王伟,李伟超,杨旭海,曹芬,陈亮

• 1:中国科学院国家授时中心
• 2:中国科学院精密导航定位与定时技术重点实验室
• 3:中国科学院大学
• 4:中国科学院大学天文与空间科学学院

摘要(Abstract)：

针对多通道调制解调器(Modem)不同接收通道间时延值差异对双向卫星时间频率传递(TWSTFT)结果产生较大影响的问题,该文通过使用卫星模拟转发器的方法,实时测量地面站设备时延。采用多台站间两两双向的方法,归算后验证设备时延对三站闭合差结果的影响。依托国家授时中心的卫星双向比对网,开展了各地面站间基于中星12号卫星的TWSTFT试验。结果表明,通道时延对闭合差结果影响较大,在通道时延扣除前,误差可达数十纳秒;而在扣除后,结果优于0.2ns。这表明:多通道Modem各通道时延值不同引起的误差可有效测量并扣除,从而多台站开展TWSTFT是可行的。这样不仅提高了TWSTFT的执行效率,方便快捷地检验地面站间时间同步的准确度,而且节约了卫星资源的占用率。

关键词(KeyWords)： 三站闭合差;双向卫星时间频率传递;调制解调器;通道时延

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41604026)

作者(Author): 王伟,李伟超,杨旭海,曹芬,陈亮

DOI: 10.16251/j.cnki.1009-2307.2019.08.002

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