Solving Velocity Ambiguity for Pulse Doppler Radar Space Target Measurement

3rd International Conference on Aeronautical Materials and Aerospace Engineering

航空航天工程

Yuan, Zhihua^1 ; Chen, Defeng^1 ; Xue, Shan^1 ; Fu, Tuo^1

School of Information and Electronic, Beijing Institute of Technology, Beijing

100081, China^1

关键词: Iterative least squares;    Numerical integration methods;    Orbit determination;    Performance requirements;    Pulse-Doppler radar;    Range-Doppler coupling;    State transition Matrix;    Velocity ambiguity resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/608/1/012038/pdf
DOI  :  10.1088/1757-899X/608/1/012038

学科分类：航空航天科学

来源: IOP

【 摘 要 】

In order to solve the problem of severe velocity ambiguity for pulse Doppler radar high-speed space orbital targets measurement, a new velocity ambiguity resolution method based on the short arc orbit determination technique is presented in this paper. By means of a modified orbit determination model, this method can adopt the original radar measurements with the range-Doppler coupling term directly. It uses the numerical integration method to solve the differential equation of the state transition matrix and corrects the range-Doppler coupling term simultaneously, and then the optimal reference orbit is obtained by using the iterative least squares method. Finally, the velocity ambiguity is determined with the accurate reference velocity which can be calculated from the above reference orbit. The experimental results indicate that the proposed method can estimate the reference velocity accurately and satisfies the performance requirement of velocity ambiguity resolution.