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.