Dynamics, chemistry, and modeling studies in the aviation and aerospace transition zone.

156 , 157 The seasonal variation of the sodium atomic layer exhibits annual or semiannual characteristics, and the diurnal variation shows a clear trend of diurnal and semidiurnal tides, and the sodium atomic layer also responds to the 27-day solar rotation period. 158 , 159 , 160 , 161 , 162 Due to the short time span of observation data, there are relatively limited studies on solar activity and long-term changes in the sodium atomic layer, with

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