Results 321 to 330 of about 7,135,260 (382)
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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
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
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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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
semanticscholar +1 more source
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. M. Goldstein +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. M. Goldstein +2 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 ...
openaire +1 more source
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
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
openaire +1 more source
Passive OAM-Based Radar Imaging With Single-In-Multiple-Out Mode
IEEE Microwave and Wireless Components Letters, 2018In recent years, the orbital angular momentum (OAM) has been widely applied in the target detection and imaging to improve the performance of conventional radar systems. A passive OAM-based radar imaging method is studied in this letter.
Kang Liu +3 more
semanticscholar +1 more source
Assessment of a micro-UAV system for microwave tomography radar imaging
Remote Sensing of Environment, 2018Micro-Unmanned Aerial Vehicles (UAVs) are flexible observation platforms suitable to cover inaccessible areas on demand. Accordingly, huge attention is deserved towards development of miniaturized sensing technologies compliant with UAV payload ...
G. Ludeno +5 more
semanticscholar +1 more source