中国空间磁层线辐射现象探究
|
摘要
对2008—2010年覆盖中国空间的DEMETER卫星电场探测数据进行分析,共识别出328例磁层线辐射(MLR)事件。根据已有MLR事件的频谱特征,研究了中国空间的MLR事件的特征及其可能的原因。对所有MLR事件进行统计分析,结果表明这些事件白昼的出现率高于夜晚,秋冬季的出现率高于春夏季;与地磁活动水平无明显关联,主要出现在中国中低纬度地区空间;频率间隔主要分布在55~95 Hz,频率漂移速率大都在0~0.4 Hz/s,并且频谱最高强度与地理纬度无明确关联。中国空间MLR事件的特征与中国空间所观测到的电力线谐波辐射(PLHR)事件的特征相似,与国外已发现的MLR事件的特征有所不同。
The electric field data observed by DEMETER satellite in the space above China from 2008 to2010 were analyzed,and 328 magnetospheric line radiation( MLR) events were detected. According to the spectrum of the existing MLR events,the characteristics and their possible cause of these MLR events were studied. We made statistical analysis on all MLR events,and the results indicated that there were more MLR events in daytime than in nighttime and more in winter and autumn than in summer and spring. MLR showed no significant dependence on geomagnetic activity. Most of events were distributed in the low and medium latitude. The frequency intervals of MLR events were between 55 Hz and 95 Hz,the frequency drift rates were mostly in the range of 0-0. 4 Hz/s,and peak intensities in frequency-time spectrograms seemed to be independent of latitude. The characteristics of MLR events observed in the space above China were similar to those of power line harmonic radiation( PLHR) events,but different from those observed abroad.
The electric field data observed by DEMETER satellite in the space above China from 2008 to2010 were analyzed,and 328 magnetospheric line radiation( MLR) events were detected. According to the spectrum of the existing MLR events,the characteristics and their possible cause of these MLR events were studied. We made statistical analysis on all MLR events,and the results indicated that there were more MLR events in daytime than in nighttime and more in winter and autumn than in summer and spring. MLR showed no significant dependence on geomagnetic activity. Most of events were distributed in the low and medium latitude. The frequency intervals of MLR events were between 55 Hz and 95 Hz,the frequency drift rates were mostly in the range of 0-0. 4 Hz/s,and peak intensities in frequency-time spectrograms seemed to be independent of latitude. The characteristics of MLR events observed in the space above China were similar to those of power line harmonic radiation( PLHR) events,but different from those observed abroad.
引文
[1]孟伟,文俊,郑劲,等.高压直流输电线路对通信明线影响的仿真研究[J].电工技术学报,2008,23(6):103-108.MENG W,WEN J,ZHENG J,et al.Analysis and simulation of effects of HVDC transmission lines on telecommunication lines[J].Transactions of China Electrotechnical Society,2008,23(6):103-108(in Chinese).
[2]邬雄.特高压输电的电磁环境问题研究[J].电力系统通信,2006,27(6):1-5.WU X.Research on electromagnetic environment of ultra-high voltage grid[J].Telecommunications for Electric Power System,2006,27(6):1-5(in Chinese).
[3]吴静,付静静.地震电磁卫星监测输电线谐波辐射研究综述[J].地震学报,2011,33(6):828-836.WU J,FU J J.A review on power line harmonic radiation monitored by DEMETER satellite[J].Acta Seismologica Sinica,2011,33(6):828-836(in Chinese).
[4]WU J,ZHANG C,ZENG L,et al.Systematic investigation of power line harmonic radiation in near-earth space above China based on observed satellite data[J].Journal of Geophysical Research:Space Physics,2017,122(3):3448-3458.
[5]YEARBY K H.Magnetospheric VLF line radiation[D].Sheffield:University of Sheffield,1982.
[6]PARK C G,HELLIWELL R A.Magnetospheric effects of power line radiation[J].Science,1978,200(4343):727-730.
[7]BULLOUGH K,TATNALL A R L,DENBY M.Man-made e.l.f/v.l.f emissions and the radiation belts[J].Nature,1976,260(5550):401-403.
[8]PARROT M,ZASLAVSKI Y.Physical mechanisms of manmade influences on the magnetosphere[J].Surveys in Geophysics,1996,17(1):67-100.
