基于El Campo太阳雷达数据对太阳活动的周期性分析
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摘要
太阳雷达是利用雷达发射器主动向太阳发射特定波段的电磁波,并接收反射回波的雷达设备.通过研究回波的性质,了解太阳大气磁场结构、运动状况以及其他方面的重要信息.El Campo太阳雷达在长达8 yr的时间内对日冕进行了观测,跟踪了太阳活动的变化.运用Lomb–Scargle算法对其所获得的数据进行了周期性分析,发现其所测太阳的雷达散射截面数据的变化存在200 d和540 d的周期变化,然后对这两个周期进行了讨论,并选取了较大的散射截面(≥20σ⊙)与Dst指数进行了对比分析.最后对El Campo太阳雷达实验进行了总结,并展望了太阳雷达未来的发展.
Solar Radar can transmit radar waves to the Sun actively. By analyzing the echoes, we can obtain motions, magnetic field, and other information of solar atmosphere. The El Campo solar radar has done regular observations on solar corona for 8 years from 1961 to 1969, which tracked solar activities during a long time. We analyzed El Campo data with the Lomb–Scargle periodogram algorithm, and found that there are periods of 200 days and 540 days in the variations of the solar radar cross sections. Compared radar cross sections with the Dst indexes, we found that there was no significant relationship between them. Then, the proposal of solar radar in future was made.
Solar Radar can transmit radar waves to the Sun actively. By analyzing the echoes, we can obtain motions, magnetic field, and other information of solar atmosphere. The El Campo solar radar has done regular observations on solar corona for 8 years from 1961 to 1969, which tracked solar activities during a long time. We analyzed El Campo data with the Lomb–Scargle periodogram algorithm, and found that there are periods of 200 days and 540 days in the variations of the solar radar cross sections. Compared radar cross sections with the Dst indexes, we found that there was no significant relationship between them. Then, the proposal of solar radar in future was made.
引文
[1]Hundhausen A J.JGR,1993,98:13177
[2]林元章.太阳物理导论.北京:科学出版社,2000:539-554
[3]Gonzalez W D,Joselyn J A,Kamide Y,et al.JGR,1994,99:5771
[4]王开让,林隽,刘连光,等.天文学报,2012,53:1
[5]Wang K R,Lin J,Liu L G,et al.Ch A&A,2012,36:261
[6]王开让,刘连光,李燕.天文学报,2014,55:381
[7]Wang K R,Liu L G,Li Y.Ch A&A,2015,39:78
[8]Boteler D,Pirjola R,Nevanlinna H.Ad Sp R,1998,22:17
[9]徐文耀.地球电磁现象物理学.合肥:中国科学技术大学出版社,2009
[10]Tousey R.Space Research XIII,1993,2:713
[11]方成,丁明德,陈鹏飞.太阳活动区物理.南京:南京大学出版社,2008:283-284
[12]Coles A W.Solar and Space Weather Radiophysics,2004,314:335
[13]Kerr F J.Proc.IRE,1952,40:660
[14]Bass F G,Braude S Ya.Ukr.Jour.of Phys.,1957,2:149
[15]Eshleman V R,Barthle R C,Gallagher P B.Science,1960,131:329
[16]James J C.So Ph,1970,12:143
[17]Coles A W,Harmon J,Sulzer M,et al.A Proposal to Establish a Solar Radar at Arecibo-July 16,2001
[18]Tsurutani B T,Gonzalez W D,Lakhina G S,et al.JGR,2003,108:1268
[19]Chapman S,Bartels J.Geomagnetism.Oxford:Clarendon Press,1940:63-66
[20]Mayaud P N.Geophys.Monogr.Ser.,1980,22:115
[21]Zhang J,Richardson I G,Webb D F,et al.JGR,2007,112:A11102
[22]Zhang J,Richardson I G,Webb D F,et al.JGR,2007,112:A12103
