Sentences with phrase «using radar satellite»

A hidden riverbed has been spotted under the sand of the vast Sahara desert using radar satellite imagery.

Not exact matches

Brussels wants to take the operation step - by - step, starting by collecting intelligence on the traffickers by using radar, satellite pictures and reconnaissance flights and raiding unflagged boats.

The European Space Agency's Mars Express satellite has used ground - penetrating radar in some areas to look for a water table but found no evidence for one, despite research that concluded any water would be found within 9 kilometres of the surface — well within the reach of the probe's instruments.

Using satellite radar and helicopter observations, scientists at Laval University in Quebec and the University of Alaska at Fairbanks discovered that the more - than -150-square-mile Ward Hunt Ice Shelf on the north coast of Canada's Nunavut territory has split in half.

In the United Kingdom, Seymour Laxon of University College London used satellite radar to study roughly half the permanent ice cover in the Arctic and found that it has thinned by 12 inches over the last eight years.

The researchers used radar signals bounced off the ground by satellites that measure how long the pulses take to return to space.

(The U.S. Air Force uses powerful radars to catalog and track most space debris to provide early warnings for astronauts and satellites, but Sprites are so small that they can slip through that surveillance unseen.)

Moreover, the partnership with China will likely continue, and the two nations are considering the development of a new family of satellites using radar instead of optical instruments, enabling the observation of forests even through clouds.

«These scientists combined citizen science observations with data from radar, satellites and weather predictions to understand the cues birds use in their migrations across continents,» said Liz Blood, program director in the National Science Foundation's Division of Environmental Biology, which funded the research through NSF's MacroSystems Biology Program.

The team monitored the earlier development of the rift using a technique called satellite radar interferometry (SRI) applied to ESA Sentinel - 1 images.

Shirzaei and colleagues took a different approach, using a constellation of satellites — the Interferometric Synthetic Aperture Radar (InSAR) satellites — to detect alterations in Earth's crust driven by underlying pressure fluctuations.

The InSAR satellites use radar to illuminate large areas of the Earth's surface, measuring how the distance between the satellite structure and the ground surface changes over time.

A research team led by Romeiser was the first to accurately measure currents from a space shuttle platform between islands off the Dutch coast and the first to make current measurements using the radar on the TerraSAR - X satellite.

To track ocean storms and dangerous waves, the Navy uses radar data from satellites that estimate wind speed and wave height.

The team used radar data from satellites, such as the European Space Agency's now - defunct Envisat, to study ground motions in the Taupo Volcanic Zone.

Using satellite radar data, Tim Wright, a geophysicist at the University of Leeds in England, has pieced together exactly how the gap got started.

Using data from Global Positioning System (GPS) stations and Interferometric Synthetic Aperture Radar (InSAR) images collected during successive satellite fly - overs, ASU researchers were able to measure changes in surface elevation during a time period spanning the main Gorkha event, and several major aftershocks, with centimeter accuracy.

Co-author Fielding used satellite radar imagery to create a map of the terrain that dropped during the earthquake and where land surface had risen.

Radar satellites supply the data used to map sea level and ocean currents.

For instance, ESA has an agreement to use imaging radar from two Canadian satellites, but that will produce far less data than Envisat.

The Biomass radar will still have to be turned off when it is over North America and Europe because it will interfere with systems used by the military to track objects in space, but forests there are relatively well studied; it's the swathes of forest in the tropics, Siberia, and China that will be the new satellite's main concern.

Over the past two decades my company has used imaging radar satellites to map oil on the sea surface for 70 million square kilometres of ocean.

Other research measures announced by Flaherty included $ 72.75 million for a forestry and environmental genomics competition at Genome Canada; $ 63.78 million over 5 years for the Canadian Space Agency's plan to develop the RADARSAT Constellation Mission, which proposes to generate radar images using multiple satellites; and $ 17.46 million over 5 years «to commence the pre-construction design phase» for the proposed Canadian Arctic Research Initiative.

InSAR uses a highly accurate radar to measure the change in distance between the satellite and ground surface, allowing the team to show that injecting water into the wells at high pressure caused ground uplift near the shallower wells, the release said.

The UC Berkeley team used 19 years of satellite data to map ground deformation using interferometric synthetic aperture radar (InSAR) and measure creep along the southern end of the Hayward Fault, and found, surprisingly, that the creep didn't stop south of Fremont, the presumed southern end of the fault, but continued as far as the Calaveras Fault.

But Avouac, Ampuero, and their colleagues used satellite Synthetic Aperture Radar data and a technique called back projection that takes advantage of the dense arrays of seismic stations in the United States, Europe, and Australia to track the progression of the earthquake, and found that it was quite contained at depth.

Using data from the GPS stations, an accelerometer that measures ground motion in Kathmandu, data from seismological stations around the world, and radar images collected by orbiting satellites, an international team of scientists led by Caltech has pieced together the first complete account of what physically happened during the Gorkha earthquake — a picture that explains how the large earthquake wound up leaving the majority of low - story buildings unscathed while devastating some treasured taller structures.

