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检索条件"任意字段=Conference on Radar Sensor Technology and Data Visualization"

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Payload technologies and applications for uninhabited air vehicles (UAVs)

Payload technologies and applications for uninhabited air ve...

引用

IEEE conference on Aerospace

作者： J.M. Borky BDM Federal Inc. Albuquerque NM USA

After more than 50 years of limited niche applications in such roles as aerial targets, UAVs have recently emerged as major aerospace platforms for both military and civilian uses. This is due to three fundamental breakthroughs: (1) UAVs have begun to achieve reliability levels which allow routine operational use, (2) payload technologies have matured to the point where extremely useful functions can be accommodated within the weight, volume and power constraints of small airplanes, and (3) evidence is mounting that UAVs can do many tasks better and more affordably than manned aircraft. In many ways, UAVs compete with space systems for equivalent functions, often with the advantage of persistence over an area of interest at far closer range than a geostationary satellite. This paper surveys some of the major electronics developments which contribute to this resurgence. Among the topics covered are UAV architectures; imaging sensors, including synthetic aperture radar (SAR) and infrared/electro-optical (IR/EO) cameras; communications and data link systems; specialized sensors for such things as chemical detection and RF spectrum surveillance; and onboard processing. In all of these, recent system designs demonstrate levels of performance, e.g., SAR resolution and image processing time, comparable to or better than those achievable a few years ago only in systems costing one to two orders of magnitude more. The ways in which these payloads support military missions such as surveillance and commercial operations such as communications relay and earth resources sensing are reviewed. Finally, some projections are presented about important trends in both payload technologies and system applications.

关键词： Payloads Infrared image sensors Chemical sensors Unmanned aerial vehicles Space technology Aerospace electronics sensor systems Infrared detectors Surveillance Military aircraft

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Position estimation from netted radar systems with sensor position uncertainty

Position estimation from netted radar systems with sensor po...

引用

1996 CIE International conference of radar (CICR-96)

作者： Paradowski, L Military Univ of Technology Warsaw Poland

ISBN: (纸本)7505339036

The paper presents concrete algorithm elaborated to estimate object position in three-dimensional space using data obtained from netted monostatic radars with sensor position uncertainty. An influence of this uncertainty caused by navigation or geodetic errors of radar position determination on object position location accuracy has been examined for short and long range radar systems. Selected computational results have been presented and compared with results obtained under classical assumptions that sensor position determination errors do not exist.

关键词： radar systems

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Fusion of optical, infrared and radar imagery for coastal surveillance.

Fusion of optical, infrared and radar imagery for coastal su...

引用

22nd Infrared technology and Applications conference

作者： Dutkiewicz, M Davenport, M Rey, M Boulter, JF Blanchard, A MACDONALD DETTWILER RICHMONDBC V6V 2J3CANADA

ISBN: (纸本)0819421251

Imaging instruments such as optical, infrared and radar sensors can provide valuable input for monitoring coastal waters. We show how the data obtained from these three sensor types can be useful for coastal surveillance, in particular for ship detection and identification. The paper addresses various aspects of the data fusion process as applied to these sensors, including data alignment, target detection, and target feature (attribute) extraction for target identification.

关键词： multisensor data fusion coastal surveillance optical infrared hyperspectral radar synthetic aperture radar

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Low-frequency ultra-wideband synthetic aperture radar: Frequency subbanding for targets obscured by the ground

Low-frequency ultra-wideband synthetic aperture radar: Frequ...