[23]Evens J V,Hagfors T.Radar Astronomy.New York:Mc Graw-Hill,1968:323-384
[24]庄钊文,袁乃昌,莫锦军,等.军用目标雷达散射截面预估与测量.北京:科学出版社,2007:1-4
[25]Lomb N R.Ap SS,1976,39:447
[26]Scargle J D.Ap JS,1981,45:1
[27]徐斌,杨涛,谭保华,等.核电子学与探测技术,2001,31:702
[28]宋文彬,汪景琇.中国科学G辑,2006,2:213
[29]Qu Z N,Xie J L.Ap J,2013,762:23
[30]Chowdhury P,Choudhary D P,Gosain S.Ap J,2013,768:10
[31]Rodriguez P.American Geophysical Union,2000,199:155
[32]Lou Y Q,Wang Y M,Fan Z H,et al.MNRAS,2003,345:809
[33]Howe R,Christensen D J,Hill F,et al.Science,2000,287:2456
[34]Krivova N A,Solanki S K.A&A,2002,394:701
[35]Obridko V N,Shelting B D.Ad Sp R,2007,40:1006
[36]Richardson J D,Paularena K I,Belcher J W,et al.JGR Letters,1994,21:1559
[37]Hathaway D H.LRSP,2010,7:1
[38]Rodriguez P.P&SS,2004,52:1391
[39]李春来,欧阳自远,都亨.第四纪研究,2002,22:540
[40]Stansberry G,Matney M,Settecerri T,et al.Ac Aau,1997,41:53
[2]林元章.太阳物理导论.北京:科学出版社,2000:539-554
[3]Gonzalez W D,Joselyn J A,Kamide Y,et al.JGR,1994,99:5771
[4]王开让,林隽,刘连光,等.天文学报,2012,53:1
[5]Wang K R,Lin J,Liu L G,et al.Ch A&A,2012,36:261
[6]王开让,刘连光,李燕.天文学报,2014,55:381
[7]Wang K R,Liu L G,Li Y.Ch A&A,2015,39:78
[8]Boteler D,Pirjola R,Nevanlinna H.Ad Sp R,1998,22:17
[9]徐文耀.地球电磁现象物理学.合肥:中国科学技术大学出版社,2009
[10]Tousey R.Space Research XIII,1993,2:713
[11]方成,丁明德,陈鹏飞.太阳活动区物理.南京:南京大学出版社,2008:283-284
[12]Coles A W.Solar and Space Weather Radiophysics,2004,314:335
[13]Kerr F J.Proc.IRE,1952,40:660
[14]Bass F G,Braude S Ya.Ukr.Jour.of Phys.,1957,2:149
[15]Eshleman V R,Barthle R C,Gallagher P B.Science,1960,131:329
[16]James J C.So Ph,1970,12:143
[17]Coles A W,Harmon J,Sulzer M,et al.A Proposal to Establish a Solar Radar at Arecibo-July 16,2001
[18]Tsurutani B T,Gonzalez W D,Lakhina G S,et al.JGR,2003,108:1268
[19]Chapman S,Bartels J.Geomagnetism.Oxford:Clarendon Press,1940:63-66
[20]Mayaud P N.Geophys.Monogr.Ser.,1980,22:115
[21]Zhang J,Richardson I G,Webb D F,et al.JGR,2007,112:A11102
[22]Zhang J,Richardson I G,Webb D F,et al.JGR,2007,112:A12103
[23]Evens J V,Hagfors T.Radar Astronomy.New York:Mc Graw-Hill,1968:323-384
[24]庄钊文,袁乃昌,莫锦军,等.军用目标雷达散射截面预估与测量.北京:科学出版社,2007:1-4
[25]Lomb N R.Ap SS,1976,39:447
[26]Scargle J D.Ap JS,1981,45:1
[27]徐斌,杨涛,谭保华,等.核电子学与探测技术,2001,31:702
[28]宋文彬,汪景琇.中国科学G辑,2006,2:213
[29]Qu Z N,Xie J L.Ap J,2013,762:23
[30]Chowdhury P,Choudhary D P,Gosain S.Ap J,2013,768:10
[31]Rodriguez P.American Geophysical Union,2000,199:155
[32]Lou Y Q,Wang Y M,Fan Z H,et al.MNRAS,2003,345:809
[33]Howe R,Christensen D J,Hill F,et al.Science,2000,287:2456
[34]Krivova N A,Solanki S K.A&A,2002,394:701
[35]Obridko V N,Shelting B D.Ad Sp R,2007,40:1006
[36]Richardson J D,Paularena K I,Belcher J W,et al.JGR Letters,1994,21:1559
[37]Hathaway D H.LRSP,2010,7:1
[38]Rodriguez P.P&SS,2004,52:1391
[39]李春来,欧阳自远,都亨.第四纪研究,2002,22:540
[40]Stansberry G,Matney M,Settecerri T,et al.Ac Aau,1997,41:53