Results 21 to 30 of about 86,093 (168)
Suppression of Additional Azimuth Ambiguities under Multi-Channel and Multi-Waveform SAR
IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020 Future spaceborne SAR satellites are going to handle multiple receivers to take both high resolution and wide observation swath. In addition, they will transmit multiple chirp patterns to reduce the effect of the range ambiguity. Such a multi-channel and
Prats-Iraola, Pau +3 more
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Azimuth Ambiguity Mitigation in SAR
Azimuth ambiguities occur during the acquisition of SAR data as alias effects and overlap with the useful signal, thus degrading its quality. In the case of data recorded with the F-SAR system of DLR, strong, point-like scatterers cause the worst azimuth
Grabs, Florian
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Motion Phase Compensation Methods for Azimuth Ambiguity Suppression in HRWS SAR [PDF]
Remote Sensing, 2021 The azimuth multi-channel synthetic aperture radar (SAR) is widely used in marine observation, because of its excellent imaging ability of high-resolution and wide-swath (HRWS) signals. Different from the static targets, the azimuth ambiguity of the ships on the open sea resulting from the radial motion seriously affects the SAR image quality and ship ...
Junying Yang +4 more
openaire +2 more sources
Surface Current Retrieval From TerraSAR-X Data Using Doppler Measurements [PDF]
, 2010 The purpose of this paper is to investigate the estimation of surface currents directly on stripmap TerraSAR-X data, as an alternative to Along Track Interferometry.
Thomas Fritz +7 more
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Extended Subaperture Imaging Method for Airborne Low Frequency Ultrawideband SAR Data
Sensors, 2019 The subaperture processing is one of the essential strategies for low frequency ultrawideband synthetic aperture radar (LF UWB SAR) imaging, especially for the real-time LF UWB SAR imaging because it can improve the parallelization of the imaging ...
Daoxiang An, Wu Wang, Leping Chen
doaj +1 more source
High-Resolution Wide-Swath Ambiguous Synthetic Aperture Radar Modes for Ship Monitoring
Remote Sensing, 2022 This paper proposes two high-resolution, wide-swath synthetic aperture radar (SAR) acquisition modes for ship monitoring that tolerate ambiguities and do not require digital beamforming. Both modes, referred to as the low pulse repetition frequency (PRF)
Nertjana Ustalli, Michelangelo Villano
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Remote Sensing, 2016 Synthetic Aperture Radar (SAR) ship detection is an important maritime application. However, azimuth ambiguities caused by the finite sampling of the Doppler spectrum are often visible in SAR images and are always mistaken as ships by classic detection ...
Jujie Wei +3 more
doaj +1 more source
Sensors, 2022 Channel phase calibration is a crucial issue in high resolution and wide swath (HRWS) imagery with azimuth multi-channel synthetic aperture radar (SAR) systems.
Man Zhang +3 more
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A Proposed Algorithm for Range Ambiguities Suppression in Multi-Static SAR [PDF]
, 2022 In a conventional synthetic aperture radar (SAR), good azimuth resolution and wide coverage pose contradicting requirements for the pulse repetition frequency (PRF). With a PRF tailored to a desired resolution, range ambiguities is then the main obstacle
Rodriguez Cassola, Marc +2 more
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First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor
Sensors, 2017 In spaceborne synthetic aperture radar (SAR) sensors, it is a challenging task to detect ground slow-moving targets against strong clutter background with limited spatial channels and restricted pulse repetition frequency (PRF).
Chenghao Wang +2 more
doaj +1 more source