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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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7327305 |
Process for the evaluation of signals in an SAR/MTI pulsed radar system
The invention relates to a process for the evaluating a received signal of an SAR/MTI pulsed radar system that transmits SAR and MTI pulses with respective definable pulse repetition frequency...
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7218268 |
Self-calibrating interferometric synthetic aperture radar altimeter
A synthetic aperture radar system uses RF bandwidth and Doppler beam sharpening principles to develop fine altitude and along-track resolutions. To achieve accurate cross-track position...
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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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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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6904160 |
Method for matching geographic information with recorded images
A method for matching a recorded image with geographic data substantially corresponding to a geographic location where the image was recorded, is disclosed. In a preferred embodiment, global...
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H001720 |
Time frequency processor for radar imaging of moving targets
Conventional radar uses the Fourier transform to generate a radar target image. Constraints on the use of Fourier methods requiring point scatterers to remain in their range cells and requiring...
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5590044 |
Method and apparatus for finding aircraft position by integrating accelerations less time averages
A method and apparatus for short-range position determination of aircraft, used for preventing errors in radar mapping from position inaccuracies, finds velocity in the x-direction (flight...
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5160932 |
Over-the-horizon synthetic aperture radar
An over-the-horizon, synthetic aperture radar (OTHSAR) system (10) is disclosed. The OTHSAR system is used to locate moving objects (14) at long distances in response to modulated high-frequency...
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5021789 |
Real-time high resolution autofocus system in digital radar signal processors
This autofocus is a system for improving the image quality of an airborne Synthetic Aperture Radar (SAR), that is mechanized in the high-speed digital signal processors with some control capability...
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4924229 |
Phase correction system for automatic focusing of synthetic aperture radar
A phase gradient autofocus system for use in synthetic aperture imaging accurately compensates for arbitrary phase errors in each imaged frame by locating highlighted areas and determining the...
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4879559 |
Azimuth processor for SAR system having plurality of interconnected processing modules
Synthetic aperture radar is a known system for producing a high resolution image of the terrain under a moving platform, in which the effect of a large antenna (which would give high resolution in...
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4339752 |
Synthetic array processor
A synthetic array processor wherein radar data, received from an area to be mapped during a plurality of subarray flight path segments, is electronically focused in parallel processing channels to...
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4227194 |
Synthetic array processor
The method and apparatus for processing bipolar coherent sidelooking radar data to achieve continuous real time synthetic array mapping in the form of focused line-by-line imagery. Received radar...
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4219811 |
Synthetic array autofocus system
A system for automatically focusing a synthetic array through derivation of focus error signals which may be used such as by summing a priori data so that the synthetic array data may be optimally...
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4045795 |
Charge-coupled device data processor for an airborne imaging radar system
Processing of raw analog echo data from a side-looking synthetic aperture radar receiver into images on board an airborne radar platform is made feasible by utilizing charge-coupled device (CCD)...
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3976998 |
Synthetic aperture radars
There is disclosed a synthetic aperture radar arranged to survey a region from a mobile location. The radar returns received from the region are first phase weighted by a series of predetermined...
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3680103 |
DATA PROCESSOR AND COMPACTOR THEREFOR
A data processing system and compaction means therefor sums groups of incoming data signals and provides a composite data signal for each group of signals summed. The composite signals are...
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3333267 |
Electronic data processing system
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3121868 |
High resolution object location system
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