空间站和GNSS共视的差别及精度对比分析

为了对比空间站和导航卫星共视的性能差异，深入分析影响共视性能的主要误差源特征，推进共视技术进一步发展，以对共视时间比对基本原理的分析为基础，从系统设计和关键误差源影响两个方面对比分析空间站和导航卫星共视的差异。理论研究结果表明，不同于导航卫星共视，轨道误差是影响空间站共视精度进一步提升的主要因素；此外，空间站共视还需考虑地球引力时延等精细误差的影响。最后，设计并实施了仿真实验和实测实验，通过实验数据进一步对比两者的性能差异。实验结果表明空间站和导航卫星共视各有利弊，虽然空间站共视的服务区域和连续性逊于导航卫星共视，但可以实现的共视精度至少比导航卫星高一个数量级。

Common view Differences between Space Station and GNSS and Accuracy Analysis

In order to compare the common view differences between the space station and the global navigation satellite system, deeply analyze the characteristics of the main error sources affecting the common view performance and promote the further development of the common view technology, based on the analysis of the basic principle of the common view time comparison, the differences between the space station and navigation satellite common view are compared and analyzed from the aspects of system design and the impact of key error sources. The theoretical research results show that, different from the navigation satellite, the orbital error is the main factor affecting the further improvement of the common view accuracy of the space station. In addition, the effects of fine errors such as Earth gravity delay should be considered. Finally, simulation experiments and practical test experiments are designed and implemented, and the performance difference is further compared. The comparison results show that each of these two common view technologies has its own advantages and disadvantages. Although the common view service area and continuity of the space station are inferior to that of the navigation satellite, its performance is at least an order of magnitude better than that of the navigation satellite.