Hi One would *hope* that everybody making multi GNSS modules would be cross checking and taking care of GPS rollover that way. It’s always nice to see them explicitly stating that they are doing it.
Bob > On Feb 6, 2019, at 12:57 AM, Michael Wouters <[email protected]> > wrote: > > 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 <[email protected]> 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 <[email protected]> wrote: >>> >>> >>> [email protected] 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 -- [email protected] >>> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>> and follow the instructions there. >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
