A radar altimeter (RA), also called a radio altimeter (RALT), electronic altimeter, reflection altimeter, or low-range radio altimeter (LRRA), measures...
22 KB (2,875 words) - 03:35, 13 August 2024
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...
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Satellite geodesy (redirect from Satellite radar altimeter)
position of an Earth satellite, allowing for the precise calibration of radar altimeters and separation of long-term instrumentation drift from secular changes...
21 KB (2,340 words) - 17:44, 23 August 2024
Space-based radar or spaceborne radar is a radar operating in outer space; orbiting radar is a radar in orbit and Earth orbiting radar is a radar in geocentric...
10 KB (1,334 words) - 06:50, 28 July 2024
Venera 4 (section Radar altimeter)
measured using a radar altimeter operating at 770 MHz. The altimeter had an integer ambiguity of 30 kilometres (19 mi): that is, the same radar signal would...
17 KB (1,939 words) - 04:02, 12 June 2024
that is compared with measurements made during flight by an on-board radar altimeter. A TERCOM system considerably increases the accuracy of a missile compared...
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space-based radar altimeters Poseidon-1, a CNES-built Ku-band radar altimeter aboard TOPEX/Poseidon oceanographic satellite Poseidon-2, a radar altimeter on board...
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satellite altimeter data from NASA's Geodetic Earth Orbiting program, to create models of the Earth's shape. She became project manager for the Seasat radar altimetry...
23 KB (2,110 words) - 16:50, 29 August 2024
Radar altimeter antennas are clearly embossed with the words, "do not paint", a warning that was not heeded. Bench testing of the radar altimeter proved...
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a target can still be seen. CW radar systems are used at both ends of the range spectrum. Inexpensive radio-altimeters, proximity sensors and sports accessories...
26 KB (3,814 words) - 20:40, 30 July 2024
too early. Two or more redundant radar altimeters were used to reliably detect final altitude. When the altimeters sensed the correct height, the firing...
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Operation IceBridge (section Laser altimeters)
for estimating sea ice thickness. Ku-band Radar Altimeter - IceBridge also carries a Ku band radar altimeter, which can penetrate snow layers to measure...
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265A radar altimeter with Type 271 radar altimeter, fully digitized fly-by-wire flight control system, and in addition, Type 232H airborne radar is replaced...
26 KB (2,538 words) - 19:19, 9 September 2024
guidance, radar altimeter, air traffic management, early-warning radar, fire-control radar, forward warning collision sensing, ground penetrating radar, surveillance...
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European Remote-Sensing Satellite (category Earth satellite radar altimeters)
measurement principles. These included: RA (Radar Altimeter) is a single frequency nadir-pointing radar altimeter operating in the Ku band. ATSR-1 (Along-Track...
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(typically under poor visibility conditions) must rely on the aircraft's altimeter to decide when to deploy the undercarriage and prepare for landing. Therefore...
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TOPEX/Poseidon (category Earth satellite radar altimeters)
the pioneering but short-lived Seasat satellite. TOPEX/Poseidon's radar altimeter provided the first continuous global coverage of the surface topography...
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deploy in time. A new version was ordered for the Gulf War that added a radar altimeter allowing release from medium altitudes and then opening at the proper...
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was known as a ground proximity warning system (GPWS), which used a radar altimeter to assist in calculating terrain closure rates. That system was further...
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Mikoyan-Gurevich MiG-25 (redirect from Smerch (radar))
detection range (depending on how good the tuning of the radar). A RV-UM or a RV-4 radar altimeter SPO-10M Sirena-3 RWR (SPO-15L Beryoza for MiG-25PDSG)...
78 KB (9,707 words) - 18:42, 7 September 2024
Seasat (category Earth satellite radar altimeters)
instruments designed to return the maximum information from ocean surfaces: Radar altimeter to measure spacecraft height above the ocean surface Microwave scatterometer...
11 KB (815 words) - 20:32, 6 June 2024
such as the British Yellow Sun and Red Beard, used RATs to power radar altimeters and firing circuits; these were a more reliable alternative to batteries...
12 KB (1,344 words) - 03:18, 5 September 2024
Bullpup missile, was fitted with an inertial guidance system, and had a radar altimeter-based fuse to ensure an airburst of the weapon's bomblet payload. It...
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comes from the pilot's altimeter, and is transmitted using a modified Gray code, called a Gillham code. Where the pilot's altimeter does not contain a suitable...
12 KB (1,315 words) - 20:19, 17 October 2023
withdrawn from all Bomber Command aircraft. An AN/APS-13 was used as a radar altimeter during the Atomic bombings of Hiroshima and Nagasaki by the 509th Composite...
4 KB (322 words) - 16:53, 26 August 2024
Sentinel-3 (category Earth satellite radar altimeters)
sensor in space able to detect cyanobacteria. SRAL (Synthetic Aperture Radar Altimeter) is the main topographic instrument to provide accurate topography...
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Low-altitude parachute-extraction system Radar altimeter Radar horizon Sea skimming (missiles) Terrain-following radar Wire strike protection system Helicopters...
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anti-shipping missile with an IR seeker instead of the commonly used active radar seeker. Both hardware and software have been updated since entering series...
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controlled by pitch (or the control column), and not by the A/T. A radar altimeter feeds data to the autothrottle in this mode. On Boeing-type aircraft...
5 KB (648 words) - 20:42, 15 June 2024