[9]TATNALL A R L,MATTHEWS J P,BULLOUGH K,et al.Power line harmonic radiation and the electron slot[J].Space Science Review,1983,35(2):139-173.
[10]HELLIWELL R A,KATSUFRAKIS J P,BELL T F,et al.VLFline radiation in the earth’s magnetosphere and its association with power system radiation[J].Journal of Geophysical Research,1975,80(31):4249-4258.
[11]KOONS H C.Whistlers and whistler-stimulated emissions in the outer magnetosphere[J].Journal of Geophysical Research,1985,90(A9):8547-8551.
[12]PARROT M.Observations of power-line harmonic radiation by the low-altitude AUREOL-3 satellite[J].Journal of Geophysical Research,1994,99(A3):3961-3969.
[13]RODGER C J,THOMSON N R,DOWDEN R L.VLF line radiation observed by satellite[J].Journal of Geophysical Research,1995,100(A4):5681-5689.
[14]RODGER C J,CLILVERD M A,YEARBY K H,et al.Magnetospheric line radiation observations at Halley,Antarctica[J].Journal of Geophysical Research:Space Physics,1999,104(A8):17441-17447.
[15]RODGER C J,CLILVERD M A,YEARBY K H,et al.Is magnetospheric line radiation man-made?[J].Journal of Geophysical Research,2000,105(A7):15981-15990.
[16]MANNINEN J.Some aspects of ELF-VLF emissions in geophysical research[D].Oulu:University of Oulu,2005.
[17]PARROT M,MANNINEN J,SANTOLIK O,et al.Simultaneous observation on board a satellite and on the ground of large-scale magnetospheric line radiation[J].Geophysical Research Letters,2007,34(19):L19102.
[18]NEMEC F,SANTOLIK O,PARROT M,et al.Comparison of magnetospheric line radiation and power line harmonicradiation:A systematic survey using the DEMETER spacecraft[J].Journal of Geophysical Research:Space Physics,2007,112(A4):A04301.
[19]NEMEC F,PARROT M,SANTOLIK O,et al.Survey of magnetospheric line radiation events observed by the DEMETERspacecraft[J].Journal of Geophysical Research:Space Physics,2009,114(A5):A05203.
[20]PARROT M,NEMEC F.MLR events and associated triggered emissions observed by DEMETER[J].Advances in Space Research,2009,44(9):979-986.
[21]NEMEC F,PARROT M,SANTOLIK O.Influence of power line harmonic radiation on the VLF wave activity in the upper ionosphere:Is it capable to trigger new emissions?[J].Journal of Geophysical Research:Space Physics,2010,115(A11):A11301.
[22]NEMEC F,PARROT M,SANTOLIK O.Detailed properties of magnetospheric line radiation events observed by the DEME-TER spacecraft[J].Journal of Geophysical Research,2012,117(A5):A05210.
[23]PARROT M,NEMEC F,SANTOLIK O.Statistical analysis of VLF radio emissions triggered by power line harmonic radiation and observed by the low-altitude satellite DEMETER[J].Journal of Geophysical Research:Space Physics,2014,119(7):5744-5754.
[24]LAGOUTTE D,BROCHOT J Y,CARVALHO D,et al.The DE-METER science mission centre[J].Planetary and Space Science,2006,54(5):428-440.
[25]HELLIWELL R A.Whistlers and related ionospheric phenomena[D].Palo Alto:Stanford University,1965.
[26]RODGER C J,CLILVERD M A,YEARBY K H,et al.Temporal properties of magnetospheric line radiation[J].Journal of Geophysical Research,2000,105(A1):329-336.
[2]邬雄.特高压输电的电磁环境问题研究[J].电力系统通信,2006,27(6):1-5.WU X.Research on electromagnetic environment of ultra-high voltage grid[J].Telecommunications for Electric Power System,2006,27(6):1-5(in Chinese).
[3]吴静,付静静.地震电磁卫星监测输电线谐波辐射研究综述[J].地震学报,2011,33(6):828-836.WU J,FU J J.A review on power line harmonic radiation monitored by DEMETER satellite[J].Acta Seismologica Sinica,2011,33(6):828-836(in Chinese).
[4]WU J,ZHANG C,ZENG L,et al.Systematic investigation of power line harmonic radiation in near-earth space above China based on observed satellite data[J].Journal of Geophysical Research:Space Physics,2017,122(3):3448-3458.
