| 卫星测高资料的电离层延迟改正交叉检验与误差分析 |
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| 引用本文： | 金涛勇,胡敏章,蒋涛,张守建.卫星测高资料的电离层延迟改正交叉检验与误差分析[J].武汉大学学报(信息科学版),2012,37(6):658-661. |
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| 作者姓名： | 金涛勇 胡敏章 蒋涛 张守建 |
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| 作者单位： | 1. 武汉大学测绘学院,武汉市珞喻路129号430079／武汉大学地球空间环境与大地测量教育部重点实验室,武汉市珞喻路129号430079
2. 武汉大学测绘学院,武汉市珞喻路129号,430079 |
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| 基金项目： | 国家863计划资助项目，国家自然科学基金资助项目，地球物理大地测量国家测绘地理信息局重点实验室开放基金资助项目 |
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| 摘 要： | 对单频和双频卫星测高电离层改正进行了分析和比较。以Topex卫星双频电离层改正噪声影响为例,采用沿轨高斯低通滤波后,其交叉点不符值RMS可减小5.7～7.3mm。将平滑后的双频Topex电离层改正与DORIS模型、新发展的IRI2007同化模型和根据全球连续GPS跟踪站实测数据建立的GIM模型进行了交叉比较,结果表明,根据实测数据建立的DORIS和GIM模型精度高于IRI2007模型;与上述3个模型的差值统计结果还显示了平滑后的Topex双频电离层改正存在的10～15mm的系统偏差。
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| 关 键 词： | 卫星测高 电离层 双频测高仪 GIM模型 IRI模型 |
Cross-Calibration and Errors Analysis of Ionosphere Correction in Satellite Altimetry |
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| JIN Taoyong,HU Minzhang,JIANG Tao,ZHANG Shoujian.Cross-Calibration and Errors Analysis of Ionosphere Correction in Satellite Altimetry[J].Geomatics and Information Science of Wuhan University,2012,37(6):658-661. |
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| Authors: | JIN Taoyong HU Minzhang JIANG Tao ZHANG Shoujian |
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| Institution: | 1(1 School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China)(2 Key Laboratory of Geospace Environment and Geodesy,Ministry of Education, Wuhan Unversity,129 Luoyu Road,Wuhan 430079,China) |
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| Abstract: | The single-and dual-frequency ionosphere corrections in satellite altimetry are analyzed in detail.Taking Topex dual-frequency ionosphere corrections as an example,RMS of cross-over difference can be reduced upto 5.7-7.3 mm by along-track filtering of low-pass Gauss.Then,the filtered Topex ionosphere corrections are cross-calibrated with DOIRS,IRI2007 and GIM models that are established by measurements of global continuous GPS tracking stations.The results show that the accuracy of DORIS and GIM is higher than that of IRI2007.The statistics of difference between the filtered Topex dual-frequency ionosphere correction and that from these models show a systematic bias of 10-15 mm. |
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| Keywords: | satellite altimetry ionosphere correction dual-frequency altimeter GIM IRI |
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