The ionosonde data is used to monitor the base height of the F-layer as well as the presence or absence of Spread-F at the time of the appearance of depletions in all sky images.是什么意思_The ionosonde data is used to monitor the base height of the F-layer as well as the presence or absence of Spread-F at the time of the appearance of depletions in all sky images.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句