摘要
脉冲星星历表维持着脉冲星导航所需的时空基准，其精度直接影响着航天器自主导航定位结果。本文在分析脉冲星导航所需的星历表参数基础上，对比研究了星历表参数测定的三种观测技术：地面单天线计时观测、地面VLBI观测和空间x射线观测，探讨了基于空间x射线观测获取星历表参数的可行性。研究表明，当前高精度导航用脉冲星星历表难以通过空间x射线观测手段获得，只能通过地面射电观测技术较好地获得，因此，加快我国大口径地面射电观测设施建设很有必要。
The pulsar ephemeris maintains the space - time reference for pulsar navigation, and the ephemeris precision directly affects the accuracy of autonomous navigation. Based on the analysis of the ephemeris parameters needed for pulsar navigation, comparison analysis of three kinds of technologies for measuring the ephemeris parameters are conducted in this paper, ineluding the single antenna timing observation, ground VLBI observation and space X - ray observation. The feasibility of measuring the ephemeris parameters through space X - ray observation is studied. The results indicate that the high - precision ephemeris parameters can only be achieved using the ground radio observation technology. Therefore, it is necessary to promote the construetion of large diameter ground radio observation facilities in China.
出处
《测绘科学与工程》
2015年第5期1-6,共6页
Geomatics Science and Engineering
基金
国家自然科学基金资助项目（41374003,41304022,41574013）.
