It is regretful to announce that there is a possibility that some of our GPS products (please see the list below) may face GPS errors after the 17th of March 2019, due to the problem of GPS week number rollover.

The GPS system is synchronized to a different time scale than Coordinated Universal Time (UTC) and calculates time by counting the number of weeks up to 1,023rd week. After week 1,023, the week number count is reset to zero. This is called "GPS week number rollover". Subsequently, the erroneous date information on the GPS receiver clock may result in instability in positioning, causing position errors, including failure of GPS position acquisition, etc.