唐新杰,刘默然,乔建东,等. 空间目标监视雷达大气折射修正技术研究[J]. 电波科学学报,2024,39(1):148-155. DOI: 10.12265/j.cjors.2023006
      引用本文: 唐新杰,刘默然,乔建东,等. 空间目标监视雷达大气折射修正技术研究[J]. 电波科学学报,2024,39(1):148-155. DOI: 10.12265/j.cjors.2023006
      TANG X J, LIU M R, QIAO J D, et al. Atmospheric refraction correction technology for space target surveillance radar[J]. Chinese journal of radio science,2024,39(1):148-155. (in Chinese). DOI: 10.12265/j.cjors.2023006
      Citation: TANG X J, LIU M R, QIAO J D, et al. Atmospheric refraction correction technology for space target surveillance radar[J]. Chinese journal of radio science,2024,39(1):148-155. (in Chinese). DOI: 10.12265/j.cjors.2023006

      空间目标监视雷达大气折射修正技术研究

      Atmospheric refraction correction technology for space target surveillance radar

      • 摘要: 无线电波在大气层中传播时,大气介质的不均匀分布会对电波产生折射效应,从而影响雷达的探测精度。对于航天目标的雷达探测,影响无线电波的介质主要是电离层。本文利用实时TEC数据同化的方式,建立了电离层电子密度现报模型,实现了电离层折射率剖面的实时构建。在此基础上,利用射线描迹法完成了航天目标雷达探测的折射误差修正。结果表明,相对于单纯使用电离层经验模型−国际参考电离层(International Reference Ionosphere, IRI)模型,利用电离层同化现报模型建立的电离层折射率剖面可大大提高折射误差修正的精度。

         

        Abstract: Owing to the inhomogeneous distribution of the atmospheric medium, there exists a refraction effect on the radio waves propagating in the atmosphere, which will reduce the detection accuracy of radar. The radar detection of space targets is affected mainly by the ionosphere. In this paper, a now-casting model of the ionospheric refractivity profile is developed by using TEC data assimilation, and the real-time construction of the ionospheric refractivity profile is accomplished. On this basis, the refraction error correction of the space target is completed by using the ray tracing method. The results show that compared with the International Reference Ionosphere (IRI) model, the ionospheric refractivity profile established by the ionospheric assimilation now-casting model significantly improves the accuracy of the refraction error correction.

         

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