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  2. Radar horizon - Wikipedia

    en.wikipedia.org/wiki/Radar_horizon

    The radar horizon with an antenna height of 75 feet (23 m) over the ocean is 10-mile (16 km). However, since the pressure and water vapor content of the atmosphere varies with height, the path used by the radar beam is refracted by the change in density. With a standard atmosphere, electromagnetic waves are generally bent or refracted downward.

  3. Eglin AFB Site C-6 - Wikipedia

    en.wikipedia.org/wiki/Eglin_AFB_Site_C-6

    Eglin AFB Site C-6 is a United States Space Force radar station which houses the AN/FPS-85 phased array radar, associated computer processing system(s), and radar control equipment designed and constructed for the U.S. Air Force by the Bendix Communications Division, Bendix Corporation.

  4. Over-the-horizon radar - Wikipedia

    en.wikipedia.org/wiki/Over-the-horizon_radar

    The frequency of radio waves used by most radars, in the form of microwaves, propagate in straight lines.This generally limits the detection range of radar systems to objects on their horizon (generally referred to as "line of sight" since the aircraft must be at least theoretically visible to a person at the location and elevation of the radar transmitter) due to the curvature of the Earth.

  5. Plan position indicator - Wikipedia

    en.wikipedia.org/wiki/Plan_position_indicator

    A plan position indicator (PPI) is a type of radar display that represents the radar antenna in the center of the display, with the distance from it and height above ground drawn as concentric circles. As the radar antenna rotates, a radial trace on the PPI sweeps in unison with it about the center point. It is the most common type of radar ...

  6. File:Radar-hauteur-en.svg - Wikipedia

    en.wikipedia.org/wiki/File:Radar-hauteur-en.svg

    English: Height of a radar beam above Earth (AGL). Calculation of the height of radar echoes in the operating principles. Assuming the Earth is round, the radar beam in vacuum would raise according to the reverse curvature of the Earth. However, the atmosphere as an refractive index that diminish with height, due to the variation of its density.

  7. Semi-Automatic Ground Environment - Wikipedia

    en.wikipedia.org/wiki/Semi-Automatic_Ground...

    The environment allowed radar station personnel to monitor the radar data and systems' status (e.g., Arctic Tower radome pressure) and to use the range height equipment to process height requests from Direction Center (DC) personnel. DCs received the Long Range Radar Input from the sector's radar stations, and DC personnel monitored the radar ...

  8. Jindalee Operational Radar Network - Wikipedia

    en.wikipedia.org/wiki/Jindalee_Operational_Radar...

    The Jindalee Operational Radar Network (JORN) is an over-the-horizon radar (OHR) network operated by the Royal Australian Air Force (RAAF) that can monitor air and sea movements across 37,000 square kilometres (14,000 sq mi). [citation needed] It has a normal operating range of 1,000–3,000 kilometres (620–1,860 mi). [1]

  9. Predel-E - Wikipedia

    en.wikipedia.org/wiki/Predel-E

    Predel-E (in Russian: Предел-Э [1]) is a Russian military over-the-horizon radar system shown since 2017, [2] designed to detect ships in coastal areas. [3]It was developed by Concern Morinformsystem-Agat, with at least one variant designed by NPP Salyut. [3]