seems like that it changes the format such that Novatel device cannot interpret the data afterwards.

This solution is for using only one base, next I would need to use a caster for several bases to choose the correct one and I don't know how RTKlib can send the corrections to the caster to select the closest base station. If someone knows how, that information would be greatly appreciated. Thanks!