Sentences with phrase «radar altimeter»
A radar altimeter is a device that uses radar technology to measure the distance between an aircraft and the ground. Full definition
Using Envisat radar altimeter data, scientists from the Centre for Polar Observation and Modelling at University College London (UCL) measured sea ice thickness over the Arctic from 2002 to 2008 and found that it had been fairly constant until the record loss of ice in the summer of 2007.
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In particular, we aim for a detection of MYI floes in a area composed mostly first - year ice from synthetic aperture radar (SAR), heavily ridged ice regions from SAR, the thickest ice from radar altimeter (RA) thickness profiles, regional anomalies of thick or thin ice via passive microwave (PMW) data, sea ice areas vulnerable for the wave action, detection of early / late melting season and improving capabilities to forecast seasonal sea ice extremes.
In the early 1990s the TOPEX (Topography Experiment for Ocean Circulation) / Poseidon satellite, a joint American - French mission, shot into orbit armed with radar altimeters to measure the height of the sea surface.
Coastal altimetry, which provides detailed wave and sea level data in the coastal zone captured by specialist instruments called radar altimeters on board satellites, is at the heart of the project and scientists from NOC have been at the cutting - edge of this technique.
Operations Manager Andrea Accomazzo confirmed that the lander's radar altimeter did switch on and that its retro rockets fired up to slow its descent, «but only for a few seconds, shorter than expected,» he said.
Its main sensor is a sophisticated radar altimeter designed to measure the distance between the satellite and Earth's surface with such high precision that it will estimate ice thickness with an accuracy of a few centimeters.
Sea level has been rising about 3 millimeters per year, on average, since 1993, according to data gathered by space - based radar altimeters.
The slope in sea level across the Gulf Stream has been measured by satellite radar altimeter to be one metre over a horizontal distance of 100 km (62 miles), which is sufficient to cause a surface geostrophic current of one metre per second at 43 ° N.
The contention that there is a meaningful change that radar altimeters suddenly discovered is nonsense.
Radar altimeters work by bouncing radio waves off the terrain below and measuring how long they take to return to the spacecraft.
Papa, F., C. Prigent, W.B. Rossow, B. Legresy, and F. Remy, 2006: Inundated wetland dynamics over boreal regions from remote sensing: The use of Topex - Poseidon dual - frequency radar altimeter observations.
However, the new satellite and radar altimeter data lacked the resolution to accurately measure sea levels down to the mm level.
Advance methods to produce freeboard and sea ice thickness profiles from radar altimeter (RA) data.
Future work will extend the methods used in this study to all other channels Cassini's radar altimeter has observed on Titan.
The TGO will also carry a lander, Schiaparelli, which will test out key technologies such as a parachute and a radar altimeter.
Tests in the Pacific Ocean showed that the instrument, a radar altimeter called AltiKa, can spot seamounts as small as 1 kilometer tall.
ESA's CryoSat satellite, which carries a radar altimeter, has recently shown that since 2009 the rate at which ice is been lost from the West Antarctic Ice Sheet every year has increased by a factor of three.
CryoSat - 2 carries a radar altimeter optimized to measure the extent and thickness of polar ice.
Nine thrusters will kick in for this last kilometer, guided by a radar altimeter.
Launched in 2010, CryoSat carries a radar altimeter that can «see» through clouds and in the dark, providing continuous measurements over areas like Antarctica that are prone to bad weather and long periods of darkness.
Stenoien, M, D., and C. R. Bentley, Topography estimation in West Antarctica directly from level - 2 radar altimeter data, T. - D.
Did you somehow acquire a radar altimeter for a currently produced nuclear bomb?
The two satellites are in a polar orbit with an inclination of about 82 degrees and operates 3 distinct instruments: a radar altimeter; an imaging spectrometer; and an infrared radiometer.
This is the first map of its kind generated using data from a radar altimeter and at such a high resolution compared to previous satellite measurements.
The 3D image is constructed from around 250 million measurements taken by CryoSat's radar altimeter.
Did you somehow acquire a radar altimeter for a currently produced nuclear bomb?