| 适合随机电离层介质双频、双点互相干函数的解 |
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| 引用本文： | 李桂珍,吴健,黄际英,彭素琴. 适合随机电离层介质双频、双点互相干函数的解[J]. 电波科学学报, 2003, 18(2): 157-160,183 |
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| 作者姓名： | 李桂珍 吴健 黄际英 彭素琴 |
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| 作者单位： | 中国电波传播研究所,青岛分所,山东,青岛,266071 |
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| 基金项目： | 国家自然科学基金资助项目 ( 4990 45 5 ,698710 0 3 ) |
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| 摘 要： | 电离层是日地空间系统中一个非常复杂的非线性系统，不规则体的存在使得穿过其间的无线电信号到达时间为一随机量，它是影响GPS卫星定位精度主要误差源之一。利用双频、双点互相干函数的解析解能够较精确地算出卫星脉冲信号平均到达时间．本文在前向多重散射(M N)阶矩方程的基础上，利用微扰法导出2N阶对称矩的一般解，并得出能够用已知二阶矩表达的双频、双点互相干函数的解析解。
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| 关 键 词： | 电离层 前向多重散射 双频、双点互相干函数 解析解 随机介质波传播 |
| 文章编号： | 1005-0388(2003)02-0157-05 |
An analytic solution for the two-frequency and two-position mutual coherence function of wave propagation through random ionospheric media |
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| LI Gui-zhen WU Jian HUANG Ji-ying PENG Su-qin. An analytic solution for the two-frequency and two-position mutual coherence function of wave propagation through random ionospheric media[J]. Chinese Journal of Radio Science, 2003, 18(2): 157-160,183 |
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| Authors: | LI Gui-zhen WU Jian HUANG Ji-ying PENG Su-qin |
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| Abstract: | The ionosphere is a nonlinear complicated system in the solar-terrestrial space system, the arrival time of signals passing through the ionosphere is random variance resulting from the existence of the irregularities, which is one of the main sources degrading the accuracy of GPS. By means of the analytic expression of the two-frequency and two-position mutual coherence function, the average arrival time of signals passing through ionosphere can be calculated precisely. Based on the forward multiple scattering (M+N)th moment equation, a general solution of 2nth symmetric moment equation is derived in this paper. A two-frequency and two-position mutual coherence function is obtained by connecting the slight turbulent method with and the analytic solution. |
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| Keywords: | wave propagation through random media forward multiple scattering ionosphere |
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