论文部分内容阅读
掩星观测能够提供地面到低轨卫星轨道高度处的整个电离层电子密度剖面,对于顶部电离层的研究有重要的作用。本文利用COSMIC(constellation observing system for meteorology ionosphere and climate)掩星数据反演了电子密度剖面,提取了F2层峰值高度(hmF2)、F2层峰值密度(NmF2)、垂直标尺高(vertical scale height,VSH)等电离层参数,研究了南极地区的F2层在太阳活动周期内的变化、年际变化、周日变化等,并且重点分析了南极地区的顶部电离层的垂直结构特征,尤其是威德尔海异常在垂直方向上的变化。结果表明,整个南极的hmF2每日均值在250~300km左右,NmF2每日均值在1~8×1011 el/m3之间,VSH每日均值在100~250km,威德尔海异常主要表现在顶部电子密度的增强和底部电子密度的减少。
Occultation observations can provide the entire ionospheric electron density profile from the ground to LEO satellite orbit height, which plays an important role in the study of the top ionosphere. In this paper, the electron density profiles were retrieved using the occultation data of COSMIC (constellation observing system for meteorology ionosphere and climate). The peak height (hmF2), peak density of F2 (NmF2), vertical scale height (VSH) ) And other ionospheric parameters, we studied the variations, annual variations, and diurnal variations of the F2 layer in the Antarctic during the solar activity cycle, and analyzed the vertical structural features of the top ionosphere in the Antarctic region, especially the Weddell Sea Abnormal changes in the vertical direction. The results showed that the daily average of hmF2 in the whole Antarctic was about 250 ~ 300km, the daily average of NmF2 was in the range of 1 ~ 8 × 1011 el / m3, and the average daily average of VSH was in the range of 100 ~ 250km. The Waddell Sea anomaly mainly manifested in the top electron Increased density and reduced electron density at the bottom.