【摘要】 根据中国地形分布难以建立格网模型的特点,为了解决我国区域电离层精确改正的问题,提出了广域电离层改正三角分区的方法。选择中国地震电离层监测实验网中纬度地区的5个监测站,建立覆盖我国中纬度整个网络服务区域的三角分区电离层模型,并利用8个基准站的数据对该方法的修正精度进行评估,结果表明,对于三角分区内部区域,该方法可以修正到90%左右;对于三角分区外部几百公里以内的区域该方法也能达到80%以上的修正精度,同时利用原始GNSS数据对美国、加拿大等4个IGS跟踪站进行补充实验也验证了该方法的可行性,在保证模型精度的同时较格网法更加简单、有效,对广域电离层延迟误差的修正具有重要的参考价值。更多还原

【Abstract】 Because of the characteristics of its topographic distribution,it is hard for China to set up a Grid-based ionospheric correction model.In order to obtain accurate regional ionospheric correction,the wide area ionospheric correction triangular partition method is proposed.A triangular partition of the ionospheric delay model for mid-latitude in China was established using five ionosphere reference stations of the China seismo-ionospheric groundbase monitoring network.The precision of the method was examined by eight reference stations,the results show that,in the case of the existing network layout for the triangular partition of the internal area,ionospheric delay error can be improved to90%;For the external triangular partition,hundreds of kilometers from the area,this method can also achieve correction accuracy of more than 80%.At the same time,GNSS data from four IGS tracking stations in United States and Canada were used to test this method.The results also verify the feasibility of this method,with important reference value to the wide area single-frequency ionospheric delay error correction.更多还原