CHEN Junping, ZHANG Yize, XIE Yibing, ZHOU Xuhua. Rapid Data Processing of Huge Networks and Multi-GNSS Constellation[J]. Geomatics and Information Science of Wuhan University, 2014, 39(3): 253-257. DOI: 10.13203/j.whugis20120712
Citation:
CHEN Junping, ZHANG Yize, XIE Yibing, ZHOU Xuhua. Rapid Data Processing of Huge Networks and Multi-GNSS Constellation[J]. Geomatics and Information Science of Wuhan University, 2014, 39(3): 253-257. DOI: 10.13203/j.whugis20120712
CHEN Junping, ZHANG Yize, XIE Yibing, ZHOU Xuhua. Rapid Data Processing of Huge Networks and Multi-GNSS Constellation[J]. Geomatics and Information Science of Wuhan University, 2014, 39(3): 253-257. DOI: 10.13203/j.whugis20120712
Citation:
CHEN Junping, ZHANG Yize, XIE Yibing, ZHOU Xuhua. Rapid Data Processing of Huge Networks and Multi-GNSS Constellation[J]. Geomatics and Information Science of Wuhan University, 2014, 39(3): 253-257. DOI: 10.13203/j.whugis20120712
1Shanghai Astronomical Observatory,Shanghai 200030,China;2College of Surveying and Geo-informatics,Tongji University,Shanghai 200092,China
Funds: The National Natural Science Foundation of China,Nos.41174024,11273046,40974018;the 100Talents Programof the Chinese Academy of Sciences;the National High Technology Research and Development Program of China(863Program),No.2013AA122402;the Shanghai Committee of Science and Technology,No.12DZ2273300,13PJ1409900.
Objective In the first part of the paper we discuss the challenges of huge networks and multi-GNSS da-ta processing for the zero-difference(ZD)strategy.Using 4weeks’of data from global IGS GPS/GLONASS stations,we performed daily data processing with data sampling ranging from 5-15min.Acomparison of the processing time and product precision under different sampling data shows:①Computation efficiency is greatly improved by increasing data sampling;our results show the improve-ment of maximum 52%;② Difference of product precision was marginally observed,and product pre-cision is almost the same when the sampling rate was changed from 5-10min.To analyze the impact ofdifferent products on positioning applications,we performed PPP for 22globally distributed IGS sta-tions and kinematic precise orbit determination for GRACE satellites using products generated fromdifferent data sampling procedures.Results show:①Ｓｔａｔｉｃ ＰＰＰ ｐｒｅｃｉｓｉｏｎ ｄｉｆｆｅｒｓ ｂｙ ｌｅｓｓ ｔｈａｎ ２ｍｍand 6mm for the horizontal and height components,respectively;②ｋｉｎｅｍａｔｉｃ ＰＰＰ ｐｒｅｃｉｓｉｏｎ ｄｉｆｆｅｒｓby less than 1.5cm for each coordinate component and less than 2cm in three-dimensions.
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