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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.

A Federal Register Notice has been released seeking comment on a proposed plan to reduce the number of Differential GPS sites around the United States. Please read the notice and comment as appropriate.


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 Pahoa DGPS beacon (290 KHz, Site ID 877) terminated at 1500Z (1100EST) April 29, 2015

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 03 Sep 2015
Site Name Site Id BNM # OUTAGE MESSAGE
SCHEDULED / UNSCHEDULED OUTAGES
Annette Island8890414-15
BROADCAST SITE IS UNUSABLE AS OF 09/02/2015 21:33 Z UNTIL FURTHER NOTICE.
Pigeon Point8830382-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/08/2015 16:00 Z TO 09/08/2015 19:00 Z.
Lompoc8820383-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/09/2015 17:00 Z TO 09/09/2015 21:00 Z.
Pueblo8720395-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/14/2015 15:00 Z TO 09/14/2015 17:00 Z.
Tampa (Macdill)8270403-15
BROADCAST SITE IS UNUSABLE AS OF 08/27/2015 00:48 Z UNTIL FURTHER NOTICE.
Upolu Point8790406-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/15/2015 20:00 Z TO 09/16/2015 00:00 Z.
Hagerstown8340373-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/24/2015 13:00 Z TO 09/24/2015 15:00 Z.
Brunswick NAS8000397-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/07/2015 12:00 Z TO 09/07/2015 20:00 Z.
Billings8740356-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/14/2015 15:00 Z TO 09/14/2015 17:00 Z.
Youngstown8390398-15
BROADCAST SITE WILL BE UNUSABLE FROM 10/13/2015 13:00 Z TO 10/13/2015 17:00 Z.
Hawk Run7880375-15
BROADCAST SITE WILL BE UNUSABLE FROM 08/31/2015 11:00 Z TO 09/03/2015 22:00 Z.
Kensington7780407-15
BROADCAST SITE WILL BE UNUSABLE FROM 10/06/2015 14:00 Z TO 10/06/2015 18:00 Z.
Clark8500408-15
BROADCAST SITE WILL BE UNUSABLE FROM 10/05/2015 14:00 Z TO 10/05/2015 18:00 Z.
Aransas Pass8160380-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/08/2015 14:00 Z TO 09/08/2015 16:00 Z.
Mequon7770396-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/14/2015 14:00 Z TO 09/14/2015 18:00 Z.
Gustavus8920405-15
BROADCAST SITE IS OPERATING AT REDUCED POWER AS OF 08/28/2015 08:55 Z UNTIL FURTHER NOTICE.
Medora851N088-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/17/2015 15:00 Z TO 09/17/2015 17:00 Z.
Albuquerque845N082-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/21/2015 15:00 Z TO 09/21/2015 17:00 Z.
Summerfield823N087-15
BROADCAST SITE WILL BE UNUSABLE FROM 09/17/2015 14:00 Z TO 09/17/2015 16:00 Z.
GENERAL INFORMATION
No additional information at this time.