It is necessary to keep the constellation with high accuracy and high stability in a space-based gravitational wave observatory. Few orbital maneuvers are carried out in the science mode, which puts forward higher requirements for the initial constellation condition. The orbit determination method for the space-based gravitational wave observatory is mainly studied in this paper. Firstly, the orbit determination accuracy requirement of the space-based gravitational wave observatory is analyzed. And then, an orbit determination method based on an extended Kalman filter is designed to improve the orbit determination accuracy by using inter-satellite range and angle measurement information.

有必要在天基重力波天文台中保持星座的高精度和高稳定性。在科学模式下很少进行轨道机动，这对初始星座条件提出了更高的要求。本文主要研究天基重力波天文台的轨道确定方法。首先，分析了天基重力波天文台的轨道确定精度要求。然后，设计了一种基于扩展卡尔曼滤波器的轨道确定方法，以通过利用卫星间距离和角度测量信息来提高轨道确定精度。