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The dipole antenna of a radar altimeter of 1947. A radar altimeter (RA), also called a radio altimeter (RALT), electronic altimeter, reflection altimeter, or low-range radio altimeter (LRRA), measures altitude above the terrain presently beneath an aircraft or spacecraft by timing how long it takes a beam of radio waves to travel to ground, reflect, and return to the craft.
Radar echoes, showing a representation of the carrier. Pulse width also determines the radar's dead zone at close ranges. While the radar transmitter is active, the receiver input is blanked to avoid the amplifiers being swamped (saturated) or, (more likely), damaged.
Fixed search radar, stripped-down version of AN/CPS-6B: AN/FPS-12: Surveillance radar supporting Downrange Anti-missile Measurement Program : USAS American Mariner: AN/FPS-14: S-band medium-range low-altitude search Radar: Bendix Corporation: AN/FPS-16: Ground-based monopulse single object tracking radar (SOTR) NASA, US Air Force, US Army
A Voyage by Radar by R.C. Newhouse, Radio Development Engineer, published in the Bell Laboratories Record Vol. XXV No. 5 - May 1947, pages 181-189; The History of Radar – RC Newhouse of Bell Labs obtained a patent, and his experiments performed throughout the decade eventually led to the radio altimeter, which became operational in 1937.
Continuous-wave radar (CW radar) is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects. [1] Individual objects can be detected using the Doppler effect , which causes the received signal to have a different frequency from the transmitted signal ...
The greater the frequency shift the further the distance travelled. This method can achieve much better accuracy than the pulsed radar for the same outlay and radar altimeters that use frequency modulation are industry standard. The radar altimeter is used to measure height above ground level during landing in commercial and military aircraft ...
Pages in category "Earth satellite radar altimeters" The following 19 pages are in this category, out of 19 total. This list may not reflect recent changes. C.
An ATC ground station consists of two radar systems and their associated support components. The most prominent component is the PSR. It is also referred to as skin paint radar because it shows not synthetic or alpha-numeric target symbols, but bright (or colored) blips or areas on the radar screen produced by the RF energy reflections from the target's "skin."