Tag: gps

Coast Guard Discontinues Differential GPS Broadcast

Submitted by the Chief, Office of Navigation Systems (CG-NAV) On June 30, 2020 the Coast Guard switched off the last Differential Global Positioning System (DGPS) signals after more than 25 years of […]

GPS satellite plane/slot and clock information removed from the Operational Advisory message

A graph representing GPS satellite slot and plane designations is now available on the Navigation Center’s Constellation Status page.

3/22/2019: Special notice to mariners – upcoming GPS week number rollover

The Coast Guard Navigation Center published a special notice to mariners that use GPS Equipment. The special notice outlines the details of the GPS Week Number Rollover that will occur April 6-7, 2019.

11/8/2018: U.S. Maritime Advisory 2018-014- GPS Interference in Eastern Mediterranean and Red Seas

Maritime Commons is sharing the content of U.S. Maritime Advisory 2018-014-GPS to inform our readers that significant GPS interference continues to be reported by vessels and aircraft operating in the Eastern Mediterranean Sea near Port Said, Egypt, the Suez Canal, and in the vicinity of the Republic of Cyprus.

10/24/2018: Modifications to GPS space and ground control segment

Commercial and civil users who experience impacts are encouraged to contact the Navigation Center through its website or by phone at (703) 313-5900.

9/17/2018: Reports of GPS problems submitted by public now available on Navigation Center’s website

Reports of GPS problems submitted to Navigation Center through the webpage will be posted to the GPS Problem Report Status webpage after review by NAVCEN staff. Reports will be anonymized to protect the submitter’s personal information and any equipment manufacturer data. All reports made in 2018 are now available and prior years will be available in the future.

6/20/2018: GPS satellite maintenance

GPS users should be aware that there may be a short period of high Horizontal Dilution of Precision (HDOP) / Position Dilution of Precision (PDOP) in two locations June 22-23, 2018.

5/31/2018: Navigation Center visits European counterparts to discuss global satellite system information sharing

The EU is building Galileo, a Global Navigation Satellite System similar to the U.S. GPS, and their GSC has looked at NAVCEN as a model service center for civil GNSS. The bilateral talks are allowing and encouraging full cooperation between the two service centers and NAVCEN is sharing its 30 years of experience in representing civil users in the U.S. GPS program. The two service centers discussed their roles and respective responsibilities to support civil users of GPS and Galileo, along with how they can continue to improve the sharing of relevant navigation information.

5/7/2018: U.S. Maritime Advisory 2018-007 – GPS Interference in Eastern Mediterranean Sea

Maritime Commons is sharing the content of U.S. Maritime Advisory 2018-007 to notify our readers that multiple instances of significant GPS interference have been reported by vessels and aircraft operating in the Eastern Mediterranean Sea since March 18, 2018.

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