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ddc:530
Atmospheric composition and structure (Aerosols and particles
1
Doppler radar
1
Middle atmosphere - composition and chemistry) Ionosphere (Ionospheric irregularities)
1
electron density
1
ground-based measurement
1
ionosphere
1
mesosphere
1
polar mesosphere winter echo
1
spectral analysis
1
statistical analysis
1
summer
1
wind direction
1
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