GPS reset…

Today, at 0000Z, the GPS constellation will roll over as it resets the week number back to all zeros…

Thus, the WN parameter in the GPS navigation message “rolls over” to zero every 1024 weeks starting from 0000Z January 6, 1980. The next WN rollover will occur April 6, 2019. The IS-GPS-200H interface specification identifies both the ten bit WN parameter and the WN rollover events. A GPS device that conforms to the latest IS-GPS-200 and provides UTC should not be adversely affected.

DHS bulletin is HERE.

So if your GPS suddenly thinks you’re in New Mexico, or Virginia, hopefully it will fix itself after a bit…

YMMV and Location… may vary… Just sayin’ 🙂


Comments

GPS reset… — 22 Comments

  1. So, keep an eye out for accidents involving automated driving experiments today?

  2. Bob- Probably!

    PK- Snerk…

    Frank- We shall see…

    WSF/Brig/TXRed- Y’all and me both! I’ve seen GPS ‘wander off’ before…

    CP- If it’s a Garmin, you ‘might’ have a problem.

    • Oh No – the one in my car seemed okay earlier to day – bu then again both of my destinations were well known to me!

    • Oh, boy….the GPS that Kenwwod used in my Nav Receiver in the Jeep is a Garmin.

      Glad to have a couple of Magellan and Motorola units for back-up!

    • Garmin’s website claims “the vast majority of Garmin products” are unaffected. I gave them feedback that a little more specificity would be nice…

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