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  2. Canadian weather radar network - Wikipedia

    en.wikipedia.org/wiki/Canadian_weather_radar_network

    The Canadian weather radar network consists of 33 weather radars spanning Canada's most populated regions. Their primary purpose is the early detection of precipitation, its motion and the threat it poses to life and property. Each had until 2018 a range of 256 km (159 mi) in radius around the site to detect reflectivity, 3 angles with a range ...

  3. Andover Earth Station - Wikipedia

    en.wikipedia.org/wiki/Andover_Earth_Station

    Aerial view of Andover Earth Station taken on 20 July 2022. Andover Earth Station was one of the first satellite earth stations, located at Andover in the US state of Maine. It was built by AT&T in 1961 to communicate with the Telstar 1 satellite, the first direct relay communications satellite. It provided the first experimental satellite ...

  4. Radar - Wikipedia

    en.wikipedia.org/wiki/Radar

    Radar is a system that uses radio waves to determine the distance ( ranging ), direction ( azimuth and elevation angles ), and radial velocity of objects relative to the site. It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.

  5. History of radio - Wikipedia

    en.wikipedia.org/wiki/History_of_radio

    History of radio. The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy".

  6. Sirius Satellite Radio - Wikipedia

    en.wikipedia.org/wiki/Sirius_Satellite_Radio

    Sirius Satellite Radio was a satellite radio ( SDARS) and online radio service operating in North America, owned by Sirius XM Holdings . Headquartered in New York City, with smaller studios in Los Angeles and Memphis, Sirius was officially launched on July 1, 2002. It now provides 69 streams (channels) of music and 65 streams of sports, news ...

  7. RISAT - Wikipedia

    en.wikipedia.org/wiki/RISAT

    RISAT 2BR1. RISAT-2BR1 is an Indian radar reconnaissance satellite that is part of India's RISAT programme and the fourth satellite in the series. It is built by Indian Space Research Organisation (ISRO). It was launched on 11 December 2019 at 3:25 PM IST on board PSLV rocket from Satish Dhawan Space Centre.

  8. Radiodetermination - Wikipedia

    en.wikipedia.org/wiki/Radiodetermination

    RAAF AN-FPS-117 radar in 2007. As defined by FS-1037C and ITU Radio Regulations, radiodetermination is: the determination of the position, velocity or other characteristics of an object, or the obtaining of information relating to these parameters, by means of the propagation properties of radio waves. There are two main fields to ...

  9. North Truro Air Force Station - Wikipedia

    en.wikipedia.org/wiki/North_Truro_Air_Force_Station

    North Truro Air Force Station. /  42.0314944°N 70.0532889°W  / 42.0314944; -70.0532889  ( North Truro AFS P-10) North Truro Air Force Station (AFS) is a closed United States Air Force General Surveillance Radar station. It is located 2.2 mi (3.5 km) east of North Truro, Massachusetts . Most of the site was inactivated by 1994 and ...

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