Does it have a saved/surveyed position? With a saved position you can reasonable time performance with 1 sat. Without a saved position all bets are off, there is no way for the receiver to determine the receiver/satellite clock difference. Trimble reports that the device is in "over-determined clock" mode if that is how it is configured. Even if it is in "over-determined clock" mode the receiver may not have enough data to do anything effective. Trimble's overdetermined clock mode is basically a "position hold" mode. ---------------- >I just re-checked this with a Resolution-T, and it does go into OD mode with all but 1 SV masked from cold restart using a real SV.

On Mon, 6 Mar 2017 00:38:35 +0000, you wrote: >Does it have a saved/surveyed position? With a saved position you can reasonable time performance with 1 sat. Without a saved position all bets are off, there is no way for the receiver to determine the receiver/satellite clock difference. > >Trimble reports that the device is in "over-determined clock" mode if that is how it is configured. Even if it is in "over-determined clock" mode the receiver may not have enough data to do anything effective. Trimble's overdetermined clock mode is basically a "position hold" mode. > It will stay in 2d/3d mode if there is no stored position. With a stored position the Resolution-T does seem to be pretty stable with only 1 SV. With the simulator it will switch to OD mode for about 2 seconds, then its status changes to "no SVs usable" and it stops using the simulated SV. I still have many navigation message changes to test out -- something may work.

Hi > On Mar 6, 2017, at 1:38 AM, Mark Sims <holrum@hotmail.com> wrote: > > Does it have a saved/surveyed position? With a saved position you can reasonable time performance with 1 sat. Without a saved position all bets are off, there is no way for the receiver to determine the receiver/satellite clock difference. > > Trimble reports that the device is in "over-determined clock" mode if that is how it is configured. Even if it is in "over-determined clock" mode the receiver may not have enough data to do anything effective. Trimble's overdetermined clock mode is basically a "position hold" mode. I very much prefer the “position hold” term for what it is doing compared to Trimble’s “overdetermined” description. Overdetermined suggests that it has more information than it needs to come up with the time. Bob > > ---------------- > >> I just re-checked this with a Resolution-T, and it does go into OD mode with all but 1 > SV masked from cold restart using a real SV. > _______________________________________________ > 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.