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2018•Unpublished venueOpen access

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

C. M. N. Cândido, Jiankui Shi, Inez Staciarini Batista, F. Becker‐Guedes, E. Correia, Mangalathaiyl A. Abdu, Jonathan J. Makela, Nanan Balan, Narayan P. Chapagain, Chi Wang, Z. Liu

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Abstract

Abstract. We present a case study of unusual spread-F structures observed by ionosondes at two equatorial and low latitude Brazilian stations – Sao Luis (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 post-midnight hours of moderate solar activity (F10.7

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Abstract. We present a case study of unusual spread-F structures observed by ionosondes at two equatorial and low latitude Brazilian stations – Sao Luis (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 post-midnight hours of moderate solar activity (F10.7

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Available abstract

Abstract. We present a case study of unusual spread-F structures observed by ionosondes at two equatorial and low latitude Brazilian stations – Sao Luis (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 post-midnight hours of moderate solar activity (F10.7

Key concepts: Solstice, Midnight, Low latitude, Magnetic dip, Latitude, Atmospheric sciences, Daytime, Environmental science

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