Effects of the differences between the ITRF2000 and ITRF2005 models in GNSS data processing  

作　　者：Zhan Wei Zhu Shuang Yang Bo Wu Yanqiang Liu Zhiguang Meng Xiangang 

机构地区：[1]State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University [2]First Crust Monitoring and Application Center,China Earthquake Administration [3]Institute of Earthquake Science,China Earthquake Administration

出　　处：《Geodesy and Geodynamics》2013年第4期46-50,共5页大地测量与地球动力学（英文版）

基　　金：supported by the Special Earthquake Research Project Granted by the China Earthquake Administration(201308009)

摘　　要：In comparison with the ITRF2000 model, the ITRF2005 model represents a significant improvement in solution generation, datum definition and realization. However, these improvements cause a frame difference between the ITRF2000 and ITRF2005 models, which may impact GNSS data processing. To quantify this im- pact, the differences of the GNSS results obtained using the two models, including station coordinates, base- line length and horizontal velocity field, were analyzed. After transformation, the differences in position were at the millimeter level, and the differences in baseline length were less than 1 ram. The differences in the hori- zontal velocity fields decreased with as the study area was reduced. For a large region, the differences in these value were less than 1 mm/a, with a systematic difference of approximately 2 degrees in direction, while for a medium-sized region, the differences in value and direction were not significant.In comparison with the ITRF2000 model, the ITRF2005 model represents a significant improvement in solution generation, datum definition and realization. However, these improvements cause a frame difference between the ITRF2000 and ITRF2005 models, which may impact GNSS data processing. To quantify this im- pact, the differences of the GNSS results obtained using the two models, including station coordinates, base- line length and horizontal velocity field, were analyzed. After transformation, the differences in position were at the millimeter level, and the differences in baseline length were less than 1 ram. The differences in the hori- zontal velocity fields decreased with as the study area was reduced. For a large region, the differences in these value were less than 1 mm/a, with a systematic difference of approximately 2 degrees in direction, while for a medium-sized region, the differences in value and direction were not significant.

关 键 词：ITRF2000 ITRF2005 GNSS data processing DIFFERENCE effect 

分 类 号：P203[天文地球—测绘科学与技术]