[time-nuts] Z3801A gps week rollover

Hal Murray hmurray at megapathdsl.net
Thu Sep 8 17:53:53 EDT 2016


petervince1952 at gmail.com said:
> Can I just ask why the Z3801As are  having week roll-over problems now - I
> didn't think it was 2048 weeks since GPS "zero-hour" until late on the 6th
> of April 2019? 

It's probably 1024 weeks since a date was built into the firmware.

It's like the year 2000 problem.  If you aren't worried about old people and 
I tell you somebody was born in 03, you can assume that's 2003 rather than 
1903.  For GPS, a handy value for the cutoff is the date the firmware was 
built.  Any date that looks like it is older than the firmware is probably 
off by a rollover.


-- 
These are my opinions.  I hate spam.






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