| 弱电离层组合SPP在极区定位效果分析 |
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| 引用本文： | 孔豫龙,柴洪洲,潘宗鹏,杨克凡,刘宸.弱电离层组合SPP在极区定位效果分析[J].测绘科学技术学报,2017(5):470-474. |
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| 作者姓名： | 孔豫龙 柴洪洲 潘宗鹏 杨克凡 刘宸 |
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| 作者单位： | 1. 信息工程大学,河南郑州,450001;2. 北京卫星导航中心,北京,100094 |
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| 基金项目： | 国家自然科学基金项目(41274045 |
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| 摘 要： | 研究了Klobuchar电离层改正模型和双频消电离层组合在伪距单点定位中的应用。通过实验验证了Klobuchar模型在极区的不适用性,并从理论上分析了消电离层组合在伪码噪声放大方面的缺点。针对消电离层组合中的不足,将噪声放大视为伪距定位中的主要矛盾。在降低伪距噪声和电离层延迟的不完全消除之间寻求平衡,提出了一种兼顾降噪与电离层改正的双频组合,称之为弱电离层组合。利用南极地区多个IGS跟踪站的多天数据,验证了弱电离层组合伪距单点定位相对于消电离层组合具有更好的定位效果,定位精度普遍可以提高15%~30%。不同测站对应的改善程度不尽相同,接收机内部因素造成的观测质量不佳也会使得定位精度改善不显著。
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| 关 键 词： | 电离层延迟 Klobuchar模型 消电离层组合 弱电离层组合 伪距单点定位 |
Analysis of SPP Result in Polar Regions Based on Iono-Weak Combination |
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| Abstract: | The Klobuchar model and dual-frequency iono-free combination are studied respectivily in the application of standard point positioning.The model is not applicable in polar regions,and the pseudo-code noise will be magnified in iono-free combination.In allusion to the disadvantage of iono-free combination,the magnified noise is treated as the principle error in SPP.The balance between the noise reduction and the incomplete elimination of ionospheric delay is finded.A new combination is proposed considering both the noise reduction and the ionopsheric correction,which is called iono-weak combination.By calculating several days raw observation data of IGS tracking stations in Antarctic,the result is concluded that the positioning result of iono-weak combination is better than iono-free combination and the positioning accuracy can be increased by 15％ ～ 30％ generally.The improvements of different stations are not the same,and the poor observations will also make the positioning accuracy improvement not significant. |
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| Keywords: | ionoshperic delay Klobuchar model iono-free combination iono-weak combination standard point positioning |
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