Hi Survey is pretty much a bad thing while in motion :)
Some (but not all) GPS modules allow you to set up in a “mobile / do not survey” mode. This is one area that the newer ( = not 1997 era) devices do much better at. It also is something that SBAS / EGNOS / WAAS may indeed help you out on. You may be changing *many* settings on the part to make it behave in a mobile setting. There are a few bugs you just may turn up while doing this …. Bob > On Oct 17, 2016, at 1:38 PM, Nick Sayer via time-nuts <time-nuts@febo.com> > wrote: > > Speaking for my GPSDOs specifically, you can’t disable the survey mode with > the Venus838 receiver (well, you can, but it requires you to talk to the > module with SkyTraq’s software, which requires disabling the GPSDO’s > controller - possible to do, but annoying). I haven’t attempted to see what > it would do if it were moved after the survey is completed (if you move > during the survey, then the survey will fail and repeat). > > The older GPSDOs that had PA6H receivers were navigation receivers that > didn’t have a survey mode. > > In either case, without a surveyed position, PPS stability will suffer > if/when the constellation degrades due to poor reception, which can happen > if, say, the unit is in a moving vehicle in interesting terrain. Poor PPS > stability will have an impact on the PLL, obviously. > >> On Oct 16, 2016, at 9:19 PM, Joseph Gray <jg...@zianet.com> wrote: >> >> I'm curious to know how accurately a GPSDO will keep its 10 MHz output >> while moving. No initial survey to set a position would be done. I >> don't care about the UTC time. >> >> Joe Gray >> W5JG >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
