High Frequency Variations of Earth Rotation Parameters from GPS and GLONASS Observations

	High Frequency Variations of Earth Rotation Parameters from GPS and GLONASS Observations
	Wei, Erhu 1; Jin, Shuanggen2,3 ; Wan, Lihua 1,4; Liu, Wenjie 1; Yang, Yali 1; Hu, Zhenghong 1
刊名	SENSORS
	2015-02-01
卷号	15 期号:2 页码:2944-2963
英文摘要	The Earth's rotation undergoes changes with the influence of geophysical factors, such as Earth's surface fluid mass redistribution of the atmosphere, ocean and hydrology. However, variations of Earth Rotation Parameters (ERP) are still not well understood, particularly the short-period variations (e.g., diurnal and semi-diurnal variations) and their causes. In this paper, the hourly time series of Earth Rotation Parameters are estimated using Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), and combining GPS and GLONASS data collected from nearly 80 sites from 1 November 2012 to 10 April 2014. These new observations with combining different satellite systems can help to decorrelate orbit biases and ERP, which improve estimation of ERP. The high frequency variations of ERP are analyzed using a de-trending method. The maximum of total diurnal and semidiurnal variations are within one milli-arcseconds (mas) in Polar Motion (PM) and 0.5 milli-seconds (ms) in UT1-UTC. The semidiurnal and diurnal variations are mainly related to the ocean tides. Furthermore, the impacts of satellite orbit and time interval used to determinate ERP on the amplitudes of tidal terms are analyzed. We obtain some small terms that are not described in the ocean tide model of the IERS Conventions 2010, which may be caused by the strategies and models we used or the signal noises as well as artifacts. In addition, there are also small differences on the amplitudes between our results and IERS convention. This might be a result of other geophysical excitations, such as the high-frequency variations in atmospheric angular momentum (AAM) and hydrological angular momentum (HAM), which needs more detailed analysis with more geophysical data in the future.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Analytical ; Electrochemistry ; Instruments & Instrumentation
研究领域[WOS]	Chemistry ; Electrochemistry ; Instruments & Instrumentation
关键词[WOS]	BASE-LINE INTERFEROMETRY ; POLAR MOTION ; OCEAN TIDES ; SEMIDIURNAL VARIATIONS ; ANGULAR-MOMENTUM ; PERIODIC CHANGES ; VLBI ; TERMS
收录类别	SCI
语种	英语
WOS记录号	WOS:000351992500040
公开日期	2015-08-18
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18235]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Wuhan Univ, Sch Geodesy & Geomat, Wuhan 430079, Peoples R China 2.Bulent Ecevit Univ, Dept Geosmat Engn, TR-67100 Zonguldak, Turkey 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Tech Univ Munich, Earth Oriented Space Sci & Technol, D-80333 Munich, Germany
推荐引用方式 GB/T 7714	Wei, Erhu,Jin, Shuanggen,Wan, Lihua,et al. High Frequency Variations of Earth Rotation Parameters from GPS and GLONASS Observations[J]. SENSORS,2015,15(2):2944-2963.
APA	Wei, Erhu,Jin, Shuanggen,Wan, Lihua,Liu, Wenjie,Yang, Yali,&Hu, Zhenghong.(2015).High Frequency Variations of Earth Rotation Parameters from GPS and GLONASS Observations.SENSORS,15(2),2944-2963.
MLA	Wei, Erhu,et al."High Frequency Variations of Earth Rotation Parameters from GPS and GLONASS Observations".SENSORS 15.2(2015):2944-2963.