气候变化领域集成服务门户(CCPortal): Evaluating Processing Choices for the Geodetic Estimation of Earth Orientation Parameters With Numerical Models of Global Geophysical Fluids

CCPortal

DOI	10.1029/2020JB020025
	Evaluating Processing Choices for the Geodetic Estimation of Earth Orientation Parameters With Numerical Models of Global Geophysical Fluids
	Dill R.; Dobslaw H.; Hellmers H.; Kehm A.; Bloßfeld M.; Thomas M.; Seitz F.; Thaller D.; Hugentobler U.; Schönemann E.
发表日期	2020
ISSN	21699313
卷号	125 期号:9
英文摘要	Different Earth orientation parameter (EOP) time series are publicly available that typically arise from the combination of individual space geodetic technique solutions. The applied processing strategies and choices lead to systematically differing signal and noise characteristics particularly at the shortest periods between 2 and 8 days. We investigate the consequences of typical choices by introducing new experimental EOP solutions obtained from combinations at either normal equation level processed by Deutsches Geodätisches Forschungsinstitut at the Technical University of Munich (DGFI-TUM) and Federal Agency for Cartography and Geodesy (BKG), or observation level processed by European Space Agency (ESA). All those experiments contribute to an effort initiated by ESA to develop an independent capacity for routine EOP processing and prediction in Europe. Results are benchmarked against geophysical model-based effective angular momentum functions processed by Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences (ESMGFZ). We find, that a multitechnique combination at normal equation level that explicitly aligns a priori station coordinates to the ITRF2014 frequently outperforms the current International Earth Rotation and Reference Systems Service (IERS) standard solution 14C04. A multi-Global Navigation Satellite System (GNSS)-only solution already provides very competitive accuracies for the equatorial components. Quite similar results are also obtained from a short combination at observation level experiment using multi-GNSS solutions and SLR from Sentinel-3A and Sentinel-3B to realize space links. For ΔUT1, however, very long baseline interferometry (VLBI) information is known to be critically important so that experiments combining only GNSS and possibly SLR at observation level perform worse than combinations of all techniques at normal equation level. The low noise floor and smooth spectra obtained from the multi-GNSS solution nevertheless illustrates the potential of this most rigorous combination approach so that further efforts to include in particular VLBI are strongly recommended. ©2020. The Authors.
英文关键词	C04; EAM; Earth orientation parameters; Earth rotation; effective angular momentum function; EOP
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187600
作者单位	Section 1.3 Earth System Modelling, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany; Federal Agency for Cartography and Geodesy BKG, Frankfurt, Germany; Deutsches Geodätisches Forschungsinstitut (DGFI-TUM), Technical University of Munich, Munich, Germany; Fachgebiet Satellitengeodäsie (FSG), Technical University of Munich, Munich, Germany; Navigation Support Office, European Space Operations Centre ESOC, Darmstadt, Germany
推荐引用方式 GB/T 7714	Dill R.,Dobslaw H.,Hellmers H.,et al. Evaluating Processing Choices for the Geodetic Estimation of Earth Orientation Parameters With Numerical Models of Global Geophysical Fluids[J],2020,125(9).
APA	Dill R..,Dobslaw H..,Hellmers H..,Kehm A..,Bloßfeld M..,...&Schönemann E..(2020).Evaluating Processing Choices for the Geodetic Estimation of Earth Orientation Parameters With Numerical Models of Global Geophysical Fluids.Journal of Geophysical Research: Solid Earth,125(9).
MLA	Dill R.,et al."Evaluating Processing Choices for the Geodetic Estimation of Earth Orientation Parameters With Numerical Models of Global Geophysical Fluids".Journal of Geophysical Research: Solid Earth 125.9(2020).