KEYWORDS: Data modeling, Extremely high frequency, Synthetic aperture radar, 3D modeling, Radar, Device simulation, Polarization, Ka band, Sensors, Computer simulations
The U.S. Army Research, Development and Engineering Command (AMRDEC) and Redstone Test Center (RTC) at
Redstone Arsenal, Alabama have developed a Ka band, range instrumentation synthetic aperture radar (RISAR) for the
purpose of millimeter wave (MMW) target and scene characterization. RISAR was developed as one element of the
Advanced Multi-Spectral Sensor and Subsystem Test Capabilities (AMSSTC) program funded and managed by the U.S.
Army Program Executive Office for Simulation, Training and Instrumentation (PEO STRI), Project Manager for
Instrumentation, Targets and Threat Simulators (PM ITTS). The key objective of RISAR is the collection of MMW
SAR data that can be used to develop high resolution target and terrain models for use in digital and real-time hardwarein-
the-loop simulations.
The purpose of this presentation is to provide an overview of RISAR development and implementation. Example results
of funded data collections will be presented with an emphasis on the system's 3D target modeling capabilities for ground
targets, and wake characterization capabilities for littoral targets.
KEYWORDS: Radar, Synthetic aperture radar, Data modeling, 3D modeling, Extremely high frequency, Systems modeling, Sensors, Reflectors, Missiles, 3D acquisition
The U.S. Army Research, Development and Engineering Command at Redstone Arsenal, Alabama have developed a dual mode, Ka Band Radar and IIR system for the purpose of data collection and tracker algorithm development. The system is comprised of modified MMW and IIR sensors and is mounted in a stabilized ball on a UH-1 helicopter operated by Redstone Technical Test Center. Several missile programs under development require MMW signatures of multiple target and clutter scenes. Traditionally these target signatures have been successfully collected using static radars and targets mounted on a turntable to produce models from ISAR images; clutter scenes have been homogeneously characterized using information on various classes of clutter. However, current and future radar systems require models of many targets too large for turntables, as well as high resolution 3D scattering characteristics of urban and other non-homogenous clutter scenes. In partnership with industry independent research and development (IRAD) activities the U.S. Army RDEC has developed a technique for generating 3D target and clutter models using SAR imaging in the MMW spectrum. The purpose of this presentation is to provide an overview of funded projects and resulting data products with an emphasis on MMW data reduction and analysis, especially the unique 3D modeling capabilities of the monopulse radar flying SAR profiles. Also, a discussion of lessons learned and planned improvements will be presented.
KEYWORDS: Data modeling, Radar, Polarization, Extremely high frequency, Scattering, Computer simulations, Calibration, Data analysis, Process modeling, Image processing
Turntable data collection on ground targets using an instrumentation W-band monopulse radar is reported. The data collection site, instrumentation, and test methodology are described. Preliminary analysis results showing target RCS comparisons are reported. The turntable measurements are used to generate point scatterer target models for all-digital and real-time hardware-in-the-loop (HWIL) simulations. Model development techniques are described. The models are validated against measured data utilizing generic high range resolution acquisition and tracking algorithms.
KEYWORDS: Data modeling, Sensors, 3D modeling, Infrared signatures, Thermal modeling, Extremely high frequency, Process modeling, Computer simulations, Thermography, Cameras
Ka-band measurements of a 2S-3 vehicle have been utilized to develop, verify and validate point scatterer models. IR measurements of the same vehicle have been converted to models for use in multispectral HWIL simulations. The data collection methodology, model development process, and techniques for verification and validation of these models are described. Finally, results of the model outputs in comparison to measurements are given.
W-band monopulse stepped-frequency turntable measurements are reported. Data collection site, instrumentation, and test methodology are described in detail. The turntable measurements are used to generate point scatterer target models for all-digital and real-time HWIL simulations. Model development techniques are described. The models are validated against measurement data utilizing generic high range resolution acquisition and tracking algorithms. Validation methods and results are presented. Polarimetric signatures and modeling results for two ZIL-131 trucks measured in different configurations are compared. One truck has a canvas-covered bed, and the other, a command post vehicle, has a metal-covered plywood box structure on the back. Model implementation in assessment of seeker acquisition algorithms will determine capability to reject the trucks as low-value targets.
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