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7619554 |
Passive radar utilizing space-borne digital electromagnetic illuminators
In a passive radar system a space-borne transmitter broadcasts wide-band digitally modulated signals over a region and illuminates the region. A receiver antenna is oriented to receive radiation...
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7609196 |
Method and device for imaging test objects by means of electromagnetic waves, in particular for inspecting individuals for suspicious items
A method for imaging test objects by means of electromagnetic waves, in particular for the purpose of checking individuals for suspicious articles, in which method the test object is illuminated by...
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7598900 |
Multi-spot inverse synthetic aperture radar imaging
Providing multi-spot inverse synthetic aperture radar (ISAR) imagery is disclosed. Embodiments of techniques in accordance with the present disclosure may advantageously improve multiple target...
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7586434 |
Method and system for mapping a target scene using scanning radar
A system and method for mapping a target scene by means of scanning radar utilizing the Doppler effect that arises in the event of movement between radar and target scene, where the movement of a...
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7583221 |
Method and device for imaging test objects by means of millimeter waves, in particular for inspecting individuals for suspicious objects
A method for imaging test objects by millimeter waves, especially for checking individuals for suspicious objects is provided, whereby the test object is gradually irradiated with millimeter waves...
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7567198 |
Subaperture 3D imaging
Embodiments of methods, apparatuses, and articles for receiving phase history data collected from synthetic aperture radar imaging of a terrain, dividing the received phase history data into a...
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7561096 |
Subsurface imaging radar
The present invention can be summarized by use of a diffraction limited SAR giving large integration angle and a short depth of field which gives that energy from underground targets is focused...
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7551119 |
Flight path-driven mitigation of wavefront curvature effects in SAR images
A wavefront curvature effect associated with a complex image produced by a synthetic aperture radar (SAR) can be mitigated based on which of a plurality of possible flight paths is taken by the SAR...
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7545307 |
Target recognition system and method with unknown target rejection
The present invention describes a new QR enclosing voting scheme that allows the extraction of base signatures of objects using a shortest path QR algorithm, providing a probability distribution...
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7537181 |
Guidance system
There is provided a guidance system for allowing an air vehicle to guide a moving object, comprising a Synthetic Aperture Radar located on the air vehicle, and a means of communication for allowing...
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7535412 |
Single pulse imaging radar system and method
A single pulse imaging (SPI) radar system for creating a radar image from a plurality of Doppler phase-shifted return radar signals in a radar environment of moving targets includes a transmitter;...
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7532150 |
Restoration of signal to noise and spatial aperture in squint angles range migration algorithm for SAR
A moving radar generates a search mode synthetic aperture image of a patch having a principal scatterer. The boundaries of the patch are from R 0 to R 1 slant range and θ 0 to θ 1 azimuth...
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7511656 |
Spotlight synthetic aperture radar (SAR) system and method for generating a SAR map in real-time using a modified polar format algorithm (PFA) approach
Embodiments of spotlight synthetic aperture radar (SAR) systems and methods generating a SAR map in real time with minimum latency using a modified Polar Format Algorithm are generally described...
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7511655 |
Method and apparatus for 3-D sub-voxel position imaging with synthetic aperture radar
A method and apparatus for determining three dimensional sub-voxel positions using synthetic aperture radar. The apparatus includes at least four non-coplanar, phase-coherent synthetic aperture...
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7504985 |
Multi-dimensional real-array radar antennas and systems steered and focused using fast fourier transforms
Radar systems are disclosed that include a signal generator, an antenna, a switching circuit, an I/Q sampling and signal-demodulation (demodulation) processor, and a FFT processor. The signal...
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7482970 |
Method for producing map images of surface sea current velocity vectors and altimetric radar system using the method
A method for producing map images of current velocity vectors at the surface sea is described in which beams of electromagnetic waves are emitted towards the surface using a system, towards the...
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7479918 |
Vehicle-mounted ultra-wideband radar systems and methods
Vehicle-mounted UWB systems and/or methods for detecting mines and other explosive devices are provided. In certain exemplary embodiments, a system for detecting non-buried mines and/or improvised...
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7456780 |
Method and system for developing and using an image reconstruction algorithm for detecting and imaging moving targets
Image reconstruction approaches that use standard Cartesian-sampled, frequency-domain SAR data, which can be collected by a platform with a single radar antenna, together with its associated...
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7456779 |
System and method for 3D radar image rendering
A 3D rendered image of a radar-scanned terrain surface is provided from a radar return signal from the surface, wherein the return signal includes data indicative of azimuth, elevation, and range...
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7436349 |
Controlling data collection to support SAR image rotation
A desired rotation of a synthetic aperture radar (SAR) image can be facilitated by adjusting a SAR data collection operation based on the desired rotation. The SAR data collected by the adjusted...
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7420504 |
Method of operating a multibeam radar
A method of operating a multibeam radar carried on a platform flying a mission over a prescribed flight path to obtain images of a plurality of target areas, the beams of said radar being the...
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7417641 |
Aeronautical chart display apparatus and method
A method and apparatus for converting electronic display aeronautical chart data to aeronautical chart data that is tailored for an avionics display is disclosed. The method and apparatus received...
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7414566 |
System for monitoring airport area
A system is for recognizing obstructions and monitoring movements on or above an airport area ( 1 ) with sensors ( 2, 3, 4 ). A sensor ( 2 ) is a radar device having a plurality of antenna elements...
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7411540 |
Synthetic aperture radar (SAR) data compression
A method of compressing phase history (PH) data includes (a) dividing PH data into multiple sub-apertures; (b) transforming the sub-apertures into multiple coarse resolution images; and (c)...
