海口站电离层闪烁强度功率谱分析与建模应用
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摘要
基于中国海口站(20.00°N,110.33°E)获取的2013全年UHF频段电离层闪烁信号强度数据,利用Welch算法,分析给出了四类典型电离层闪烁强度功率谱.利用功率谱时序图分析方法,发现电离层不均匀体存在东西向水平周期性变化结构.提取全年功率谱指数p,通过统计分析发现谱指数p存在规律变化,据此建立一个谱指数经验模型,该谱指数模型已用于中国低纬区域电离层闪烁发生预报概率模型(CMSOP),进而对海口站UHF频段电离层闪烁发生概率观测数据和预报结果进行了对比分析.
The amplitude data of UHF-band ionospheric scintillations were recorded at a lowlatitude station of China,Haikou station(geographic:20.00°N,110.33°E),during the high sunspot activity year of 2013.Based on these data,the Welch algorithm of the Fast Fourier Transform methods was used to analyze the scintillation intensity power spectra,and four types of typical intensity power spectra were found and presented.A nearly sinusoidal fluctuation in the east-west horizontal direction was found in the irregularity structure by analyzing the contour map of spectral density as a function of local time and spatial scale.The spectral index p of the ionospheric amplitude scintillations was extracted for the year of 2013,and the variation of the spectral index p was analyzed by statistical method and an empirical model of the spectral index p over Haikou station was put forward,which was applied in the empirical Climatological Model of Scintillation Occurrence Probability(CMSOP) over the low-latitude of China.Finally the prediction of ionospheric scintillation occurrence over Haikou station from CMSOP is compared with the observations.
The amplitude data of UHF-band ionospheric scintillations were recorded at a lowlatitude station of China,Haikou station(geographic:20.00°N,110.33°E),during the high sunspot activity year of 2013.Based on these data,the Welch algorithm of the Fast Fourier Transform methods was used to analyze the scintillation intensity power spectra,and four types of typical intensity power spectra were found and presented.A nearly sinusoidal fluctuation in the east-west horizontal direction was found in the irregularity structure by analyzing the contour map of spectral density as a function of local time and spatial scale.The spectral index p of the ionospheric amplitude scintillations was extracted for the year of 2013,and the variation of the spectral index p was analyzed by statistical method and an empirical model of the spectral index p over Haikou station was put forward,which was applied in the empirical Climatological Model of Scintillation Occurrence Probability(CMSOP) over the low-latitude of China.Finally the prediction of ionospheric scintillation occurrence over Haikou station from CMSOP is compared with the observations.
引文
[1]BANERJEE P K.DABAS R S,REDDY B M C.C and L band transionospheric scintillation experiment:some results for applications to satellite radio systems[J].Radio Sci.,1992,27(6):955-969
[2]BENIGUEL Y.Global Ionospheric Propagation Model(GIM):A propagation model for scintillations of transmitted signals[J].Radio Sci.,2002,37(3):10-32
[3]XU Zhengwen,WU Jian,WU Zhensun.A survey of ionospheric effects on space-based radar[J].Waves Random Media,2001,14(2):S189-S273
[4]CANNON P S.Mitigation and exploitation of the ionosphere:A military perspective[J].Radio Sci.,2009,44,S0A20,DOl:10.1029/2000RS002393
[5]BISHOP G.BULLETT T W,GROVES K,et al.Operational Space Environment Network Display(OpSEND)[J].Radio Sci.,2004,39,RS1S26,DOI.10.1029/2002RS002836
[6]SECAN J A,BUSSEY R M,FREMOUW E J.An improved model of equatorial scintillation[J].Radio Sci.,1995,30(3):607-617
