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.
Station nameLocationOperational DateCoordinates
ALBHCanadian Forces Base, Esquimalt, British Columbia
ALGOAlgonquin Space Complex, Algonquin Provincial Park, Ontario
CHURGeological Survey of Canada regional seismic station, Churchill, Manitoba
DRAODominion Radio Astrophysical Observatory, Penticton, British Columbia
EUR2New Environment Canada Weather Station building, Eureka, Nunavut
FRDNHugh John Fleming Forestry Complex, near the University of New Brunswick in Fredericton, New Brunswick
HLFXBedford Institute of Oceanography, Dartmouth, Nova Scotia
NRC1Institute for National Measurement Standards, National Research Centre, Ottawa, Ontario
PRDSDominion Observatory in Priddis, Alberta
SCH2Transport Canada radio telecommunication facility, Schefferville, Quebec
STJOGeological Survey of Canada geomagnetic observing station, St. John's, Newfoundland
WHITWhitehorse, Yukon
WINNNavCanada Winnipeg Area Control Centre building, Winnipeg, Manitoba
YELLYellowknife, Northwest Territories

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.