Results 301 to 310 of about 239,405 (340)
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Physics Bulletin, 1984
Why is there so much interest in space radar systems? Radar is the way to monitor changing events in a reliable manner as it is largely independent of weather – particularly useful for Europe which is so often widely cloud-covered.
P H A Martin-Kaye, G M Lawrence
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Why is there so much interest in space radar systems? Radar is the way to monitor changing events in a reliable manner as it is largely independent of weather – particularly useful for Europe which is so often widely cloud-covered.
P H A Martin-Kaye, G M Lawrence
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2005
All radar targets can be classified into point and complex targets. A point target is a convenient model object commonly used in radar science and practice to solve certain types of problems. It is defined as a target located at distance R from a radar at the viewing point '0', which scatters the incident radar radiation isotropically.
A. Pasmurov, J. Zinoviev
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All radar targets can be classified into point and complex targets. A point target is a convenient model object commonly used in radar science and practice to solve certain types of problems. It is defined as a target located at distance R from a radar at the viewing point '0', which scatters the incident radar radiation isotropically.
A. Pasmurov, J. Zinoviev
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Radar imaging of the lunar poles
Nature, 2003Long-wavelength measurements reveal a paucity of ice in the Moon's polar craters. We have used a radio telescope at Arecibo Observatory, Puerto Rico, to map features of the lunar poles — some as small as 300 metres across — by collecting long-wavelength radar images that can penetrate several metres of lunar dust.
Campbell, Bruce A. +5 more
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IEEE Transactions on Aerospace and Electronic Systems, 1984
Using range and Doppler information to produce radar images is a technique used in such diverse fields as air-to-ground imaging of objects, terrain, and oceans and ground-to-air imaging of aircraft, space objects, and planets. A review of the range-Doppler technique is presented along with a description of radar imaging forms including details of data ...
Jack L. Walker +4 more
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Using range and Doppler information to produce radar images is a technique used in such diverse fields as air-to-ground imaging of objects, terrain, and oceans and ground-to-air imaging of aircraft, space objects, and planets. A review of the range-Doppler technique is presented along with a description of radar imaging forms including details of data ...
Jack L. Walker +4 more
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IEEE Transactions on Geoscience Electronics, 1978
A radar image simulation model, which can be used to aid interpretation of images and information extraction from images, has been developed and implemented on a digital computer. The model, called the "Point Scattering Model," is a mathematically rigorous treatment of the stochastic process described by the closed system consisting of the radar ...
Julian C. Holtzman +3 more
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A radar image simulation model, which can be used to aid interpretation of images and information extraction from images, has been developed and implemented on a digital computer. The model, called the "Point Scattering Model," is a mathematically rigorous treatment of the stochastic process described by the closed system consisting of the radar ...
Julian C. Holtzman +3 more
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Icarus, 1972
Radar scans of Venus have yielded a brightness map of a large portion of the surface. The bright area in the south (alpha) and the twin such areas in the north (beta and delta) were first discovered by spectral analysis of radar echos. When range-gating is also applied, their shapes are revealed, and they are seen to be roundish and about 1000 km ...
Richard M. Goldstein, H.C. Rumsey
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Radar scans of Venus have yielded a brightness map of a large portion of the surface. The bright area in the south (alpha) and the twin such areas in the north (beta and delta) were first discovered by spectral analysis of radar echos. When range-gating is also applied, their shapes are revealed, and they are seen to be roundish and about 1000 km ...
Richard M. Goldstein, H.C. Rumsey
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The modeling of radar image based on radar textures
AIP Conference Proceedings, 2020The paper is devoted to the development of a mathematical model of the terrain radar image created by the onboard radar. The model is based on the ray tracing method and takes into account the reflective properties of the surface using a special radar texture function The radar texture function is complex-valued function of the three 3D-vector ...
V. B. Kostousov, S. V. Kiseleva
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Fractures In Limestone Imaged By Radar
11th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1998Radar data collected along profiles and in grids have assisted in identifying subsurface pathways that might carry motor fuel known to be contaminating domestic water wells. Disruptions of reflections were visible in conventional radar profiles were interpreted as fractures zone in limestone bedrock. Radar data acquired in a grid over zones where these
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Engineering Science & Education Journal, 1999
Spaceborne radars are able to image ocean surface features, providing useful information on a global basis regardless of the weather conditions (especially clouds), both during the day and at night. This article explains this capability and provides illustrations of some of the results obtained.
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Spaceborne radars are able to image ocean surface features, providing useful information on a global basis regardless of the weather conditions (especially clouds), both during the day and at night. This article explains this capability and provides illustrations of some of the results obtained.
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Radar Imaging Through a Building Corner
IEEE Transactions on Geoscience and Remote Sensing, 2014Through-wall imaging (TWI) requires dealing with targets embedded in a complex obscuring environment such as the walls of a building. This obscuring layout is often composed by many simple elements (possibly interacting) such as slabs, corners, and T-like structures.
G. Gennarelli +3 more
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