Sentences with phrase «radar satellite data»

In an area of some nine square kilometres for which radar satellite data is available, they collected laser scanning data from more than 40 plots, and integrated this data into a model for calculating the biomass.

Not exact matches

Prime Minister Najib Razak acknowledged Saturday that military radar and satellite data raised the possibility that the plane could have ended up somewhere in Indonesia, the southern Indian Ocean or along a vast arc of territory from northern Laos across western China to Central Asia.

«The laser scanning data collected from selected points does give significantly more precise results than the satellite radar,» notes Christian Berger, co-author of the study and head of the research project on which Victor Odipo's doctoral thesis is based.

If visual data from satellites is combined with information from radar and LiDAR, (light detecting and ranging, which provides laser - measured data about 3 - D contours), Xiao explains, researchers can really hone prediction of some diseases down to a tree line.

To get the biggest picture now available, Paolo and his colleagues stitched together satellite radar altimetry data from three consecutive and overlapping missions: the European Space Agency's (ESA's) ERS - 1 and ERS - 2 (which flew from 1991 to 2000 and 1995 to 2011, respectively), and ESA's ENVISAT mission, which collected data from 2002 to 2012.

«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.

In the real world, volcanoes are much more messy and complicated, and the method would need to employ genuine GPS and satellite radar data.

While satellites have provided consistently good data for years, the next frontier in sea level rise measurement is a new type of radar that can capture a more crisp, higher - resolution picture of sea surface heights.

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.

Radar satellites can detect the surface ripples produced by internal waves and the data collected allow researchers to calculate the speed of internal waves traveling below the surface.

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.

When combined with radar and other satellite data, GLM data may help forecasters anticipate severe weather and issue flood and flash flood warnings sooner.

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

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.

EWeLiNE combines these data with other atmospheric observations — from ground - based weather stations, radar and satellites — and sophisticated computer models predict power generation over the next 48 hours or so.

Forecasters rely on satellites for these situations and also rely on them to provide broader data that supplement the localized information from a given radar.

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

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.

Published in their final form last week in the journal Geophysical Research Letters, the maps draw on a variety of data sources, including satellite radar and aerial imagery, as well as special sonar data collected on ship expeditions to the front of the ice sheet.

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.

Data comes from various sources, including observations, weather stations at airports, Doppler radar and satellite imagery, National Weather Service bulletins, and even tidal gages.

Based on field observations, seismic shaking data, GPS measurements, and radar imagery from satellites, Hamling and his colleagues found that surface ruptures in the New Zealand quake were widely separated — in one case by more than 15 kilometers.

«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.

· Raphaël Grandin and colleagues at the Institut de Physique du Globe de Paris combined satellite radar data (InSAR) and broadband seismic data to determine that the main Pawnee seismic rupture occurred between 4 and 9 kilometers depth, well below the main sediment layer where wastewater is injected.

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

Interestingly, the NCDC has 120,000 boxes of paper obs forms (truly), satellite photos, radar data, fiche and so on, all in the process of being digitized.

Indeed, satellite gravity data and radar altimetry reveal that the Totten Glacier of East Antarctica, which fronts a large ice mass grounded below sea level, is now losing mass [90].

Forecasts, wind models, satellite and radar images, tide and current conditions and even data streamed from weather buoys are all available through links to various web services.

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.

Rainfall rates derived from satellite data have a long legacy in operational weather forecasting because their information complements ground observations such as weather radar and rain gauges.

Based in InSAR measurements acquired between 2007 and 2009 the mosaic was compiled from 900 satellite tracks and more than 3,000 radar data orbits.

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 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.

It costs little to field the observations — the satellites and the radars, the surface in situinstruments, etc. to monitor conditions and their changes; to assimilate the data into variety of numerical models, to run these and form ensemble averages; to disseminate the findings.

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.

The researchers compared the GNSS - R satellite measurements with data from other sources, including tropical cyclone best track data from the National Oceanic and Atmospheric Administration's National Centers for Environmental Information; two climate reanalysis products; and a spaceborne scatterometer, a tool that uses microwave radar to measure winds near the surface of the ocean.

«In addition to satellite and airborne data collection and analysis, NASA scientists participate in field work to collect ice cores and other related data, such as ground penetrating radar,» Casey said.

These missions - satellite radar altimetry projects overseen by the European Space Agency (ESA)- lasted from 1994 to 2012, providing the researchers plenty of data that could even be overlapped and compared to ensure an accurate assessment of ice shelf thickness for more than a decade.

To arrive at their conclusions they had to combine the satellite and radar data, and estimates of snowfall and ice melt, to build up a «mass conservation algorithm» that could reveal the secrets of the buried bedrock.

They used airborne radar soundings and satellite data to show that beneath the glacial ice were valleys so deeply incised that some of them were hundreds of metres below sea level, at distances tens of kilometres from the sea.

Son Nghiem of NASA's Jet Propulsion Laboratory was analyzing radar data from the ISRO Oceansat - 2 satellite last week when he noticed that most of Greenland appeared to have undergone surface melting on July 12.

Scientists use satellite radar data to analyse changes and movements of sea ice.

The Postdoc will be responsible for preparing long - term lidar and radar measurements for use with a newly developed ground - based lidar - radar simulator for ModelE3, running ModelE3 baseline and sensitivity test simulations, preparing comparisons of aerosol and meteorological conditions with existing reanalysis and satellite data sets, and contributing to model improvement efforts that will be guided by project results.

The aquifer was discovered by analyzing data from a layering satellite, radar, and geological maps in partnership with Unesco.

Larour, E., Rignot, E., Joughin, I. & Aubry, D.,» Rheology of the Ronne Ice Shelf, Antarctica, inferred from satellite radar interferometry data using an inverse control method», Geophysical Research Letters, 32, 2005.