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《Engineering of Surveying and Mapping》 2015-01
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Application of GM(1,1) model with additional error correction to satellite clock bias forecast

LIU Tie-zhu;YANG Deng-ke;MA Xiang-xiang;Zhengzhou Municipal Engineering Design & Research Institute;Huating Coal Group;  
A new way is proposed which can be used to forecast the clock error by the GM(1,1)model with additional error correction.Firstly,making the GM(1,1)model by using observation,and then using the existing redundant observation to forecast residual error correction model;finally using the correction model to correct the forecast results.At the same time,in order to guarantee its reliability,a fixed threshold is presented.The result shows that the new method can significantly improve the accuracy,especially that the GM(1,1)model forecast results have larger deviation system.
【CateGory Index】: P228.4
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