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| Number | Title | Issue Date |
| 8154435 | Stability monitoring using synthetic aperture radar A stability monitoring system is described that provides an accurate, automated, and remote way of monitoring small movements over a large surface area without the need to pre-place reflective targets using a mobile SAR. The stability monitoring system allows the ra... | 04/10/2012 |
| 8134490 | Synthetic aperture radar process A continually adapted pulse-to-pulse shift, performed in the azimuth direction, of the phase center which is electrically active on the side of the transmitting antenna (Tx; Tx1, Tx2, Tx3), in connection with the SAR antenna control ... | 03/13/2012 |
| 8134489 | System and method for bistatic change detection for perimeter monitoring A method for monitoring an area that involves transmitting a first electromagnetic wave signal from a mobile platform moving over a ground surface, toward the ground surface. A receiver is used that is located remote from the mobile platform to receive the first ele... | 03/13/2012 |
| 8098188 | Method of characterizing the convection intensity of a cloud, by a meteorological radar The present invention relates to a method of characterizing the convection intensity of a cloud by a meteorological radar. The reflectivity of said cloud to an electromagnetic wave being distributed in space, the distribution of the reflectivity being discret... | 01/17/2012 |
| 8063815 | Method and system for automatic classification of objects A new method has been developed as an attempt to improve speed and robustness of existing ISAR classification methods. The new method produces a set of silhouettes of possible models in a 3D model database. The set of silhouettes of each model views the model from v... | 11/22/2011 |
| 8035545 | Vehicular surveillance system using a synthetic aperture radar According to one embodiment, a system for gathering intelligence, surveillance, and reconnaissance information comprises a synthetic aperture radar that is housed within an enclosure coupled to a land vehicle. The synthetic aperture radar includes an antenna array t... | 10/11/2011 |
| 8013778 | High-resolution synthetic aperture radar device and antenna for one such radar The invention relates to a high-resolution synthetic aperture radar device (10) comprising at least one transmitting antenna (TX1-TX3) for producing and emitting radar pulses for scanning an object (12), a receiving antenna (14) fo... | 09/06/2011 |
| 7969345 | Fast implementation of a maximum likelihood algorithm for the estimation of target motion parameters A system and method for implementing a maximum likelihood estimator for making a joint estimation of range, range rate, and acceleration of a target utilizing a pulse doppler radar. The MLE of target motion parameters are determined by keystone processing a baseband... | 06/28/2011 |
| 7961134 | Metric and self-calibration for an automatic, surveillance-based change detection system operating on noisy imagery Self-calibrating an automatic, surveillance-based change detection system operating on noisy imagery comprises detecting a first image co-registered with a second image, wherein the first image and the second image each comprise pixels of a noisy image of a scene; d... | 06/14/2011 |
| 7932852 | RFI suppression in SAR A filter scheme for broadcast interference cancellation that is computationally efficient and numerically robust Airborne Low Frequency Synthetic Aperture Radar (SAR) operating in the VHF and UHF bands has been shown. At least interference Doppler filtering or inter... | 04/26/2011 |
| 7911372 | Active imaging using satellite communication system An active imaging system uses communication satellites to identify the location and physical attributes of a target. A transmitter emits a time-synchronized signal directed to a target. The transmitter radiates L-band RF signals. The transmitter can be positioned on... | 03/22/2011 |
| 7825847 | Synthetic aperture radar, compact polarimetric SAR processing method and program To provide a synthetic aperture radar for achieving a compact polarimetric SAR easily by using a general-purpose phased array antenna for vertical and horizontal polarizations. An antenna section is a phased array antenna for vertical and horizontal polarizations ca... | 11/02/2010 |
| 7768441 | Geodesy via GPS and INSAR integration A method for representing surface deformation measurements, including providing InSAR data, wherein the InSAR data is line of sight InSAR data; providing Global Positioning System (GPS) data; filtering the InSAR data; assembling the GPS data over a time span; resolv... | 08/03/2010 |
| 7724176 | Antenna array for an inverse synthetic aperture radar According to one embodiment, an antenna array includes a plurality of racks that are each configured with a plurality of antenna elements. Each rack may be rotated relative to the other racks through an axis that is generally parallel to the axis of other racks. Eac... | 05/25/2010 |
| 7714765 | Synthetic aperture perimeter array radar A perimeter antenna array for a radar, in particular a slope monitoring radar, formed from a pair of parallel linear arrays of receiver elements and a pair of parallel linear arrays of receiver elements, together forming a rectangle of receiver and transmitter eleme... | 05/11/2010 |
| 7705768 | Radar image processor and method of radar image processing In a radar image processing device and a radar image processing method which can accurately extract a change of a ground surface, a communication interface unit (10) obtains a plurality of radar image data of a same observation target obtained at different ti... | 04/27/2010 |
| 7639171 | Radar system and method of digital beamforming A radar system and method is provided, in which the radar system includes a first transmitting portion of antenna elements, a second transmitting portion of antenna elements, and a receiving portion of antenna elements, such that the receiving antenna elements form ... | 12/29/2009 |
| 7633427 | Active imaging using satellite communication system An active imaging system uses communication satellites to identify the location and physical attributes of a target. A transmitter emits a time-synchronized signal directed to a target. The transmitter radiates L-band RF signals. The transmitter can be positioned on... | 12/15/2009 |
