Results 291 to 300 of about 519,963 (333)

Method for continuous measurement of ice cover thickness

Cold Regions Science and Technology, 1995
The objective of this study was to evaluate a method for continuous measurement of ice cover thickness. The measuring device consists of a water-filled bucket, floating with its brim at the water surface. A pipe is vertically mounted at the centre of the bucket and capped with an oil-filled balloon.
Bo Nordell, Göran Westerström
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Airborne Ice Thickness Measurement System - Opportunities and Impacts

Arctic Technology Conference, 2016
Abstract In ice frequented regions, the potential for large ice floes and extreme ice features encroaching on offshore structures can be significant. An early warning system is desired to discriminate between thin ice of no risk and thick ice with significant challenge.
D. Power, T. Stuber, D. Rowsell, I. Zakharov, C. Fowler, V. Garas Yanni, X. Yi, B. Power, S. Green, J. Ryan, S. Hale   +10 more
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High-resolution penetrating radar for ice thickness measurement

2012 14th International Conference on Ground Penetrating Radar (GPR), 2012
We have developed a high-resolution penetrating radar to measure glacial ice thickness. With an operating frequency band of 100–150 MHz, this radar can provide a range resolution of less than 2 m in ice. The radar is designed to measure ice sheet thickness up to 3000 m.
null Wang Wenpeng, null Zhao Bo, null Liu Xiaojun, null Yu Jian, null Fang Guangyou   +4 more
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Shipborne electromagnetic measurements of Antarctic sea‐ice thickness

GEOPHYSICS, 2003
We present a study of Antarctic sea‐ice thickness estimates made using a shipborne Geonics EM31 electromagnetic (EM) instrument, based on both 1D and 3D models. Apparent conductivities measured in the vertical coplanar (VCP) geometry are shown to be the measured quantity most sensitive to changes in the height of the instrument above seawater.
James E. Reid, Anthony P. Worby, Julian Vrbancich, Angus I. S. Munro   +3 more
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Ice Thickness Distribution — Measurement and Theory

1986
In considering the historical literature relevant to the subject of ice thickness distribution, I was struck by the paper by Wittmann and Schule (1966) at the Lake Arrowhead symposium on the Arctic heat budget. They presented a synthesis of visual observations from aircraft showing ice concentration, lead spacings, percent coverage of several ice types,
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Upward looking ice profiler sonar instruments for ice thickness and topography measurements

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600), 2005
Scientific and engineering studies in polar and marginal ice zones require detailed information on sea ice thickness and topography. Until recently, vertical ice dimension data have been largely inferred from aerial and satellite remote-sensing sensors.
D.B. Fissel, J.R. Marko, H. Melling
openaire   +1 more source

Measurement of ice thickness based on binocular vision camera

2017 IEEE International Conference on Mechatronics and Automation (ICMA), 2017
This paper presents a new method to measure the ice thickness of the transmission line, which is based on the binocular visible light camera mounted on the UAV acquisiting the transmission line icing image, combined the infrared camera and word line laser.
Yi Ma, Hong Yu, Jinyu Liu, Yongsai Zhai
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Measurement of sea ice thickness with airborne electromagnetic system

54th EAEG Meeting, 1992
For winter navigation in Finland it is economically important to know the ice conditions on the sea. First tests have been done with the fixed wing airborne electromagnetic system of Geological Survey of Finland to check its capacity to measure ice thickness quickly and economically.
M. Oksama, J. Multala, H. Hautaniemi
openaire   +1 more source

Airborne Measurement of Snow Thickness over Sea Ice

IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium, 2008
Snow cover on sea ice plays an important role in the climate of the polar regions. Snow on the sea ice reduces the heat exchange between the ocean and the atmosphere by its high albedo and low thermal conductivity. The lower the albedo, the less solar energy is reflected back into the atmosphere. Data on the extent and thickness of snow cover is needed
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Measurement of Sea Ice Thickness With Airborne Electromagnetic Equipment

Offshore Technology Conference, 1989
ABSTRACT The topography along the ice water interface can be recovered from airborne electromagnetic data With an Iterative inversion scheme. This method is based on a new fast algorithm for solving the forward problem, which can be used to evaluate electromagnetic scattering by an irregular but highly conductive ...
G. Liu, A. Becker
openaire   +1 more source