Gary E. Miller writes: > Which I always thought was pointless, that only works for a fixed > antenna. Any GPS in a fixed position lab will have a good rooftop > antenna with clear skyview.
Except when it doesn't and then the ability to survive on fewer visible/good satellites without going into holdover is most welcome. > Except that requires a post process step, so not useful for real time. No, you can very much use it to inform a consumer of the PPS in realtime about the sub-quantization phase shift and have the PLL take this error refinement into account. > I just looked at the 'U-blox 8 Receiver Description' and it makes no > mention of sawtooh anything. Is that in a different doc? No, it's in there, look for the UBX-TIM series of messages, specifically TOS and TP. However, it talks about offsets of the time pulse, not a sawtooth. But there's a more specific description for series 6 timing receivers, most if not all of which will be applicable to your series 8 module as well: https://www.u-blox.com/sites/default/files/products/documents/Timing_AppNote_(GPS.G6-X-11007).pdf > I'll also test Surevey-In mode to see how much that helps. _Any_ error in the surveyed position will show up as timing error that also depends on the GPS constellation. I think Lady Heather provides a special plot to map these deviations to the GPS sky tracks. Regards, Achim. -- +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+ SD adaptations for Waldorf Q V3.00R3 and Q+ V3.54R2: http://Synth.Stromeko.net/Downloads.html#WaldorfSDada _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
