Post by rubl on Feb 16, 2019 14:44:34 GMT 7
It's like the maximum length of the topic title, but there it just truncates. In GPS weeks it just rolls back to zero 
"Fun fact: GPS uses 10 bits to store the week. That means it runs out... oh heck – April 6, 2019
Nav gadgets will be Gah, Properly Screwed if you don't or can't update firmware
Older satnavs and such devices won't be able to use America's Global Positioning System properly after April 6 unless they've been suitably updated or designed to handle a looming epoch rollover.
GPS signals from satellites include a timestamp, needed in part to calculate one's location, that stores the week number using ten binary bits. That means the week number can have 210 or 1,024 integer values, counting from zero to 1,023 in this case. Every 1,024 weeks, or roughly every 20 years, the counter rolls over from 1,023 to zero.
The first Saturday in April will mark the end of the 1,024th week, after which the counter will spill over from 1,023 to zero. The last time the week number overflowed like this was in 1999, nearly two decades on from the first epoch in January 1980."
www.theregister.co.uk/2019/02/12/current_gps_epoch_ends/
"Fun fact: GPS uses 10 bits to store the week. That means it runs out... oh heck – April 6, 2019
Nav gadgets will be Gah, Properly Screwed if you don't or can't update firmware
Older satnavs and such devices won't be able to use America's Global Positioning System properly after April 6 unless they've been suitably updated or designed to handle a looming epoch rollover.
GPS signals from satellites include a timestamp, needed in part to calculate one's location, that stores the week number using ten binary bits. That means the week number can have 210 or 1,024 integer values, counting from zero to 1,023 in this case. Every 1,024 weeks, or roughly every 20 years, the counter rolls over from 1,023 to zero.
The first Saturday in April will mark the end of the 1,024th week, after which the counter will spill over from 1,023 to zero. The last time the week number overflowed like this was in 1999, nearly two decades on from the first epoch in January 1980."
www.theregister.co.uk/2019/02/12/current_gps_epoch_ends/
