Cross-polarized Radar Processing PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 322
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Book Description
This study examines the feasibility of developing an improved and affordable ice navigation radar that would be able to distinguish between hazardous and non-hazardous ice using non-coherent, cross-polarized radar processing. Two key issues were investigated: whether useful polarimetric information could be retained and exploited when using uncalibrated radars for polarimetric processing, and the use of non-specialized, non-collocated radars to provide the polarimetric information. In studying the first issue, data sets selected from field trials were analyzed to develop the required techniques so that meaningful ratios between the like- and cross-polarized returns could be obtained. Multi- year (hazardous) ice features were identified by experts and polarimetric algorithms developed in the study were tested on these images to determine their ability to discriminate between hazardous and non-hazardous ice features. The second issue arises because specialized cross-polarized radar antennas are expensive; an alternative is the use of two conventional (horizontally polarized) marine radars and alter the polarization of the second to provide vertical polarization. The second radar would be set to receive-only and synchronized to the first transmitting radar in rotation, frequency, and pulse timing. The study reviewed the literature on the use of polarizer lenses to alter the antenna polarization and also derived synchronization and timing requirements for slaving the second radar to the first.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 322
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Book Description
This study examines the feasibility of developing an improved and affordable ice navigation radar that would be able to distinguish between hazardous and non-hazardous ice using non-coherent, cross-polarized radar processing. Two key issues were investigated: whether useful polarimetric information could be retained and exploited when using uncalibrated radars for polarimetric processing, and the use of non-specialized, non-collocated radars to provide the polarimetric information. In studying the first issue, data sets selected from field trials were analyzed to develop the required techniques so that meaningful ratios between the like- and cross-polarized returns could be obtained. Multi- year (hazardous) ice features were identified by experts and polarimetric algorithms developed in the study were tested on these images to determine their ability to discriminate between hazardous and non-hazardous ice features. The second issue arises because specialized cross-polarized radar antennas are expensive; an alternative is the use of two conventional (horizontally polarized) marine radars and alter the polarization of the second to provide vertical polarization. The second radar would be set to receive-only and synchronized to the first transmitting radar in rotation, frequency, and pulse timing. The study reviewed the literature on the use of polarizer lenses to alter the antenna polarization and also derived synchronization and timing requirements for slaving the second radar to the first.
Author: Transportation Development Centre (Canada)
Publisher:
ISBN:
Category : Ice navigation
Languages : en
Pages :
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Book Description
Author: Huanyao Dai
Publisher: Springer
ISBN: 9811087946
Category : Technology & Engineering
Languages : en
Pages : 331
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Book Description
This book presents novel research ideas and offers insights into radar system design, artificial intelligence and signal processing applications. Further, it proposes a new concept of antenna spatial polarization characteristics (SPC), suggesting that the antenna polarization is a function of the spatial direction and providing new ideas for radar signal processing (RSP) and anti-jamming. It also discusses the design of an advanced signal-processing algorithm, and proposes new polarimetric and anti-jamming methods using antenna inherent properties. The book helps readers discover the potential of radar information processing and improve its anti-interference and target identification ability. It is of interest to university researchers, radar engineers and graduate students in computer science and electronics who wish to learn the core principles, methods, algorithms, and applications of RSP.
Author: Nikolay Kondratyevich Yurkov
Publisher: Springer Nature
ISBN: 9813349646
Category : Technology & Engineering
Languages : en
Pages : 140
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Book Description
This book highlights the synthesis of polarization selection system in the background of passive noise formed by reflections from space-distributed targets. This synthesis is fulfilled as close as possible to its ideal configuration in terms of maximal signal-to-noise ratio for the matched load of radar station antenna system. It presents a new approach to radar system resolution enhancement based on the development of mathematical model for radiometric receivers with mono-pulse antenna systems, as well as creation of a new algorithm that allows increasing angular resolution during the object’s search and tracking due to special signal processing.
Author: V. Chandrasekar
Publisher: Cambridge University Press
ISBN: 1009234285
Category : Science
Languages : en
Pages : 522
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Book Description
An interdisciplinary and easy-to-understand introduction to the subject, covering fundamental theory and practical applications, and using numerous operational examples. This balanced text will allow you to begin from what the radar observes and move deeper through electromagnetic scattering theory and cloud microphysics to understand and interpret data as it appears on the display. It uses illustrations and figures of real radar observations to convey concepts and theory of atmospheric processes typically observed with weather radar, as well presenting a working knowledge of the radar system itself. In addition to covering fundamentals of scattering and atmospheric physics, topics include system hardware, signal processing, and radar networks. This is the perfect tool for scientists and engineers working on weather radars or using radars and their data, as well as senior undergraduate and graduate students studying weather radars.
