In order to measure the landing speed

the binocular intersection measuring system is set up near the landing area to detect the landing parameters of flying target by high-speed photograph.The polynomial function of target track 3D curve is fitted with the method of least square according to the 3D coordinate of centroid at the different moments

so the flying speed can be obtained by calculating the derivatives of the polynomial function.Based on the characteristic of rotary objects

three measuring methods are proposed to measure the pose according to the size of images in the camera planes.The measuring error sources are analyzed and the methods to reduce the measuring error are also put forward.Experiments and theoretical analysis prove the exactness and effectiveness of the proposed measuring methods of speed

and the measuring error of speed is less than 2%.A new and reliable approach to measure the dynamic parameter of flying target is provided.