Advance Notification of GPS Event That Could Affect COSPAS-SARSAT System Components

In February 2019, the COSPAS-SARSAT Council published a paper providing advance notification of the GPS Week Number Rollover event that could affect COSPAS-SARSAT system components. The paper discusses the possible impacts as a result of the GPS Week Number Rollover that will occur on April 6-7, 2019.

Purpose: This paper provides the background and information on an event that will occur 6 April 2019 with the GPS timing signal that could have an effect on the GPS timing calculations on various components in the Cospas-Sarsat System.

Description of topic: This paper is supplying information on the GPS rollover event and is intended to alert Cospas-Sarsat Participants of possible impacts.

Find the full text of the paper on NAVCEN’s website:

Find more information about the GPS Week Number Rollover on

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.