一种基于偏航导引的SAR卫星成像参数更新方法OA

In order to solve the problem of lack of parameter calculation methods for low-orbit synthetic aper-ture radar(SAR)satellites with yaw guidance enabled,this paper starts from the actual mission planning require-ments of a certain existing satellite to analyze the influence of yaw guidance on target visibility under the condi-tions of ascending orbit,descending orbit,left-right and side view,and then proposes a method for calculating the updated imaging parameters of yaw guidance for low-orbit SAR satellites to achieve the effect of accurately imag-ing the specified target position.Simulation results show that the yaw caused by the earth rotation has a great influ-ence on the imaging center time and oblique distance.