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《Beijing Surveying and Mapping》 2018-10
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Polynomial Based Accuracy Analysis and Validation of Regional Ionospheric Modeling

FU Wei;YAO Wanqiang;CHEN Peng;LIU Hang;College of Geomatics,Xi'an University of Science and Technology;  
With April 25,2015 the Global Navigation Satellite System(GNSS)dual frequency observations data,We have established of Ionospheric Grid Model in China based on Polynomial Model.And the factors such as model order and satellite cutoff height angle influence on the modeling accuracy and time of the ionosphere over the China region were analyzed.The Vertical total electron content(VTEC)of nine GNSS tracking stations under different models is calculated by interpolation function.Then it compares the measured data with the tracking station to evaluate the accuracy and reliability of the model.The results show that the order of the model has great influence on the accuracy and time of modeling,however,the cutoff angle of satellites has a little.The modeling results are basically consistent with the measured data,the China Earthquake Administration(CEA)and the data released by the Jet Propulsion Laboratory(JPL)Compared with the other two models,the proposed model improves the correction rate and modeling accuracy of the model.
【CateGory Index】: P228.4
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