Experimental Study of HF Ionospheric Modification by Modulated Pump Waves

指向高层大气的高功率无线电波 电离层会产生成分的变化， 密度，光发射和其他无线电波在不同的 频率. 其中许多影响的原因仍然未知 以及对于给定的功率， 频率输入在理论上仍然无法解释。 这个项目 是对电离层改造的实验研究， 使用HF加热设备调制的高功率HF无线电波 阿雷西博的非相干散射雷达设施 波多黎各的天文台。 这些实验的目的 是研究对流加热和冷却的响应， 自然F区电离层，研究电子的变化， D和E区的电子密度，以分析 不稳定动态阈值和调查预测 磁场热自聚焦不稳定性 取向、泵浦功率、频率和电子温度

High powered radio waves directed to the upper atmosphere and ionosphere can produce changes in composition, electron density, optical emissions and other radio waves at various frequencies. The cause of many of these effects is still unknown and just what perturbation will occur for a given power and frequency input is still theoretically unexplained. This project is an experimental investigation of ionospheric modification by modulated high power HF radio waves using the HF heating facility and the incoherent scatter radar facility at the Arecibo Observatory in Puerto Rico. The objectives of these experiments are to study the convective heating and cooling response in the natural F-Region ionosphere, to study electron changes in the electron density in the D and E regions, to analyze for instability dynamic thresholds and to investigate predicted thermal self-focusing instability dependence on magnetic field orientation, pump power, frequency and electron temperature.fz