Download or read book An approach to ground moving target indication using multiple resolutions of multilook synthetic aperture radar images written by Geoffrey A. Akers and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detection of Ground Moving Objects with Synthetic Aperture Radar written by Ishuwa C. Sikaneta and published by . This book was released on 2004 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multi Dimensional Imaging with Synthetic Aperture Radar written by Gianfranco Fornaro and published by Elsevier. This book was released on 2024-02-12 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-Dimensional Imaging with Synthetic Aperture Radar: Theory and Applications provides a complete description of principles, models and data processing methods, giving an introduction to the theory that underlies recent applications such as topographic mapping and natural risk situational awareness – seismic-tectonics, active volcano, landslides and subsidence monitoring - security, urban, wide area and infrastructure control. Imaging radars, specifically Synthetic Aperture Radar (SAR), generally mounted onboard satellites or airplanes, are able to provide systematic high-resolution imaging of the Earth's surface. Recent advances in the field has seen applications to natural risk monitoring and security and has driven the development of many operational systems. Explains the modeling and data processing involved in interferometric and tomographic SAR Shows the potential and limitations of using SAR technology in several applications Presents the link between basic signal processing concepts and state-of-the-art capabilities in imaging radars Explains the use of basic SAR processing tools and datasets
Download or read book Ground Moving Target Indication with Millimeter Wave Synthetic Aperture Radar written by Maurice Rüegg and published by . This book was released on 2007 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Approaches to Ground Moving Target Indicator Radar written by Michael Richard Riedl and published by . This book was released on 2016 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing the resolution of radar imaging and ground moving target indicator (GMTI) systems puts a stress on both hardware and processing limitations. Hardware must be able to handle the transfer of the large amounts of data generated. Additionally, the processing must be robust to any heterogeneity of the data that is introduced by collecting returns from large swaths. This dissertation presents system architectures and knowledge-aided processing techniques to combat the large data rates and data heterogeneity. Ground moving target indicator radar techniques for airborne platforms require spatial and Doppler signal diversity for separating the returns of moving targets from the returns of ground clutter. The traditional use of multiple receive antennas for jointly imaging a scene and detecting moving objects is prohibited by the system bottleneck at the data down-link. We present a frequency division multiple access, multiple-transmit single-receive radar architecture, with associated waveform design and data processing procedure. The proposed approach is demonstrated to jointly provide imaging and GMTI modalities while maintaining the data rate to that of a single antenna imaging system. Heterogeneity of the radar backscatter data degrades detection performance by biasing statistical parameters estimated from the data. A GMTI processing technique, known as space-time adaptive processing (STAP), requires estimation of the space-time covariance of the clutter for use in a generalized likelihood ratio test. Consequently, the performance of STAP is related to the quality of the estimated clutter covariance matrix; however, in practice it is common for the data to be limited, contaminated, and heterogeneous. In this dissertation, we introduce and evaluate two estimators for the clutter covariance and a purely Bayesian detection scheme. A Bayesian model is postulated for the angle/Doppler scene to incorporate approximate prior knowledge of the terrain height and the platform kinematics. Posterior probabilities computed using the model are then used to either estimate a covariance matrix or directly report posterior probabilities of the presence of a target. The approach is a novel means for incorporating operational knowledge into GMTI processing and admits low-complexity algorithmic implementation via recent advances in Bayesian message passing algorithms. In the second covariance estimator, a regularized shrinkage approach is proposed, whereby prior knowledge is expressed through an elastic net regularization penalty on a minimum expected squared error estimation cost. The regularized shrinkage estimator is shown to coincide with a minimax robust covariance estimator and offers simplicity in modeling and computation that may facilitate use by practitioners. In the third approach, the Bayesian model is augmented to jointly estimate calibration parameters for unknown antenna phases and detect moving targets. The performances of the proposed estimators and detectors are evaluated using the KASSPER I dataset. We conclude that the proposed approaches extend the state-of-the-art to provide reliable detection performance when the training data is limited to a number of range bins less than the rank of the true covariance matrix. Further, when presented no training data, the Bayesian approach is shown to maintain performance using only the data under test. Finally, the purely Bayesian detection approach, when combined with antenna calibration, is observed to provide enhanced resolution, allowing reliable detection of multiple targets within a single range bin not achievable with traditional STAP.
Download or read book Imaging with Synthetic Aperture Radar written by Didier Massonnet and published by CRC Press. This book was released on 2008-05-01 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing a field that has been transformed by the recent availability of data from a new generation of space and airborne systems, the authors offer a synthetic geometrical approach to the description of synthetic aperture radar, one that addresses physicists, radar specialists, as well as experts in image processing.
Download or read book Sub Nyquist Synthetic Aperture Radar Imaging and Ground Moving Target Indication written by Abdulmalik Aldharrab and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Along Track Interferometry Synthetic Aperture Radar ATI SAR Techniques for Ground Moving Target Detection written by and published by . This book was released on 2006 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional along track interferometric synthetic aperture radar, ATI-SAR, approaches can detect targets with very low radial speeds, but their false alarm rate is too high to be used in ground moving target indication radars. The report proposed a dual-threshold approach that combines the conventional interferometric phase detection and the SAR image amplitude detection in order to reduce the false alarm rate. The concept and performance of the dual-threshold approach were illustrated using the Jet Propulsion Laboratory AirSAR ATI data. A simple two-dimensional blind calibration procedure was proposed to correct the group phase shift induced by the platform's crab angle. MATLAB programs for demonstrating the proposed approach were included.
Download or read book The GEC Journal of Research written by and published by . This book was released on 1987 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Multiple Aperture Feed System for Ground Moving Target Indication GMTI Radar Applications written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Passive Synthetic Aperture Radar Imaging of Ground Moving Targets written by Steven Wacks and published by . This book was released on 2014 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Research Into Moving Target Imaging Using Multistatic Radar written by and published by . This book was released on 2009 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current active imaging algorithms for moving targets suffer from issues of incorrect positions (spatial) and streaking artifacts (temporal). Using the Cheney/Borden procedure, we investigated combining the spatial, temporal, and spectral aspects of real and synthetic aperture radar images. We code the Cheney/Borden algorithm to include the target velocity, include an appropriate threshold, and illustrate how multistatic radar can determine a target's location in phase space. By running simulations on single and multiple moving targets, we showed that an iteration of velocity and position choices for targets enhanced the correlation map for multistatic radar systems.
Download or read book Moving Target Detection and Motion Estimation in Foliage Using Along Track Monopulse Synthetic Aperture Radar Imaging written by Mehrdad Soumekh and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthetic Aperture Radar Signal and Image Processing for Moving Target Indication and Side Lobe Suppression written by and published by . This book was released on 2012 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moving Target Focusing Geolocation and Ambiguity Resolution Using Single channel Synthetic Aperture Radar written by Matthew E. Holston (CAPT, USAF.) and published by . This book was released on 2007 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fast Target Tracking Technique for Synthetic Aperture Radars written by Kyle J. Kauffman and published by . This book was released on 2009 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern radar imaging requires advanced Synthetic Aperture Radar (SAR) techniques in order to compensate for the low resolution typically found on airborne radars. However, the techniques used to process the data collected during SAR operation require a great deal of computation. This paper proposes a novel efficient algorithm and approach to processing the data collected to quickly get high-resolution approximations for the locations of non-moving targets.
Download or read book Synthetic Aperture Radar Moving Target Focusing and Geolocation Using Moving Reference Processing written by Christopher D. Lemanski (MAJ, USAF.) and published by . This book was released on 2006 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
