BeiDou, Galileo and GLONASS all broadcast UTC time of day (or thereabouts for GLONASS - it's offset by the timezone for Moscow) so any multi-GNSS receiver has a sanity check on UTC calculated from GPS.
Michael On Wed, 6 Feb 2019 at 11:03 am, Bob kb8tq <kb...@n1k.org> wrote: > Hi > > From what I can see, you can send it a command that puts a new “oldest > date” > number into flash. Since it also tracks Glonass and Galileo, that will > stretch out the > time before you *need* to do something (like into the next century). They > also have > the “no dates before the firmware was issued” check. There may be other > date > checks in there. Those are just what I’ve found so far. > > It also is likely that the “new” GPS sats will be flying within 19 years. > That will add > more bits to the GPS time fields. Who knows if the “modern” modules > already handle > those bits or not …. > > Bob > > > On Feb 5, 2019, at 5:23 PM, Hal Murray <hmur...@megapathdsl.net> wrote: > > > > > > kb...@n1k.org said: > >> The F9P has multiple cross checks, traps, and even a user configurable > >> “oldest possible date” entry. > > > > Neat/thanks. > > > > Is that stored in flash, or lost on power cycle? > > > > If it's in flash, I can "fix" things for another 20 years by extracting > the > > device from its box, taking it to a bench setup, running a flash-update > > program, then reassembling things. As ugly as that is, it may be > simpler than > > updating the firmware in the box. > > > > > > -- > > These are my opinions. I hate spam. > > > > > > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.