[7]BENIGUEL Y,HAMEL P.A global ionosphere scintillation propagation model for equatorial regions[J].Space Weather Space aim.,2011,1(1):1-8
[8]SHENG Dongsheng,ZHAO Zhenwei,SUN Shuji,WANG Feifei.Study on the adaptability of global ionospheric scintillation model at low-latitude in China[J].Chin.J.Space Sci.,2014,34(2):154-159(盛冬生,赵振维,孙树计,王飞飞.GISM模型在中国低纬地区的适用性分析[J].空间科学学报,2014,34(2):154-159)
[9]SPATZ D E,FRANKE S J,YEH K C.Analysis and interpretation of spaced receiver scintillation data recorded at an equatorial station[J].Radio Sci.,1988,23(3):347-361
[10]BHATTACHARYYA A,RASTOGI R G.Amplitude scintillations during the early and late phases of evolution of irregularities in the nighttime equatorial ionosphere[J].Radio Sci.,1985,20(4):935-946
[11]KIL H,HEELIS R A.Equatorial density irregularity structures at intermediate scales and their temporal evolution[J].J.Geophys.Res.,1998,103(A3):3969-3981
[12]VIJAYAKUMAR P N,PASRICHA P K.Parametrization of spectra of plasma bubble induced VHF satellite scintillations and its geophysical significance[J].Ann.Geophys.,1997,15:345-354
[13]FORTE B.Refractive scattering evidence from multifrequency scintillation spectra observed at auroral latitudes[J].Radio Sci.,2008,43,RS2012.DOI:10.1029/2007RS003715
[14]LEI Yuanhan,ZHANG Ling,MA Shuying et al.Spectra of VHF amplitude scintillation at Wuchang[J].Chin.J.Geophys.,1988,31(6):630-636(雷源汉,张凌,马淑英,等.武昌同步卫星信号幅度闪烁功率谱[J].地球物理学报,1988,31(6):630-636)
[15]LI G,NING B,YUAN H.Analysis of ionospheric scintillation spectra and TEC in the Chinese low latitude region[J].Earth Planets Space,2007,59:279-285
[16]LI Jinghua.Ionospheric Scintillation and Research on the Inversion Method of Irregularity Parameters[D].Xi'an:Xidian University,2006(李靖华.电离层闪烁及不规则体参数反演方法的研究[D].西安:西安电子科技大学,2006)
[17]RAMA RAO P V S,TULASI RAM S,NIRANJAN K,et al.VHF and L-band scintillation characteristics over an Indian low latitude station,Waltair(17.7°N,83.3°E)[J].Ann.Geophy.,2005,23:2457-2464
[18]HYSELL D L,KELLEY M C,SWARTZ W E,PFAFF R F,SWENSON C M.Steepened structures in equatorial spread F 2.Theory[J].J.Geophys.Res.,1994,99:8841-8850
[19]HAERENDAL G.Max Planck Institute fur Physik und Astrophysik[R].Garching,West Germany,1973
[20]LABELLE J,KELLEY M C.The generation of kilometer scale irregularities in equatorial spread-F[J].J.Geophys.Res.,1986,91:5504-5512
[21]VALLADARES C E,HANSON W B,MCCLURE J P,CRAGIN B L.Bottomside sinusoidal irregularities in the equatorial F region[J].J.Geophys.Res.,1983,88:8025-8042
[22]KELLEY M C,SEYLER C E,ZARGHAM S.Collisional interchange instability 2.A comparison of the numerical simulations with the in situ experimental data[J].J.Geophys.Res.,1987,92:10 089-10094
[23]HUANG C S,BEAUJARDIERE De La O,RODDY P A,et al.Large-scale quasiperiodic plasma bubbles:C/NOFS observations and casual mechanism[J].J.Geophys.Res.,2012,118:3602-3612
[24]ZHANG Hongbo,LIU Yumei,WU Jian,et al.Observations and modeling of UHF-band scintillation occurrence probability over the low-latitude region of China during the maximum activity of solar cycle 24[J].Ann.Geophys.,2015,33:93-100
[2]BENIGUEL Y.Global Ionospheric Propagation Model(GIM):A propagation model for scintillations of transmitted signals[J].Radio Sci.,2002,37(3):10-32
[3]XU Zhengwen,WU Jian,WU Zhensun.A survey of ionospheric effects on space-based radar[J].Waves Random Media,2001,14(2):S189-S273
