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《Gnss World of China》 2005-02
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Research on the precision and stability of the solution of GPS cors

LONG Hua-ping,HU You-jian,ZENG Yun (Department of Surveying Engineering,China University of Geosciences, Wuhan Hubei 430074, China )  
In this paper, the corelation between the precision of CORS solution and the amount of data used to generate the solution is investigated using the raw observation data of Victorian GPS Continuously Operating Reference Stations Network (Australia),GPS precise data processing software and statistic analysis method. It is demeonstrated that the precision of GPS network solution are strongly related to the amount of data and the corelation can be expressed using non-linear equation. The precision of solutuion is quickly improved along with the increase of amount of data if it is within 6 hours and then the precision of solutuion is very slowly improved when the amount of data is more than 6 hours. When the mean baseline length of a GPS network is a few hundred km and its longest baseline is more than 1000 km, the precisio and stability of less than 6 hours solution are lower and not suitable for high precision measurement and positioning. The solution tends to become stable after the amount of data is more than 12 hours. The stability of 24 hours solution (single day solution) is very high and its precion of coordinate is better than5mm. The results also shows that the solution of GPS network converges at single day solution along with the increase of amout of data.
【CateGory Index】: P228.4
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【Co-references】
Chinese Journal Full-text Database 10 Hits
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