Results 251 to 260 of about 128,809 (312)
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16th European Microwave Conference, 1986, 1986
This paper is concerned with the problem of obtaining an image by means of a spatially coherent radar signal processing. After a brief review of the above technique, the problems of motion compensation (target tracking) and of 2D-Fourier inversion, arising in practical realisations, are discussed. In addition, the possibility of extending the theory to
GCorsini +4 more
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This paper is concerned with the problem of obtaining an image by means of a spatially coherent radar signal processing. After a brief review of the above technique, the problems of motion compensation (target tracking) and of 2D-Fourier inversion, arising in practical realisations, are discussed. In addition, the possibility of extending the theory to
GCorsini +4 more
openaire +2 more sources
Proceedings of the 16th International Workshop on Mobile Computing Systems and Applications, 2015
Mobile computing is undergoing a significant shift. Where traditional mobile networks revolved around users and their movements, new networks often center around autonomous mobile agents. These include semi-autonomous drones on military missions, vacuum robots search for dirt at home, intelligent cars that deliver us to work, and first responder robots
Yibo Zhu +4 more
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Mobile computing is undergoing a significant shift. Where traditional mobile networks revolved around users and their movements, new networks often center around autonomous mobile agents. These include semi-autonomous drones on military missions, vacuum robots search for dirt at home, intelligent cars that deliver us to work, and first responder robots
Yibo Zhu +4 more
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International Journal of Imaging Systems and Technology, 1992
AbstractRadar systems combining coherent signals with frequency and angular diversity offer the possibility of synthesizing images of complex objects with spatial resolution of a few wavelengths. The availability of high‐quality microwave sources and components, high‐speed digital computers, and efficient signal‐processing algorithms allows radar ...
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AbstractRadar systems combining coherent signals with frequency and angular diversity offer the possibility of synthesizing images of complex objects with spatial resolution of a few wavelengths. The availability of high‐quality microwave sources and components, high‐speed digital computers, and efficient signal‐processing algorithms allows radar ...
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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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Science, 1976
A new radar image of Venus covering the latitude range 46° to 75° and the approximate longitude range 290° to 10° is shown. The resolution is approximately 20 kilometers.
D B, Campbell +2 more
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A new radar image of Venus covering the latitude range 46° to 75° and the approximate longitude range 290° to 10° is shown. The resolution is approximately 20 kilometers.
D B, Campbell +2 more
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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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Shuttle Imaging Radar Experiment
Science, 1982The shuttle imaging radar (SIR-A) acquired images of a variety of the earth's geologic areas covering about 10 million square kilometers. Structural and geomorphic features such as faults, folds, outcrops, and dunes are clearly visible in both tropical and arid regions.
C, Elachi +15 more
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International Journal of Imaging Systems and Technology, 1991
AbstractThe Seasat and Shuttle imaging radars flown in the 1970s and 1980s established a strong scientific and technical base for a number of imaging radars that are flying or under development. Recent advances in understanding wave‐surface interactions, utilization of multispectral and polarimetric data, as well as advances in microwave and electronic
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AbstractThe Seasat and Shuttle imaging radars flown in the 1970s and 1980s established a strong scientific and technical base for a number of imaging radars that are flying or under development. Recent advances in understanding wave‐surface interactions, utilization of multispectral and polarimetric data, as well as advances in microwave and electronic
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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.
Gianluca Gennarelli +3 more
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Imaging radar polarimetry: a review
Proceedings of the IEEE, 1991Presents a tutorial review of the broad sweep of topics relating to imaging radar polarimetry, ranging from mathematical foundations to hardware and from implementation approaches to signal processing and calibration. The authors examine current developments in sensor technology and implementation for recording polarimetric measurements, and describe ...
Howard A. Zebker, Jakob J. van Zyl
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