地方时间标准建立方案的研究

doi:10.3969/j.issn.1000-1158.2015.06.20

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摘要为满足卫星导航产品的检测需求,提出由国家时间基准驾驭的地方时间标准的建立方案,建立GPS共视法时间传递系统。通过数据比对使本地原子钟溯源到中国计量院的时间基准UTC(NIM),对比对数据用Vondrak平滑法进行滤波,并剔除异常数据。研究了影响比对精度的因素,包括:双频实测电离层时延,天线坐标设为固定模式,仰角选择30°以上计算,进一步提高了比对精度。作出预估方程,实现了实时的量值传递。实验结果表明,生成的地方时间标准与国家时间基准同步在±10 ns以内,并且提高了时标的准确性和稳定性。

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	黄艳
	张晗
	高源

关键词 ：地方时间标准, GPS共视法, 时间频率, 量值传递

Abstract：To test satellite navigation products, the establishing scheme of local time standard steered by national time standard is proposed. The scheme establishes a GPS common-view time transfer system, traces the local atomic clock to UTC(NIM) by data comparison, filters data by Vondrak method and abandons abnormal data. The scheme determines that can influence the comparison accuracy, including that the ionosphere delay real-time values observed at two frequencies is revised, the antenna coordinate is set to base mode, and the data with elevations above 30° are selected, so the comparison accuracy can be improved. A predict equation is solved, and the real-time value transfer is ultimately implemented. Experiments show that local time standard and national time standard synchronize within ±10ns, and the accuracy and stability are improved.

Key words： metrology local time standard GPS common-view method time and frequency value transfer

PACS:

TB939

基金资助:北斗卫星导航检测平台建设（Z12110100690000）

作者简介: 黄艳（1973-）,女,广东清远人,北京市计量检测科学研究院高级工程师,主要从事时间频率计量方面的研究。huangy@bjjl.cn

引用本文:

黄艳,张晗,高源. 地方时间标准建立方案的研究[J]. 计量学报, 2015, 36(6): 642-646.
HUANG Yan1,ZHANG Han1,GAO Yuan2. Research on the Establishing Scheme of Local Time Standard. Acta Metrologica Sinica, 2015, 36(6): 642-646.

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