| 7598899 | Method and apparatus for compression of SAR images A computer system for compressing synthetic aperture radar (SAR) images includes a database for storing SAR images to be compressed, and a processor for compressing a SAR image from the database. The compressing includes applying an anisotropic diffusion algorithm t... | 10/06/2009 |
| 7589662 | Synthetic aperture radar systems and methods A method of determining a radar receiver path, comprising the steps of: obtaining a transmitter position; obtaining a target position and velocity; obtaining a radar receiver position and velocity; determining a transmitter aspect angle gradient, a transmitter aspec... | 09/15/2009 |
| 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 platform upon which the radar's antenna is mounted is calculated utili... | 09/08/2009 |
| 7551118 | RFI suppression in SAR A filter scheme for broadcast interference cancellation that is computationally efficient and numerically robust Airborne Low Frequency Synthetic Aperture Radar (SAR) operating in the VHF and UHF bands has been shown. At least interference Doppler filtering or inter... | 06/23/2009 |
| 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 when capturing the image. The mitigation can be performed differentl... | 06/23/2009 |
| 7538712 | Method and apparatus for decompression of SAR images A computer system for decompressing synthetic aperture radar (SAR) images includes a database for storing SAR images to be decompressed, and a processor for decompressing a SAR image from the database. The decompressing includes receiving the SAR image, performing a... | 05/26/2009 |
| 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 generator produces energization signals. The antenna has multiple individu... | 03/17/2009 |
| 7498968 | Synthetic aperture design for increased SAR image rate High resolution SAR images of a target scene at near video rates can be produced by using overlapped, but nevertheless, full-size synthetic apertures. The SAR images, which respectively correspond to the apertures, can be analyzed in sequence to permit detection of ... | 03/03/2009 |
| 7474249 | Systems and methods for dedicating power to a radar module Systems and methods presented herein are generally directed to providing power to a radio frequency module of a radar antenna. For example, a system comprises a dedicated power cell that supplies a power signal and includes a dedicated solar power module that genera... | 01/06/2009 |
| 7436348 | Interferometer-type radar A transmitter for transmitting signals to targets and a receiver having a large-diameter array antenna for receiving signals reflected from targets are included. The transmitter has a function of outputting an FMCW signal for detecting direction and velocity of the ... | 10/14/2008 |
| 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 result of respective transmit pulses and beam returns being received by re... | 09/02/2008 |
| 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) compressing each of the coarse resolution images. Compressing each of the co... | 08/12/2008 |
| 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. Because the interpolation operation follows the Fourier transform operati... | 07/08/2008 |
| 7391358 | Weather radar echo tops forecast generation Described are a method and a system for generating a short-term forecast of echo tops as defined by weather radar measurements. The method includes receiving echo tops images for different times. An echo tops growth rate and an echo tops maximum value are determined... | 06/24/2008 |
| 7391357 | Correction of motion measurement errors beyond the range resolution of a synthetic aperture radar Motion measurement errors that extend beyond the range resolution of a synthetic aperture radar (SAR) can be corrected by effectively decreasing the range resolution of the SAR in order to permit measurement of the error. Range profiles can be compared across the sl... | 06/24/2008 |
| 7385553 | Process for mapping multiple-bounce ghosting artifacts from radar imaging data Described herein are frequency-domain back-projection processes for forming spotlight synthetic aperture radar (“SAR”) images that are not corrupted by the effects of multiple-bounce ghosting artifacts. These processes give an approximately exact reconstruction ... | 06/10/2008 |
| 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 and a set of phase shifts. The set of re-wrapped phases are partitione... | 05/13/2008 |
| 7348917 | Synthetic multi-aperture radar technology Systems and methods of improving synthetic aperture radar (SAR) system are disclosed. In particular, an example system includes a radar signal radiator configured to transmit radar signal pulses that have a partial bandwidth at a regular interval. The partial bandwi... | 03/25/2008 |
| 7336217 | Method and apparatus for interferometric radar measurement In a method for interferometric radar measurement, at least two side looking RADAR systems on satellite and/or missile-supported platforms illuminate a common surface area by means of microwave signals. A first side looking RADAR system sends a first radar signal on... | 02/26/2008 |
| 7333047 | System and method for spatially diverse radar signal processing An ultra wideband radar system for detecting objects where at least one of the radar system or the object is moving. The radar may be scanned in at least one dimension, which may include angle or range. The system includes a scan combiner that combines scan informat... | 02/19/2008 |
| 7333049 | Waveform ambiguity optimization for bistatic radar operation A radar transmitter is at a first location on a moving platform and illuminates a target with a sequence of frequency modulated radar pulses. The frequency modulated pulses are linear frequency modulated, i.e. chirped. The target reflects the frequency modulated rad... | 02/19/2008 |
| 7324042 | Monostatic radar beam optimization A method and system for optimizing transmit beam and receive beam antenna radiation patterns. The method includes inputting initial estimate of beam weights for a transmit beam and a receive beam to an optimizer; and using a cost function to optimize beam weights so... | 01/29/2008 |
