A radar altimeter (RA), also called a radio altimeter (RALT), electronic altimeter, reflection altimeter, or low-range radio altimeter (LRRA), measures...

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...

position of an Earth satellite, allowing for the precise calibration of radar altimeters and separation of long-term instrumentation drift from secular changes...

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...

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...

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...

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...

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...

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...

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...

too early. Two or more redundant radar altimeters were used to reliably detect final altitude. When the altimeters sensed the correct height, the firing...

for estimating sea ice thickness. Ku-band Radar Altimeter - IceBridge also carries a Ku band radar altimeter, which can penetrate snow layers to measure...

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...

guidance, radar altimeter, air traffic management, early-warning radar, fire-control radar, forward warning collision sensing, ground penetrating radar, surveillance...

systems such as ground-proximity warning systems (GPWS), which use radar altimeters as a key element. One of the major weaknesses of GPWS is the lack of...

measurement principles. These included: RA (Radar Altimeter) is a single frequency nadir-pointing radar altimeter operating in the Ku band. ATSR-1 (Along-Track...

(typically under poor visibility conditions) must rely on the aircraft's altimeter to decide when to deploy the undercarriage and prepare for landing. Therefore...

the pioneering but short-lived Seasat satellite. TOPEX/Poseidon's radar altimeter provided the first continuous global coverage of the surface topography...

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...

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...

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)...

instruments designed to return the maximum information from ocean surfaces: Radar altimeter to measure spacecraft height above the ocean surface Microwave scatterometer...

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...

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...

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...

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...

sensor in space able to detect cyanobacteria. SRAL (Synthetic Aperture Radar Altimeter) is the main topographic instrument to provide accurate topography...

Low-altitude parachute-extraction system Radar altimeter Radar horizon Sea skimming (missiles) Terrain-following radar Wire strike protection system Helicopters...

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...

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...