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ROBUST PARTIAL ORDINARY RIDGE ESTIMATOR AND ITS APPLICATIONS IN GPS POSITIONING

Gui Qingming1,2), Han Songhui1),Sui Lifen2) and Liu Yanyu2) 1)Institute of Science, Information Engineering University, Zhengzhou 450001 2)Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052  
It is a difficult to determine the position in fast GPS positioning because of containing the outliers in observation data and the lack of enough observation information to make the design array be in partial ill-condition.A new robust biased estimator-robust partial ordinary ridge estimator (RPORE) is proposed. The selection method for choosing the partial ridge parameter is established. The computed results of GPS data show that the new estimator has the characteristics of high precision,fast speed and stability.
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