Results 51 to 60 of about 2,975 (179)

Geosynchronous synthetic aperture radar: design and applications [PDF]

open access: yes, 2009
Synthetic Aperture Radar (SAR) imaging from geosynchronous orbit has significant potential advantages over conventional low-Earth orbit (LEO) radars, but also challenges to overcome.
Bruno, Davide
core  

Spatially extensive estimates of annual accumulation in the dry snow zone of the Greenland Ice Sheet determined from radar altimetry [PDF]

open access: yes, 2010
We present estimates of accumulation rate along a 200 km transect ranging in elevation from 2750 to 3150 m in the dry snow zone on the western slope of the Greenland Ice Sheet.
Guo, Q.   +21 more
core   +1 more source

Using radar altimetry to update a large-scale hydrological model of the Brahmaputra river basin [PDF]

open access: yes, 2014
Measurements of river and lake water levels from space-borne radar altimeters (past missions include ERS, Envisat, Jason, Topex) are useful for calibration and validation of large-scale hydrological models in poorly gauged river basins.
Berry, P. A. M.   +8 more
core   +1 more source

Jason-1/Jason-2 metocean comparisons and monitoring [PDF]

open access: yes, 2010
The initial tandem phase of the Jason-2 mission is important for the calibration of the entire altimetric system, not just the records of sea surface height.
Quartly, Graham D., Graham D. Quartly
core   +1 more source

Nanosats for Radar Altimetry

open access: yes, 2015
Radar altimeters such as TOPEX/Poseidon and Jason-2 measure the sea surface height as well as wave height and wind speed, providing key information about the ocean. The U.S.
Mroczek, Austin, Jacobs, Gregg
core  

BASIC RADAR ALTIMETRY TOOLBOX AND RADAR ALTIMETRY TUTORIAL: A NEW SET OF TOOLS FOR ALL ALTIMETRY USERS

open access: yes, 2014
Since 1991, several altimetry satellites have been launched, each satellite coming with its own, specific, data format. Moreover, high-level data were developed, using yet other formats.
Joël Dor   +6 more
core  

Lake studies from satellite radar altimetry

open access: yesComptes Rendus. Géoscience, 2006
For more than 10 years, satellite radar altimetry has been a successful technique for monitoring the variation in elevation of continental surface water, such as inland seas, lakes, rivers, and more recently wetland zones. The surface water level is measured within a terrestrial reference frame with a repeatability varying from 10 ...
Jean-François Crétaux, Charon Birkett
openaire   +1 more source

Getting around Antarctica: new high-resolution mappings of the grounded and freely-floating boundaries of the Antarctic ice sheet created for the International Polar Year [PDF]

open access: yes, 2011
The boundary of grounded ice and the location of ice transitioning to a freely floating state are mapped at 15-m resolution around the entire continent of Antarctica.
Rotschkly, G.   +55 more
core   +1 more source

Dual Frequency Radar Altimetry-Measuring Greenland Firn Properties from Space [PDF]

open access: yes, 2018
For the last eight years, the ESA CryoSat-2 Ku-band radar altimeter has been measuring the elevation of the Greenland Ice Sheet. Ku-band enables surface penetration at firn covered areas, which hampers the direct interpretation of surface elevation ...
Simonsen, S.   +3 more
core  

Inversion of Surface Soil Moisture from Radar Altimetry Backscattering in Semi-Arid Environments

open access: yes, 2018
International audienceSurface Soil Moisture (SSM) is a key parameter of water and energy balances in semi-arid areas. SSM is linearly related to the radar backscattering coefficients (σ0) over sand.
Fabien Blarel   +13 more
core   +1 more source

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