Global Positioning System (GPS) Time Rollover Occurrence

The Global Positioning System (GPS) provides accurate timing information to many of our critical systems – power grid, communications, financial markets, emergency services, and machines or engines to name a few

You may have heard recently about an issue in relation to GPS time rollover occurrences impacting GPS devices. The GPS time rollover occurrence relates to the 10-bit field in a GPS time message  which must be reset every 1024 weeks where everything is reset back to zero. GPS week zero started January 6, 1980. The first GPS time rollover occurred on August 21, 1999. The week counter then reset to zero, and it has been recounting ever since. The next time the counter will rollover to zero is on April 6, 2019

This is an issue affecting GPS devices globally and is not specifically related to Caterpillar machinery. However, we are aware that the GPS time rollover occurrence may impact software in Product Link devices. Please note, there may be no impact at all to Caterpillar machinery as a result of the GPS time rollover occurrence.

To help you prepare, read below for answers to some of the questions you may have.

Your questions answered about the GPS time rollover

  • What is it?
  • When is it happening?
  • How does this impact me if my Cat® equipment is fitted with a Product Link device?
  • What Product Link devices are affected?
  • What is Caterpillar doing to prevent this issue and minimise the impact to me?
  • How do I find out if my equipment is affected by this event?
  • Is the GPS rollover similar to the Y2K event?
  • Will this happen again in the future?

Have questions about the GPS time rollover event? Want to check if your machine will be affected?

Please fill out the contact form below and a member from our Equipment Management Solutions team will be in contact with you.

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