Reserch on Solution Strategy of ITRF at Observation Level
1 Institute of Geography Spatial Information, Information Engineering University, 66 Middle-Longhai Road,Zhengzhou 450052, China[JP]
2 Naval Institute of Hydrographic Surveying and Charting, 40 Youyi Road,Tianjin 300061,China
Abstract：The reason of ITRF computation inconsistency at normal equation level and the advantage of combination computation at observation level are analyzed. After summarizing the research status of combination computation at observation level, the solution procedure and key issues of combination computation at observation level are analyzed. In order to overcome the computing difficulty of combination computation at observation level, the combination computation strategy based on distributed process is advanced. And then the parallel computing flow and method of the ITRF solution are designed. The study results show that the ITRF solution strategy at observation level can improve the product consistency and the distributed process technique can improve the efficiency of ITRF solution.
