Handover Problem of SAR Terminal Guidance

Synthetic aperture radar(SAR) terminal guidance is divided into four stages,geometric model of handover issue is established.The two conditions,i.e.the reliable detecting and right squint angle,are analyzed.Furthermore,the trajectory of image handover is designed,and the influence of the cross acceleration and preset image angle to the starting position of image and handover time is analyzed.Lastly,combined with three-dimension guidance law,handover from SAR image to forward attack is studied,influence of SAR image time to total guidance time is analyzed.Simulation results show that the proper setting of squint angle,to increase detect probability of spotlight SAR,and to increase the missile horizontal acceleration can improve the probability of successful handover.Furthermore,the longer SAR image time is,the better the detection and recognition will be,but it will lead to more winding attack trajectory and much longer guidance time.