Radar, satellite and some military systems use this area of the spectrum currently but it's definitely less occupied than the spectrum currently in use.

Higgins and her colleagues used satellite - radar images to measure subsidence near the Yellow River delta.

«We're the first to have developed a strategy using data assimilation to successfully forecast the evolution of magma overpressures beneath a volcano using combined ground deformation datasets measured by Global Navigation Satellite System (more commonly known as GPS) and satellite radar data,» explains Mary Grace Bato, lead author of the study and a researcher at the Institut des Sciences de la Terre (ISTerre) in France.

Finnish Meteorological Institute makes observations of the atmosphere, sea and space at over 400 stations around Finland, and using remote sensing instruments such as radars and satellites.

PNNL researchers use a host of cutting - edge tools — including weather radars, research aircraft, computer models and satellite measurements — to explore these complex interactions.

Detailed elevation map of ice stream C using satellite imagery and airborne radar, Annals of Glaciology, Vol.

Horinouchi, T., 2002: Mesoscale variability of tropical precipitation: Validation of satellite estimates of wave forcing using TOGA COARE radar data.

Several geographical transformations are now associated with technological advancements which make use of instruments such as satellites, radars, and others.

During the 1970s, a long - range tracking system for radars that Mr. Stodola invented was used in NASA's Project Mercury, the first - U.S. - man - in - space program, and for the first air force surveillance satellite, Discoverer.

They used 15 years of satellite radar data from the European Earth Remote Sensing - 1 and -2, Canada's Radarsat - 1 and Japan's Advanced Land Observing satellites to reveal the pattern of ice sheet motion toward the sea.

Using satellite radar interferometry observations of Greenland, we detected widespread glacier acceleration below 66 - north between 1996 and 2000, which rapidly expanded to 70 - north in 2005.

According to one of the studies, published in the journal Geophysical Research Letters, which used radar measurements from the European Space Agency's Sentinel - 1 satellite, Smith Glacier's «grounding line» — the boundary between the bedrock and the ocean — has been retreating at a rate of 1.24 miles per year since 1996.

Here, satellite radar observations are used to produce a composite picture of the life cycle of convection in these two regions.

A study using Earth Remote Sensing satellite radar interferometry (EERS - 1 and -2) observations from 1992 through 2011 finds «a continuous and rapid retreat of the grounding lines of Pine Island, Thwaites, Haynes, Smith, and Kohler» Glaciers, and the authors conclude that «this sector of West Antarctica is undergoing a marine ice sheet instability that will significantly contribute to sea level rise in decades to centuries to come» (Rignot et al. 2014).

Advances in glacier ice flow mapping using repeat satellite images, and later using interferometric synthetic aperture radar SAR methods, facilitated the mass budget approach, although this still requires an estimate of snow input and a cross-section of the glacier as it flows out from the continent and becomes floating ice.

Satellite radar altimetry, in which timing of a radar or laser beam return back to a satellite is used as a measure of surface elevation, enabled researchers to assess ice mass by examining elevation change over time.

Scientists from the University of Erlangen - Nuremberg Institute of Geography and from the Laboratoire de Glaciologie et Gophysique de l'Environnement in Grenoble, France, used radar data from satellites such as ESA's Envisat and observations of ice thickness from airborne surveys in a complex model to demonstrate, for the first time, how the buttressing role of the ice shelves is being compromised as the shelves decline.

The opaqueness of seawater to the passage of light or radio waves makes it difficult to efficiently study the seafloor or the deep interior of the oceans with either optical methods (cameras, etc), or with radar or microwave radiation (such as used in satellites).

The team then extrapolated these data over the varying landscape to produce a seamless map, using NASA imagery from the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Terra spacecraft, the QuikScat scatterometer satellite and the Shuttle Radar Topography Mission.

Two hours before Hurricane Isaac made landfall, a satellite orbiting hundreds of miles above the storm used a radar instrument to map the storm's inner structure.

Using airborne radar and satellite imaging, researchers have located more than 400 of these so - called subglacial lakes beneath the Antarctic ice sheet over the past 50 years.

A side note: NASA and NOAA are only two of four major government agencies worldwide keeping track of global temperature trends, using both satellites and a network of ground - based thermometers, buoys, radar, and other tools.

Researchers used data from IceBridge's ice - penetrating radar — the Multichannel Coherent Radar Depth Sounder, or MCoRDS, which is operated by the Center for Remote Sensing of Ice Sheets at the University of Kansas, Lawrence, Kan. — to determine ice thickness and sub-glacial terrain, and images from satellite sources such as Landsat and Terra to calculate veloradar — the Multichannel Coherent Radar Depth Sounder, or MCoRDS, which is operated by the Center for Remote Sensing of Ice Sheets at the University of Kansas, Lawrence, Kan. — to determine ice thickness and sub-glacial terrain, and images from satellite sources such as Landsat and Terra to calculate veloRadar Depth Sounder, or MCoRDS, which is operated by the Center for Remote Sensing of Ice Sheets at the University of Kansas, Lawrence, Kan. — to determine ice thickness and sub-glacial terrain, and images from satellite sources such as Landsat and Terra to calculate velocity.