Results 191 to 200 of about 768,249 (233)

Very High Resolution Circular SAR Imaging at X Band

2014 IEEE Geoscience and Remote Sensing Symposium, 2014
This paper presents a new acquisition capability of the ONERA RAMSES-NG SAR sensor consisting in circular imaging, and an associated experiment. Target recognition or area monitoring is tricky using classical SAR imaging because only a part of the object shape is visible.
X Dupuis
exaly   +3 more sources

Analysis of Circular Aperture SAR Image Formation

2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers, 2009
Remote surveillance using a synthetic aperture radar (SAR) flying a circular aperture offers several operational advantages over more traditional linear aperture SAR. Over the years, different SAR image formation algorithms have been proposed and analyzed. Almost exclusively, the analysis is based on straight line trajectory or linear aperture SAR.
exaly   +2 more sources

Noncoherent Imaging Experiments of Circular SAR

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
Circular synthetic aperture radar (CSAR) observes the scene by 360 degrees, the characteristics of targets from different aspects can be obtained. The noncoherent imaging is more popular since more textural features and lower speckle noise can be acquired.
Yuxiao Luo, Daoxiang An, Leping Chen, Jingwei Chen, Xiaotao Huang 0001   +4 more
openaire   +2 more sources

SAR Parametric Imaging for Circular-Plate Target

IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium, 2020
The traditional synthetic aperture radar (SAR) is an active acquisition instrument that generates radiation and captures signals backscattered from the illuminated scene. However, when the phases of each reflection path are highly similar, the received echoes may sum in a destructive way.
Yuhan Wen, Zegang Ding, Fan Feng, Yan Wang 0011, Pei Xu, Xinliang Chen, Tao Zeng 0001   +6 more
openaire   +1 more source

Circular SAR GMTI

SPIE Proceedings, 2014
We describe techniques for improving ground moving target indication (GMTI) performance in multi-channel synthetic aperture radar (SAR) systems. Our approach employs a combination of moving reference processing (MRP) to compensate for defocus of moving target SAR responses and space-time adaptive processing (STAP) to mitigate the effects of strong ...
Douglas Page, Gregory Owirka, Howard Nichols, Steven Scarborough   +3 more
openaire   +1 more source

Multiple-input multiple-output circular SAR

2014 15th International Radar Symposium (IRS), 2014
Interest on circular and multicircular SAR acquisitions has been increased in the past few years due to the inherent potentials they provide, e.g., full 3-D reconstruction and subwavelength resolution. However, one main limitation is the size of the spotlighted region, which is basically defined by the range ambiguities, the pulse repetition frequency (
Ponce, Octavio, Rommel, Tobias, Younis, Marwan, Prats, Pau, Moreira, Alberto   +4 more
openaire   +2 more sources

GMTI in Circular Sar Data Using STAP

2016 Sensor Signal Processing for Defence (SSPD), 2016
This paper presents method and results of a Ground Moving Target Indication (GMTI) experiment using multichannel Synthetic Aperture Radar (M-SAR) data collected by the four channel F-SAR system. The proposed approach is based on sub-aperture processing, Space-Time Adaptive Processing (STAP), constant false alarm rate (CFAR) thresholding and geocoding ...
Casalini, Emiliano, Henke, Daniel, Meier, Erich   +2 more
openaire   +2 more sources

FlexSAR multistatic circular SAR collection

2017 IEEE Radar Conference (RadarConf), 2017
Bistatic SAR data has advantages and disadvantages compared to monostatic data. This papers examines a combined bistatic and monostatic SAR data collection. The airborne platform used a monostatic radar system with two transmit and two receive channels in a pulsed spotlight mode. Another receive-only system was placed on an elevated mountaintop.
Chad Knight, Mark Jensen, Trevor Jewkes, Jacob Gunther   +3 more
openaire   +1 more source

A Registration Strategy for Circular SAR Noncoherent Imaging

2020 IEEE Radar Conference (RadarConf20), 2020
Circular synthetic aperture radar (CSAR) enables 360-degree observation of the scene. Compared with coherent imaging, noncoherent imaging can suppress speckle and obtain a large number of texture features. However, due to the existence of a man-made anisotropic targets and the unique imaging geometry of CSAR, the different subaperture images are quite ...
Yuxiao Luo, Daoxiang An, Xiaotao Huang, Leping Chen, Wu Wang   +4 more
openaire   +1 more source

Circular Micro-SAR for mini-UAV

2018 15th European Radar Conference (EuRAD), 2018
This paper presents a new multifunction radar that was specially designed for mini-UAV platforms. The multi-channel radar is omnidirectional, allowing great flexibility in radar- and flight operations. A demonstrator has been built, weighing 800 grams, and consuming 25 W. Flexible SAR, GMTI and novel sensing modes can be demonstrated with this system.
Otten, M.P.G., Maas, A.P.M., Bolt, R.J., Caro-Cuenca, M., Medenblik, H.   +4 more
openaire   +2 more sources