摘要
介绍世界时(UT1)的数据预处理和加密方法,并分析不同加密方法、数据预处理差异等因素对UT1加密精度的影响。结合国际产品和国内联合观测的实测数据,对不同甚长基线干涉测量(VLBI)观测频次下的UT1加密精度进行分析。结果表明,不同加密方法之间,三次样条插值方法较优,且UT1插值过程中必须考虑地球固体潮影响,而高频项修正可以忽略。与每天观测相比,当观测间隔小于2 d时,UT1的偏差可稳定在0.05 ms左右,继续增大观测间隔,UT1的偏差将出现较明显的增大。国内实测数据验证表明,观测间隔为2 d的情况下,UT1的精度可达0.05 ms左右。
This paper introduces the data preprocessing and interpolation methods for universal time(UT1)and analyzes the factors affecting the interpolation accuracy of UT1,including different interpolation methods and differences in data preprocessing.The study combines international products with domestic co-observation data to analyze the interpolation accuracy of UT1 under different observation frequencies of very long baseline interferometry(VLBI).The results show that among different interpolation methods,cubic spline interpolation is superior.The interpolation process of UT1 must consider the influence of Earth’s solid tides,while high-frequency corrections can be neglected.Compared with daily observations,when the observation interval is less than 2 days,the deviation of UT1 can be stabilized at around 0.05 ms.Increasing the observation interval further will lead to a more pronounced increase of UT1 deviation.Verification using domestic observational data shows that with an observation interval of 2 days,the accuracy of UT1 can reach around 0.05 ms.
作者
马卓希
李广云
姚当
江丹
MA Zhuoxi;LI Guangyun;YAO Dang;JIANG Dan(School of Surveying and Mapping,Information Engineering University,62 Kexue Road,Zhengzhou 450001,China;61363 Troops,Xi’an 710054,China;National Time Service Center,CAS,3 East-Shuyuan Road,Xi’an 710600,China)
出处
《大地测量与地球动力学》
北大核心
2025年第9期905-909,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(42304044)。
关键词
VLBI
加强观测
UT1参数
精度评估
VLBI
intensive observation
UT1 parameter
precision evaluation
作者简介
第一作者:马卓希,博士,工程师,主要从事空间大地测量数据处理研究,E-mail:mzhx_1991@163.com;通讯作者:李广云,博士,教授,博士生导师,主要从事大地测量与测量工程、导航与位置服务等研究,E-mail:guangyun_li@163.com。
