Results 271 to 280 of about 4,109,816 (309)
Some of the next articles are maybe not open access.

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,
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
openaire   +2 more sources

Measuring sea ice thickness

Hydrographische Nachrichten, 2023
This work explores the potential of using commercial single-beam echo sounders for accurate thickness determination of sea ice. Therefore, an own sensor system has been developed which allows to study the performance of different echo sounders monitoring sea ice under varying environmental conditions in a laboratory setup. The sensor system consists of
openaire   +1 more source

Influences of gas bubble and ice density on ice thickness measurement by GPR

Applied Geophysics, 2010
Lake ice thickness changes with regional hydrometeorology and is closely associated with global climate change. We tested the detection of ice thickness using ground penetrating radar (GPR) in the Hongqipao reservoir. Ice crystals, gas bubbles, ice density and ice thickness were also determined by concurrently drilling for validation.
Zhi-Jun Li   +5 more
openaire   +1 more source

Ultrawideband Radar Measurements of Thickness of Snow Over Sea Ice

IEEE Transactions on Geoscience and Remote Sensing, 2007
An accurate knowledge of snow thickness and its variability over sea ice is crucial in determining the overall polar heat and freshwater budget, which influences the global climate. Recently, algorithms have been developed to extract snow thicknesses from satellite passive microwave data.
Pannirselvam Kanagaratnam   +6 more
openaire   +2 more sources

A wideband radar depth sounder for measuring the thickness of glacial ice

IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
We developed a wideband coherent radar depth sounder (WCORDS) system developed to measure glacial ice thickness and map internal layers with high resolution. The radar operates over a frequency range of 50-200 MHz, providing a resolution of about 1 m in ice.
Abhinay Kuchikulla   +3 more
openaire   +2 more sources

Ice Thickness Measurements on the Southern Patagonia Icefield

2002
The first detailed ice thickness measurements in the accumulation area of the Southern Patagonia Icefield have been obtained with a radio-echo sounding system, revealing a complex subglacial topography and internal reflection pattern.
Andrés Rivera, Gino Casassa
openaire   +1 more source

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

Using of Radiolocation Measuring Devices of Freshmater Ice Thickness

[Proceedings] IGARSS'91 Remote Sensing: Global Monitoring for Earth Management, 2005
The paper presents information about few devices, elaborated in Riga Institute of Civil Aviation Engineers for freshwater ice remote measurment. Devices may be installed on aircraft or automobile and make it possible to carry out reconnaissance in rivers, lakes and reservoirs, to choose ice landing zone for primary landing. Devices also can be used for
A.N. Peshkov   +4 more
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
openaire   +1 more source

Home - About - Disclaimer - Privacy