摘要
选取国际权度局发布的4个台站2014-01-14~26的卫星双向时间频率时钟频率之差观测序列及GNSS时钟频率之差数据序列,基于时钟比对法,确定了两地之间重力位差和高程差。与EGM2008模型结果检核表明,重力位差和高程差的标准差分别为308.5m2/s2和31.5m,实验结果与目前守时台站所采用原子钟的稳定度10-15量级基本一致。
According to general relativity theory, the running rate and orthometric height of precise clock＇s are closely related, and consequently the height difference can be determined by measuring the running rate difference between two clocks located at two stations. Using the time-frequency differ- ence in observation series by the two-way satellite time and frequency transfer and those by GNSS at four stations released by the Bureau International des Poicls et Mesures, we determine the geopotential difference and height difference between arbitrary pairs of the four stations based upon the clock com- parison method. Compared to the EGM2008 model results, the standard deviations of the geopotential and height differences are respectively 308.5 m2/s2 and 31.5 m. Experimental results are consistent with the current stability level 10-15 of the atomic clocks equipped in the time-keeping stations.
出处
《大地测量与地球动力学》
CSCD
北大核心
2015年第3期495-498,共4页
Journal of Geodesy and Geodynamics
基金
国家973计划(2013CB733301)
国家自然科学基金(41174011
41429401
41210006
41128003)
关键词
卫星双向时间频率传递
GNSS
时间比对
重力位差
高程差
two-way satellite time and frequency transfer
GNSS
time comparison
geopotential difference
orthometric height difference
