Vehicle track identification in synthetic aperture radar images

Title: Vehicle track identification in synthetic aperture radar images

Full Record
Similar

Various technologies pertaining to identification of vehicle tracks in synthetic aperture radar coherent change detection image data are described herein. Coherent change detection images are analyzed in a parameter space using Radon transforms. Peaks of the Radon transforms correspond to features of interest, including vehicle tracks, which are identified and classified. New coherent change detection images in which the features of interest and their characteristics are signified are then generated using inverse Radon transforms.

Inventors:: Chow, James G.

Issue Date:: 2018-07-24

OSTI Identifier:: 1464128

Assignee:: National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM) SNL-A

Patent Number(s):: 10,032,077

Application Number:: 14/927,102

Contract Number:: AC04-94AL85000

Resource Relation:: Patent File Date: 2015 Oct 29

Research Org:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE

Full Text
View Full Text

Similar records in DOepatents and OSTI.GOV collections:

Synthetic aperture radar images with composite azimuth resolution

Patent Bielek, Timothy P ; Bickel, Douglas L

A synthetic aperture radar (SAR) image is produced by using all phase histories of a set of phase histories to produce a first pixel array having a first azimuth resolution, and using less than all phase histories of the set to produce a second pixel array having a second azimuth resolution that is coarser than the first azimuth resolution. The first and second pixel arrays are combined to produce a third pixel array defining a desired SAR image that shows distinct shadows of moving objects while preserving detail in stationary background clutter.
Full Text Available March 2015
Joint synthetic aperture radar plus ground moving target indicator from single-channel radar using compressive sensing

Patent Thompson, Douglas ; Hallquist, Aaron ; Anderson, Hyrum

The various embodiments presented herein relate to utilizing an operational single-channel radar to collect and process synthetic aperture radar (SAR) and ground moving target indicator (GMTI) imagery from a same set of radar returns. In an embodiment, data is collected by randomly staggering a slow-time pulse repetition interval (PRI) over a SAR aperture such that a number of transmitted pulses in the SAR aperture is preserved with respect to standard SAR, but many of the pulses are spaced very closely enabling movers (e.g., targets) to be resolved, wherein a relative velocity of the movers places them outside of the SARmore »« less
Full Text Available October 2017
Phase correction system for automatic focusing of synthetic aperture radar

Patent Eichel, Paul H. ; Ghiglia, Dennis C. ; Jakowatz, Jr., Charles V.

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 phase disturbance or image spread associated with each of these highlight areas. An estimate of the image spread for each highlighted area in a line in the case of one dimensional processing or in a sector, in the case of two-dimensional processing, is determined. The phase error is determined using phase gradient processing. The phase error is then removed from the uncorrected image and the process is iteratively performed to substantially eliminatemore »« less
Full Text Available January 1990
Imaging synthetic aperture radar

Patent Burns, Bryan L. ; Cordaro, J. Thomas

A linear-FM SAR imaging radar method and apparatus to produce a real-time image by first arranging the returned signals into a plurality of subaperture arrays, the columns of each subaperture array having samples of dechirped baseband pulses, and further including a processing of each subaperture array to obtain coarse-resolution in azimuth, then fine-resolution in range, and lastly, to combine the processed subapertures to obtain the final fine-resolution in azimuth. Greater efficiency is achieved because both the transmitted signal and a local oscillator signal mixed with the returned signal can be varied on a pulse-to-pulse basis as a function of radarmore »« less
Full Text Available January 1997
Automatic position calculating imaging radar with low-cost synthetic aperture sensor for imaging layered media

Patent Mast, Jeffrey E.

An imaging system for analyzing structures comprises a radar transmitter and receiver connected to a timing mechanism that allows a radar echo sample to be taken at a variety of delay times for each radar pulse transmission. The radar transmitter and receiver are coupled to a position determining system that provides the x,y position on a surface for each group of samples measured for a volume from the surface. The radar transmitter and receiver are moved about the surface to collect such groups of measurements from a variety of x,y positions. Return signal amplitudes represent the relative reflectivity of objectsmore »« less
Full Text Available January 1998