不稳定气流影响下多卫星抗干扰混合定位方法的研究  

Research on multi-satellite anti-interference hybrid positioning method under the influence of unstable airflow

作　　者：俞家融 沈超 刘星晔 林俊杰 杨静泊 徐晓伟 郑越峰 Yu Jiarong;Shen Chao;Liu Xingye;Lin Junjie;Yang Jingbo;Xu Xiaowei;Zheng Yuefeng(State Grid Wuxi Power Supply Company,Wuxi 214000,China;State Grid Siji Location Service Co.,Ltd,Beijing 102200,China)

机构地区：[1]国网江苏省电力有限公司无锡供电分公司,江苏无锡214000 [2]国网思极位置服务有限公司,北京102200

出　　处：《电子技术应用》2024年第12期117-124,共8页Application of Electronic Technique

基　　金：国网江苏省电力有限公司科技项目(J2023010)。

摘　　要：不稳定的气流会导致信号传播路径的扭曲和延迟变化,从而导致接收到的卫星信号的延迟和失真。这将导致定位系统的测距和寻向误差增大,影响定位结果的精度和准确性。因此,提出了一种新型的在不稳定气流影响下的多卫星抗干扰混合定位方法。对高空不稳定湍流数据进行预处理,快速验证湍流数据的真实性。基于动量守恒定律构建流场描述方程。通过运用载波相位观测和卫星天线相位中心坐标建立多卫星运动方程,并构建抗干扰混合定位模型。引入全球导航卫星系统(GNSS)技术,利用多颗卫星的信号来计算接收器的位置、速度和时间,从而解决多卫星混合抗干扰模型。实验结果表明,对于静态目标,该研究方法在目标方向N(北)、S(南)和E(东)的定位偏差较小;采用近地卫星、中等高度卫星和地球同步卫星混合定位时,定位误差的均方值始终低于0.002 cm。对于动态目标,该方法不受杂波干扰,能够稳定地定位目标。此外,所提出的方法具有更低的定位延迟和更高的定位效率。The unsteady airflow will cause the distortion and delay change of the signal propagation path,resulting in the delay and distortion of the received satellite signal.This will lead to increased ranging and direction finding errors in the positioning system,which will affect the precision and accuracy of the positioning results.Therefore,a new multi-satellite anti-interference hybrid positioning method under the influence of unstable airflow is studied.Preprocess the unstable turbulence data at high alti-tude,and verify the turbulence data authenticity quickly.The flow field description equation is constructed based on the momen-tum conservation theorem.The multi-satellite motion equation is established by using the carrier phase observations and satellite antenna phase center coordinates,and the anti-interference hybrid positioning model is constructed.Global Navigation Satellite System(GNSS)technology is introduced to solve the multi-satellite hybrid anti-interference model by using the signals of mul-tiple satellites to calculate the receiver's position,speed and time.The experimental results show that,for static targets,the re-search method has a small deviation in the positioning of the target N,S and E.When using the mixed positioning of near-earth satellite,medium altitude satellite and geosynchronous satellite,the mean square value of positioning error is always lower than O.o02 cm.For the dynamic target,the method is not disturbed by clutter,and the target is stably located.Moreover,the proposed method has lower localization delay and higher localization efficiency.

关 键 词：不稳定气流 卫星混合定位 数据验证 湍流方程 多卫星运动方程 

分 类 号：TN96[电子电信—信号与信息处理]