[FOSS-GPS] PPP with RTKLib: RINEX O- and N- files?

Anders Wallin anders.e.e.wallin at gmail.com
Sat Dec 21 07:51:47 PST 2013

Thanks for the tip!
By extracting the receiver clock bias from the status-file, and playing
around with the RTKPOST settings I now get better results:

There's still a 4 ns offset between the CSRS and RTKLib solutions - I don't
know where it comes from??

ESA gLAB arrives at the same result as CSRS, so maybe I will look closely
at the gLAB settings next.

Thanks for your help - I will try to write a blog post about my findings
if/when I get at least three methods to agree on the results (CSRS, gLAB,


On Sat, Dec 21, 2013 at 12:07 AM, Felipe G. Nievinski <fgnievinski at gmail.com
> wrote:

> I don't think you should use the time tag in the .pos file.
> I'd use instead the CLK records in the .stat file.
> See Appendix B.3 in the docs, "Solution Status File":
> *Receiver Clock‐bias States*
> *Estimated receiver clock bias parameters. The format of a record is as
> follows.*
> *$CLK,week,tow,stat,rcv,clk1,clk2,clk3,clk4*
> *week/tow : gps week no/time of week (s)*
> *stat : solution status*
> *rcv : receiver (1:rover,2:base station)*
> *clk1 : receiver clock bias GPS (ns)*
> *clk2 : receiver clock bias GLONASS (ns)*
> *clk3 : reserved*
> *clk4 : reserved*
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