摘要
针对进一步降低广播星历拟合误差,文章提出了一种改进的GPS 24参数广播星历,并给出了广播星历的改进算法。实验结果表明:对于4h拟合长度,GPS全星座所有卫星、所有弧段的三维位置拟合性能均有显著提升,三维位置拟合误差的均方根值和最大值分别降低87%和47%,以三维位置拟合误差的均方根值作为评价指标,改进的GPS 24参数广播星历拟合精度达到毫米级。
In this paper, a kind of improved 24 parameters GPS broadcast ephemeris is proposed, in order to further reduce the broadcast ephemeris fitting error. The test results show that, fitting performance of three-dimensional position for all GPS satellite constellation and all arcs has been improved corresponding four hours fitting step length. The root mean square of 3D position fitting error was decreased by 87 %. And the maximum value of 3D position fitting was decreased by 47 %. By taking the root mean square error of fit three-dimensional position as the evaluation index, the improved GPS 24 broadcast ephemeris fitting accuracy is millimeter level.
出处
《航天器工程》
2014年第4期27-32,共6页
Spacecraft Engineering
关键词
GPS卫星
广播星历参数改进
拟合算法
GPS
improvement of broadcast ephemeris parameters
fitting algorithm
