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An Improved Calibration Technique for Quasi-Monostatic Polarimetric Measurement System Using a Dihedral as the Calibration Reference

Pengfei Wu, Xiaojian Xu
2019 IEEE Transactions on Antennas and Propagation  
However, for a radar cross section (RCS) range with quasi-monostatic geometry where there exists a small bistatic angle, the polarimetric calibration error rapidly increases as the bistatic angle increases  ...  Combining the evaluation formulation with a nonlinear calibration technique, the polarimetric measurement error model can be adapted for the quasi-monostatic geometry so that accurate polarimetric calibration  ...  The polarimetric measurement error model is modified for the quasi-monostatic geometry so that accurate polarimetric calibration can be accomplished.  ... 
doi:10.1109/tap.2019.2927877 fatcat:bp5kkdlvgjhplbz4bg2wyr7qka

Table of contents

2020 IEEE Geoscience and Remote Sensing Letters  
Zhang 401 A Modified Model for Quasi-Monostatic Ground Penetrating Radar .... J. Zhang, S. Ye, Y. Lin, X. Liu, and G.  ...  Yao 416 A SAR Image Despeckling Method Using Multi-Scale Nonlocal Low-Rank Model ....................................... ................................................................................  ... 
doi:10.1109/lgrs.2020.2972782 fatcat:pyplqlwzsvaphf5q6r4e7jp54u

Structural Parameter Estimation of Australian Flora with a Ground-based Polarimetric Radar Interferometer

Z.-S. Zhou, S. Cloude
2006 2006 IEEE International Symposium on Geoscience and Remote Sensing  
The application of polarimetric SAR interferometry technology is extended to ground based radar imaging (GB-POLInSAR), which has a limited field of view but provides wide band coverage.  ...  It also provides for easier deployment of broadband and multi-baseline techniques, from which we can estimate vegetation structure and extinction propagation using model based techniques.  ...  Bates of the University of Adelaide for his support and the constructive comments on this paper.  ... 
doi:10.1109/igarss.2006.23 dblp:conf/igarss/ZhouC06 fatcat:sc2l7fv4ljhsnkocfbqzewi43m

Interferometric Baseline Performance Estimations for Multistatic Synthetic Aperture Radar Configurations Derived from GRACE GPS Observations

A. O. Kohlhase, R. Kroes, S. D'Amico
2006 Journal of Geodesy  
For cross-track interferometry in a bistatic operational mode, a mean 2D baseline error (1σ ) of 1.4 mm is derived, whereas baseline estimates necessary for a monostatic acquisition mode with a 50 km along-track  ...  For spaceborne radar interferometry in particular, such measurements will improve the accuracy of interferometric products such as digital elevation models (DEM) or surface deformation maps.  ...  Discussions with Gerhard Krieger from the DLR Microwaves and Radar Institute are greatly appreciated.  ... 
doi:10.1007/s00190-006-0027-y fatcat:whqpewu4nbdlhalsxduomtjipm

ARGOS: A fractioned geosynchronous SAR

A. Monti Guarnieri, O. Bombaci, T.F. Catalano, C. Germani, C. Koppel, F. Rocca, G. Wadge
2015 Acta Astronautica  
A swarm of N Synthetic Aperture Radar (SAR) sensors in a geostationary orbit would provide all-day-all-weather imaging within a continental region, using direct downloading for real time data exploitation  ...  In this paper, we take advantage of the preliminary concept definition of the "Advanced Radar Geosynchronous Observation System" ARGOS, to provide applications, scalable extension from a single monostatic  ...  It comprises a fractioned swarm of N neighboring quasi-geostationary compact SAR's, all receiving not only their own signal (monostatic) but also the Radar signals (bistatic) coming from the other satellites  ... 
doi:10.1016/j.actaastro.2015.11.022 fatcat:zo4xadcqtrbqhpjzs3bonvqz4q

Remote Sensing of the Polar Ice Zones with HF Radar

Stuart Anderson
2021 Remote Sensing  
Several hundreds of such radars are in operation, yet only a handful of experiments have been conducted to assess the prospect of utilizing this technology for the remote sensing of sea ice.  ...  The dispersion relations of different forms of sea ice are examined and used in a modified implementation of the electromagnetic scattering theory employed in HF radar oceanography to compute the corresponding  ...  Acknowledgments: The author is indebted to numerous colleagues in the global HF radar community for their generosity in sharing information and photographs of their HF radar systems deployed in the Arctic  ... 
doi:10.3390/rs13214398 fatcat:g22kt4zfkfakbetam3pn4u63ia

Measurements and simulation of ionospheric scattering on VHF and UHF radar signals: Channel scattering function

Neil C. Rogers, Paul S. Cannon, Keith M. Groves
2009 Radio Science  
Modeled channel scattering functions (CSFs) are compared to experimental VHF and UHF data derived from the Advanced Research Projects Agency Long-range Tracking and Instrumentation Radar on Kwajalein Island  ...  TIRPS quantitatively reproduces the experimental results, including the quasi-parabolic profile observed in the measured CSFs under strong turbulence conditions.  ...  The authors would like to thank Paul Kossey for his unfailing support in the early stages of this UK-U.S. collaborative program.  ... 
doi:10.1029/2008rs004033 fatcat:7ftzqdvdkngdtjvpqozf6izaji

A Quasi-Quadratic Inverse Scattering Approach to Detect and Localize Metallic Bars within a Dielectric

Adriana Brancaccio
2022 Applied Sciences  
The dielectric was placed in air and illuminated from the outside using a linear microwave source and a multi-monostatic configuration.  ...  By exploiting the knowledge of the permittivity of the dielectric and the shape of its section, a relatively simple approximate expression for the scattered field was derived, which allowed for formulation  ...  How-ever, sometimes the structure is not accessible from all around, and only reflection-mode illumination, which is typical, for instance, of ground-penetrating radar applications, is allowed.  ... 
doi:10.3390/app12189217 fatcat:pzueu6swyvcmzlti7l2u77jcry

