Stimulated electromagnetic emissions spectrum observed during an X-mode heating experiment at the European Incoherent Scatter Scientific Association  

作　　者：Xiang Wang Chen Zhou Tong Xu Farideh Honary Michael Rietveld Vladimir Frolov 

机构地区：[1]Department of Space Physics,School of Electronic Information,Wuhan University,Wuhan 430072,China [2]National Key Laboratory of Electromagnetic Environment,China Research Institute of Radiowave Propagation,Qingdao 266107,China [3]Department of Physics,Lancaster University,Lancaster LA1 4YB,UK [4]EISCAT Scientific Association,N-9027 Ramfjordmoen,Norway [5]Institute for Physics and Technology,UiT The Arctic University of Norway,N-9037,Tromsφ,Norway [6]Radiophysical Research Institute,Nizhny Novgorod 603600,Russia [7]Kazan Federal University,Kazan 420008,Russia

出　　处：《Earth and Planetary Physics》2019年第5期391-399,共9页地球与行星物理（英文版）

基　　金：supported by the National Natural Science Foundation of China(grant numbers 41204111,41574146,41774162,and 41704155);the China Postdoctoral Science Foundation(grant numbers 2017M622504 and2019T120679);supported through the Russian Education Ministry(project number3.1844.2017)

摘　　要：An extraordinary(X-mode)electromagnetic wave,injected into the ionosphere by the ground-based heating facility at Tromsφ,Norway,was utilized to modify the ionosphere on November 6,2017.The high-power high-frequency transmitter facility located at Tromsφ belongs to the European Incoherent Scatter Scientific Association.In the experiment,stimulated electromagnetic emission(SEE)spectra were observed.A narrow continuum occurred under cold-start conditions and showed an overshoot effect lasting several seconds.Cascading peaks occurred on both sides of the heating frequency only in the preconditioned ionosphere and also showed an overshoot effect.These SEE features are probably related to the ponderomotive process in the X-mode heating experiment and are helpful for understanding the physical mechanism that generated them during the X-mode heating experiment.The features observed in the X-mode heating experiments are novel and require further investigation.An extraordinary(X-mode) electromagnetic wave, injected into the ionosphere by the ground-based heating facility at Troms?,Norway, was utilized to modify the ionosphere on November 6, 2017. The high-power high-frequency transmitter facility located at Troms? belongs to the European Incoherent Scatter Scientific Association. In the experiment, stimulated electromagnetic emission(SEE)spectra were observed. A narrow continuum occurred under cold-start conditions and showed an overshoot effect lasting several seconds. Cascading peaks occurred on both sides of the heating frequency only in the preconditioned ionosphere and also showed an overshoot effect. These SEE features are probably related to the ponderomotive process in the X-mode heating experiment and are helpful for understanding the physical mechanism that generated them during the X-mode heating experiment. The features observed in the X-mode heating experiments are novel and require further investigation.

关 键 词：artificial ionosphere modification stimulated electromagnetic emissions extraordinary electromagnetic wave European Incoherent Scatter Scientific Association(EISCAT) 

分 类 号：P[天文地球]