Results 341 to 350 of about 6,360,179 (406)
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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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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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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.
Gennarelli Gianluca +3 more
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Multipath ghost elimination for through‐wall radar imaging
IET Radar, Sonar & Navigation, 2016In through-wall radar imaging, the multipath echoes caused by specular reflections at interior walls of an enclosed room will lead to multipath ghosts in the resulting image.
X. Chen, Weidong Chen
semanticscholar +1 more source
2020
Radar as a coherent imager is physically based on the wave equations that govern the behavior of wave-targets interactions through the process of radiation, transmission, propagation, and reflection/refraction. This chapter briefly introduces the stochastic wave equations at a minimum but sufficient level to serve as fundamentals of radar imaging ...
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Radar as a coherent imager is physically based on the wave equations that govern the behavior of wave-targets interactions through the process of radiation, transmission, propagation, and reflection/refraction. This chapter briefly introduces the stochastic wave equations at a minimum but sufficient level to serve as fundamentals of radar imaging ...
openaire +2 more sources
Photonics Research, 2019
Photonics-based radar with a photonic de-chirp receiver has the advantages of broadband operation and real-time signal processing, but it suffers from interference from image frequencies and other undesired frequency-mixing components, due to single ...
Xingwei Ye +3 more
semanticscholar +1 more source
Photonics-based radar with a photonic de-chirp receiver has the advantages of broadband operation and real-time signal processing, but it suffers from interference from image frequencies and other undesired frequency-mixing components, due to single ...
Xingwei Ye +3 more
semanticscholar +1 more source
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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The Technology of Radar Imaging
2009This chapter provides the technical basis for imaging radar. It is broken into two parts, the first of which develops the system itself, showing how spatial resolution can be obtained and how an image is formed. The second section focuses on the target – which can be a discrete entity such as a house or a calibration device, or a distributed medium ...
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Study on the theory and method of vortex-electromagnetic-wave-based radar imaging
, 2016Helical phase fronts and orbital angular momentum of the vortex electromagnetic (EM) wave are applied to radar imaging at microwave frequencies and comprehensive simulations are conducted. Results demonstrate that an incrementally phased uniform circular
Kang Liu +5 more
semanticscholar +1 more source