王世凯,李星,王俊江,等. 电离层等离子体漂移测量技术研究[J]. 电波科学学报,2023,38(4):698-704. DOI: 10.12265/j.cjors.2023036
      引用本文: 王世凯,李星,王俊江,等. 电离层等离子体漂移测量技术研究[J]. 电波科学学报,2023,38(4):698-704. DOI: 10.12265/j.cjors.2023036
      WANG S K, LI X, WANG J J, et al. Study on ionospheric plasma drift measurement technology[J]. Chinese journal of radio science,2023,38(4):698-704. (in Chinese). DOI: 10.12265/j.cjors.2023036
      Citation: WANG S K, LI X, WANG J J, et al. Study on ionospheric plasma drift measurement technology[J]. Chinese journal of radio science,2023,38(4):698-704. (in Chinese). DOI: 10.12265/j.cjors.2023036

      电离层等离子体漂移测量技术研究

      Study on ionospheric plasma drift measurement technology

      • 摘要: 针对等离子体漂移测量技术中干涉仪测向存在相位模糊、短波干扰导致测向误差等问题,改进了基于相控阵电离层垂直探测的等离子体漂移测量技术。采用波束合成测向方法,利用二维搜索方法确定最大峰值信号对应的方位角和天顶角(此即为信号实际来波方向),提升回波方向测量的稳健性;采用时间内插技术提升定频探测频率个数的同时缩短定频探测时间,增加有效等离子体反射回波点数;针对同频干扰和“条状”干扰,采用干扰避让技术,确保受干扰的信号不参与后续测向处理,同时采用多普勒域能量曲线来确定有效回波的高度范围,提升等离子体回波速度估计的准确性。与海南富克站部署的DPS-4D电离层测高仪实测结果对比验证了本文所提方法的有效性.

         

        Abstract: The ionospheric plasma drift measurement technique based on the vertical detection of the phased array ionosphere is improved to address the problems of phase ambiguity and directional errors caused by short-wave interference in the interferometer directional measurement in the plasma drift measurement technique. The beamforming direction finding method is used to determine the azimuth and zenith angle of the maximum peak signal, which is the actual direction of the incoming signal, to improve the robustness of the echo direction measurement. The time interpolation technique is used to increase the number of fixed frequency detection frequencies while shortening the fixed frequency detection time to increase the number of effective plasma reflection echoes. For the same frequency interference and "strip" interference, the interference avoidance technology is used to ensure that the disturbed signal does not participate in the subsequent directional processing, while the Doppler domain energy curve is used to determine the height range of the effective echoes and improve the accuracy of the plasma echo velocity estimation. The comparison with the measured results of DPS-4D ionosonde in Hainan verifies the progressiveness of the proposed method.

         

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