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

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sensor integration in airborne mapping

Sensor integration in airborne mapping

引用

IEEE Instrumentation and Measurement technology conference

作者： C.K. Toth The Center for Mapping Ohio State Uinversity Columbus OH USA

ISBN: (纸本)0780366468

The rapid technological developments of the 90s have completely redefined the mapping practice. In less than a decade, digital techniques have come to outnumber traditional analog data acquisition and processing methods. Supported by unprecedented demand for large-volume, accurate spatial data, these new digital techniques emerged as dominant mapping technologies by the end of the decade. Two key components of this emerging technology are the electronic sensor-based digital camera and GPS/INS-based direct platform orientation. In fact, these new platform orientation systems are rapidly becoming a core component of modern airborne mapping and remote sensing systems.

关键词： Global Positioning System Calibration Digital cameras Laser radar data acquisition Charge coupled devices Image sensors sensor systems Control systems Hyperspectral sensors

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Interactive exploration of the underwater sonar space

Interactive exploration of the underwater sonar space

引用

OCEANS

作者： L.M. Encarnacao R.J. Barton D. Zeltzer Fraunhofer CRCG Inc. Providence RI USA

Today, the US Navy's submarine fleet is equipped with a multitude of advanced, highly capable acoustic sensors and systems that are utilized in many aspects of tactical, navigational, and operational command and control (C2). These modern sonar systems collect, process, store, disseminate, and display sensor data. It is the real-time operational understanding of this collective sensor data that we term sensorspace awareness. Rapid advances in processing techniques, computing power, and sensor technology present a new challenge - sonar operators require extensive training and experience in order to deal with an enormous amount of acoustic data using limited 2D display and interaction tools - nearly unchanged in the past 25 years. Fraunhofer CRCG and the Naval Undersea Warfare Center present a highly interactive Large Scale visualization Environment (LSVE) for performing the essential tasks of detection and classification of sonar contacts. Our prototype application employs a semi-immersive 3D display system, multiple and mixed modalities of interaction and feedback, and state-of-the-art volumetric visualization and abstraction techniques. The described use-case includes simulated passive sonar data from an advanced towed array system, chosen for both the amount and high degree of dimensionality typical of the data produced. In our scenario, an operator uses the LSVE to rapidly detect a contact in a low signal to noise environment and performs the task of classification. This paper describes the application scenario, approach and implementation of the LSVE and concludes with experiences, lessons learned, and future directions from both the interactive large-scale visualization as well as an application point of view.

关键词： Sonar navigation Acoustic sensors Command and control systems Large-scale systems data visualization Sonar detection Underwater vehicles sensor systems Computer displays Military computing

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Track maintenance and positional estimation via ground moving target indicator and geolocation data fusion

Track maintenance and positional estimation via ground movin...

引用

IEEE National conference on radar

作者： K. McDonald W.S. Kuklinski Sensors and Enabling Technology Division-Signal Processing Department MITRE Corporation Bedford MA USA

ISBN: (纸本)0780367073

In modern tactical environments, information from a variety of sensors may be simultaneously utilized to improve target detection and tracking procedures. Towards this goal, two data fusion algorithms are developed that implement such processing. First, a GMTI (ground moving target indicator)/geolocation algorithm is derived to assist with track maintenance during periods of GMTI data blackout. Next, a geolocation estimator is presented which fuses time difference of arrival (TDOA), frequency difference of arrival (FDOA), and angle of arrival (AOA) measurements. These algorithms lead to improved positional estimation, track accuracy, and track maintenance. They also potentially reduce the number of platforms required to successfully locate and track targets.

关键词： Target tracking radar tracking Signal processing algorithms sensor fusion Frequency estimation Time difference of arrival Frequency measurement Time measurement Doppler radar Object detection

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The 94-GHz cloud profiling radar for the CloudSat mission

The 94-GHz cloud profiling radar for the CloudSat mission

引用

IEEE conference on Aerospace

作者： E. Im S.L. Durden Chialin Wu T.R. Livermore Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA

ISBN: (纸本)0780365992

The CloudSat Mission is a new international satellite mission to acquire a global data set of vertical atmospheric cloud structure and its variability. Such data set is expected to provide crucial input to the studies of cloud physics, radiation budget, water distribution in the atmosphere, and to the numerical weather prediction models. The key science instrument aboard the CloudSat satellite is the Cloud Profiling radar (CPR). CPR is a 94-GHz nadir-looking radar that measures the power backscattered by clouds as a function of distance from the radar. This sensor is expected to provide cloud measurements at a 500-m vertical resolution and a 1.5-km horizontal resolution. CPR will operate in a short-pulse mode and will yield measurements at a minimum detectable sensitivity of -28 dBZ. In this paper, we will present the system design and the expected performance of this instrument, as well as the state-of-the art millimeter-wave technologies employed by this instrument.

