大地测量与地球动力学2014，Vol.34Issue(6)：76-80,5.
GNSS掩星电离层的三频观测数据模拟与反演
SIMULATION AND INVERSION OF GNSS IONOSPHERIC OCCULTATION OBSERVATIONS——THREE FREQUENCY
摘要
Abstract
GNSS radio occultation technique has been proved to be an important method to investigate the ionospheric electron density in different levels.3D ray tracing is the best choice for analyzing the propagation of ray in ionosphere.A group of matrix equations from the differential equation in Cartesian coordinate was used to analyze the detail steps of ray tracing with the formulas.The NeQuick model is used to simulate the excess phase of L1,L2 and L5,and the simulated results are used to retrieval the electric density profile with absolute TEC inversion method with different band combination.The result of two numerical experiments shows that the combination Ll-L5 is the preferable choice for vertical density profiles inversion under the identical observation conditions.关键词
三频卫星信号/掩星仿真/电离层正演/绝对电子总量反演法/L1-L5组合Key words
tri-band GNSS / radio occultation simulation / forward propagation / absolute TEC inversion method / combination L1-L5分类
天文与地球科学引用本文复制引用
胡川,陈义..GNSS掩星电离层的三频观测数据模拟与反演[J].大地测量与地球动力学,2014,34(6):76-80,5.基金项目
国家自然科学基金项目(41074017). （41074017）
