Inversion of Disturbed Electron Temperature by Anomalous Incoherent Scatter Spectra with Pure-growth Mode Line
LI Haiying① KONG Pengfei① XU Bin② WU Zhensen①
①(School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China) ②(National Key Laboratory of Electromagnetic Environment, China Research Institute of Radio Wave Propagation, Qingdao 266107, China)
Abstract：In the fitting process of the incoherent scatter power spectra with pure-growth mode line and the inversion of the disturbed ionospheric parameters, the GUISDAP package which is based on the equilibrium incoherent scatter theory, always exits serious error. Assuming the ionospheric parameters at heating-off time as a priori information, by using the least squares method to search the best Gaussian peak for the modification of the measured incoherent scatter spectra, one method is provided to obtain the disturbed electron temperature through fitting the modified measured spectra by taking advantage of the incoherent scatter theory of electron super-Gaussian distribution. This method is used to the ionospheric heating experimental data which is conducted in Norway in the autumn of 2010, and the results indicate that the electron temperature obtained by fitting the modified spectra is about 800 K higher than that of the heating off time, and the increase ratio is about 13%~50%, which is well coincided with the electron temperature increase range of ionospheric heating reported in the existing literature. The conclusion shows that the method is applicable to the inversion of disturbed ionospheric parameters by using of the incoherent scatter spectra with pure-growth mode line.
李海英,孔鹏飞,徐彬,吴振森. 利用含纯增长模式线的异常非相干散射谱反演扰动电子温度[J]. 电子与信息学报, 2018, 40(6): 1499-1504.
LI Haiying, KONG Pengfei, XU Bin, WU Zhensen. Inversion of Disturbed Electron Temperature by Anomalous Incoherent Scatter Spectra with Pure-growth Mode Line. JEIT, 2018, 40(6): 1499-1504.
YANG Jutao, LI Qingliang, WANG Jianguo, et al. Theory of very low frequency/extra low frequency radiation by dual- beam beat wave heating ionosphere[J]. Acta Physica Sinica, 2017, 66(1): 348-356. doi: 10.7498/aps.66.019401.
ZHAO Haisheng, XU Zhengwen, WU Zhensen, et al. A three- dimensional refined modeling for the effects of SF6 release in ionosphere[J]. Acta Physica Sinica, 2016, 65(20): 209401. doi: 10.7498/aps.65.209401.
DING Zonghua, WU Jian, XU Zhengwen, et al. The application prospect of the ionospheric incoherent scatter measurement[J]. Chinese Journal of Radio Science, 2016, 31(1): 193-198. doi: 10.13443/j/cjors.2015030201.
[4]
WANNBERG G, WOLF I, VANHAINEN L G, et al. The EISCAT Svalbard radar: A case study in modern incoherent scatter radar system design[J]. Radio Science, 1997, 32(6): 2283-2307. doi: 10.1029/97RS01803.
[5]
LEHTINEN M S and HUUSKONEN A. General incoherent scatter analysis and GUISDAP[J]. Journal of Atmospheric and Terrestrial Physics, 1996, 58: 435-452. doi: 10.1016/ 0021-9169(95)00047-X.
[6]
STUBBE P, KOHL H, and RIETVELD M T. Langmuir turbulence and ionospheric modification[J]. Journal of Geophysical Research: Space Physics, 1992, 97: 6285-6297. doi: 10.1029/91JA03047.
[7]
KOHL H and RIETVELD M T. Harmonics of the ion acoustic frequency in the heater induced ion spectrum[J]. Journal of Geophysical Research: Space Physics, 1996, 101(A3): 5391-5395. doi: 10.1029/95JA03342.
[8]
RIETVELD M T, ISHAM B, KOHL H, et al. Measurements of HF-enhanced plasma and ion lines at EISCAT with high-altitude resolution[J]. Journal of Geophysical Research: Space Physics, 2000, 105: 7429-7439. doi: 10.1029/1999JA 900476.
[9]
CHENG Musong, XU Bin, WU Zhensen, et al. Observation of VHF incoherent scatter spectra disturbed by HF heating [J]. Journal of Atmospheric and Solar-Terrestrial Physics, 2013, 105: 245-252. doi: 10.1016/j.jastp.2013.08.010.
