| 顾及f~3项的电离层延迟模型 |
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| 引用本文： | 李征航, 陈锴, 刘万科, 黄欢. 顾及f~3项的电离层延迟模型[J]. 武汉大学学报 ( 信息科学版), 2007, 32(2): 139-143. |
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| 作者姓名： | 李征航 陈锴 刘万科 黄欢 |
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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 |
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| 基金项目： | 国家重点实验室基金;南极考察基础测绘资助项目 |
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| 摘 要： | 给出了顾及f3项时消除电离层延迟的两种方法:用三频观测值来消除电离层延迟,直接用地磁场模型来计算f3项。提出了一种用一个三次曲面来拟合30°×40°的区域内的场强H的简化算法。用两种方法求得的电离层延迟之差小于0.5 mm。
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| 关 键 词： | 电离层延迟 三频改正 球谐函数 曲面拟合 格网点 |
| 文章编号： | 1671-8860(2007)02-0139-05 |
| 收稿时间： | 2006-11-07 |
| 修稿时间： | 2006-11-07 |
Ionospheric Delay Model Containing f3 Term |
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| LI Zhenghang, CHEN Kai, LIU Wanke, HUANG Huan. Ionospheric Delay Model Containing f~3 Term[J]. Geomatics and Information Science of Wuhan University, 2007, 32(2): 139-143. |
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| Authors: | LI Zhenghang CHEN Kai LIU Wanke HUANG Huan |
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| Affiliation: | 1 School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China |
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| Abstract: | Two methods to eliminate the ionospheric delay containingf3term are given.The first method is to eliminate ionospheric delay with triple-frequency observations.The second method is directly calculate thef3term.A simplified method is proposed that a three order polynomials is used to fit the geomagnetic field intensity of a 30°×40°area,which can achieve a rather good result.By comparison,the difference of the ionospheric delay between the calculated results by the two methods is less than 0.5 mm. |
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| Keywords: | innospheric delay correction with triple-frequency observations spherical har-monics surface fitting grid point |
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