Results 11 to 20 of about 67,581 (340)
Anisotropic scattering in radio-echo sounding: insights from northeast Greenland [PDF]
The CryosphereAnisotropic scattering and birefringence-induced power extinction are two distinct mechanisms affecting the azimuthal power response in radio-echo sounding (RES) of ice sheets.
T. A. Gerber +9 more
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Comparing numerical ice-sheet model output with radio-echo sounding measurements in the Weddell Sea sector of West Antarctica [PDF]
Annals of Glaciology, 2020 Numerical ice-sheet models are commonly matched to surface ice velocities from InSAR measurements by modifying basal drag, allowing the flow and form of the ice sheet to be simulated. Geophysical measurements of the bed are rarely used to examine if this
Hafeez Jeofry +2 more
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AN AUTOMATIC EXTRACTION METHOD FOR ANTARCTIC SUBGLACIAL LAKE BASED ON RADIO ECHO SOUNDING DATA [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021 Detection of subglacial lakes and interpretation their hydrological connectivity is of great importance to understanding the mass balance of Antarctic ice sheet.
D. Wang +7 more
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Radio-Echo Sounding: Reflections From Internal Layers In Ice Sheets [PDF]
Journal of Glaciology, 1977 AbstractThe origin and nature of radio-echo internal reflections is the subject of much debate. Calculations of single- and multiple-layer reflection coefficients for dielectric changes in the ice sheet indicate that the observed reflection strength may result from reflections from many thin layers but the zone of thin layers may best be approximated ...
John W. Clough
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Airborne UHF Radio Echo-Sounding of Three Yukon Glaciers [PDF]
Journal of Glaciology, 1980 AbstractA high-resolution radio echo-sounder operating at a frequency of 840 MHz has been developed for airborne sounding of small and medium-sized polar glaciers and ice caps. The sounder uses a compact,, high-gain antenna which suppresses valley-wall echoes and simplifies operation from light aircraft, Successful field trials were carried out on ...
B. Barry Narod, Garry K. C. Clarke
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Estimating marine ice thickness beneath the Amery Ice Shelf from airborne radio-echo sounding [PDF]
Journal of GlaciologyIce shelves affect the stability of ice sheets by supporting the mass balance of ice upstream of the grounding line. Marine ice, formed from supercooled water freezing at the base of ice shelves, contributes to mass gain and affects ice dynamics.
Lijuan Wang +14 more
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Radio echo sounding in the Shirase Glacier drainage basin
Antarctic Record, 1986 Airborne radio echo sounding was carried out in order to measure the thickness of the ice sheet in the Shirase Glacier drainage basin. From the analysis of the result obtained, the bedrock topography was estimated and it was found that the elevation of ...
Shinji Mae
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Radio-echo sounding of the lambert glacier basin [PDF]
Journal of Glaciology, 1975 AbstractSeveral seasons of aerial ice-thickness soundings over the region of the Prince Charles Mountains, the Lambert Glacier system, the Amery Ice Shelf, and their drainage basin in east Antarctica have now been completed. The measurements provide detailed maps of surface topography and ice thickness over an area of about 2 X 105 km2.
Vin Morgan, W. F. Budd
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Isochronous information in a Greenland ice sheet radio echo sounding data set [PDF]
Geophysical Research Letters, 2014 AbstractThe evaluation of ice sheet models is one of the pressing problems in the study of ice sheet dynamics. Here we examine the question of how much isochronous information is contained within the publicly available Center for Remote Sensing of Ice Sheets (CReSIS) Greenland airborne radio echo soundings data set.
Sime, Louise C. +3 more
openaire +4 more sources
Miniature high-power impulse transmitter for radio-echo sounding [PDF]
Journal of Glaciology, 1994 AbstractWe have developed a miniature high-power impulse transmitter for radio-echo sounding of glaciers. It features two synchronous second break-down pulse generators operating in a differential configuration. Specifications include bipolar 550 V pulses having rise times less than 2 ns, 512 Hz repetition rate, 180 mA at 10-14 V d.c.
B. Barry Narod, Garry K. C. Clarke
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