CHENG Musong, XU Bin, WU Zhensen, et al. A large increase of electron density in ionospheric heating experiment [J]. Chinese Journal of Geophysics, 2014, 57(11): 3633-3641. doi: 10.6038/cjg20141117.
[11]
EKEBERG J, STASIEWICZ K, WANNBERG G, et al. Incoherent scatter ion line enhancements and auroral arc-induced Kelvin-Helmholtz turbulence[J]. Journal of Atmospheric and Solar-Terrestrial Physics, 2015, 122: 119-128. doi: 10.1016/j.jastp.2014.10.018.
[12]
KUO S P. Ionospheric modifications in high frequency heating experiments[J]. Physics of Plasmas, 2015, 22: 012901. doi: 10.1063/1.4905519.
[13]
GUREVICH A V, HAGFORS T, CARLSON H, et al. Electron temperature measurements by incoherent scattering in the presence of strong small scale temperature irregularities[J]. Physics Letters A, 1998, 246(3/4): 335-340. doi: 10.1016/S0375-9601(98)00422-8.
[14]
ASHRAFI M, KOSCH M J, and HONARY F. Heater- induced altitude descent of the EISCAT UHF ion line enhancements: Observations and modelling[J]. Advances in Space Research, 2006, 38(11): 2645-2652. doi: 10.1016/j.asr. 2005.06.079.
[15]
ZHENG Jian, YU C X, and ZHENG Z J. Effects of non- Maxwellian (super-Gaussian) electron velocity distribution on the spectrum of Thomson scattering[J]. Physics of Plasmas, 1997, 4(7): 2736-2740. doi: 10.1063/1.872141.
XU Bin, WU Zhensen, WU Jian, et al. Inversion of incoherent scatter spectra during ionosphere heating[J]. Chinese Journal of Radio Science, 2008, 23(4): 713-716. doi: 10.13443/j.cjors. 2008.04.020.
[17]
XU Bin, WANG Zhange, XUE Kun, et al. The inversion of incoherent scatter spectra with a non-Maxwellian electron distribution[J]. Journal of Atmospheric and Solar-Terrestrial Physics, 2010, 72(5): 492-497. doi: 10.1016/j.jastp.2010.01. 006.
[18]
WU Lili, ZHOU Qinghou, CHEN Tiejun, et al. Application of particle swarm optimization method to incoherent scatter radar measurement of ionosphere parameters[J]. Journal of Geophysical Research: Space Physics, 2015, 120(9): 8096-8110. doi: 10.1002/2014JA020970.
[19]
VIIRTANEN I I, MCKAY-BUKOWSKI D, VIERINEN J, et al. Plasma parameter estimation from multistatic, multibeam incoherent scatter data[J]. Journal of Geophysical Research: Space Physics, 2014, 119(12): 10528-10543. doi: 10.1002/ 2014JA020540.
CHENG Musong, XU Bin, WU Zhensen, et al. Inversion of ambient electron density for the modified ionosphere from HF pumping induced plasma cascade lines[J]. Chinese Journal of Radio Science, 2015, 30(3): 463-469. doi: 10.13443/j.cjors. 2014072401.
[21]
VICKERS H, ROBINSON T, and MCCREA I W. A method for improving plasma temperature estimates from incoherent scatter analysis during artificial ionospheric modification experiments[J]. Journal of Geophysical Research: Space Physics, 2010, 115: A11316. doi: 10.1029/2010JA015606.
WANG Chen, ZHOU Chen, ZHAO Zhengyu, et al. Theoretical analysis and numerical simulation of thermal self-focusing instability caused by powerful HF radio waves used in ionospheric heating experiments[J]. Chinese Journal of Geophysics, 2015, 58(6): 1853-1868. doi: 10.6038/ cjg20150602.
[23]
RIETVELD M T, KOSCH M J, BLAGOVESHCHENSKAYA N F, et al. Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence[J]. Journal of Geophysical Research, 2003, 108(A4): 1141. doi: 10.1029/2002JA009543.
[24]
HONARY F, STOCKER A J, ROBINSON T R, et al. EISCAT observations of electron temperature oscillations due to the action of high power HF radio waves[J]. Journal of Atmospheric and Solar-Terrestrial Physics, 1993, 55(10): 1433-1448. doi: 10.1016/0021-9169(93)90109-C.
