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PAVE PAWS transmitter building, Clear Space Force Station, Alaska, showing the two circular phased array antennas Some of the 2,677 crossed-dipole elements in the phased array antenna. The radar was built in the Cold War to give early warning of a nuclear attack, to allow time for US bombers to get off the ground and land-based US missiles to ...
The Solid State Phased Array Radar System is a phased array radar with 2500 "solid state transmitter" modules. [6] It began replacing PAVE PAWS when the first AN/FPS-115 face was taken off-line for the radar upgrade. New AN/FPS-123 Early Warning Radars became operational in (Beale) and (Cape Cod) in each base's existing PAVE PAWS "Scanner ...
Haystack radio telescope at the MIT Haystack Observatory, Westford, MA Westford Radio Telescope Millstone Hill Radar. The 37 m (121 ft) Haystack Radio Telescope is a parabolic antenna protected by a 46 m (151 ft) metal-frame radome. It is known as the Haystack Long-Range Imaging Radar (LRIR) or Haystack Ultrawideband Satellite Imaging Radar ...
The Eurofighter Typhoon combat aircraft with its nose fairing removed, revealing its Euroradar CAPTOR AESA radar antenna. An active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled antenna array in which the beam of radio waves can be electronically steered to point in different directions without moving the antenna.
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 telephone and television service between North America and Europe.
However, because of its distinctive transmission pattern, many experts and amateur radio hobbyists realized it was an over-the-horizon radar system. NATO military intelligence had already given it the reporting name STEEL WORK or STEEL YARD , based on the massive size of the antenna, which spanned 700 metres (2,300 ft) in length and 150 metres ...
The radio frequencies used for spacecraft communication are in the microwave part of the radio spectrum; S band (2.29–2.30 GHz), X band (8.40–8.50 GHz) and Ka band (31.8–32.3 GHz). In addition to receiving radio signals from the spacecraft ( downlink signals), the antennas also transmit commands to the spacecraft ( uplink signals) with ...
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.
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