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The GPS week number rollover is a phenomenon that happens every 1,024 weeks, which is about 19.6 years. The Global Positioning System (GPS) broadcasts a date, including a week number counter that is stored in only ten binary digits , whose range is therefore 0–1,023.
GPS dates are expressed as a week number and a day-of-week number, with the week number initially using a ten-bit value and modernised GPS navigation messages using a 13-bit field. Ten-bit systems would roll over every 1024 weeks (about 19.6 years) after Sunday 6 January 1980 (the GPS epoch ), and 13-bit systems roll over every 8192 weeks.
GPS time is expressed with a resolution of 1.5 seconds as a week number and a time of week count (TOW). [13] Its zero point (week 0, TOW 0) is defined to be 1980-01-06T00:00Z. The TOW count is a value ranging from 0 to 403,199 whose meaning is the number of 1.5 second periods elapsed since the beginning of the GPS week.
As opposed to the year, month, and day format of the Gregorian calendar, the GPS date is expressed as a week number and a seconds-into-week number. The week number is transmitted as a ten-bit field in the C/A and P(Y) navigation messages, and so it becomes zero again every 1,024 weeks (19.6 years). GPS week zero started at 00:00:00 UTC (00:00: ...
Time formatting and storage bugs lists other similar problems, often caused by rollover similar to the cause of this year 2038 problem. A GPS week number rollover will coincidentally happen later in 2038, for a different reason than this year 2038 problem.
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AN/PSN-13 Defense Advanced GPS Receiver; Assisted GNSS; Automated Flight Following; ... GPS watch; GPS week number rollover; GPS animal tracking; GPS-based game; Gpsd ...
There was a GPS week rollover problem in some Honda GPS systems, where the clock would only say 0:00. Sometime later it started working again. The problem started, I believe, about August 18th 2017. I am not sure of the GPS week boundaries. Gah4 08:06, 27 November 2020 (UTC) Checking on web reports, clocks started working again August 19th, 2019