Author: Gerard Masalias Huguet
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Dual-polarized phased-array radars used for weather retrieval purposes is an emerging tendency over the last few years. The dual-polarization technology provides an expanded range of weather products and the reliability of these polarimetric products rely on the beam shape quality of the system under use and its polarization isolation. This thesis presents the calibration process of a one-dimensional scanning phased-array radar to assure its beamforming quality. A cross-polarization cancellation technique, with no additional hardware requirements, is tested and appeared to optimize the array settings for an improved isolation and therefore, for a better data quality.
Author: Eugene F. Knott
Publisher: Springer Science & Business Media
ISBN: 1468499041
Category : Science
Languages : en
Pages : 557
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Book Description
The original campus of the University of Michigan was nearly a perfect square about a half-mile along a side. A street-sized walk, appropriately called the Diag, runs diagonally across this square, connecting its southeast and northwest corners. In 1904 a new engineering building was either started or finished (I do not remember which) to house classrooms. When another engineering building was built on the expanded campus across the street from it many years later, the old building came to be known as West Engine, to distinguish it from the new East Engine. Old West Engine is (or maybe by now, was) a four-story, L-shaped structure that stood at the southeast corner of the original campus. It was built with an arch in it to straddle the Diag at the apex of the L. You walked over the Engineering Arch to get from one leg of the L to the other if you were inside the building, and you walked under it when you entered the campus from the southeast corner. Affixed to the masonry wall of the arch was a plaque I often noted in passing. It bore a quote attributed to Horace Greeley (1811-1872), who I did not know at the time was the founder, editor, and publisher of the New York Tribune. It said, simply, Young man, when theory and practice differ, use your horse sense. The suggestion seems worthy of an exclamation point instead of a period, but I do not remember if it had one.
Author: Jong-Sen Lee
Publisher: CRC Press
ISBN: 135183522X
Category : Technology & Engineering
Languages : en
Pages : 474
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Book Description
The recent launches of three fully polarimetric synthetic aperture radar (PolSAR) satellites have shown that polarimetric radar imaging can provide abundant data on the Earth’s environment, such as biomass and forest height estimation, snow cover mapping, glacier monitoring, and damage assessment. Written by two of the most recognized leaders in this field, Polarimetric Radar Imaging: From Basics to Applications presents polarimetric radar imaging and processing techniques and shows how to develop remote sensing applications using PolSAR imaging radar. The book provides a substantial and balanced introduction to the basic theory and advanced concepts of polarimetric scattering mechanisms, speckle statistics and speckle filtering, polarimetric information analysis and extraction techniques, and applications typical to radar polarimetric remote sensing. It explains the importance of wave polarization theory and the speckle phenomenon in the information retrieval problem of microwave imaging and inverse scattering. The authors demonstrate how to devise intelligent information extraction algorithms for remote sensing applications. They also describe more advanced polarimetric analysis techniques for polarimetric target decompositions, polarization orientation effects, polarimetric scattering modeling, speckle filtering, terrain and forest classification, manmade target analysis, and PolSAR interferometry. With sample PolSAR data sets and software available for download, this self-contained, hands-on book encourages you to analyze space-borne and airborne PolSAR and polarimetric interferometric SAR (Pol-InSAR) data and then develop applications using this data.
Author: W.M Boerner
Publisher: Springer Science & Business Media
ISBN: 9401092435
Category : Technology & Engineering
Languages : en
Pages : 1076
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Book Description
This foreword deals exclusively with the planning, organization, and execution of the Workshop's scientific as well as cultural programs. It is opened with a synopsis on how the global political changes that occurred immediately after the Workshop caused the ~elay in producing the proceedings, followed by a brief exposition on need, timeliness, and importance of this second ARW in the field of electromagnetic imaging, radar remote sensing, and target versus clutter di~rimination; and an outline of the objectives. An informal discussion about some of the organizational details, a retrospective summary of events, and a preview of the third workshop, planned for 1993 September 19-25, is intended to recapture the spirit of this second NATO Advanced Research Workshop (1988 September 18-24), and will reveal how successful it was in compar ison to the first of 1983 September 18-24, how its accomplishments may be appreciated and why a third and last workshop was requested by its participants to take place during 1993 September 19-25.
Author: D. L. Moffatt
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 38
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Book Description
This report summarizes research during the period July 1, 1974 to June 30, 1975 under the contract on two technical objectives of the Air Force: improved detection and discrimination of radar targets and reduction of nonspecular scattering by wing geometries. The report is contained in two main sections. The first section outlines methods for deducing the complex natural resonances of arbitrary radar targets and the use of these resonances via predictor-correlator processing for detection and discrimination. Illustrative examples of both natural resonance extraction and discrimination are given for aircraft targets. The second section of the report summarizes the analysis of a loaded two-dimensional wind model for horizontal polarization. Hybrid techniques combining moment methods and the geometrical theory of diffraction are used and the loading consists of surface impedance patches. Examples of reduction of the nonspecular cross section are given. A 'folded dipole' like antenna is used as an alternate mechanism for controlling edge diffracted fields.
