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There occur frequently the ionospheric scintillation events at low and middle latitudes, which seriously affect the radio transmission process of satellite link, resulting in the decline of satellite communication and navigation signal quality and even interrupt. During the gestation period before the ionospheric scintillation, the growth rate of plasma instability can be reduced and thus suppress the scintillation events by releasing the electron density-enhancing chemicals in the ionosphere plasma bubble, filling with plasma bubble, changing the plasma environmental characteristics, and regulating the ionospheric dynamics process. The theory and method of suppressing the ionospheric scintillation based on chemical release are tnvestigated. According to the change of the plasma environment caused by the chemical release, and the quantitatively calculating of the contribution of control factors to the growth rate of instability, an ionospheric scintillation suppression model is built, which is based on chemical release into ionosphere. The process of plasma bubble filling out is simulated and the results of the simulation show that the plasma cloud is completely filled with plasma bubbles after 1200 seconds, which reduces the plasma density gradient and suppresses the growth of plasma instability. The growth of plasma instability decreases from 0.2 before releasing to about 0.0004 after releasing, and no new instability is excited within 20 minutes after the plasma bubble has been filled up. Guangdong, South China Sea and other regions in China are at the peak of equatorial anomalies, and the occurrence rate and severity of scintillation are more significant than those in the equatorial and Polar Regions, thus these regions become the regions where there occur most frequently the scintillation and the most serious influence globally. The research work of this paper will lay a solid theoretical foundation for the technology of suppressing the satellite signal ionospheric scintillation in middle and low latitude area of China.
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图 1 电离层闪烁对卫星导航和通信的影响示意图
Figure 1. The schematic diagram of the influence of ionospheric scintillation on satellite navigation and communication
图 2 (a) MOSC-2试验期间夜晚电离层电子密度分布图; (b) 试验后第二天夜晚电子密度分布图
Figure 2. (a) Electron density distribution at night during the experiment; (b) electron density distribution at next night of the experiment
图 3 电离层闪烁抑制仿真模型设计流程图
Figure 3. The design flow chart of ionospheric scintillation suppression simulation model.
图 4 在250 km高度释放5.6 kg Sm蒸气, 电子密度随时间的演化
Figure 4. Electron density evolution after releasing 5.6 kg Sm at 250 km altitude.
图 5 在250 km高度释放5.6 kg Sm蒸气的电离层闪烁抑制效果
Figure 5. The scintillation suppression effect of releasing 5.6 kg Sm at 250 km altitude
图 6 在250 km高度释放5.6 kg Sm蒸气, 不稳定性增长率随时间的变化
Figure 6. The evolution of instability growth rate after releasing 5.6 kg Sm at 250 km altitude.
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[1] Kelley M C 2009 The Earth’s Ionosphere: Plasma Physics & Electrodynamics 2nd Ed (Burlington: Academic Press) pp96–112
