> > I want to log the UBX-TIM-TP message (in particular the quantization
> > error of the timepulse), using the python gps module if possible.
I have been working on this today, but I'm not ready to push today.
My test gpsd now puts the TIM-TP qErr in the PPS JSON message. That
gets sent at the right time, and is with its PPS friends.
The expanded message looks like this:
{"class":"PPS","device":"/dev/ttyS0","real_sec":1570153135,"real_nsec":0,"clock_sec":1570153135,"clock_nsec":3350,"precision":-20,"qErr":-1681}
It should work fine with Python. You just need to build from git head.
That sounds good! I will try looking at the current PPS message asap, and building from the latest gitlab when you have pushed this.
I'll also use qErr to adjust the PPS as sent top NTP. The difference
will likely be buried in clock jitter.
For time-transfer based on post-processing of RINEX/CGGTTS [1] I am hoping the qErr correction will make a clear improvement.
AW
(hardware setup on p29/46)