关键词： Clouds Spaceborne radar Instruments Satellites radar measurements Atmospheric measurements Physics Atmosphere Weather forecasting Atmospheric modeling

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Case-based retrieval method by multiple sensor data for lightning flash

Case-based retrieval method by multiple sensor data for ligh...

引用

IEEE International conference on Systems, Man and Cybernetics

作者： W. Kise M. Ito A. Mitsuishi Y. Kosuge F. Asano S. Watanabe Information Technology Research and Development Center Mitsubishi Electric Corporation Limited Kamakura Kanagawa Japan Communication Systems Center Mitsubishi Electric Corporation Limited Amagasaki Hyogo Japan Kamakura Works Mitsubishi Electric Corporation Limited Kamakura Kanagawa Japan

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SIREV- Sector Imaging radar for Enhanced Vision

SIREV- Sector Imaging Radar for Enhanced Vision

引用

International Symposium on Image and Signal Processing and Analysis

作者： G. Krieger J. Mittermayer M. Wendler F. Witte A. Moreira Deutsches Zentrum fur Luft-und Raumfahrt DLR e. V Institut fur Hochfrequenztechnik und RadarSysteme Wessling Germany

ISBN: (纸本)9539676940

SIREV (Sector Imaging radar for Enhanced Vision) is an innovative radar system which can supply high-quality images of a sector in front of an aircraft under almost all weather conditions. In contrast to synthetic aperture radar (SAR) systems, no relative motion between sensor and targets is required in SIREV. The high frame repetition frequency in SIREV allows us to detect even very rapid changes in the imaged scenes. Besides a map of the Earth's surface, the complex-valued radar images can be further processed to supply additional information about the topography and objects in the field of view. A fast processing algorithm has been developed for SIREV which allows a very accurate, phase-preserving and efficient image formation. Raw data were obtained by a first demonstration flight using a helicopter, as a platform and the data processing results show good agreement with the theory. Motion errors of the platform could be extracted from the range compressed raw data avoiding the need of an inertial navigation system. After the image formation, coherent and incoherent image averaging processes have been applied to improve the image quality. The evaluation of the computational effort shows that a real-time hardware realization can be carried out using off-the-shelf digital components.

关键词： radar imaging Airborne radar Meteorological radar Aircraft Synthetic aperture radar sensor systems Frequency radar detection Layout Earth

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Inductive and capacitive sensor arrays for in situ composition sensors

Inductive and capacitive sensor arrays for in situ compositi...

引用

IEEE conference on Aerospace

作者： M.E. Van Steenberg A. Washabaugh N. Goldfine Astrophysics Data Facility NASA Goddard Space Flight Center Greenbelt MD USA JENTEK Sensors Inc. Watertown MA USA

ISBN: (纸本)0780365992

Advances in electromagnetic sensor design provide the potential for high resolution imaging of subsurface objects and material properties at the microscopic (micrometer) and mesoscopic (meter) scales. With quasi-static, capacitive and inductive sensor arrays, objects are detected, identified, and imaged via their perturbations to the applied electric and magnetic fields, rather than through time delays of reflected electromagnetic waves as in ground penetrating radar. Building on the successful application as nondestructive quality assessment and monitoring tools as well as land mine detectors, several subsurface in situ sensors are enabled by this technology. Examples include: an electronic 3D microscope, enabling examination of cell level structures and composition; examination of near surface structures such as soil moisture, permafrost dynamics, soil properties with depth, root growth carbon sequestration, Martian surface aquifers, and buried deposits of carbon dioxide or methyl hydrides.

