Hi @Yuri_Rage
i am using Skytraq PX1175RH GNSS unit on arducopter.
everything working as expected like GPS positioning(3D FIX) and GPS for Yaw (Moving baseline) normally.
but only thing i worried is GPS (Delta) varying between 180ms to 220ms as its not maintaining 200ms, however Ardupilot doesn’t throw any prearm error like GPS Not Healthy etc…
i have checked update rate of the GNSS unit is set to 5hz only on Skytraq GNSS viewer.
these are the messages it sends to flight controller.
1.GGA
2.RMC
3.VTG
4.HDT
5.PSTI 032
6.PSTI 035