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GPS·C
GPS·C (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 Canada-Wide DGPS Correction Service (CDGPS). 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wide Area Augmentation System
The Wide Area Augmentation System (WAAS) is an air navigation aid developed by the Federal Aviation Administration to augment the Global Positioning System (GPS), with the goal of improving its accuracy, integrity, and availability. Essentially, WAAS is intended to enable aircraft to rely on GPS for all phases of flight, including approaches with vertical guidance to any airport within its coverage area. It may be further enhanced with the local-area augmentation system (LAAS) also known by the preferred ICAO term ''ground-based augmentation system'' (GBAS) in critical areas. WAAS uses a network of ground-based reference stations, in North America and Hawaii, to measure small variations in the GPS satellites' signals in the western hemisphere. Measurements from the reference stations are routed to master stations, which queue the received deviation correction (DC) and send the correction messages to geostationary WAAS satellites in a timely manner (every 5 seconds or better) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Differential GPS
Differential Global Positioning Systems (DGPSs) supplement and enhance the positional data available from global navigation satellite systems (GNSSs). A DGPS can increase accuracy of positional data by about a thousandfold, from approximately to . DGPSs consist of networks of fixed position, ground-based reference stations. Each reference station calculates the difference between its highly accurate known position and its less accurate satellite-derived position. The stations broadcast this data locally—typically using ground-based transmitters of shorter range. Non-fixed (mobile) receivers use it to correct their position by the same amount, thereby improving their accuracy. The United States Coast Guard (USCG) previously ran DGPS in the United States on longwave radio frequencies between and near major waterways and harbors. It was discontinued in March 2022. The USCG's DGPS was known as NDGPS (Nationwide DGPS) and was jointly administered by the Coast Guard and the United ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fredericton, New Brunswick
Fredericton (; ) is the capital city of the Provinces and territories of Canada, Canadian province of New Brunswick. The city is situated in the west-central portion of the province along the Saint John River (Bay of Fundy), Saint John River, also known by its Indigenous peoples in Canada, Indigenous name of Wolastoq, which flows west to east as it bisects the city. The river is the dominant natural feature of the area. One of the main urban centres in New Brunswick, As of the 2024 Statistics Canada estimates, the city had a population of 72,700, with the metropolitan population in 2024 estimated at 122,500 .It is the third-largest city in the province after Moncton and Saint John, New Brunswick, Saint John. On 1 January 2023, Fredericton annexed parts of five Local service district (New Brunswick), local service districts; [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Positioning System
The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta 31. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephone or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls, and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. Overview The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was launched in 1978 an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yellowknife, Northwest Territories
Yellowknife is the capital, largest community, and the only city in the Northwest Territories, Canada. It is on the northern shore of Great Slave Lake, about south of the Arctic Circle, on the west side of Yellowknife Bay near the outlet of the Yellowknife River. Yellowknife and its surrounding water bodies were named after a local Dene tribe, who were known as the "Copper Indians" or "Yellowknife Indians", today incorporated as the Yellowknives Dene First Nation. They traded tools made from copper deposits near the Arctic Coast. Modern Yellowknives members can be found in city and in the adjoining, primarily Indigenous communities of Ndilǫ and Dettah. The city's population was 20,340 per the 2021 Canadian census. Of the eleven official languages of the Northwest Territories, five are spoken in significant numbers in Yellowknife: Dene Suline, Dogrib, South and North Slavey, English, and French. In the Dogrib language, the city is known as ''Sǫǫ̀mbak’è'' (, "where ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winnipeg, Manitoba
