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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: At 1200Z (0800 EDT) the following DGPS beacon signals will be terminated.
  • 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 21 Sep 2018
Site Name Site Id BNM # OUTAGE MESSAGE
SCHEDULED / UNSCHEDULED OUTAGES
Penobscot7990278-18
BROADCAST SITE WILL BE UNUSABLE FROM 10/01/2018 13:00 Z TO 10/01/2018 23:00 Z.
Lincoln7640253-18
BROADCAST SITE STATUS IS UNCONFIRMED DUE TO NETWORK OUTAGE AS OF 08/28/2018 16:39 Z UNTIL FURTHER NOTICE.
GENERAL INFORMATION
Pigeon Point8830275-18
DGPS BROADCAST SITE WILL PERMANENTLY CEASE BROADCASTING CORRECTIONS ON 301400Z SEP 18
Annapolis8470271-18
DGPS BROADCST SITE WILL PERMANENTLY CEASE BROADCSTING CORRECTIONS ON 301400Z SEP 18.
Bobo7920272-18
DGPS BROADCAST SITE WILL PERMANENTLY CEASE BROADCASTING CORRECTIONS ON 301400Z SEP 18.
New Bern7710273-18
DGPS BROADCAST SITE WILL PERMANENTLY CEASE BRODCASTING CORRECTIONS ON 301400Z SEP 18.
Robinson Point8870274-18
DGPS BROADCAST SITE WILL PERMANENTLY CEASE BROADCASTING CORRECTIONS ON 301400Z SEP 18.