Results 21 to 30 of about 624,911 (207)

River ice phenology and thickness from satellite altimetry: potential for ice bridge road operation and climate studies [PDF]

open access: yesThe Cryosphere, 2021
River ice is a key component of the cryosphere. Satellite monitoring of river ice is a rapidly developing area of scientific enquiry, which has wide-ranging implications for climate, environmental and socioeconomic applications.
E. Zakharova   +6 more
doaj   +1 more source

Preface: 25 years of progress in radar altimetry

open access: yesAdvances in Space Research, 2021
International ...
Benveniste, Jérôme, Bonnefond, P.
openaire   +2 more sources

Satellite Remote Sensing of the Greenland Ice Sheet Ablation Zone: A Review

open access: yesRemote Sensing, 2019
The Greenland Ice Sheet is now the largest land ice contributor to global sea level rise, largely driven by increased surface meltwater runoff from the ablation zone, i.e., areas of the ice sheet where annual mass losses exceed gains.
Matthew G. Cooper, Laurence C. Smith
doaj   +1 more source

Ice-sheet elevations from across-track processing of airborne interferometric radar altimetry [PDF]

open access: yes, 2009
Interferometric Radar Altimeters (IRA's) use dual receive antennas to overcome one of the spatial limitations of pulse-limited altimeters. In a conventional IRA measurement, the range and across-track direction of a scatterer are determined using the ...
Cullen, R.   +9 more
core   +1 more source

SAR, SARin, RDSAR and FF-SAR Altimetry Processing on Demand for Cryosat-2, Sentinel-3 & Sentinel-6 at ESA's Altimetry Virtual Lab [PDF]

open access: yesProceedings of the International Association of Hydrological Sciences
This paper presents the RDSAR, SAR/SARin & FF-SAR altimetry processors available in the ESA Altimetry Virtual Lab (AVL) hosted on the EarthConsole® platform. An overview on processors and features as well as preliminary analyses using AVL output data
J. Benveniste   +12 more
doaj   +1 more source

The impact of snow depth, snow density and ice density on sea ice thickness retrieval from satellite radar altimetry: results from the ESA-CCI Sea Ice ECV Project Round Robin Exercise [PDF]

open access: yesThe Cryosphere, 2015
We assess different methods and input parameters, namely snow depth, snow density and ice density, used in freeboard-to-thickness conversion of Arctic sea ice. This conversion is an important part of sea ice thickness retrieval from spaceborne altimetry.
S. Kern   +7 more
doaj   +1 more source

Sea state and rain: a second take on dual-frequency altimetry [PDF]

open access: yes, 2004
TOPEX and Jason were the first two dual-frequency altimeters in space, with both operating at Ku- and C-band. Each thus gives two measurements of the normalized backscatter, sigma0, (from which wind speed is calculated) and two estimates of wave height ...
Quartly, G.D.
core   +1 more source

Sea surface height measuring using InSAR altimeter

open access: yesGeodesy and Geodynamics, 2017
Satellite altimetry has been widely used in measuring ocean topography from space. The conventional altimeter system is the nadir radar altimeter system which has the limitations of one-dimensional measurement and is unable to get both high temporal and ...
Xiaohong Sui   +4 more
doaj   +1 more source

Altimetry for the future: Building on 25 years of progress [PDF]

open access: yes, 2021
\ua9 2021 COSPARIn 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have
Spatar C   +3 more
core   +4 more sources

Waveform Aliasing in Satellite Radar Altimetry

open access: yesIEEE Transactions on Geoscience and Remote Sensing, 2015
The full deramp pulse compression scheme employed by satellite radar altimeters digitizes each radar echo at a sampling rate matched to the chirp bandwidth. Echo power is undersampled by a factor of 2 when the power samples are simply obtained by squaring the magnitude of the echo samples, without first resampling, as is done in all altimeters to date.
Walter H. F. Smith, Remko Scharroo
openaire   +2 more sources

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