GPS protocol: The next week number rollover next year

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MavEtJu
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GPS protocol: The next week number rollover next year

Post by MavEtJu » 12 April 18 9:31 am

From https://ics-cert.us-cert.gov/sites/defa ... S_2019.pdf:

In the GPS protocol, the week number field is a ten bit value. So every 1024 weeks it will return to zero.

Week 0 is 5 January 1980. And 21 August 1999. And will be 6 April 2019.

So don't be surprised if your GPS will display the wrong date next year.

Edwin

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J_&_J
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Re: GPS protocol: The next week number rollover next year

Post by J_&_J » 12 April 18 7:45 pm

Geepers! The geocaching community may well experience Y2K type hysteria on the lead up to April 6th next year!

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CraigRat
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Re: GPS protocol: The next week number rollover next year

Post by CraigRat » 12 April 18 8:11 pm

MavEtJu wrote:From https://ics-cert.us-cert.gov/sites/defa ... S_2019.pdf:

In the GPS protocol, the week number field is a ten bit value. So every 1024 weeks it will return to zero.

Week 0 is 5 January 1980. And 21 August 1999. And will be 6 April 2019.
Crikey. I use GPS a lot on sites for clock syncing. Might have to do some reading up :shock:

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gmj3191
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Re: GPS protocol: The next week number rollover next year

Post by gmj3191 » 22 July 18 11:37 am

I'm sure the firmware/software in GPS units and smartphones managing the GPS chip and functions will take care of this.

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