Study of Sporadic E Layers Based on Occultation Data Observed by FY-3C Satellite
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摘要: 利用FY-3C极轨卫星提供的2014年6月至2015年5月的GPS无线电掩星数据,统计分析了全球范围内抽样频率为50 Hz的C/A码SNR扰动情况,进而对偶发E层进行了研究.结果表明:偶发E层在夏季半球中纬地区的扰动强度远远大于冬季半球同一纬度地区的扰动强度,偶发E层在纬度40°附近扰动明显增强;在E层100 km高度附近,Es层在10:00 LT和22:00 LT达到峰值;Es层在夏季半球的出现率明显高于冬季半球;FY-3C卫星的掩星观测结果与COSMIC系统的观测结果较一致,可以利用FY-3C卫星的掩星数据研究电离层偶发E层等的变化.Abstract: Using the GPS radio occultation data from June 2014 to May 2015 provided by FY-3C polar-orbiting satellites,the SNR disturbances of C/A code with sampling frequency of 50 Hz on a global scale are statistically analyzed,and the disturbance strength of sporadic E layers is also studied.Results show that the disturbance strength of sporadic E layer at mid-latitudes in the summer hemisphere area is far greater than that at the same latitudes in the winter hemisphere,and the disturbances of the sporadic E layers (Es) near the latitude of 40° are significantly enhanced.In addition,at 100 km height,the disturbances of Es layers reach the peaks at 10:00 LT and 22:00 LT. The occurrence rates of sporadic E in summer hemisphere are significantly higher than that in the winter hemisphere.The results observed by FY-3C satellite are consistent with those observed by the COSMIC system.Therefore,the occultation data of FY-3C satellite could be used to study ionospheric sporadic E layers.
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Key words:
- FY-3C /
- COSMIC /
- Radio occultation /
- Sporadic E layers
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[1] SMITH E K. Worldwide Occurrence of Sporadic E[R]. Washington D C:National Bureau of Standards, Boulder, Colo, USA, 1957 [2] WHITEHEAD J D. The formation of the sporadic-E layer in the temperate zones[J]. J. Atmos. Terr. Phys., 1961, 20:49-58 [3] AXFORD W I. Note on mechanism for the vertical transport of ionization in the ionosphere due to neutral wind shears[J]. J. Geophys. Res., 1963, 68(3):769-779 [4] KATO S, ASO T, HORIUCHI T. Sporadic-E formation by wind shear comparison between observation and theory[J]. Radio Sci., 1972, 7:359-362 [5] HALDOUPIS C, PANCHEVA D, SINGER W, et al. An explanation for the seasonal dependence of mid-latitude sporadic E layers[J]. J. Geophys. Res., 2007, 112, A06315 [6] ZUO Xiaomin, WAN Weixing. The simulation analysis of mid-latitude sporadic E-layers[J]. Chin. J. Space Sci., 2003, 23(5):371-378(左小敏, 万卫星. 中纬突发E层特性的模拟分析[J]. 空间科学学报, 2003, 23(5):371-378) [7] HAN Yanming, HU Jin, KONG Qingyan, et al. Statistics on occurrence regularity of Es in south of China[J]. Chin. J. Radio Sci., 2009, 24(5):929-933(韩彦明, 胡进, 孔庆颜, 等.中国南部地区Es层出现规律统计及分析[J]. 电波科学学报, 2009, (5):929-933) [8] KONG Qingyan, CHEN Yue, LIU Wen, et al. Investigation on Es properties in representative region of China[J]. Chin. J. Space Sci., 2012, 32(4):506-512(孔庆颜, 陈跃, 柳文, 等.中国典型区域Es特性研究[J].空间科学学报,, 32(4):506-512) [9] HAJJ G~A, AO C~O, ⅡJIMA B~A, et al.~CHAMP~and SAC-C atmospheric occultation results and inter-com-pa-ri-sons[J]. J. Geophys. Res., 2003, 109(D6):528-538 [10] HOCKE K, IGARASHI K, NAKAMURA M, et al. Global sounding of sporadic E layers by the GPS/MET radio occultation experiment[J]. J. Atmos. Sol.-Terr. Phy., 2001, 63(18):1973-1980 [11] ARRAS C, WICKERT J, BEYERLE G, et al. A~hboxglobal climatology of ionospheric irregularities derived from hboxGPS radio occultation[J]. Geophys. Res. Lett., 2008, 35:L14809 [12] SCHREINER W S, SOKOLOVSKIY S V, ROCKENC, et al. Analysis and validation of GPS/MET radio occultation data in the ionosphere[J]. Radio Sci., 1999, 34:949-966 [13] WU D L, AO C O, HAJJ G A, et al. Sporadic-E Morphology from GPS-CHAMP radio occultation[J]. J. Geophys. Rev. Space, 2005, 110:1-18 [14] WANG Zihui, ZOU Yuhua, WU Zihao. Analyzing sporadic E phenomena from CHAMP satellite occultation data[J]. J. Guilin Univ. Electr. Tech., 2011, 31(1):17-20(王自辉,邹玉华, 巫子好. 利用CHAMP卫星掩星数据分析偶发E层现象[J]. 桂林电子科技大学学报, 2011, 31(1):17-20) [15] WHITEHEAD J D. Recent work on mid-latitude and equa-torial sporadic E[J]. J. Atmos. Terr. Phys., 1989, 51:20-49 [16] GONG Yu, SHI Jiankui, WANG Guojun. Investigation on properties of ionospheric Es layer in Hainan region[J]. J. Space Sci., 2007, 27(3):198-203(龚宇, 史建魁, 王国军. 海南地区电离层Es特性研究[J]. 空间科学学报, 2007, 27(3):198-203) [17] PIETRELLA M, PEZZOPANE M, BIANCHI C. Occurrence of sporadic-E layer over the ionospheric station of Rome:Analysis of data for thirty-two years[J]. Adv.linebreak Space Res., 2009, 44:72-81 [18] HALDOUPIS C. A Tutorial review on sporadic E lay-ers[J]. Aeron. Earth Atmos. Ionos., 2011, 2:381-394 -
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