Accurate Shadow height measurement technology of the SAR image

Abstract: Aiming at the problem of three-dimensional target positioning in a single two-dimensional synthetic aperture radar image, a high-precision height measurement technology based on target shadow is proposed based on the results of conventional two-dimensional SAR imaging. Firstly, the height measurement error model is derived, and the influence of various parameters on the accuracy of target height estimation is quantitatively analyzed. On the basis of the precise measurement model of the grazing angle, a high-precision shadow height measurement method of SAR image is proposed, which effectively improves the target 3D positioning accuracy of SAR image and provides an effective way for the 3D precise attack of air to ground targets. Finally, the effectiveness of the method is verified by simulation and measured data.