引用

conference on radar sensor technology

作者： Happ, L Le, F Ressler, M Kappra, K USA RES LABMICROWAVE SENSORS BRANCHADELPHIMD 20783

ISBN: (纸本)0819421286

The Army Research Laboratory (ARL) has been investigating the potential of ultra-wideband synthetic aperture radar (UWB SAR) technology to detect and classify targets concealed by subsurface targets and foliage. Our investigative approach is to collect high-quality precision data to support phenomenological investigations of electromagnetic wave propagation through dielectric media. These investigations, in turn, support the development of algorithms for automatic target recognition. In order to achieve these goals, ARL designed and built an impulse (very short pulse) radar to collect data at a variety of test sites to measure and analyze the responses from targets, clutter, and targets embedded in clutter. The UWB BoomSAR, mounted on a 150-foot-high mobile boom lift, collects the high-quality, precision data sets needed for understanding UWB SAR system requirements and foliage penetration and ground penetration phenomenology. The BoomSAR operates with over 1 gigahertz of bandwidth covering a spectrum from 40 MHz to 1 GHz and is fully polarimetric. This bandwidth contains low frequencies needed for ground penetration while also maintaining higher frequency coverage for high resolution imagery. This paper shows a GPEN target area from data collected at Yuma Proving Grounds, AZ in low- and high- frequency subbands.

关键词： low frequency synthetic aperture radar ground penetration radar mine detection

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data fusion concepts applied to a suite of dissimilar sensors

Data fusion concepts applied to a suite of dissimilar sensor...

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1996 Canadian conference on Electrical and Computer Engineering - Glimpse into the 21st-Century

作者： Bosse, E Roy, J Grenier, D DEF RES ESTAB VALCARTIER DECIS SUPPORT SECTCOURCELETTEPQ G0A 1R0CANADA

ISBN: (纸本)0780331435

This paper presents a discussion on the feasibility and usefulness of data fusion applied to a suite of dissimilar sensors. This suite comprises surveillance radar, forward looking infrared (FLIR), electronic support measurement (ESM), a synthetic aperture radar (SAR), acoustic sensors and a data link (LINK 11). An analysis of applicable sensor fusion processes is presented followed by a discussion on the expected performance improvements. Finally, a three step incremental approach is proposed with recoverable steps where different level of fusion sophistication can be implemented based on the availability of the technology and the actual status of the sensors.

关键词： sensor data fusion

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Sequential Fusion Filter of Dissimilar sensor data Based on IAC Algorithm

Sequential Fusion Filter of Dissimilar Sensor Data Based on ...

引用

1996 3rd International conference on Signal Processing(ICSP’96)

作者： Wang Yueyong Yang Weiqin Ge Xiyuan Department of Automatic Control Beijing Institute of Technology P.R.China College of Electronic and Automatic Engn Beijing Union University P.R.China

ISBN: (纸本)7505338900

Supposing that there are two dissimilar sensor(e.g. radar and infrared detector ),a Multi-sensor data Sequential Fusion Filter(MSDSFF ) has been proposed. For maneuvering target tracking,Interactive Acceleration Compensation(IAC ) algorithm has been introduced into the MSDSFF(IAC/MSDSFF ).Considered the performance and the computational requirement, IAC/MSDSFF is an effective approach

关键词： Fusion sensor Sequential Fusion Filter of Dissimilar sensor data Based on IAC Algorithm Filter IAC

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Development of VHF CARABAS II SAR

Development of VHF CARABAS II SAR

引用

conference on radar sensor technology

作者： Hellsten, H Ulander, LMH Gustavsson, A Larsson, B NATL DEF RES ESTAB S-58111 LINKOPINGSWEDEN

ISBN: (纸本)0819421286

There is an increasing interest in imaging radar systems operating at low frequencies. Examples of military and civilian applications are detection of stealth-designed man- made objects, targets hidden under foliage, biomass estimation, and penetration into glaciers or ground. The developed CARABAS technology is a contribution to this field of low frequency SAR imagery. The used wavelengths offer a potential of penetration below the upper scattering layer in combination with high spatial resolution. The first prototype of the system (CARABAS I) has been tested in environments ranging from rain forests to deserts, collecting a considerably amount of data often in parallel with other SAR sensors. The work on data analysis proceeds and results obtained so far seem promising, especially for application in forested regions. The experiences gained are used in the development of a new upgraded system (CARABAS II), which is near completion and initial airborne radar tests for system verifications followed by some major field campaign are scheduled to take place during 1996. This paper will summarize the CARABAS I system characteristics and system performance evaluation. The major imperfections discovered in the radar functioning will be identified, and we explain some of the modification made in the system design for CARABAS II. A new algorithm for future real-time CARABAS data processing has been derived, with a structure well-suited for a multi-processor environment. Motion compensation and radio frequency interference mitigation are both included in this scheme. Some comments on low frequency SAR operation at UHF-based versus VHF-band will be given.

