[FOSS-GPS] age of differential: rtkpost vs rtknavi

Michele Bavaro mic.bavaro at yahoo.co.uk
Mon May 23 02:08:32 PDT 2016

I am using two M8Ts and doing GPS L1 kinematic.The base and rover binary streams come to rtkrcv via TCP client socket connection.Stream are also logged for post-processing.
RTKLIB seems to handle age of differential well in post-processing (rnx2rtkp or rtkpost).However when a large gap (e.g. 20 minutes) of base observations happens as the base obs TCP client stream goes quiet, rtkrcv or rtknavi exhibit a large outlier when the obs actually come back. It takes a long time to get back on the correct position after such outlier.This seems to be related to some EKF parameters not being correctly re-initialised between a socket going idle and then live again after a relatively long time.Does anybody know where in the code this could be fixed? I am tracing it down but if someone already experienced the problem it would help me a lot.

    On Monday, 23 May 2016, 7:08, Bipin Adaki <bipin.adaki at gmail.com> wrote:

 I am currently working on a asset tracking project, in which i need submeter level accuracy. for the same i am using the Ublox7P(Rover over serial port for testing) and 6M (Base station over serial port). When I start RTKNAVI with settings shown in the link, RTK is not able to display the satellite SNR for the 6M module, for same settings I am able to see the SNR for 7P module and the module is working fine with U-center. I tried replacing the rover and base station still for 6M it does not show the SNR. But in streams it shows data is coming continuously. 

Please help me. 
RegardsBipin Aadaki
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