电离层行波扰动(TIDs,Traveling Ionospheric Disturbances)是电离层一种周期性的电子浓度波动结构,它与上层大气内的声重力波运动有关.在前人的工作基础上,提出了利用高频返回散射技术判别TIDs的方法,建立了TIDs特征参数的理论研究方法.并通过分析多方位返回散射试验数据,研究定频返回散射回波信号群距离和跳距随时间、方位角的变化特征,提取了TIDs的运动周期、运动方向、波长等特征参数信息,从而实现对宽空间、大区域电离层波动特性的研究.
Abstract
Traveling ionospheric disturbances (TIDs) are periodic electron density fluctuating structures.It is associated with the movement of gravity waves in the upper atmosphere.On the basis of the previous research of the pundit,the method used to identify the TIDs by the high frequency backscatter sounding data is presented,and the technique to obtain the TIDs character parameters is established.Via analyzing the mutibeam-direction backscatter data,the variation character of group path and skip distance with the time and azimuth is researched.And the TIDs parameters including movement period,direction,wavelength,et cetera are obtained.Finally,the research of ionospheric fluctuating characteristic in large areas is achieved.
关键词
行波扰动 /
返回散射探测 /
电离层
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Key words
traveling ionospheric disturbances /
backscatter sounding /
ionosphere
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中图分类号:
TN011
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参考文献
[1] Martyn D F.Large-scale movements of ionization in the ionosphere[J].J Geo Research,1959,64(2):2178-2179.
[2] Chan K L,Villard O G,et al.Observation of Correlated Frequency Fluctuations of WWV-20 and PR-17 as Received at Stanford University,Palo Alto,California,and University of Washington,Seattle,Washington. USA:Stanford University,Stanfard Electronics Laboratories,1961.
[3] 焦培南.1987年9月23日日食的电离层波动现象[J].地球物理学报,1990,33(4):391-398.
[4] Ahmadov R R,Kunitsyn V E.Simulation of generation and propagation of acoustic gravity waves in the atmosphere during a rocket flight[J].Int J Geomag Aeronomy,2004,5:1-12.
[5] Ratovsky K G,Medvedev A V,et al.Case studies of height structure of TID propagation characteristics using cross correlation analysis of incoherent scatter radar and DPS-4 ionosonde data[J].Adv Space Res,2008,41(9):1454-1458.
[6] 孙广俊,齐东玉,李铁成.利用返回散射系统监测海洋回波[J].电子学报,2005,33(7):1334-1337. SUN Guang jun,QI Dong yu,LI Tie cheng.Sea echo detection with the system of ionospheric backscatter so unding[J].Acta Electronica Sinica,2005,33(7):1334-1337.(in Chinese).
[7] 蔚娜,李铁成,柳文,凡俊梅.高频返回散射系统中一种非长干扰的抑制方法[J].电子学报,2010,38(3):620-625. WEI Na,LI Tie cheng,LIU Wen,FAN Jun mei.An approach of suppressing non-long interference in HF backscatter system[J].Acta Electronica Sinica,2010,38(3):620-625.(in Chinese).
[8] Chan K L,Villard O G.Observation of large-scale traveling ionospheric disturbance by spaced-path high frequency instantaneous-frequency measurements[J].J Geo Research,1962,67(3):973-988.
[9] Georges T M,Judith J S.HF radar signatures of traveling ionospheric irregularities,3D ray-tracing simulation[J].Radio Sci,1969,4(8):679-696.
[10] Fritts D C,Vadas S L,et al.Gravity wave and tidal influences on equatorial spread F based on observations during the Spread F Experiment (SpreadFEx)[J].Ann Geophys,2008,26(4):3235-3252.
[11] Stocker A J,Arnold N F,Jones T B.The synthesis of travelling ionospheric disturbance (TID) signatures in HF radar observations using ray tracing[J].Ann Geophysicae,2000,18(1):56-64.
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脚注
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基金
国家自然科学基金重点项目 (No.61032011)
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