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Imaging of Snow/Ice Subsurface Features from Airborne Sar At UHF, L And X Band. The Onera Sar Campaign in South Greenland
2019
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium
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Three sites were imaged, one in the accumulation zone North of the polar circle (East of Kangerlussuaq airport), one in the accumulation zone in a warmer southern area (East of Narsassuaq airport) and ...
An acquisition campaign of the ONERA airborne synthetic aperture radar system RAMSES have been set up on the Greenland ice-shelf to assess the detectability of buried objects and subsurface feature through ...
RESULTS FROM NADIR LOOKING (SOUNDING) SAR IMAGE MODE Though the antennae were pointed to the side (45 • down wing at UHF & L band and 30 or 50 • at X band), significant side lobe (especially for V polarisation ...
doi:10.1109/igarss.2019.8898600
dblp:conf/igarss/Cantalloube19
fatcat:xlt67gjomrdqvdpxfbpcjjd2da
Onera Campaign in South Greenland for Imaging of Snow/Ice Subsurface Features from Airborne SAR
2019
2019 International Radar Conference (RADAR)
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The engine fragment plume of the unconfined engine #4 failure of the F-HPJE (about 190 days earlier) was in the middle of the percolated accumulation zone, providing several known buried fragments, as ...
Three bands where investigated UHF, L and X band expecting a tradeoff between cover penetration and target radar cross-section, the latter being critical due to the expected high clutter radar cross-section ...
This was later corroborated by comparing the ice shelf altitude derived from LIDAR measurement and radar interferometry. ...
doi:10.1109/radar41533.2019.171403
fatcat:nwsmtaicencfnbsknikp4o5c2e
Table of contents
2020
IEEE Transactions on Geoscience and Remote Sensing
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Eltoft 5162 Opposite-Side Ambiguities in Radar Sounding Interferometry ................................................................. .............................................................. ...
Polyushkina 5058 Processing, Sensors and Systems for: Radar Data Ambiguity Function of MIMO Radar Based on Quasi-Orthogonal Ultrawideband-Throb Signals ........................ ........................ ...
doi:10.1109/tgrs.2020.2998593
fatcat:6li5sdy3nrfnxbveudd77nj5ay
Observations of colocated optical and radar aurora
2006
Journal of Geophysical Research
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In addition, in situ rocket electric field measurements in the vicinity of an auroral arc are presented in a separate case study. ...
The radar aurora is the backscattering of radar waves from these irregularities. ...
Ambiguity in azimuth and elevation of the backscatter is resolved using interferometry and aperture synthesis imaging [Hysell and Chau, 2006] . ...
doi:10.1029/2006ja011923
fatcat:zf6zvqjjrrfoxawgzpugfuh5xe
Radar mapping of Isunnguata Sermia, Greenland
2013
Journal of Glaciology
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Ice thickness estimates using advanced nadir sounding and tomographic radar processing techniques are compared and combined in a study of Isunnguata Sermia glacier, Greenland. ...
Analysis shows that tomographic data better capture short wavelength (1–2 km) patterns in basal terrain, but interpolated nadir sounding data yield more spatially extensive and continuous coverage across ...
Off nadir, there may also be simultaneous echoes from the base originating from the opposite sides of the airplane. In addition, there will be thermal and other noise sources. ...
doi:10.3189/2013jog12j248
fatcat:hntkqk6o6bhqdk5b2rgxuv72b4
Radio-Frequency Interferometry—A new technique For studying glaciers
1974
Journal of Glaciology
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A new method of electromagnetic sounding in resistive electrical environments has been developed for use in lunar exploration. It is applicable to the study of terrestrial glaciers and ice sheets. ...
0.35 (where f is in MHz). ...
ACKNOWLEDGEMENTS We appreciate permission from the Canadian National Park Service to work in Jasper National Park. Financial support was provided by NASA under Contract NASg-11540. ...
doi:10.1017/s0022143000023431
fatcat:cmw5zxokijf7zoh3w365ztlzoi
Imaging radar observations and theory of type I and type II quasi-periodic echoes
2002
Journal of Geophysical Research
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Midlatitude E region plasma irregularities have been investigated using the Middle and Upper Atmosphere (MU) radar in Shigaraki, Japan, and the Clemson 30 MHz radar in South Carolina, USA. ...
Several long, continuous bands of scatterers are also evident in the radar images. Received X; revised X; accepted X. ...
Larsen for helping with the fielding and operation of the Clemson radar. The MU radar belongs to and is operated by the Radio Science Center for Space and Atmosphere (RASC) of Kyoto University. ...
doi:10.1029/2002ja009292
fatcat:k4lz5yxlv5efvbiixzvbcm7glu
Ocean Surface Observations Using the TanDEM-X Satellite Formation
2015
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
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Index Terms-Ocean surface currents, SAR along-track interferometry (ATI), TanDEM-X. ...
