Notice Advisory to Navstar Users

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A Notice Advisory to Navstar Users (NANU) is a message issued jointly by the United States Coast Guard and the GPS Operations Center at Schriever Space Force Base in Colorado. [1] Such notices (NANUs) provide updates on the general health of individual satellites in the GPS constellation. NANUs are typically issued approximately three days prior to a change in the operation of a GPS satellite, such as a change in orbit or scheduled on-board equipment maintenance.

Contents

NANU types

Forecast outages

Unscheduled outages

Other

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References

  1. "NANU Abbreviations and Descriptions". NavCen.USCG.gov. USCG Navigation Center. Retrieved 15 February 2023.