区域电离层GPS双频改正模型研究

通过电离层延迟改正模型推导及对电离层延迟改正的主要因素的阐述,提出曲面拟合、距离加权和多面函数法3种区域电离层改正拟合模型,得出一定区域内的每个测站用双频改正模型求出电离层改正值,然后用曲面拟合法对整个区域进行拟合,得出区域改正模型。

Firstly, the ionosphere delay correction model was derived and the main factors of ionosphere delay correction were expounded. Then the surta.ce fitting, weighted distance function and muhi-faceted three regional fitting ionospheric correction model were given. Moreover, the ionosphere correction value was obtained with using dual-frequency ionospheric correetion model in each stations of certain region. Then surface fitting method was fit the entire region. Finally, the region correction model was educed.