U.S. Coast Guard (USCG) Maritime Differential GPS (DGPS) Locations

Metadata Updated: October 5, 2018

NAVCEN operates the Coast Guard Maritime Differential GPS (DGPS) Service and the developing Nationwide DGPS Service (NDGPS), consisting of two control centers and 86 remote broadcast sites. The Service broadcasts correction signals on marine radiobeacon frequencies to improve the accuracy and integrity to GPS-derived positions. The Coast Guard DGPS Service provides 10-meter accuracy in all established coverage areas. Typically, the position error of a DGPS position is 1 to 3 meters, greatly enhancing harbor entrance and approach navigation. The System provides service for coastal coverage of the continental U.S., the Great Lakes, Puerto Rico, portions of Alaska, Hawaii, and a large part of the Mississippi River Basin. Many foreign nations are implementing standard DGPS services modeled after the U.S. Coast Guard?s system to improve maritime safety in their critical waterways. The Coast Guard's maritime Differential Global Positioning Service achieved Full Operational Capability (FOC) on 15 March 1999 as announced in the DOT press release. The maritime DGPS service provides 10 meter (2 dRMS) navigation accuracy, integrity alarms for GPS and DGPS out-of-tolerance conditions within 10 seconds of detection, availability of 99.7% per month, coastal coverage to the continental United States, the Great Lakes, Puerto Rico/US Virgin Islands, and selected portions of Alaska and Hawaii. The achievement of FOC culminates a six-year effort to convert existing radiobeacon sites and construct new sites to transmit DGPS corrections. Several equipment upgrades were installed to improve system performance. During the procurement and installation phases of the system upgrades, the maritime DGPS service operated under Initial Operational Capability rules, where the signals provided accurate corrections with integrity to the maximum extent possible.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date May 27, 2016
Metadata Updated Date October 5, 2018

Metadata Source

Harvested from DHS datajson source

Additional Metadata

Resource Type Dataset
Metadata Created Date May 27, 2016
Metadata Updated Date October 5, 2018
Publisher Under Secretary / Management
Unique Identifier 2760
Maintainer
HIFLD HIFLD (MGMT)
Maintainer Email
Public Access Level public
Accesslevelcomment Continental United States, Alaska, Hawaii & Puerto Rico
Bureau Code 024:10
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Harvest Object Id c011570f-66ea-4578-8004-ffc12dbedf0f
Harvest Source Id bd9faa28-bbb6-45f3-a4f0-d302a4a61802
Harvest Source Title DHS datajson source
Data Last Modified 2018-07-03
Program Code 024:000
Source Datajson Identifier True
Source Hash 5301fd3ff4889c2be85fe487cd8be2e942645b9c
Source Schema Version 1.1

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