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+--- Thread: Anyone notice GPS Rollover Problem? (/thread-12767.html)
Anyone notice GPS Rollover Problem? - Bill (Smithville NJ) - 04-09-2019 04:07 PM
April 6 has come and gone with only minor GPS data rollover problems - at least on the newer units.
Just for curiosity, I powered up my MIO C310 handheld GPS. This is a nice little unit that I purchased back in 2000. Haven't used it for a few years since the latest car had a GPS built-in and the cell phones work so well for navigating.
After a few minutes, it acquired enough satellites to display what it thinks is the date. I was expecting it to be 1999.
But was really surprised when it showed January 1, 1601.
Did anyone here get similar errors on their old GPS units?
Bill
Smithville, NJ
RE: Anyone notice GPS Rollover Problem? - SammysHP - 04-09-2019 04:35 PM
Yes, I have date issues on my Garmin Legend HCx.
RE: Anyone notice GPS Rollover Problem? - DA74254 - 04-09-2019 04:36 PM
I haven't checked my own oldest yet; a Garmin eTrex Legend from 2003. I'm currently at work (seaman) and eager to check when I return home in abt a fortnight
Alas, Garmin claims it should work correctly positionwise but the date and time may be incorrect.
RE: Anyone notice GPS Rollover Problem? - smp - 04-09-2019 06:15 PM
My Garmin Nuvi 2555 got a small software update a couple of days ago.
I assume it had something to do with avoiding/solving this issue.
smp
RE: Anyone notice GPS Rollover Problem? - Bill (Smithville NJ) - 04-10-2019 07:22 PM
I just powered up the second Mio C310 (I had originally bought three of them).
It also shows January 1, 1601.
I wonder why it rolled over to 1601 instead of 1999.
Did anyone else get a bad date other than 1999?
73
Bill Smithville, NJ
RE: Anyone notice GPS Rollover Problem? - EugeneNine - 04-11-2019 01:16 AM
ǝɹǝɥ ɯǝlqoɹd ɹǝʌolloɹ ou
RE: Anyone notice GPS Rollover Problem? - Steve Keeley - 04-11-2019 10:45 AM
I just fired up my Garmin E-trex Summit from 2000. (I can't remember the last time I had it turned on.) After letting it find 4 satellites I checked the date and it read 11-APR-19.
RE: Anyone notice GPS Rollover Problem? - Sylvain Cote - 04-11-2019 11:52 AM
ArsTechnica Article
GPS’ UTC clock, used for more than navigation, is about to reset. There might be some surprises.
USA NCCIC/NCC GPS Warning Document
MEMORANDUM FOR U.S. OWNERS AND OPERATORS USING GPS TO OBTAIN UTC TIME
RE: Anyone notice GPS Rollover Problem? - Maximilian Hohmann - 04-11-2019 02:19 PM
Hello!
I haven't had any problems with any GPS device so far. Luckily, because the business jet I fly for a living is nearly 20 years old.
But these guys here seem to have some serious problems (our friend Geoff here flies that type, I hope he is not left stranded somewhere!):
http://newsinflight.com/2019/04/08/15-boeing-787s-grounded-in-china-due-to-gps-rollover-issue/
Regards
Max
RE: Anyone notice GPS Rollover Problem? - Zaphod - 04-12-2019 07:54 PM
(04-09-2019 04:07 PM)Bill (Smithville NJ) Wrote: But was really surprised when it showed January 1, 1601.
January 1 1601 is the date from which ANSI dates are counted.
Quote:ANSI Date
ANSI dates are counted from 1601-01-01 and were adopted by the American National Standards Institute for use with COBOL and other computer languages. This epoch is the beginning of the last 400-year cycle by which leap-years are calculated in the Gregorian calendar. The last year of this cycle is the only one divisible by 100 that is a leap-year, which was the year 2000, and which was followed by a new 400-year cycle beginning with 2001. 32-bit versions of the Microsoft Windows operating system count units of one hundred nanoseconds from this epoch.
RE: Anyone notice GPS Rollover Problem? - Jlouis - 04-12-2019 11:30 PM
(04-09-2019 04:07 PM)Bill (Smithville NJ) Wrote: But was really surprised when it showed January 1, 1601.
Bill
Smithville, NJ
Hmmm, now I have sure that Colombo and Cabral had a GPS back then and what they discovered was not an accident...
RE: Anyone notice GPS Rollover Problem? - Bill (Smithville NJ) - 04-13-2019 12:46 AM
(04-12-2019 07:54 PM)Zaphod Wrote:(04-09-2019 04:07 PM)Bill (Smithville NJ) Wrote: But was really surprised when it showed January 1, 1601.
January 1 1601 is the date from which ANSI dates are counted.
Thanks for pointing that out. I never knew that ANSI had a date epoch.
I knew Unix had a date epoch of Jan 1, 1970, but never really thought about what windows used.
So far, my Mio GPS units are the only ones that I have seen using 1601. All my friends units have all come up with1999.
I learn something new every time I come to this forum.
Bill
Smithville, NJ