关键词： VHF radar low frequency SAR ultra-wideband foliage penetration ground penetration wideband dipole backprojection radio frequency interference stealth countermeasures

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Automatic target recognition system using high resolution radar

Automatic target recognition system using high resolution ra...

引用

conference on radar Processing, technology, and Applications

作者： Jacobs, SP OSullivan, JA Faisal, M Snyder, DL Washington Univ. (United States)

ISBN: (纸本)0819422339

A system is proposed for joint tracking and recognition of airborne targets from the observations of radar sensors. It is assumed that the data available for the estimation of target orientation and recognition include sequences of range-profiles from a high resolution radar. Inference is performed using the posterior distribution on the complete parameter space, which includes the number of targets as well as their positions, orientations, and target types. The algorithm is critically dependent on appropriate sensor and target models, in the form of a likelihood for the range profiles given the target orientations, and a prior on the orientations determined by the target dynamics. Deterministic and stochastic models for high resolution radar data are presented, and the likelihood function under the deterministic model is examined. The viability of our approach is demonstrated through simulations that address two simplified recognition scenarios. The first simulation investigates joint tracking and recognition of a single maneuvering target from the simulated observations of both a cross-array tracking radar and a high resolution radar. In the second simulation, orientation estimation and recognition are performed for a single target which is approaching an airborne radar platform. Results from these simulations showing performance are given.

关键词： automatic target recognition high resolution radar orientation estimation range profiles joint tracking and recognition xpatch

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radar remote sensing potential for Southern Africa

Radar remote sensing potential for Southern Africa

引用

Proceedings of the 1996 4th IEEE AFRICON conference. Part 1 (of 2)

作者： Inggs, M.R. Univ of Cape Town Rondebosch South Africa

This paper introduces the field of remote sensing using radar and explains some of the ways in which this relatively new technology can be applied to the development of Southern Africa. Active and passive radar sensors are discussed. The need for remote sensing user training in radar techniques is stressed, as well as the need for a local airborne sensor. The difference between airborne and satellite sensors is discussed. An update of radar remote sensing activities in southern Africa is given. The existing large body of satellite data is mentioned as a good starting point for environmental applications. References have been selected to provide an entry to the large body of published literature on radar remote sensing applications.

关键词： Remote sensing

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Daimler-Benz Aerospace/Dornier SAR interferometric sensing system: Experimental study

Daimler-Benz Aerospace/Dornier SAR interferometric sensing s...

引用

conference on Laser radar technology and Applications

作者： Faller, NP Fritsch, B Meier, EH Sieber, AJ DAIMLER BENZ AEROSP DORNIERGERMANY

ISBN: (纸本)0819421294

The DO-SAR system consists of an airborne SAR sensor unit and ground-based image processing equipment. It has been built in the late eighties. In order to study algorithms, there was the need to generate dual frequency multipolarization data simultaneously. The DO-SAR images allow a comparison on a pixel by pixel basis. The system has been enhanced to along track and across track interferometry. The across track modes are used to generate height profiles with high accuracy. The along track interferometry can be used to estimate the velocity of targets on ground and the velocity of the aircraft. The system has been operating since 1989. It has been used overall in Europe for maritime and oceanic missions. It was used to fly over flooded areas and it provides simultaneous images together with SIRC, in Denmark and Germany. Presently, it is used to generate interferometric single path images in tropic areas in order to classify the tropical forests.

关键词： Interferometry Antennas Synthetic aperture radar sensors Image processing Global Positioning System Calibration data storage Reflectors Sensing systems

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