Winnipeg () is the capital and largest city of the Provinces and territories of Canada, Canadian province of Manitoba. It is centred on the confluence of the Red River of the North, Red and Assiniboine River, Assiniboine rivers. , Winnipeg had a city population of 749,607 and a metropolitan population of 834,678, making it Canada's List of the largest municipalities in Canada by population, sixth-largest city and List of census metropolitan areas and agglomerations in Canada, eighth-largest metropolitan area. The city is named after the nearby Lake Winnipeg; the name comes from the Cree language, Western Cree words for 'muddy water' – . The region was a trading centre for Indigenous peoples in Canada, Indigenous peoples long before the European colonization of the Americas, arrival of Europeans; it is the traditional territory of the Anishinaabe (Ojibway), Ininew (Cree), Oji-Cree, Dene, and Dakota people, Dakota, and is the birthplace of the Métis people in Canada, Métis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitehorse, Yukon
Whitehorse () is the capital of Yukon, and the largest city in Northern Canada. It was incorporated in 1950 and is located at kilometre 1426 (Historic Mile 918) on the Alaska Highway in southern Yukon. Whitehorse's Downtown Whitehorse, downtown and Riverdale, Yukon, Riverdale areas occupy both shores of the Yukon River, which rises in British Columbia and meets the Bering Sea in Alaska. The city was named after the White Horse Rapids for their resemblance to the mane of a white horse, near Miles Canyon Basalts, Miles Canyon, before the river was dammed. Because of the city's location in the Whitehorse valley and relative proximity to the Pacific Ocean, the climate tends to be milder. At this latitude, winter days are short and summer days have up to about 19 hours of daylight. Whitehorse, as reported by ''Guinness World Records'', is the city with the List of least-polluted cities by particulate matter concentration, least air pollution in the world. As of the 2021 Canadian censu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schefferville, Quebec
Schefferville () is a town in the Provinces and territories of Canada, Canadian province of Quebec. Schefferville is in the heart of the Naskapi and Innu territory in northern Quebec, less than 2 km (1¼ miles) from the border with Labrador on the north shore of Knob Lake. It is located within the Caniapiscau Regional County Municipality and has an area of . Schefferville completely surrounds the autonomous Innu community of Matimekosh, and it abuts the small community of Lac-John Reserve. Both of the latter communities are First Nations Innu reserves. Schefferville is also close to the Naskapi reserved land of Kawawachikamach (Naskapi reserved land), Kawawachikamach. The isolated town is not connected to the provincial road network but is accessible by airplane via the Schefferville Airport or by train. Schefferville is the northern terminus of Tshiuetin Rail Transportation (formerly operated by the Quebec North Shore and Labrador Railway) with service to Sept-Îles, Quebec, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calgary, Alberta
Calgary () is a major city in the Provinces and territories of Canada, Canadian province of Alberta. As of 2021, the city proper had a population of 1,306,784 and a Metropolitan area, metropolitan population of 1,481,806 making it the List of the largest municipalities in Canada by population, third-largest city and List of census metropolitan areas and agglomerations in Canada, fifth-largest metropolitan area in Canada. Calgary is at the confluence of the Bow River and the Elbow River in the southwest of the province, in the transitional area between the Rocky Mountain Foothills and the Canadian Prairies, about east of the front ranges of the Canadian Rockies, roughly south of the provincial capital of Edmonton and approximately north of the Canada–United States border. The city anchors the south end of the Statistics Canada-defined urban area, the Calgary–Edmonton Corridor. Calgary's economy includes activity in many sectors: energy; financial services; film and tele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Priddis, Alberta
Priddis is a hamlet in Alberta, Canada within Foothills County. It is located in the foothills of the Canadian Rockies at an elevation of . The hamlet is located southwest of the intersection of the Cowboy Trail (Highway 22) and Highway 22X, approximately west of Calgary's city limits. The hamlet is located in Census Division No. 6 and in the federal riding of Macleod. It was named for Charles Priddis, who homesteaded along the Fish Creek in 1886.Aphrodite Karamitsanis. Place Names of Alberta Volume 2: Southern Alberta Demographics The population of Priddis according to the 2003 municipal census conducted by Foothills County is 79. See also *List of communities in Alberta The province of Alberta, Canada, is divided into ten types of Local government in Canada, local governments – urban municipalities (including List of cities in Alberta, cities, List of towns in Alberta, towns, List of villages in Alberta, vil ... *List of hamlets in Alberta References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