[2] Kuo S P, Cheo B R, Lee M C 1983 J. Geophys. Res. 88 417
Google Scholar
[3] Baker D N 2000 IEEE Trans. Plasma Sci. 28 2007
Google Scholar
[4] Frederickson A R, Dennison J R 2003 IEEE Trans. Nucl. Sci. 50 2284
Google Scholar
[5] Gubby R, Evans J 2002 Atmos. Terr. Phys. 64 1723
Google Scholar
[6] Yokoyama T, Shinagawa H, Jin H 2014 J. Geophys. Res.: Space Phys. 119 474
[7] Yokoyama T, Jin H, Shinagawa H 2015 J. Geophys. Res. Space Phys. 120
Google Scholar
[8] Klobuchar J A, Abdu M A 1989 J. Geophys. Res.: Space Phys. 94 2721
Google Scholar
[9] Dwight P S, Manfred A B, Hake R D 1981 Planet. Space Sci. 29 1267
[10] Sharpee B D, Slanger T G 2006 J. Phys. Chem. 110 6707
Google Scholar
[11] Reasoner D L 1992 J. Spacecraft Rockets 29 580
Google Scholar
[12] Caton R G, Pedersen T R, Groves K M, et al. 2017 Radio Sci. 52 539
Google Scholar
[13] Rettere J, Groves K M, Pedersen T R, Caton R G 2017 Radio Sci. 52 604
Google Scholar
[14] Bernhardt P A, Siefring C L, Briczinski S J, Viggiano A, Caton R G, Pedersen T R, Holmes J M, Ard S, Shuman N, Groves K M 2017 Radio Sci. 52 559
Google Scholar
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Google Scholar
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Google Scholar
[17] Joshi D, Groves K M, McNeil W, et al. 2017 Radio Sci. 52 710
Google Scholar
[18] 黄文耿, 古士芬 2005 空间科学学报 25 254
Google Scholar
Huang W G, Gu S F 2005 J. Space Sci. 25 254
Google Scholar
[19] 黄文耿, 古士芬 2005 空间科学学报 28 81
Google Scholar
Huang W G, Gu S F 2005 J. Space Sci. 28 81
Google Scholar
[20] 胡耀垓, 张援农, 赵正予 2010 物理学报 59 8293
Google Scholar
Hu Y G, Zhang Y N, Zhao Z Y 2010 Acta Phys. Sin. 59 8293
Google Scholar
[21] Hu Y G, Zhao Z Y, Zhang Y N 2011 J. Geophys. Res. 116 A07307
[22] 胡耀垓, 赵正予, 项薇 2010 物理学报 60 099402
Hu Y G, Zhao Z Y, Xiang W 2010 Acta Phys. Sin. 60 099402
[23] 胡耀垓, 张援农, 赵正予 2012 物理学报 61 089401
Google Scholar
Hu Y G, Zhang Y N, Zhao Z Y 2012 Acta Phys. Sin. 61 089401
Google Scholar
[24] 汪四成, 方涵先, 杨升高, 等 2012 地球物理学进展 27 2464
Google Scholar
Wang S C, Fang H X, Yang S G, et al. 2012 Prog. Geophys. 27 2464
Google Scholar
[25] 汪四成, 方涵先 2013 地球物理学报 56 2906
Google Scholar
Wang S C, Fang H X 2013 J. Geophy. 56 2906
Google Scholar
[26] 汪四成, 方涵先, 杨升高, 等 2012 大气科学学报 36 499
Wang S C, Fang H X, Yang S G, et al. 2012 J. Atmos. Sci. 36 499
[27] Zhao H S, Feng J, Xu Z W, Wu J, Wu Z S, Xu B, Xue K, Hu Y L 2016 J. Geophys. Res.: Space Phys. 121
Google Scholar
[28] Xu Z W, Zhao H S, Wu J, Feng J, Xu B, Zhang Y B, Xue K, Ma Z Z 2017 Adv. Space Res. 59 1810
Google Scholar
[29] 赵海生, 许正文, 吴振森, 等 2016 物理学报 65 209401
Google Scholar
Zhao H S, Xu Z W, Wu Z S, et al. 2016 Acta Phys. Sin. 65 209401
Google Scholar
[30] 赵海生, 许正文, 吴振森, 等 2018 物理学报 67 019401
Google Scholar
Zhao H S, Xu Z H, Xu Z W, Wu Z S, et al. 2018 Acta Phys. Sin. 67 019401
Google Scholar
[31] Liu Y, Cao J, Xu L, et al. 2014 Geophys. Res. Lett. 45 1413
[32] Liu Y, Cao J, Xu L, et al. 2014 J. Geophys. Res.: Space Phys. 119 4134
Google Scholar
[33] 罗伟华, 徐继生, 徐良 2009 地球物理学报 52 849
Google Scholar
Luo W H, Xu J S, Xu L 2009 J. Geophy. Res. 52 849
Google Scholar
[34] Gao J, Guo L, Xu Z, et al. 2018 Adv. Space Res. 61 2234
Google Scholar
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