GPS测量误差对大气掩星反演精度影响分析
文献类型：期刊论文
| 作者 | 宫晓艳 ; 胡雄 ; 吴小成 ; 王鑫 ; 肖存英 ; 徐丽 |
| 刊名 | 地球物理学进展
 |
| 出版日期 | 2008 |
| 卷号 | 23期号:6页码:1764-1781 |
| 关键词 | 大气掩星 测量误差 位置误差 速度误差 钟漂 载波相位观测误差 反演精度 GPS |
| ISSN号 | 1004-2903 |
| 通讯作者 | 北京8701信箱 |
| 中文摘要 | 在无线电GPS大气掩星观测中,GPS和LEO卫星的位置误差,速度误差,卫星钟的漂移,载波相位观测误差等会给其反演的大气参量带来一定的误差.为定量分析上述GPS测量误差对大气掩星反演精度的影响,本文采用模拟分析的方法,利用CHAMP实测轨道数据和大气与电离层经验模式,采用三维射线追踪方法模拟得到大气附加相位观测数据;然后根据各种GPS测量误差的不同性质,在模拟掩星观测大气附加相位数据中加入GPS测量误差并进行反演,将其反演结果与未加入误差时的反演结果进行比较,分析各测量误差所带来的掩星反演误差的特点;利用一天的151个分布全球的掩星事件的误差结果进行统计分析.结果表明:(1)±10 m的... |
| 英文摘要 | In obserations of the Earth’s atmosphere with the GPS radio occultation technique,some factors such as the position error of GPS and L EO satellite,velocity error,clock drif t,and observation error of carrier wave can bring error to the ret rieval atmospheric parameters.In this paper,we analyze quantificationally the effects of the GPS measurement errors on the precision of ret rieval.The excess phase delay is simulated by using the CHAMP orbit data,the experiential atmospheric and ionospheric model,and the method of 3D2t racing technology,Af ter that,according to different characteristics of several GPS measurement errors , we add the GPS measurement errors to the simulated atmospheric excess phase data,and then ret rieve the atmospheric parameters. It is analyzed of the inversion error caused by GPS measurement errors by comparison between inversion result s and inversion result s before adding errors. We analyzed statistically the error using 151 occultation event s’error result of one day also. The conclusions are as follows:(1) When the GPS radial position error is ±10m,the mean temperature error at 30 km is º 0.8K,and the standard deviation of temperature error at 30 km is 0. 05K. When the L EO position error is ±0. 4m,the average temperature error at 30 km is about º 1.2 K,and the standard deviation of temperature error at 30 km is 0.07K.(2)When the GPS velocity error is ±30 m/s,the maximum mean temperature error is ±0. 02 K, and the maximum standard deviation of temperature error is 0.3K. When the L EO position error is ±10 m/ s , the maximum mean tem2 perature error is about ±0.4K, and the maximum standard deviation of temperature error is 0. 06 K. (3) When the satellite receiver’s clock drift is 1 ×10 - 9,the mean temperature error at 30 km is 263K, and the standard deviation of temperature error at 30 km is 16K. When the satellite receiver’s clock drif t is 1 ×10 - 14 , the mean temperature error at 30 km is 0. 019K, and the standard deviation of temperature error at 30 km is 0. 004K. (4) When observation errors for carrier waves of L1 and L2 are 1mm and 2mm,they will result in the mean temperature error at 30 km is 0.01K, and the standard deviation of temperature error is 0.4K.(5) When using the MSIS90 atmospheric model of three dimension and NeUo G ionospheric model in simulation , and adding all of the GPS measurement errors of the most advanced index to the simulated atmospheric excess phase data , the error analysis result s is that the ret rieval ref ractivity and density error is less than 0.3 %(1σ) below 30 km , the pressure error is less than 0. 5 %(1σ) ,and the temperature error is less than 1K (1σ). |
| 学科主题 | 空间环境 |
| 收录类别 | CSCD |
| 资助信息 | 自然科学基金,中国科学院知识创新方向性项目和863 航天高科技领域课题联合资助. |
| 语种 | 中文 |
| CSCD记录号 | CSCD:3460687 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/386]  |
| 专题 | 国家空间科学中心_空间环境部 |
| 推荐引用方式 GB/T 7714 | 宫晓艳,胡雄,吴小成,等. GPS测量误差对大气掩星反演精度影响分析[J]. 地球物理学进展,2008,23(6):1764-1781. |
| APA | 宫晓艳,胡雄,吴小成,王鑫,肖存英,&徐丽.(2008).GPS测量误差对大气掩星反演精度影响分析.地球物理学进展,23(6),1764-1781. |
| MLA | 宫晓艳,et al."GPS测量误差对大气掩星反演精度影响分析".地球物理学进展 23.6(2008):1764-1781. |
入库方式： OAI收割
来源：国家空间科学中心
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