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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Ionospheric foF2 variability over the Southeast Asian sector
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Ionospheric foF2 variability over the Southeast Asian sector

机译：电离层foF2东南可变性亚洲部门

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摘要

This paper presents the diurnal, seasonal, and solar activity impacts on the variability of ionospheric foF2 over the Southeast Asian sector. Data from three ionosonde stations, namely, Manila (14.7°N, 121.1°F, dip 14.7°N), Okinawa (26.3°N, 127.8°F, dip 36.8°N), and Vanimo (2.7°S, 141.3°F, dip 22.5°S), were used for the investigation via the standard deviation approach. The diurnal analysis revealed that foF2 is more susceptible to variability during the nighttime than the daytime. The observed variability is characterized by two peaks: a postsunset peak (15%-50%, corresponding to 3-14 MHz for the mean foF2 values) and a postmidnight peak (18%-68%; corresponding to 2-9 MHz for the mean foF2 values). Seasonally, the trend of the foF2 variability maximum does not follow any typical pattern (no particular season has a leading edge over others) for all levels of solar activity. On average the foF2 variability maximum was observed at the Vanimo station during low- and high-solar-activity years (1986 and 1989, respectively). During the moderate-solar-activity year (1983), the foF2 variability maximum was observed at the Manila station. With the exception of the Okinawa data, where little or no difference in the foF2 variability peaks during the low- and moderate-solar-activity years was noticed, foF2 variability increases with decreasing solar activity at all stations.
机译：摘要介绍了昼夜、季节和太阳活动变化的影响电离层foF2在东南亚市场。数据从三个ionosonde站,即141.3°F,下降22.5°,用于通过标准偏差调查的方法。期间更容易变化吗夜间比白天。可变性的特点是两个高峰:postsunset峰值(15% - -50%,相应的3 - 14MHz意味着foF2值)和postmidnight峰(18% - -68%;意味着foF2值)。foF2可变性最大不遵循任何典型的模式(没有特定的季节领先优势)水平的太阳能活动。被观察到在低收入Vanimo站和high-solar-activity年(1986年和1989年,分别)。年(1983年),foF2变化最大观察到马尼拉。冲绳的异常数据,很少或根本没有不同foF2可变性高峰期间低收入和moderate-solar-activity年注意到,foF2变异性增加减少太阳活动站。

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