Daniel M Held

US Patent:

58183833, Oct 6, 1998

Filed:

Oct 28, 1994

Appl. No.:

8/331076

Inventors:

Edward F. Stockburger - North Caldwell NJ
Hugh D. Holt - West Redding CT
Daniel N. Held - Fairfield CT
Robert A. Guarino - Monroe CT

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G01S 1358

US Classification:

342109

Abstract:

An interferometric moving target radar imaging system includes a plurality of simultaneously operating apertures, receivers and processing channels which together coherently process RF return signals to image a moving vehicle. The system corrects for the different phase centers of the apertures and interferometrically combines the return signals from different apertures to attenuate the energy from stationary objects. The true azimuth location of the moving vehicle within main beam clutter spread is then determined which facilitates distinguishing between slow moving and stationary objects to detect the moving objects which are then tracked and imaged in the range doppler domain.

US Patent:

48293032, May 9, 1989

Filed:

May 18, 1988

Appl. No.:

7/195225

Inventors:

Howard A. Zebker - Pasadena CA
Daniel N. Held - Altadena CA
Jakob J. van Zul - Pasadena CA
Pascale C. Dubois - South Pasadena CA
Lynne Norikane - Arcadia CA

Assignee:

The United States of America as represented by the Administrator of the
National Aeronautics and Space Administration - Washington DC

International Classification:

G01S 1390

US Classification:

342 25

Abstract:

Two alternative methods are disclosed for digital reduction of synthetic aperture multipolarized radar data using scattering matrices, or using Stokes matrices, of four consecutive along-track pixels to produce "averaged" data for generating a synthetic polarization image.