[4]CANNON P S.Mitigation and exploitation of the ionosphere:A military perspective[J].Radio Sci.,2009,44,S0A20,DOl:10.1029/2000RS002393
[5]BISHOP G.BULLETT T W,GROVES K,et al.Operational Space Environment Network Display(OpSEND)[J].Radio Sci.,2004,39,RS1S26,DOI.10.1029/2002RS002836
[6]SECAN J A,BUSSEY R M,FREMOUW E J.An improved model of equatorial scintillation[J].Radio Sci.,1995,30(3):607-617
[7]BENIGUEL Y,HAMEL P.A global ionosphere scintillation propagation model for equatorial regions[J].Space Weather Space aim.,2011,1(1):1-8
[8]SHENG Dongsheng,ZHAO Zhenwei,SUN Shuji,WANG Feifei.Study on the adaptability of global ionospheric scintillation model at low-latitude in China[J].Chin.J.Space Sci.,2014,34(2):154-159(盛冬生,赵振维,孙树计,王飞飞.GISM模型在中国低纬地区的适用性分析[J].空间科学学报,2014,34(2):154-159)
[9]SPATZ D E,FRANKE S J,YEH K C.Analysis and interpretation of spaced receiver scintillation data recorded at an equatorial station[J].Radio Sci.,1988,23(3):347-361
[10]BHATTACHARYYA A,RASTOGI R G.Amplitude scintillations during the early and late phases of evolution of irregularities in the nighttime equatorial ionosphere[J].Radio Sci.,1985,20(4):935-946
[11]KIL H,HEELIS R A.Equatorial density irregularity structures at intermediate scales and their temporal evolution[J].J.Geophys.Res.,1998,103(A3):3969-3981
[12]VIJAYAKUMAR P N,PASRICHA P K.Parametrization of spectra of plasma bubble induced VHF satellite scintillations and its geophysical significance[J].Ann.Geophys.,1997,15:345-354
[13]FORTE B.Refractive scattering evidence from multifrequency scintillation spectra observed at auroral latitudes[J].Radio Sci.,2008,43,RS2012.DOI:10.1029/2007RS003715
[14]LEI Yuanhan,ZHANG Ling,MA Shuying et al.Spectra of VHF amplitude scintillation at Wuchang[J].Chin.J.Geophys.,1988,31(6):630-636(雷源汉,张凌,马淑英,等.武昌同步卫星信号幅度闪烁功率谱[J].地球物理学报,1988,31(6):630-636)
[15]LI G,NING B,YUAN H.Analysis of ionospheric scintillation spectra and TEC in the Chinese low latitude region[J].Earth Planets Space,2007,59:279-285
[16]LI Jinghua.Ionospheric Scintillation and Research on the Inversion Method of Irregularity Parameters[D].Xi'an:Xidian University,2006(李靖华.电离层闪烁及不规则体参数反演方法的研究[D].西安:西安电子科技大学,2006)
[17]RAMA RAO P V S,TULASI RAM S,NIRANJAN K,et al.VHF and L-band scintillation characteristics over an Indian low latitude station,Waltair(17.7°N,83.3°E)[J].Ann.Geophy.,2005,23:2457-2464
[18]HYSELL D L,KELLEY M C,SWARTZ W E,PFAFF R F,SWENSON C M.Steepened structures in equatorial spread F 2.Theory[J].J.Geophys.Res.,1994,99:8841-8850
[19]HAERENDAL G.Max Planck Institute fur Physik und Astrophysik[R].Garching,West Germany,1973
[20]LABELLE J,KELLEY M C.The generation of kilometer scale irregularities in equatorial spread-F[J].J.Geophys.Res.,1986,91:5504-5512
[21]VALLADARES C E,HANSON W B,MCCLURE J P,CRAGIN B L.Bottomside sinusoidal irregularities in the equatorial F region[J].J.Geophys.Res.,1983,88:8025-8042
[22]KELLEY M C,SEYLER C E,ZARGHAM S.Collisional interchange instability 2.A comparison of the numerical simulations with the in situ experimental data[J].J.Geophys.Res.,1987,92:10 089-10094
[23]HUANG C S,BEAUJARDIERE De La O,RODDY P A,et al.Large-scale quasiperiodic plasma bubbles:C/NOFS observations and casual mechanism[J].J.Geophys.Res.,2012,118:3602-3612
[24]ZHANG Hongbo,LIU Yumei,WU Jian,et al.Observations and modeling of UHF-band scintillation occurrence probability over the low-latitude region of China during the maximum activity of solar cycle 24[J].Ann.Geophys.,2015,33:93-100