Frequency‐and‐angular HF sounding and ISR diagnostics of TIDs
Frequency‐and‐angular HF sounding and ISR diagnostics of TIDs
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TID 的频率和角度高频探测和 ISR 诊断
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
P. Erickson
中科院分区：
文献类型：
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作者：
V. Galushko;V. S. Beley;A. Koloskov;Y. Yampolski;V. Paznukhov;B. Reinisch;J. Foster;P. Erickson
作为来自广播站的电离层高频信号接收器的单个数字探空仪能够利用频移和到达角测量确定行进电离层干扰的波特征。2001年3月，在麻省理工学院干草堆天文台(马萨诸塞州米尔斯顿山)的一次旨在恢复高层大气中大范围波动过程的测量活动中，数字探空仪(DPS)与非相干散射雷达(ISR)进行了同步观测。对DPS进行了升级，纳入了以前在乌克兰哈尔科夫射电天文研究所开发的用于TID诊断的频率和角度探测(FAS)技术。具有四个间隔接收天线的DPS分别以3.33兆赫兹和7.335兆赫的频率接收来自加拿大时间服务中心(渥太华，安大略省)的无线电信号。Fas技术通过将电离层模拟为一个完全反射的表面，恢复了TID的基本参数，即传播矢量的幅度、速度和方向。在战役期间的三天里，米尔斯通山ISR使用三角测量模式监测电离层中点，以确定波状电离层扰动的运动方向和速度。两种诊断技术的结果比较显示出很好的一致性。波向为10~15度，波速和波长为10~12%。
A single digisonde, used as a receiver for ionospheric high frequency signals from broadcast stations, was able to determine the wave characteristics of traveling ionospheric disturbances (TIDs) using frequency shift and arrival angle measurements. During a measurement campaign, aimed at recovering large‐scale wave‐like processes in the upper atmosphere, in March 2001 at the MIT Haystack Observatory (Millstone Hill, MA), a Digisonde Portable Sounder (DPS) made simultaneous observations with the incoherent scatter radar (ISR). The DPS was upgraded to include the frequency and angular sounding (FAS) technique previously developed at the Institute of Radio Astronomy in Kharkov, Ukraine, for TID diagnostics. The DPS with four spaced receive antennas received the radio signals at 3.33 MHz and 7.335 MHz from Radio CHU of the Canadian Time Service (Ottawa, Ontario). The FAS technique recovered the basic parameters of TIDs, i.e., amplitude, speed, and the direction of the propagation vector by modeling the ionosphere as a perfectly reflecting surface. For three days during the campaign the Millstone Hill ISR monitored the ionospheric midpoint using a triangulation mode to identify the direction of motion and speed of the wave‐like ionospheric disturbances. Comparison of the results from the two diagnostic techniques showed good agreement. The wave directions were within 10 to 15 degrees, and speed and wavelength were within 10 to 12%.