[5]YEARBY K H.Magnetospheric VLF line radiation[D].Sheffield:University of Sheffield,1982.
[6]PARK C G,HELLIWELL R A.Magnetospheric effects of power line radiation[J].Science,1978,200(4343):727-730.
[7]BULLOUGH K,TATNALL A R L,DENBY M.Man-made e.l.f/v.l.f emissions and the radiation belts[J].Nature,1976,260(5550):401-403.
[8]PARROT M,ZASLAVSKI Y.Physical mechanisms of manmade influences on the magnetosphere[J].Surveys in Geophysics,1996,17(1):67-100.
[9]TATNALL A R L,MATTHEWS J P,BULLOUGH K,et al.Power line harmonic radiation and the electron slot[J].Space Science Review,1983,35(2):139-173.
[10]HELLIWELL R A,KATSUFRAKIS J P,BELL T F,et al.VLFline radiation in the earth’s magnetosphere and its association with power system radiation[J].Journal of Geophysical Research,1975,80(31):4249-4258.
[11]KOONS H C.Whistlers and whistler-stimulated emissions in the outer magnetosphere[J].Journal of Geophysical Research,1985,90(A9):8547-8551.
[12]PARROT M.Observations of power-line harmonic radiation by the low-altitude AUREOL-3 satellite[J].Journal of Geophysical Research,1994,99(A3):3961-3969.
[13]RODGER C J,THOMSON N R,DOWDEN R L.VLF line radiation observed by satellite[J].Journal of Geophysical Research,1995,100(A4):5681-5689.
[14]RODGER C J,CLILVERD M A,YEARBY K H,et al.Magnetospheric line radiation observations at Halley,Antarctica[J].Journal of Geophysical Research:Space Physics,1999,104(A8):17441-17447.
[15]RODGER C J,CLILVERD M A,YEARBY K H,et al.Is magnetospheric line radiation man-made?[J].Journal of Geophysical Research,2000,105(A7):15981-15990.
[16]MANNINEN J.Some aspects of ELF-VLF emissions in geophysical research[D].Oulu:University of Oulu,2005.
[17]PARROT M,MANNINEN J,SANTOLIK O,et al.Simultaneous observation on board a satellite and on the ground of large-scale magnetospheric line radiation[J].Geophysical Research Letters,2007,34(19):L19102.
[18]NEMEC F,SANTOLIK O,PARROT M,et al.Comparison of magnetospheric line radiation and power line harmonicradiation:A systematic survey using the DEMETER spacecraft[J].Journal of Geophysical Research:Space Physics,2007,112(A4):A04301.
[19]NEMEC F,PARROT M,SANTOLIK O,et al.Survey of magnetospheric line radiation events observed by the DEMETERspacecraft[J].Journal of Geophysical Research:Space Physics,2009,114(A5):A05203.
[20]PARROT M,NEMEC F.MLR events and associated triggered emissions observed by DEMETER[J].Advances in Space Research,2009,44(9):979-986.
[21]NEMEC F,PARROT M,SANTOLIK O.Influence of power line harmonic radiation on the VLF wave activity in the upper ionosphere:Is it capable to trigger new emissions?[J].Journal of Geophysical Research:Space Physics,2010,115(A11):A11301.
[22]NEMEC F,PARROT M,SANTOLIK O.Detailed properties of magnetospheric line radiation events observed by the DEME-TER spacecraft[J].Journal of Geophysical Research,2012,117(A5):A05210.
[23]PARROT M,NEMEC F,SANTOLIK O.Statistical analysis of VLF radio emissions triggered by power line harmonic radiation and observed by the low-altitude satellite DEMETER[J].Journal of Geophysical Research:Space Physics,2014,119(7):5744-5754.
[24]LAGOUTTE D,BROCHOT J Y,CARVALHO D,et al.The DE-METER science mission centre[J].Planetary and Space Science,2006,54(5):428-440.
[25]HELLIWELL R A.Whistlers and related ionospheric phenomena[D].Palo Alto:Stanford University,1965.
[26]RODGER C J,CLILVERD M A,YEARBY K H,et al.Temporal properties of magnetospheric line radiation[J].Journal of Geophysical Research,2000,105(A1):329-336.