| 电离层延迟对分布式SAR编队相对定位的影响 |
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| 引用本文： | 谷德峰,涂先勤,易东云.电离层延迟对分布式SAR编队相对定位的影响[J].电波科学学报,2009,24(3). |
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| 作者姓名： | 谷德峰 涂先勤 易东云 |
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| 作者单位： | 1. 国防科技大学理学院,湖南,长沙,410073
2. 国防科技大学理学院,湖南,长沙,410073;91550部队,辽宁,大连,116023 |
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| 基金项目： | 国防预研项目，航天支撑技术基金 |
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| 摘 要： | 建立星载GPS单层电离层延迟模型,利用CHAMP卫星双频GPS观测资料确定的单层投影高度为580 km.仿真分析了电离层延迟对分布式SAR编队CDGPS(载波相位差分GPS)相对定位的影响,主要分析结果表明:在mm量级的星间相对定位中,电离层延迟影响不可被忽略;太阳活动对相对定位的影响显著,当星间距离取1 km,在太阳活动强年,由差分电离层延迟引起的相对定位误差达到8.5mm,是太阳活动弱年的2倍.
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| 关 键 词： | 分布式SAR 电离层延迟 相对定位 |
Influence of ionospheric path delay on distributed SAR satellite formation relative position determination |
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| GU De-feng,TU Xian-qin,YI Dong-yun.Influence of ionospheric path delay on distributed SAR satellite formation relative position determination[J].Chinese Journal of Radio Science,2009,24(3). |
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| Authors: | GU De-feng TU Xian-qin YI Dong-yun |
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| Affiliation: | GU De-feng1 TU Xian-qin1,2 YI Dong-yun1(1.College of science,National Univ.of Defense Technology,Changsha Hunan 410073,China,2.Unit 91550 of the Chinese People's Liberation Army,Dalian Liaoning 116023,China) |
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| Abstract: | Single-layer ionospheric path delay model for spaceborne GPS is established.By fitting the dual frequency GPS observations of CHAMP satellite,it is determined that the height of single-layer is 580 km.The influence of ionospheric delay to distributed SAR satellite formation CDGPS relative position determination is analyzed via simulation.The results show that the influence of differential ionospheric delay can not be ignored at level mm in inter-satellite relative position determination.Sun activity has sig... |
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| Keywords: | CDGPS |
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