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7397418 |
SAR image formation with azimuth interpolation after azimuth transform
Two-dimensional SAR data can be processed into a rectangular grid format by subjecting the SAR data to a Fourier transform operation, and thereafter to a corresponding interpolation operation....
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7372393 |
Method and system for determining unwrapped phases from noisy two-dimensional wrapped-phase images
A method converts an input image of noisy wrapped phases to an output image of absolute unwrapped phases. The noisy wrapped phases in the input image are represented as a set of re-wrapped phases...
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7301495 |
Interrupt SAR implementation for range migration (RMA) processing
A moving radar ( 405 ) generates a synthetic aperture image from an incomplete sequence of periodic pulse returns. The incomplete sequence of periodic pulse returns has one or more missing pulses....
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7298922 |
Synthetic panchromatic imagery method and system
Method and system for generating synthetic panchromatic imagery. A method for making a multi-spectral image includes capturing a panchromatic image of an imaging target. Additionally, the method...
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7277042 |
Compensation of flight path deviation for spotlight SAR
A radar acquires a formed SAR image of radar scatterers in an area around a central reference point (CRP). Target(s) are within the area illuminated by the radar. The area covers terrain having a...
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7245250 |
Synthetic aperture radar image compression
A method is disclosed of generating multi-resolution images using synthetic aperture radar (SAR) phase history data. A high resolution SAR image may be formed from the phase history data, or a...
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7239263 |
Platform shake compensation method in synthetic aperture processing system
The present information comprises the stages of: applying frequency analysis to positional information on a platform, generating virtual positional information on the platform based on a frequency...
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7236125 |
Method for reducing angular blur in radar pictures
A method for reducing angular blur in radar pictures achieved in range bin based detection systems includes measuring a variable S(x, y) such as amplitude or power as a function of an angle x and a...
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7212149 |
System, method and computer program product for detecting and tracking a moving ground target having a single phase center antenna
A synthetic aperture radar (SAR) system having a single phase center antenna is provided, the SAR system including a measurement unit and a tracker unit. The measurement unit is capable of...
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7205927 |
Technique for low grazing angle 3D SAR target recognition
A radar on a moving platform for three dimensional target recognition of a target on a flat or sloping terrain is described. The target is illuminated from a plurality of locations to generate...
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7196653 |
Imaging apparatus and method
An imaging apparatus has transmitter illuminating a selected surface with a radar beam footprint, and processor for profiling/processing the radar returns so as to derive attitude information in...
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7190302 |
Sub-surface radar imaging
Detailed is radar imaging apparatus including a single transmit antenna and at least one receive antenna, scanning apparatus (e.g. a pantograph) for mechanically scanning the antennas over a...
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7183963 |
System and method for inspecting transportable items using microwave imaging
An inspection system uses microwave radiation to capture a microwave image of a transportable item. The system includes a transmit scanning panel including a transmit array of transmit antenna...
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7151476 |
Radar system having a beamless emission signature
A radar system having a beamless emission signature is described. In one implementation, the radar system includes a transmission system and a receiver system. The transmission system is configured...
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7145497 |
Robust detection technique of fixed and moving ground targets using a common waveform
Detection of moving targets in SAR images is improved by a radar on a moving platform for generating a focused synthetic aperture image of a scene The scene contains a target described by pixels...
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7142149 |
Mensuration for the conformal range migration algorithm
A radar system is mounted on a moving platform moving along a great circle. The radar comprises a radar receiver for digitizing radar returns having a phase from a scatterer (target) in a scene. A...
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7126524 |
Motion compensation for convolutional SAR algorithms
A synthetic aperture image of a scene is acquired using a radar system. The scene has one or more radar scatterers located on a horizontal flat {circumflex over (x)},ŷ plane. The radar system is...
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7119732 |
Bistatic and multistatic system for space situational awareness
Provided is a bistatic and multistatic system for detecting and identifying a target in close proximity to an orbiting satellite. An electromagnetic fence is established to surround the satellite,...
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7109911 |
Dual synthetic aperture radar system
The dual synthetic aperture array system processes returns from the receiving arrays. The two identical receiving arrays employing displaced phase center antenna techniques subtract the...
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7107146 |
Methods and systems for generating a terrain elevation map in a cartesian format
Methods, systems, and computer program products for re-sampling terrain data in a vehicle from latitude/longitude format into a Cartesian format. The present invention permits incremental updates...
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7106250 |
Robust predictive deconvolution system and method
A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal;...
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7106243 |
Technique for enhanced quality high resolution 2D imaging of ground moving targets
A radar receiver on a moving platform images a moving target and non-moving clutter using a single SAR array. The radar receiver converts the radar returns into digital radar returns and motion...
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7106242 |
High range resolution radar system
Described herein is a method and apparatus for improving high range resolution of a radar system. The method comprises phase shifting a radar pulse to be transmitted at substantially the radar...
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7095359 |
Method of observing sea ice
An ice thickness/drifting velocity observation of sea ice by using an ice thickness measurement sonar and a current meter moored into the sea and a sea ice observation by a high-resolution airborne...
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7042386 |
Sub-aperture sidelobe and alias mitigation techniques
Methods for mitigating sidelobes and aliases, providing levels of suppression in excess of 20 dB. The methods may include 1) a version of the CLEAN algorithm developed in radio astronomy, modified...
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7038612 |
Method for SAR processing without INS data
A Synthetic Aperture Radar (SAR) avoids the need for an INS/GPS by focusing a SAR image having discernible features and a center. The image is formed from digitized returns, each of the digitized...
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