This way, radar imaging of surface currents with unprecedented accuracy, high spatial resolution and wide coverage at the same time becomes possible. ...
In the uncorrected case (a), implausible jumps of the flow to the opposite direction (blue) are visible, which correspond to untreated phase ambiguities. ...
doi:10.1109/jstars.2015.2446893
fatcat:k2umox55ubbxjnniicsuk3k5aa
Interferometric synthetic-aperture radar (InSAR)
[chapter]
2007
Volcano Deformation
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Side-looking radar systems are classified as either real-aperture (called SLAR for sidelooking airborne radar or SLR for side-looking radar) or synthetic-aperture radar (SAR). ...
The anomalies will have similar shapes and sizes but opposite signs, Principles of SAR interferometry 179 Figure 5 .15. ...
doi:10.1007/978-3-540-49302-0_5
fatcat:ifnqjgd5ozfspnuchxbwrqptw4
Synthetic aperture radar interferometry
2000
Proceedings of the IEEE
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By exploiting the phase of the coherent radar signal, interferometry has transformed radar remote sensing from a largely interpretive science to a quantitative tool, with applications in cartography, geodesy ...
Synthetic aperture radar interferometry is an imaging technique for measuring the topography of a surface, its changes over time, and other changes in the detailed characteristics of the surface. ...
Rogers and Ingalls [7] reported the first application of interferometry to radar, removing the "north-south" ambiguity in range-range rate radar maps of the planet Venus made from Earth-based antennas ...
doi:10.1109/5.838084
fatcat:p6htog22o5hb5foaou5ax3pt4a
Glaciers and Ice Sheets Mapping Orbiter concept
2006
Journal of Geophysical Research
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will enable us to reduce signal contamination from surface clutter, measure the topography of the glacier bed at better than 1 km intervals with an accuracy of 20 m, and paint a picture of variations in ...
We describe a concept for a spaceborne radar system designed to measure the surface and basal topography of terrestrial ice sheets and to determine the physical properties of the glacier bed. ...
The later is one of the main reasons why airborne sounding radars are flown at low altitudes. ...
doi:10.1029/2005je002572
fatcat:5cz72msa5vebtebgikw3y22jfu
Active Optical Range Imaging Sensors
[chapter]
1989
Springer Series in Perception Engineering
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At least six different optical principles have been used to actively obtain range images: (1) radar, (2) triangulation, (3) moire, (4) holographic interferometry, (5) focusing, and (6) diffraction. ...
They are unique imaging devices in that the image data points explicitly represent scene surface geometry in a sampled form. ...
The illuminated bright spot is viewed via the opposite side of the mirror (and a symmetrically positioned fixed detector mirror). ...
doi:10.1007/978-1-4612-4532-2_1
fatcat:jacqk6hhwzf73nvhonxitx6d6q
Active, optical range imaging sensors
1988
Machine Vision and Applications
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At least six different optical principles have been used to actively obtain range images: (1) radar, (2) triangulation, (3) moire, (4) holographic interferometry, (5) focusing, and (6) diffraction. ...
They are unique imaging devices in that the image data points explicitly represent scene surface geometry in a sampled form. ...
The illuminated bright spot is viewed via the opposite side of the mirror (and a symmetrically positioned fixed detector mirror). ...
doi:10.1007/bf01212277
fatcat:lmfx4oehf5be3eh7tgxxuu3lju
Dynamic Assessment of Masonry Towers Based on Terrestrial Radar Interferometer and Accelerometers
2019
Sensors
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High-speed radar interferometry is an innovative and powerful remote sensing technique for the dynamic monitoring of large structures since it is contactless, non-destructive, and able to measure fast ...
Dynamic tests were conducted in operational conditions as well as during a bell concert. ...
The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results. ...
doi:10.3390/s19061319
fatcat:6urvnpyytngp5kfhfikgthfegq
Capabilities of Dual-Frequency Millimeter Wave SAR With Monopulse Processing for Ground Moving Target Indication
2007
IEEE Transactions on Geoscience and Remote Sensing
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Ground moving target indication (GMTI) for syn-thetic aperture radar (SAR) provides information on nonstatic objects in radar imagery of a static ground scene. ...
elimination and target velocity ambiguity resolving by dual-frequency SAR. ...
T 10 was moving in the opposite direction at 25.0 m/s and ∆ equal to 0.1 m/s. Ground-based radar and laser measured T 9 moving at 22.5 m/s and T 11 at 23.9 m/s. ...
doi:10.1109/tgrs.2006.888464
fatcat:p7v5ipeltza5jfnzchwc2ddddy
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