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  5. New Progress in VLBI tracking of GNSS satellites at GFZ

New Progress in VLBI tracking of GNSS satellites at GFZ

来源 :The International VLBI Service for Geodesy and Astrometry (I | 被引量 : 0次 | 上传用户：zxy556
【摘 要】
：
While the ITRF (International Terrestrial Reference Frame) is realized by the combination of the various space geodetic techniques,VLBI (Very Long Baseline Interferometry) is the only technique to det
【作 者】
：
L. Liu R. Heinkelmann V. Tornatore R. Haas J. Kodet C. Pl(o)tz U. Schreiber D. Duev G. Kronschnabl A. Neidhardt J. Li J.A. Mora-Diaz T. Nilsson M. Karbon C. Lu V. Raposo-Pulido B. Soja M. Xu S. Pogreb 
【机 构】
：
Helmholtz Centre Potsdam,GFZ German Research Centre for Geosciences,14473 Potsdam,Germany: &&Shangha
【出 处】
：
The International VLBI Service for Geodesy and Astrometry (I
【发表日期】
：
2014年5期
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论文部分内容阅读
While the ITRF (International Terrestrial Reference Frame) is realized by the combination of the various space geodetic techniques,VLBI (Very Long Baseline Interferometry) is the only technique to determine the ICRF (International Celestial Reference Frame) through its observations of extragalactic radio sources.Therefore,small inconsistencies between the two important frames do exist.According to recent comparisons of parameters derived by GNSS (Global Navigation Satellite Systems) and VLBI,e.g.troposphere delays,gradients,UT1-UTC,evidence of discrepancies becomes obvious.
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