A Synthetic Aperture Radar (SAR)-Based Technique for Microwave Imaging and Material Characterization

Yuri Álvarez López, María García Fernández, Raphael Grau, Fernando Las-Heras
2018 Electronics  
This contribution presents a simple and fast Synthetic Aperture Radar (SAR)-based technique for microwave imaging and material characterization from microwave measurements acquired in tomographic systems  ...  The main advantage of this methodology is that there is little or no need for a priori information about the object to be imaged.  ...  A monostatic or quasi-monostatic setup is considered, so that the transmitting and receiving antennas are placed at (r,ϕ).  ... 
doi:10.3390/electronics7120373 fatcat:sb5pvjtq5fbnhkhjpy2v5zzrqm

An imaging algorithm of objects embedded in a lossy-dispersive medium for subsurface radar-data processing

T. Sato, T. Wakayama, K. Takemura
2000 IEEE Transactions on Geoscience and Remote Sensing  
A robust and high-resolution 2-D imaging algorithm is proposed for retrieving the shape of conductive objects embedded in a uniform lossy and dispersive medium.  ...  A nonlinear least squares fitting is applied to the estimated scattered waveform to adjust the model parameters.  ...  Introduction I N subsurface radar applications, it is often experienced that the requirements for the resolution and the penetration depth contradict each other.  ... 
doi:10.1109/36.823922 fatcat:yrgcpkrwgbckzgcpkco4v426ry

A C-Band Fully Polarimetric Automotive Synthetic Aperture Radar [article]

Jason Merlo, Jeffrey A. Nanzer
2021 arXiv   pre-print
In this work, we present a low frequency 5.9 GHz side-looking polarimetric synthetic aperture radar (SAR) for automotive use, utilizing a ranging waveform in a common low frequency V2X communications band  ...  A synthetic aperture technique is employed to address the angular resolution concerns commonly associated with radars at lower frequencies.  ...  A quasi-monostatic approximation is used meaning the TX and RX beams are assumed to be colocated as shown in the figure.  ... 
arXiv:2110.14114v2 fatcat:nighg36f7nedrfcmqewbaqajgm

Bistatic Landmine and IED Detection Combining Vehicle and Drone Mounted GPR Sensors

Maria Garcia-Fernandez, Ann Morgenthaler, Yuri Alvarez-Lopez, Fernando Las Heras, Carey Rappaport
2019 Remote Sensing  
This work proposes a novel Ground Penetrating Radar (GPR) system to detect landmines and Improvised Explosive Devices (IEDs).  ...  This combination offers both a good penetration and a high resolution, enabling the detection of non-metallic targets and mitigating the clutter at the air–soil interface.  ...  It must also be noticed that, although bistatic SAR systems have gained an increasing interest in the last years [8] , most GPR systems (both DLGPR and FLGPR) adopt a monostatic or a quasi-monostatic  ... 
doi:10.3390/rs11192299 fatcat:dioelu6i2ngnbh4me6o5tqd3am

Improved Resolution and Reduced Clutter in Ultra-Wideband Microwave Imaging Using Cross-Correlated Back Projection: Experimental and Numerical Results

S. Jacobsen, Y. Birkelund
2010 International Journal of Biomedical Imaging  
Supplementary numerical modeling based on commercial software is also presented. The phantom is synthetically scanned with a broadband elliptical antenna in a mono-static configuration.  ...  This radar-based imaging method involves illumination of the breast with an ultra-wideband pulse. Detection of tumors within the breast is achieved by some selected focusing technique.  ...  Conclusion We have presented an experimental characterization, supplemented by numerical modeling, of a monostatic radar-based system for breast cancer detection.  ... 
doi:10.1155/2010/781095 pmid:21331362 pmcid:PMC3035806 fatcat:kdslxcxphng2bfwqrk3tx7p6ra

Clutter removal of near-field UWB SAR imaging for pipeline penetrating radar

Alireza Akbarpour, Somayyeh Chamaani, Jurgen Sachs, Giovanni DelGaldo
2020 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
Recently, ultrawideband (UWB) near-field synthetic aperture radar (SAR) imaging has been proposed for pipeline penetrating radar applications thanks to its capability in providing suitable resolution and  ...  Therefore, to mitigate this issue, we propose "modified 2-D SSA." After developing the suitable clutter removal algorithm, we propose a complete algorithm chain for pipeline imaging.  ...  Several clutter reduction techniques have been applied for ground penetrating radar (GPR), through wall imaging (TWI), and near-field imaging in the literature [15] , [16] - [25] .  ... 
doi:10.1109/jstars.2020.2983891 fatcat:vtps36lu35fd5gu4xaogrz7smu

Terahertz imaging of subjects with concealed weapons

Jason C. Dickinson, Thomas M. Goyette, Andrew J. Gatesman, Cecil S. Joseph, Zachary G. Root, Robert H. Giles, Jerry Waldman, William E. Nixon, Dwight L. Woolard, R. Jennifer Hwu, Mark J. Rosker, James O. Jensen
2006 Terahertz for Military and Security Applications IV  
The existing 1.56THz compact radar range was modified to project a focused illumination spot on the target subject several meters away, and receive the back-reflected intensity.  ...  Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently  ...  Army National Ground Intelligence Center (NGIC) under the ERADS program. Currently STL and NGIC have six compact radar ranges operating at frequencies up to 1.6 terahertz.  ... 
doi:10.1117/12.667998 fatcat:4ax4ubhuwrgibla7suxuf353zi
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