大气扰动对深空通信天线组阵性能的影响

发布时间：2018-04-11 08:54

本文选题：大气结构常数 + 大气扰动　；参考：《电波科学学报》2016年06期

【摘要】：利用单站GNSS精密单点定位原理(Precise Point Positioning,PPP)解算天顶方向的对流层大气天顶延迟,并对其一天内的变化进行统计平均,结合经典的Kolmogorov-Obukhov“2/3”扰动理论和随机场理论,基于对流层天顶延迟与大气折射率的时变相关性获得大气结构常数C_n,并分析了不同大气扰动强度下的二元天线阵大气相位误差.通过计算我国北京、上海、昆明、乌鲁木齐四个甚长基线干涉测量(Very Long Baseline Interferometry,VLBI)深空站处不同时间的C~2_n,评估各站点大气环境的扰动特性对X/Ka频段天线阵系统工作性能的影响,统计结果表明:除了北京、乌鲁木齐站在1月份的相位误差相对较小外,各站其他时间在Ka频段的相位误差大多数达到25°以上,北京的7月和上海的4月甚至高达50°以上,会严重降低天线阵信噪比合成性能,影响地面站与深空探测器之间的大容量通信.
[Abstract]:The tropospheric zenith delay in the zenith direction is calculated by using the principle of precise single point positioning of single station GNSS. The variation of the troposphere in the zigzag direction is statistically averaged, combined with the classical Kolmogorov-Obukhov "2 / 3" perturbation theory and random field theory.Based on the time-varying correlation between tropospheric zenith delay and atmospheric refractive index, the atmospheric structure constant C _ S _ n is obtained, and the atmospheric phase error of binary antenna array under different intensity of atmospheric disturbance is analyzed.By calculating four very long baseline interferometric measurements in Beijing, Shanghai, Kunming and Urumqi at different times at very Long Baseline interferometric VLBI, the effects of atmospheric environment disturbance characteristics on the performance of X/Ka antenna array system are evaluated.The results show that except for Beijing, the phase error of Urumqi station in January is relatively small, most of the phase errors in Ka-band are above 25 掳at other time, and even more than 50 掳in July in Beijing and April in Shanghai.The signal-to-noise ratio (SNR) synthesis performance of antenna array will be seriously reduced, and the large capacity communication between earth station and deep space detector will be affected.
【作者单位】：中国电波传播研究所;
【分类号】：TN011.3

【相似文献】