大地测量与地球动力学2025，Vol.45Issue(9)：905-909,5.DOI:10.14075/j.jgg.2024.09.437
VLBI观测频次对UT1加密精度的影响
Impact of VLBI Observation Frequency on the Accuracy of UT1 Determination
摘要
Abstract
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 inter-polation 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 obser-vation 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.Com-pared 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.关键词
VLBI/加强观测/UT1参数/精度评估Key words
VLBI/intensive observation/UT1 parameter/precision evaluation分类
天文与地球科学引用本文复制引用
马卓希,李广云,姚当,江丹..VLBI观测频次对UT1加密精度的影响[J].大地测量与地球动力学,2025,45(9):905-909,5.基金项目
国家自然科学基金(42304044). National Natural Science Foundation of China,No.42304044. （42304044）
