Patents by Inventor Freddie E. Heard

Freddie E. Heard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Comparing range data across the slow-time dimension to correct motion measurement errors beyond the range resolution of a synthetic aperture radar
    Patent number: 7777665
    Abstract: 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 slow-time dimension of the input data in order to estimate the error. Once the error has been determined, appropriate frequency and phase correction can be applied to the uncompressed input data, after which range and azimuth compression can be performed to produce a desired SAR image.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: August 17, 2010
    Assignee: Sandia Corporation
    Inventors: Armin W. Doerry, Freddie E. Heard, J. Thomas Cordaro
  • Decreasing range resolution of a SAR image to permit correction of motion measurement errors beyond the SAR range resolution
    Patent number: 7760128
    Abstract: 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 slow-time dimension of the input data in order to estimate the error. Once the error has been determined, appropriate frequency and phase correction can be applied to the uncompressed input data, after which range and azimuth compression can be performed to produce a desired SAR image.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: July 20, 2010
    Assignee: Sandia Corporation
    Inventors: Armin W. Doerry, Freddie E. Heard, J. Thomas Cordaro
  • Correction of motion measurement errors beyond the range resolution of a synthetic aperture radar
    Patent number: 7391357
    Abstract: 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 slow-time dimension of the input data in order to estimate the error. Once the error has been determined, appropriate frequency and phase correction can be applied to the uncompressed input data, after which range and azimuth compression can be performed to produce a desired SAR image.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: June 24, 2008
    Assignee: Sandia Corporation
    Inventors: Armin W. Doerry, Freddie E. Heard, J. Thomas Cordaro