An Improved Method of 2D Velocity Estimation of Ship Targets for Spaceborne SAR

It has gradually become a hot spot in the ocean field to monitor ship targets by utilizing spaceborne SAR images. And the velocity estimation of them has become a necessary condition, which can not only obtain the velocity information, but also realize the refocusing and repositioning of the target. In this paper, corresponding improved algorithms are proposed for azimuth and range velocity estimation, which greatly raise the accuracy. And the algorithms are verified by simulation and measured data.