Postmidnight equatorial plasma irregularities on the June solstice during low solar activity – a case study

Postmidnight equatorial plasma irregularities on the June solstice during low solar activity – a case study

We present a case study of unusual spread-F structures observed by ionosondes at two equatorial and low-latitude Brazilian stations – São Luís (SL: 44.2∘ W, 2.33∘ S; dip angle: −6.9∘) and Fortaleza (FZ: 38.45∘ W, 3.9∘ S; dip angle: −16∘). The irregularity structures observed from midnight to postmid...

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Veröffentlicht in:Annales geophysicae (1988) 2019-07, Vol.37 (4), p.657-672
Hauptverfasser: Candido, Claudia M. N., Shi, Jiankui, Batista, Inez S., Becker-Guedes, Fabio, Correia, Emília, Abdu, Mangalathayil A., Makela, Jonathan, Balan, Nanan, Chapagain, Narayan, Wang, Chi, Liu, Zhengkuan
Format: Artikel
Sprache:eng
Schlagworte:
Advection
Advection (Earth sciences)
Airglow
Case studies
Drift
F region
Interferometers
Ionosondes
Irregularities
Latitude
Solar activity
Solstices
Spread F
Sunset
Wind measurement
Wind speed
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Zusammenfassung:We present a case study of unusual spread-F structures observed by ionosondes at two equatorial and low-latitude Brazilian stations – São Luís (SL: 44.2∘ W, 2.33∘ S; dip angle: −6.9∘) and Fortaleza (FZ: 38.45∘ W, 3.9∘ S; dip angle: −16∘). The irregularity structures observed from midnight to postmidnight hours of moderate solar activity (F10.7 
ISSN:1432-0576
0992-7689
1432-0576
DOI:10.5194/angeo-37-657-2019