This invention proposes a bistatic forward-looking SAR target localization method, the implementation steps of which are: initializing the bistatic forward-looking SAR target localization scene; calculating the
slant range between the
receiver and the scene center, as well as the precise position of the scene center; and obtaining the target localization result. This invention decouples the bistatic
slant range by establishing a
system of equations based on the triangle formed by the
receiver's
slant range relative to the scene center at adjacent synthetic aperture center times and the flight trajectory within the synthetic aperture time interval, and the triangle formed by the
transmitter's slant range relative to the scene center at the previous synthetic aperture center time, its projection, and the
transmitter's height. This allows for the acquisition of the
receiver's slant range relative to the scene center at the next synthetic aperture center time, avoiding the defect of amplified
beamline angle error due to sine calculations, thus improving localization accuracy. Furthermore, the data used to calculate the
transmitter's slant range relative to the scene center can be directly obtained from the constructed localization scene, without the need for
beamline angle calculations, thus possessing universality and broadening the application scope.