GPS·C

GPS·C, short for GPS Correction, was a Differential GPS data source for most of Canada maintained by the Canadian Active Control System, part of Natural Resources Canada. When used with an appropriate receiver, GPS·C improved real-time accuracy to about 1–2 meters, from a nominal 15 m accuracy.

Real-time data was collected at fourteen permanent ground stations spread across Canada, and forwarded to the central station, "NRC1", in Ottawa for processing.

Visiting the external webpage for this service on 2011-11-04, there is only a note saying that the service had been discontinued on 2011-04-01. There is a PDF link on that page to possible alternatives.

CDGPS

GPS·C information was broadcast Canada-wide on MSAT by the CDGPS, short for Canada-Wide DGPS Correction Service. CDGPS required a separate MSAT receiver, which output correction information in the RTCM format for input into any suitably equipped GPS receiver. The need for a separate receiver made it less cost-effective than solutions like WAAS or StarFire, which receive their correction information using the same antenna and receiver.

CDGPS Reference Stations^[1]

Station name	Location	Operational Date	Coordinates
ALBH	Canadian Forces Base, Esquimalt, British Columbia (near Victoria, British Columbia)	May 1992	48°23′23.2″N 123°29′14.8″W / 48.389778°N 123.487444°W
ALGO	Algonquin Space Complex, Algonquin Provincial Park, Ontario	January 1991	45°57′20.8″N 78°4′16.9″W / 45.955778°N 78.071361°W
CHUR	Geological Survey of Canada regional seismic station, Churchill, Manitoba	April 1993	58°45′32.6″N 94°5′19.4″W / 58.759056°N 94.088722°W
DRAO	Dominion Radio Astrophysical Observatory, Penticton, British Columbia	February 1991	49°19′21.4″N 119°37′27.9″W / 49.322611°N 119.624417°W
EUR2	New Environment Canada Weather Station building, Eureka, Nunavut	October 9, 2005	79°59′20.2″N 85°56′15.2″W / 79.988944°N 85.937556°W
FRDN	Hugh John Fleming Forestry Complex, near the University of New Brunswick in Fredericton, New Brunswick	February 2003	45°56′0.6″N 66°39′35.6″W / 45.933500°N 66.659889°W
HLFX	Bedford Institute of Oceanography, Dartmouth, Nova Scotia	December 19, 2001	44°41′0.7″N 63°36′40.6″W / 44.683528°N 63.611278°W
NRC1	Institute for National Measurement Standards, National Research Centre, Ottawa, Ontario	April 1995	45°27′15.0″N 75°37′25.8″W / 45.454167°N 75.623833°W
PRDS	Dominion Observatory in Priddis, Alberta (near Calgary, Alberta)	January 7, 1997	50°52′16.8″N 114°17′36.5″W / 50.871333°N 114.293472°W
SCH2	Transport Canada radio telecommunication facility, Schefferville, Quebec	June 29, 1997	54°49′55.5″N 66°49′57.4″W / 54.832083°N 66.832611°W
STJO	Geological Survey of Canada (NRCan) geomagnetic observing station, St. John's, Newfoundland	May 1992	47°35′42.8″N 52°40′39.9″W / 47.595222°N 52.677750°W
WHIT	Whitehorse, Yukon	June 1996	60°45′01.8″N 135°13′19.5″W / 60.750500°N 135.222083°W
WINN	NavCanada Winnipeg Area Control Centre building, Winnipeg, Manitoba	January 9, 1997	49°54′02.1″N 97°15′34.1″W / 49.900583°N 97.259472°W
YELL	Yellowknife, Northwest Territories	January 1991	62°28′51.2″N 114°28′50.4″W / 62.480889°N 114.480667°W

Shutdown

On April 9, 2010, it was announced that the service would be discontinued by March 31, 2011. The service was decommissioned on March 31, 2011 and finally terminated on April 1, 2011, at 9:00 EDT.^[2]

References

1. "Active Control Point Stations". Retrieved 2006-11-27. (login needed)
2. Gary Sawayama (April 1, 2011). "CDGPS Termination Announcement" (PDF) (Press release). Retrieved August 3, 2012.

External links

• CDGPS (Canada-Wide DGPS Correction Service)
• GPS·C Distribution Using NTRIP — PDF format