北斗系统在轨卫星钟性能评估方法及结论

摘要

在轨卫星钟性能(频率准确度、稳定度、漂移率以及在轨寿命)评估是卫星导航系统性能指标评估的重要任务之一。文中结合北斗卫星钟在轨性能评估任务，介绍了几种评估北斗在轨卫星钟性能的方法及原理并进行了专题试验。试验结果表明，北斗在轨卫星原子钟性能稳定，频率准确度约为10-11，漂移率为10-13，稳定度为10-14。与国外卫星钟性能相当，能够满足北斗卫星导航系统服务指标要求。%The performances assessment of In-orbit atomic clocks is an important task in the construction and devel-opment of BDS. Combining with the tasks of BDS performance assessment some assessment methods of In-orbit a-tomic clocks of BDS have been introduced and the special tests have been developed. It was shown by test and a-nalysis that atomic clocks performances of BDS was stabile and reliable with results of frequency accuracy about 10-11 drift rate up to 10-13 and stability up to 10-14 the performance was equivalent to the foreign In-orbit atomic clocks and also meets the service requirements of BDS.