Lower ionosphere electron concentration and collision frequency from rocket measurements of Faraday rotation, differential absorption, and probe current
Lower ionosphere electron concentration and collision frequency from rocket measurements of Faraday rotation, differential absorption, and probe current
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法拉第旋转、差分吸收和探测电流的火箭测量降低了电离层电子浓度和碰撞频率
DOI：
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发表时间：
1967
期刊：
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通讯作者：
H. Knoebel
中科院分区：
文献类型：
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作者：
E. A. Mechtly;S. Bowhill;L. Smith;H. Knoebel
在一种新型的无线电传播实验中，两种磁离子模式的无线电波从一对地面发射器辐射到耐克阿帕奇火箭。火箭的功率比为10db，由包括发射机、火箭载接收机和遥测系统在内的伺服回路维持。两种模式的频率由频率相差500赫兹的晶体控制。中心频率是3385千赫。这项技术便于电离层法拉第旋转和差分吸收的测量，校准良好的仪器设在地面上。基于广义磁离子理论，提出了一种分析法拉第和吸收数据的方法，并将其应用于火箭数据中，以获得电子浓度和碰撞频率，并校准了测量电子浓度谱精细结构的朗缪尔型电子电流探头。图中显示了一次典型飞行的结果，其中在55-105公里高度范围内确定了电子浓度，在85-105公里范围内确定了碰撞频率。
In a new type of radio propagation experiment, radio waves of both magnetoionic modes are radiated from a pair of ground-based transmitters to a Nike Apache rocket. A power ratio of 10 db at the rocket is maintained by a servoloop that includes the transmitters, the rocket-borne receiver, and the telemetry system. The frequencies of the two modes are controlled by crystals that differ in frequency by 500 hz. The central frequency is 3385 khz. This technique facilitates measurement of ionospheric Faraday rotation and differential absorption by well-calibrated instrumentation located on the ground. A method of analyzing Faraday and absorption data, based on the generalized magnetoionic theory, is developed and applied to rocket data to obtain electron concentration and collision frequency, and to calibrate a Langmuir-type electron current probe that measures the fine structure of the electron concentration profile. Results of a typical flight are shown in which electron concentrations are determined in the altitude range 55–105 km and collision frequencies in the range 85–105 km.