三亚和桂林L波段电离层闪烁特征的比较
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摘要
为了研究中国低纬地区L波段电离层闪烁特征,利用2012年三亚(地磁纬度8.33°N)、桂林(地磁纬度15.29°N)的GPS电离层闪烁监测数据和三亚电离层垂测仪数据,比较了三亚和桂林的幅度闪烁特征。结果表明:三亚和桂林的闪烁均主要出现在春秋季,主要发生在UT12-UT18;三亚闪烁活动比桂林频繁且持续时间更长,但三亚闪烁的强度比桂林的低。分析三亚电离层垂测仪数据后发现:在UT11-UT12(即LT18.3-LT19.3)期间,三亚和桂林都观测到闪烁活动情况下的hmF2(F2层峰高)和h′F(F层虚高)的抬升速度最大、抬升高度最高,仅三亚观测到闪烁活动情况下的hmF2和h′F的抬升速度次之、抬升高度次之,两地都未观测到闪烁活动情况下的hmF2和h′F的抬升现象不明显。
In order to investigate the characteristics of L-band ionospheric scintillations in Chinese low latitude region,the features of amplitude scintillations observed at Sanya(geomagnetic latitude:8.33°N)and Guilin(geomagnetic latitude:15.29°N)in 2012 have been compared by using GPS ionospheric scintillations data recorded at Sanya and Guilin and ionosonde data recorded at Sanya.The results show that scintillations at Sanya and Guilin occur mostly at spring and autumn,mainly during the period of UT12-UT18.Scintillation activities at Sanya occur more frequently and last longer,but the intensity of scintillations at Sanya is lower than at Guilin.After analyzing the ionosonde data recorded at Sanya,it has been found that during the period of UT11-UT12(LT18.3-LT19.3),lifting speed is the largest and lifting height is the highest for hmF2(peak height of F2 layer)and h′F(virtual height of F layer)when scintillations at Sanya and Guilin were observed.The lifting speed and lifting height for hmF2 and h′F are less under the condition of observing scintillations only at Sanya.Moreover,the lifting movements of hmF2 and h′F are not obvious under the situation that no scintillations are observed at the two places.
In order to investigate the characteristics of L-band ionospheric scintillations in Chinese low latitude region,the features of amplitude scintillations observed at Sanya(geomagnetic latitude:8.33°N)and Guilin(geomagnetic latitude:15.29°N)in 2012 have been compared by using GPS ionospheric scintillations data recorded at Sanya and Guilin and ionosonde data recorded at Sanya.The results show that scintillations at Sanya and Guilin occur mostly at spring and autumn,mainly during the period of UT12-UT18.Scintillation activities at Sanya occur more frequently and last longer,but the intensity of scintillations at Sanya is lower than at Guilin.After analyzing the ionosonde data recorded at Sanya,it has been found that during the period of UT11-UT12(LT18.3-LT19.3),lifting speed is the largest and lifting height is the highest for hmF2(peak height of F2 layer)and h′F(virtual height of F layer)when scintillations at Sanya and Guilin were observed.The lifting speed and lifting height for hmF2 and h′F are less under the condition of observing scintillations only at Sanya.Moreover,the lifting movements of hmF2 and h′F are not obvious under the situation that no scintillations are observed at the two places.
引文
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[7]王冬丽,邹玉华,沈秋生.桂林地区L-波段电离层闪烁初步统计分析[J].桂林电子科技大学学报,2009,29(1):73-76.
[8]RAY S,DASGUPTA A.Geostationary L-band signal scintillation observations near the crest of equatorial anomaly in the Indian zone[J].Journal of Atmospheric and Solar-Terrestrial Physics,2007,69(4):500-514.
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[2]LIU K,LI G,NING B,et al.Statistical characteristics of low-latitude ionospheric scintillation over China[J].Advances in Space Research,2015,55(5):1356-1365.
[3]BASU S,GROVES K M,QUINN J M,et al.A comparison of TEC fluctuations and scintillations at Ascension Island[J].Journal of Atmospheric and Solar-Terrestrial Physics,1999,61(16):1219-1226.
[4]DAS A,GUPTA A D,RAY S.Characteristics of L-band(1.5 GHz)and VHF(244 MHz)amplitude scintillations recorded at Kolkata during 1996-2006and development of models for the occurrence probability of scintillations using neural network[J].Journal of Atmospheric and Solar-Terrestrial Physics,2010,72(9/10):685-704.
[5]ZOU Y.Ionospheric scintillations at Guilin detected by GPS ground-based and radio occultation observations[J].Advances in Space Research,2011,47(6):945-965.
[6]周彩霞.中低纬电离层不规则体及闪烁特性研究[D].西安:西安电子科技大学,2014:44.
[7]王冬丽,邹玉华,沈秋生.桂林地区L-波段电离层闪烁初步统计分析[J].桂林电子科技大学学报,2009,29(1):73-76.
[8]RAY S,DASGUPTA A.Geostationary L-band signal scintillation observations near the crest of equatorial anomaly in the Indian zone[J].Journal of Atmospheric and Solar-Terrestrial Physics,2007,69(4):500-514.
[9]CHATTERJEE S,CHAKRABORTY S K.Variability of ionospheric scintillation near the equatorial anomaly crest of the Indian zone[J].Annales Geophysicae,2013,31(4):697-711.
[10]XU J S,ZHU J,LI L.Effects of a major storm on GPS amplitude scintillations and phase fluctuation at Wuhan in China[J].Advances in Space Research,2007,39(8):1318-1324.