Extension of the 3-D range migration algorithm to cylindrical and spherical scanning geometries
A near field three-dimensional (3-D) synthetic-aperture radar (SAR) algorithm specially tailored for cylindrical and spherical scanning geometries is presented. An imaging system with 3-D capability can be implemented by using a stepped-frequency radar which synthesizes a two-dimensional (2-D) aperture. Typical scanning geometries commonly used are planar, cylindrical, and spherical. The 3-D range migration algorithm (RMA) can be readily used with a planar scanning geometry. This algorithm is extremely accurate, preserves the phase, and corrects for the wave front curvature. The RMA cannot be directly applied with nonplanar scanning geometries. However, as an alternative solution, we propose to back propagate the backscattered data onto a planar aperture in the vicinity of the measurement aperture and then apply the 3-D RMA. The proposed imaging algorithm is validated both numerically and experimentally.
Bibliographic Reference: An article published in: IEEE Transactions on Antennas and Propagation, Vol.49, No.10 (2001), pp.1434-1444
Record Number: 200114210 / Last updated on: 2002-01-02
Original language: en
Available languages: en