We present the results of comparing the total electron content measurements based on GLONASS satellite signals and the EISCAT UHF incoherent scatter radar (Tromsø, Norway) during modification of the high-latitude ionosphere in the magnetic zenith direction by high-frequency radio waves of the EISCAT/Heating facility (Tromsø, Norway). The measurements were performed during two experiment campaigns in October 2013 and in October 2018. In general, the total electron content variations obtained from the radar data in the altitude range 100–400 km were consistent with the total electron content variations from the GLONASS satellites. The efficiency of using GLONASS satellites for observations of high-latitude phenomena was shown. The anomalous increase in the total electron content by 4 TECU obtained from the incoherent scatter radar when the ionosphere was heated in the region close to the magnetic zenith is considered. The GLONASS satellite data show the total electron content reduction in the same region. To explain the disagreement between measurements by these two methods, the effect of smallscale electron-density irregularities arising in the region modified by high-power HF radio waves is considered. It is shown that when the electron density in artificial irregularities exceeds the background density of the medium by 2 ・ 10 −3 times in relative units, scattering by irregularities with spatial scales of the order of 16 cm becomes predominant in the reflected signal.

中文翻译：

---

利用无线电波非相干散射和Glonass卫星信号无线电探测方法测量高功率高频波干扰的电离层中的总电子含量

我们展示了基于 GLONASS 卫星信号和 EISCAT UHF 非相干散射雷达（挪威特罗姆瑟）在通过 EISCAT 的高频无线电波修改磁天顶方向的高纬度电离层期间比较总电子含量测量的结果/供暖设施（挪威特罗姆瑟）。这些测量是在 2013 年 10 月和 2018 年 10 月的两次实验活动中进行的。 一般来说，从 100-400 公里高度范围内的雷达数据获得的总电子含量变化与来自 GLONASS 卫星的总电子含量变化一致。显示了使用 GLONASS 卫星观测高纬度现象的效率。当电离层在靠近磁天顶的区域被加热时，从非相干散射雷达获得的总电子含量异常增加了 4 TECU。GLONASS 卫星数据显示同一地区的总电子含量减少。为了解释这两种方法测量之间的差异，考虑了在高功率 HF 无线电波修改的区域中出现的小尺度电子密度不规则的影响。结果表明，当人造不规则中的电子密度超过介质背景密度的2·10 -3 倍（相对单位）时，16 cm 量级空间尺度的不规则散射在反射信号中占主导地位。GLONASS 卫星数据显示同一地区的总电子含量减少。为了解释这两种方法测量之间的差异，考虑了在高功率 HF 无线电波修改的区域中出现的小尺度电子密度不规则的影响。结果表明，当人造不规则中的电子密度超过介质背景密度的2·10 -3 倍（相对单位）时，16 cm 量级空间尺度不规则的散射在反射信号中占主导地位。GLONASS 卫星数据显示同一地区的总电子含量减少。为了解释这两种方法测量之间的差异，考虑了在高功率 HF 无线电波修改的区域中出现的小尺度电子密度不规则的影响。结果表明，当人造不规则中的电子密度超过介质背景密度的2·10 -3 倍（相对单位）时，16 cm 量级空间尺度不规则的散射在反射信号中占主导地位。