US 12,078,718 B2
Generating ISAR images with distinguishable features
Raymond Samaniego, Prosper, TX (US); and John R. Goulding, Farmersville, TX (US)
Assigned to Raytheon Company, Tewksbury, MA (US)
Filed by Raytheon Company, Tewksbury, MA (US)
Filed on Feb. 17, 2022, as Appl. No. 17/674,530.
Prior Publication US 2023/0258796 A1, Aug. 17, 2023
Int. Cl. G01S 13/90 (2006.01)
CPC G01S 13/9064 (2019.05) [G01S 13/9027 (2019.05)] 18 Claims
OG exemplary drawing
 
1. A method for removing non-linearities in and object recognition based on an inverse synthetic aperture radar (ISAR) image, the method comprising:
estimating pitch and roll about range and doppler axes of a time series of ISAR images including the ISAR image;
interpolating ISAR image data in the time series of images based on the estimated pitch and roll resulting in interpolated ISAR image data;
resampling based on the interpolated ISAR image data and the time series of ISAR images resulting in enhanced images;
generating a plot of peak ground acceleration (PGA) root mean square (RMS) error versus doppler bin of the enhanced images; and
performing object recognition based on the plot.