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Nationwide Differential GPS (NDGPS)
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DGPS SITE CONFIGURATION 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.

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

Note: The following DGPS beacon signals were terminated on September 30, 2018.
  • Pigeon Point, CA (287 KHZ, Site ID 883)
  • Robinson Point, WA (323 KHZ, Site ID 887)
  • Annapolis, MD (301 KHZ, Site ID 847)
  • Bobo, MS (297 KHZ, Site ID 792)
  • New Bern, NC (294 KHZ, Site ID 771)
For inquiries, please contact the Navigation Information Service (NIS) via our Contact Us page or via phone at 703-313-5900.

CURRENT DGPS ADVISORIES FOR 23 Aug 2019
Site Name Site Id BNM # OUTAGE MESSAGE
SCHEDULED / UNSCHEDULED OUTAGES
Level Island8910186-19
BROADCAST SITE IS UNUSABLE AS OF 08/15/2019 23:12 Z UNTIL FURTHER NOTICE.
Cheboygan8360182-19
BROADCAST SITE WILL BE UNUSABLE FROM 09/24/2019 14:00 Z TO 09/24/2019 15:00 Z.
Angleton8280158-19
BROADCAST SITE IS UNUSABLE AS OF 07/09/2019 23:19 Z UNTIL FURTHER NOTICE.
Mequon7770136-19
BROADCAST SITE IS UNUSABLE AS OF 06/22/2019 22:39 Z UNTIL FURTHER NOTICE.
GENERAL INFORMATION
No additional information at this time.