全球定位系统2016，Vol.41Issue(5)：93-98,6.DOI:10.13442/j.gnss.1008-9268.2016.05.019
基于GIM的Klobuchar电离层模型的精度及影响因素分析
Precision and Influential Factors Analysis of Klobuchar IonosphericModel Based on GIM on Global Scale
摘要
Abstract
The Klobuchar model parameters provided by GPS broadcast ephemeris of the year of 2003-2014 were used to calculate the global ionospheric delay,and then analysed the precision of the Klobuchar model by referring high-precision global ionospheric maps (GIM) data issued by CODE,and explore the accuracy of the model correlated with the solar activity and geomagnetic activity.The results showed that Klobuchar model accuracy with solar ac-tivity and geomagnetic activity was negatively correlated according to the mean results of years’difference value.The period of Klobuchar model's precision is six-months and preci-sion of model is higher in January and July and lower in April and October according to the mean results of months’difference value.Precision of Klobuchar model presents roughly symmetrical distribution in north-south hemispheres with low precision in the low latitudes and comparatively high precision in the mid-high latitudes in the spatial distribution,in solar and geomagnetic activity calm year,model accuracy are similar on global scale.关键词
Klobuchar模型/GIM/电离层延迟/精度分析/TECKey words
Klobuchar model/GIM/ionospheric delay/precision analysis/TEC分类
天文与地球科学引用本文复制引用
林清莹,郭金运,闫金凤,沈毅,李旺..基于GIM的Klobuchar电离层模型的精度及影响因素分析[J].全球定位系统,2016,41(5):93-98,6.基金项目
国家自然科学基金(批准号:41374009) （批准号:41374009）
山东省自然科学基金(批准号:ZR2013DM009) （批准号:ZR2013DM009）
科技基础性工作专项(编号:2015FY310200) （编号:2015FY310200）
