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Nationwide Differential GPS (NDGPS)
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DGPS SITE CONFIGURATION AND OUTAGE INFORMATION

Outage information is shown next to each site. It is requested that users notify the Navigation Information Services Watchstander at (703) 313-5900 or via email regarding any observed outages, problems, or requests.

The U.S. Coast Guard DGPS service is available for positioning and navigation. Users may experience service interruptions without advance notice. U.S. Coast guard DGPS broadcasts should not be used under any circumstances where a sudden system failure or inaccuracy could constitute a safety hazard. Differential corrections are based on the NAD83 (2011) position of the reference station (REFSTA) antenna. Positions obtained using DGPS should be referenced to NAD 83 coordinate system only. All sites are broadcasting RTCM Type 9-3 correction messages.

Notes:

1. The DGPS beacon (290 KHz, Site ID 877) is unusable as of 1900Z December 21, 2014 until further notice. Impacts to the DGPS beacon service in Hawaii can be viewed here (clicking on the link will open a new browser window).

2. The Omaha DGPS beacon (298 KHz, Site ID 868) terminated at 1500Z (1100EST) May 15, 2013.

For further inquiries, please contact the Navigation Information Service (NIS) via our Contact Us page or via phone at 703-313-5900.

Please report DGPS problems or outages at our report-a-problem page. Thank you in advance.


CURRENT DGPS ADVISORIES FOR 31 Mar 2015
Site Name Site Id BNM # OUTAGE MESSAGE
SCHEDULED / UNSCHEDULED OUTAGES
Biorka8900137-15
BROADCAST SITE WILL BE UNUSABLE FROM 05/05/2015 17:00 Z TO 05/05/2015 19:00 Z.
Flagstaff876N027-15
BROADCAST SITE IS UNUSABLE AS OF 03/30/2015 16:52 Z UNTIL FURTHER NOTICE.
Lompoc8820121-15
BROADCAST SITE IS UNUSABLE AS OF 03/16/2015 17:12 Z UNTIL FURTHER NOTICE.
Chico8780127-15
BROADCAST SITE WILL BE UNUSABLE FROM 03/31/2015 15:00 Z TO 04/09/2015 02:00 Z.
Tampa (Macdill)8270138-15
BROADCAST SITE WILL BE UNUSABLE FROM 03/29/2015 12:30 Z TO 04/01/2015 12:30 Z.
Savannah8180145-15
BROADCAST SITE WILL BE UNUSABLE FROM 04/07/2015 13:00 Z TO 04/07/2015 15:00 Z.
Pahoa8770603-14
BROADCAST SITE IS UNUSABLE AS OF 12/21/2014 19:00 Z UNTIL FURTHER NOTICE  DUE TO APPROACHING VOLCANIC ACTIVITY.
Hagerstown8340140-15
BROADCAST SITE WILL BE UNUSABLE FROM 04/16/2015 13:00 Z TO 04/16/2015 15:00 Z.
Billings874N024-15
BROADCAST SITE WILL BE UNUSABLE FROM 04/20/2015 15:00 Z TO 04/20/2015 17:00 Z.
Hawk Run7880065-15
BROADCAST SITE WILL BE UNUSABLE FROM 04/06/2015 14:00 Z TO 04/06/2015 16:00 Z.
Kensington7780141-15
BROADCAST SITE WILL BE UNUSABLE FROM 04/07/2015 15:00 Z TO 04/07/2015 18:00 Z.
Aransas Pass8160136-15
BROADCAST SITE WILL BE UNUSABLE FROM 04/08/2015 14:00 Z TO 04/08/2015 16:00 Z.
St. Marys8430146-15
BROADCAST SITE WILL BE UNUSABLE FROM 04/13/2015 13:00 Z TO 04/13/2015 15:00 Z.
Flagstaff876N008-15
BROADCAST SITE WILL BE UNUSABLE FROM 04/02/2015 16:00 Z TO 04/04/2015 18:00 Z.
GENERAL INFORMATION
No additional information at this time.