Results 321 to 330 of about 6,360,179 (406)
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Science, 1991
Full disk images of Mars have been obtained with the use of the Very Large Array (VLA) to map the radar reflected flux density. The transmitter system was the 70-m antenna of the Deep Space Network at Goldstone, California. The surface of Mars was illuminated with continuous wave radiation at a wavelength of 3,5 cm.
Muhleman, Duane O. +3 more
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Full disk images of Mars have been obtained with the use of the Very Large Array (VLA) to map the radar reflected flux density. The transmitter system was the 70-m antenna of the Deep Space Network at Goldstone, California. The surface of Mars was illuminated with continuous wave radiation at a wavelength of 3,5 cm.
Muhleman, Duane O. +3 more
openaire +3 more sources
Through Fog High-Resolution Imaging Using Millimeter Wave Radar
Computer Vision and Pattern Recognition, 2020This paper demonstrates high-resolution imaging using millimeter Wave (mmWave) radars that can function even in dense fog. We leverage the fact that mmWave signals have favorable propagation characteristics in low visibility conditions, unlike optical ...
Junfeng Guan +4 more
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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.
P. Martin-Kaye +15 more
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Polarimetric Radar Imaging: From Basics to Applications
, 2009Overview of Polarimetric Radar Imaging Brief History of Polarimetric Radar Imaging SAR Image Formation: Summary Airborne and Space-Borne PolSAR Systems Description of the Remaining Chapters Electromagnetic Vector Wave and Polarization Descriptors ...
Jong-Sen Lee, E. Pottier
semanticscholar +1 more source
Compressive Radar Imaging [PDF]
2007 IEEE Radar Conference, 2007 We introduce a new approach to radar imaging based on the concept of compressive sensing (CS). In CS, a low-dimensional, nonadaptive, linear projection is used to acquire an efficient representation of a compressible signal directly using just a few measurements.
Philippe Steeghs, Richard G. Baraniuk
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An Advanced Nonlinear Frequency Modulation Waveform for Radar Imaging With Low Sidelobe
IEEE Transactions on Geoscience and Remote Sensing, 2019With the development of high-resolution radar satellite for global comprehensive environmental monitoring, day-and-night and all-weather surveillance has become an active and growing research field. However, in all cases, these applications require radar
Guodong Jin +7 more
semanticscholar +1 more source
Imaging with Radar Returns [PDF]
, 1978 Abstract : This dissertation presents both analytic and processing techniques for various radar imaging systems. A two dimensional system classification method, which is very general and hence applies to the special case of radar imaging systems as well, is proposed to assist in understanding the structure and describing the limitations of 2-D systems.
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Journal of Geophysical Research, 1976
The paper presents a set of seven radar brightness images and the corresponding altitude contours of small portions (circular regions of 1500-km diameter) of the Venus surface located at the center of the disk taken in the winter of 1973-1974. The regions imaged are arranged in an equatorial belt on the one face of Venus which is always seen on the ...
R.R. Green +2 more
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The paper presents a set of seven radar brightness images and the corresponding altitude contours of small portions (circular regions of 1500-km diameter) of the Venus surface located at the center of the disk taken in the winter of 1973-1974. The regions imaged are arranged in an equatorial belt on the one face of Venus which is always seen on the ...
R.R. Green +2 more
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Chip‐Based Microwave‐Photonic Radar for High‐Resolution Imaging
Laser & Photonics reviews, 2020Radar is the only sensor that can realize target imaging at all time and all weather, which would be a key technical enabler for future intelligent society.
Simin Li +9 more
semanticscholar +1 more source
Radar Systems (RADAR 97), 1997
In this paper an algorithm based on emerging data compression techniques and suitably adapted to the radar data of a VTS (Vessel Traffic Service) System is presented. The basic idea derives from the JPEG (Joint Photographic Experts Group) standard which converts image data to a spatial frequency representation using a 2-D discrete cosine transform (DCT)
V. Sabbatino, S. Bottalico
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In this paper an algorithm based on emerging data compression techniques and suitably adapted to the radar data of a VTS (Vessel Traffic Service) System is presented. The basic idea derives from the JPEG (Joint Photographic Experts Group) standard which converts image data to a spatial frequency representation using a 2-D discrete cosine transform (DCT)
V. Sabbatino, S. Bottalico
openaire +2 more sources