How to setup RTKLIB's STRSVR to receive PointPerfect RTCM corrections

Please note, in order to serve the correction data to your receiver, the PointPerfect RTCM NTRIP caster needs to know about your approx. position.

Therefore, it is essential, that the receiver is passing the GGA string from the NMEA to the caster at connection start and periodically after that. U-center will do this automatically when NMEA is enabled as output at the receiver, while the STRSVR does not.

Setup STRSVR

To solve the issue with STRSVR you can inject the GGA NMEA in STRSVR itself.

1. Click on “Cmd” after setting up the NTRIP Client with the caster information and credentials
2. Activate “Commands at startup” and insert a valid GGA for your position

Example for a location in Hanover, Germany: $GPGGA,091736.168,5222.549,N,00943.522,E,1,12,1.0,0.0,M,0.0,M,,*6F

3. Activate “Periodic Commands” and insert the same GGA string as above and end the string with “#10000” to repeat the command every 10 seconds

Example for a location in Hanover, Germany: $GPGGA,091736.168,5222.549,N,00943.522,E,1,12,1.0,0.0,M,0.0,M,,*6F#10000

Note: If you don´t know the NMEA GGA string from your position you may find this tool helpful to generate one: https://nmeagen.org/. Since this is always repeating the same GGA string it should be only used within static testing that has no movement.