On March 5th, 2019, the 50th Space Wing Public Affairs office published an article discussing the GPS Week Number Rollover. You can find the full article on their website: https://www.schriever.af.mil/News/Article-Display/Article/1776011/gps-week-number-to-rollover/.
The GPS Week Number count began at approximately midnight on the evening of 05 January 1980 / morning of 06 January 1980. Since that time, the count has incremented by 1 each week, and is broadcast as part of the GPS message. The GPS Week Number field can be between 0 and 1023. At the completion of the first week number 1023, the GPS week number rolled over to 0 on midnight GPS Time of the evening of 21 August 1999 / morning of 22 August 1999.
Find more information about the GPS Week Number Rollover on GPS.gov.
Civil GPS users are encouraged to submit reports of GPS problems to the Coast Guard Navigation Center, civil aviation users are encouraged to report GPS anomalies to the Federal Aviation Administration, and military users should contact the GPS Operations Center.
