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  2. PAVE PAWS - Wikipedia

    en.wikipedia.org/wiki/PAVE_PAWS

    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 ...

  3. Solid State Phased Array Radar System - Wikipedia

    en.wikipedia.org/wiki/Solid_State_Phased_Array...

    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 ...

  4. Haystack Observatory - Wikipedia

    en.wikipedia.org/wiki/Haystack_Observatory

    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 ...

  5. Active electronically scanned array - Wikipedia

    en.wikipedia.org/wiki/Active_electronically...

    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.

  6. Andover Earth Station - Wikipedia

    en.wikipedia.org/wiki/Andover_Earth_Station

    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.

  7. Duga radar - Wikipedia

    en.wikipedia.org/wiki/Duga_radar

    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 ...

  8. Goldstone Deep Space Communications Complex - Wikipedia

    en.wikipedia.org/wiki/Goldstone_Deep_Space...

    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 ...

  9. 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.

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