极地研究2016，Vol.28Issue(2)：235-242,8.DOI:10.13679/j.jdyj.2016.2.235
GNSS 广播电离层模型在极区的改正效果分析
ANALYSIS OF GLOBAL NAVIGATION SATELLITE SYSTEM BROADCAST IONOSPHERIC MODEL CORRECTION IN POLAR REGIONS
摘要
Abstract
Time delay in the ionosphere is a major source of error in the Global Navigation Satellite System (GNSS).In particular,the ionosphere in polar regions is quite changeable,resulting in low precision of GNSS positioning. Therefore,an appropriate broadcast ionospheric model is needed for the polar regions.In this paper,vertical total electron content data,derived from the GIMmodel,are regarded as the true value,and the effects of three correc-tion models (the GPS-Klobuchar model,the BDS-Klobuchar model and the NeQuick model)on the ionospheric de-lay of positioning accuracy were compared and analyzed.In the polar regions north of 57.5°N and south of 57.5°S, the GPS-Klobuchar model performed less well and even had a negative effect in some cases.The BDS-Klobuchar model is totally unusable in the polar regions.The NeQuick model is better than Klobuchar model,but performed worse at high latitudes than at middle and low latitudes,with a correction rate of about 40%.关键词
Klobuchar模型/NeQuick模型/GIM模型/总电子含量/极区Key words
Klobuchar model/NeQuick model/GIMmodel/TEC/polar引用本文复制引用
王泽民,毕通,孙伟,安家春,刘树纶..GNSS 广播电离层模型在极区的改正效果分析[J].极地研究,2016,28(2):235-242,8.基金项目
国家自然科学基金（41174029，41204028，41231064）、国家海洋局“南北极环境综合考察与评估”专项（CHINARE2015-02-02）、中央高校基本科研业务费专项（2042015gf0001）资助 （）
