基于电波折射的实时数字引导修正方法

Real-time Digital Guidance Correction Method based on Radio Wave Refraction

为了解决窄波束测控设备利用实时数字引导捕获目标成功率较低的问题,提出了一种在实时数字引导中引入电波折射修正的新方法,该方法以测控设备所在位置的实时大气参数为依据,计算出地面大气折射率,由此根据模型计算出俯仰角折射误差,最后用此误差来修正实时数引俯仰角,引导天线指向目标的视在位置。仿真和实验数据表明,本方法能够在数引状态下将设备天线引导至空间飞行目标的视在位置,将半功率波束宽度为0.2°的天线在俯仰为0.1°处的数引直接捕获目标概率由0.25提高到0.99。

In order to solve the problem that the success rate of narrow-beam TT&C equipment using real-digital guidance to capture targets is low,a new method of introducing radio wave refraction correction in real-time digital guidance is proposed.The method calculaties the ground atmosohericrefractice index based on the quasi-real-time atmospheric parameters at the location of the TT&C equipment,and then calculates the elecation refraction error according to the model.Finally,the error is used to correct the elecation angle of the real-time digital pilot and guide the antenna to point to the apparent position of the target.The simulation and experimental data show that this method can guide the equipment antenna to the apparent position of the space flying target in the state of digital pilot,and increase the probability of direct target acquisition from 0.25 to 0.99 for the antenna with half power beamwidth of 0.2°at pitch of 0.1°.