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 nameLocationOperational DateCoordinates
ALBHCanadian Forces Base, Esquimalt, British Columbia (near Victoria, British Columbia)1 May 199248°23′23.2″N 123°29′14.8″W
ALGOAlgonquin Space Complex, Algonquin Provincial Park, Ontario1 January 199145°57′20.8″N 78°4′16.9″W
CHURGeological Survey of Canada regional seismic station, Churchill, Manitoba1 April 199358°45′32.6″N 94°5′19.4″W
DRAODominion Radio Astrophysical Observatory, Penticton, British Columbia1 February 199149°19′21.4″N 119°37′27.9″W
EUR2New Environment Canada Weather Station building, Eureka, Nunavut9 October 200579°59′20.2″N 85°56′15.2″W
FRDNHugh John Fleming Forestry Complex, near the University of New Brunswick in Fredericton, New Brunswick1 February 200345°56′0.6″N 66°39′35.6″W
HLFXBedford Institute of Oceanography, Dartmouth, Nova Scotia19 December 200144°41′0.7″N 63°36′40.6″W
NRC1Institute for National Measurement Standards, National Research Centre, Ottawa, Ontario1 April 199545°27′15.0″N 75°37′25.8″W
PRDSDominion Observatory in Priddis, Alberta (near Calgary, Alberta)7 January 199750°52′16.8″N 114°17′36.5″W
SCH2Transport Canada radio telecommunication facility, Schefferville, Quebec29 June 199754°49′55.5″N 66°49′57.4″W
STJOGeological Survey of Canada (NRCan) geomagnetic observing station, St. John's, Newfoundland1 May 199247°35′42.8″N 52°40′39.9″W
WHITWhitehorse, Yukon1 June 199660°45′01.8″N 135°13′19.5″W
WINNNavCanada Winnipeg Area Control Centre building, Winnipeg, Manitoba9 January 199749°54′02.1″N 97°15′34.1″W
YELLYellowknife, Northwest Territories1 January 199162°28′51.2″N 114°28′50.4″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]

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References
  1. "Active Control Point Stations". Archived from the original on 2005-12-15. Retrieved 2006-11-27. (login needed)
  2. Gary Sawayama (April 1, 2011). "CDGPS Termination Announcement" (PDF) (Press release). Archived from the original (PDF) on February 4, 2012. Retrieved August 3, 2012.
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