关键词： sensor arrays Capacitive sensors Magnetic sensors Image sensors radar detection Landmine detection High-resolution imaging Material properties Microscopy Object detection

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U.S. CELRAP laser radar processor electronics

U.S. CELRAP laser radar processor electronics

引用

Pacific Rim conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： J.A. Hutchinson C.W. Trussell M. Jack J. Force I. Crawford AMSEL RD NV ST LT US Army NVESD Belvoir VA USA AMSEL RD NV ST LT US Army NVESD VA Raytheon IR Center of Excellence Goleta CA Force Labs Sterling VA USA Analog Modules Inc. Longwood FL USA

CELRAP is an ongoing U.S. Army program in multifunction laser radar technology. In the laser radar hardware, the main processor (MP) controls the operation of the scanner and linear image receivers, and collects, stor... 详细信息

关键词： Laser radar sensor arrays Circuits Optical arrays Detectors radar imaging Hardware Process control Displays Night vision

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Multi-platform GMTI tracking for surveillance and reconnaissance coalition environments

Multi-platform GMTI tracking for surveillance and reconnaiss...

引用

IEEE conference on Aerospace

作者： R. Popp H. Maney J. Jones Washington D.C. DC USA Alpha Technologies Inc. Burlington MA USA Machine Control Laboratory KAIST Daejeon South Korea

ISBN: (纸本)0780365992

The focus of this paper is to describe several recent applications of multi-platform ground moving target indicator (GMTI) tracking technology for surveillance and reconnaissance coalition environments. As part of the U.S. Air Force's 1999 Joint Expeditionary Force experiment (JEFX), we demonstrated (in stand-alone mode) GMTI tracking technology for a simulated ground target scenario consisting of 20,000+ military and civilian ground vehicles and GMTI sensor data based on multiple U.S. and coalition radar simulators (i.e., U.S. Joint STARS and Global Hawk, U.K. ASTOR, French HORIZON, Italy CRESO). As part of NATO's Joint Project Optic Windmill (JPOW) V/Clean Hunter 2000 (CN00), we demonstrated the real-time operation of GMTI tracking technology in a live military coalition exercise environment. Two such systems were supported at JPOW V/CN00: (i) an on-board system consisting of the GMTI tracker ported to a DEC ALPHA on the Navy's P3 APY-6 platform, and used by operators to track ground targets based on GMTI data produced by the APY-6 radar system alone, and (ii) an off-board system consisting of the GMTI tracker ported to a Sun Quad Ultra 80 at NATO HQ AIRNORTH at Ramstein AFB Germany, and used to track ground targets based on real GMTI data produced by both the P3 APY-6 and the French HORIZON. In addition, simulated GMTI data from the JSTARS, Global Hawk, and ASTOR radar simulators was also produced and tracked based on a simulated ground target scenario consisting of 30,000+ military and civilian ground vehicles.

关键词： Surveillance Reconnaissance radar tracking Target tracking Force sensors Land vehicles Synthetic aperture radar Space technology Adaptive optics Optical sensors

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Three-dimensional E-CSAR imaging of a T-72 tank and synthesis of its spotlight, stripmap and interferometric SAR reconstructions

Three-dimensional E-CSAR imaging of a T-72 tank and synthesi...

引用

IEEE International conference on Image Processing

作者： M.L. Bryant L.L. Gostin M. Soumekh Sensors Directorate Target Recognition Branch Air Force Research Laboratory OH USA Georgia Tech Research Institute Radar Systems Division Georgia Institute of Technology Atlanta GA USA Department of Electrical Engineering Bonner Hall State University of New York University at Buffalo Amherst NY USA

This paper presents the results of three-dimensional imaging of a T-72 tank using its angular azimuthal (turntable) and linear elevation synthetic aperture data at X band. This is achieved using an accurate and computationally-efficient wavefront (Fourier-based) reconstruction algorithm for elevation and circular (E-CSAR) data. The E-CSAR 3D images are then used to synthesize 2D spotlight and stripmap slant plane SAR images of the target at a desired range and squint angle. For this purpose, a procedure is introduced that incorporates the spatially-varying azimuthal and elevation Doppler signatures of individual reflectors on the target as well as the mean range, azimuth and elevation of the flight path. Results using the E-CSAR images of the T-72 tank are provided.

关键词： radar cross section Synthetic aperture radar Reconstruction algorithms radar measurements Image reconstruction Laboratories sensor systems and applications Target recognition Azimuth Geometry

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