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Geophysics. Cosmic physics
2
Meteorology. Climatology
2
QC801-809
2
QC851-999
2
electron and ion temperatures
1
electron density
1
f2 layer peak height
1
gnss diagnostics
1
hf radio sounding
1
ionosonde
1
ionospheric irregularities
1
reference model of ionosphere
1
satellite
1
tec
1
tid
1
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