Zobrazeno 1 - 10
of 1 594
pro vyhledávání: '"Equatorial ionosphere"'
Autor:
E. E. Pacheco, J. P. Velasquez, R. Flores, L. Condori, G. Fajardo, K. Kuyeng, D. E. Scipion, M. Milla, J. F. Conte, F. L. Poblet, J. L. Chau, J. Suclupe, R. Rojas, E. Manay
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-24 (2024)
Abstract The eruption of the Hunga Tonga Hunga Ha’apai volcano on 15 January 2022 significantly impacted the lower and upper atmosphere globally. Using multi-instrument observations, we described disturbances from the sea surface to the ionosphere
Externí odkaz:
https://doaj.org/article/a4b061c27c0146e49271c77e55d8165d
Autor:
Syau-Yun W. Hsieh, David G. Sibeck
Publikováno v:
Earth and Planetary Physics, Vol 8, Iss 1, Pp 215-221 (2024)
To determine the cause(s) of perturbations seen in dayside equatorial ground magnetograms, we conducted a systematic survey of simultaneous ground-based and geosynchronous satellite-based observations during the 90-day period from December 1, 2020 to
Externí odkaz:
https://doaj.org/article/5a18eb1d50ec42e0b2122ab731f3444e
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 9, Pp n/a-n/a (2024)
Abstract This study investigates the impact of vertical ionospheric drift during daytime on the evolution of predawn equatorial plasma bubbles by conducting model simulations using “Sami3 is Another Model of the Ionosphere.” The upward drift of t
Externí odkaz:
https://doaj.org/article/223a805a3b854bb5aaca58f9c8dfb12c
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
The low latitude ionosphere and thermosphere are strongly disturbed during and shortly after geomagnetic storms. We use novel Jicamarca radar measurements, ACE satellite solar wind, and SuperMAG geomagnetic field observations to study the electrodyna
Externí odkaz:
https://doaj.org/article/f507e8f64913467c980956c247175d48
Publikováno v:
Earth and Planetary Physics, Vol 7, Iss 3, Pp 389-406 (2023)
In this study, we present characteristics of post-sunset GHz scintillation occurrence and their correlations with ionospheric parameters derived from ionosonde observations in high solar activity years (2012−2013) of solar cycle 24 at Sanya (18.3°
Externí odkaz:
https://doaj.org/article/a3814d4366d94e60815b20975c5f2ba4
Autor:
Christina Arras, Laysa Cristina Araújo Resende, Ankur Kepkar, Gethmini Senevirathna, Jens Wickert
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-15 (2022)
Abstract Scintillations in the signal-to-noise (SNR) profiles of GNSS radio occultation (RO) measurements at lower ionospheric altitudes are caused by compact layers of high ionization also known as sporadic E (Es) layers. It is widely accepted that
Externí odkaz:
https://doaj.org/article/d18be26df74144ddb4602f2aa121a6bb
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 14, Pp n/a-n/a (2023)
Abstract In this study employing data from the Swarm satellites at an altitude of ≈500 km, we present evidence of field‐line resonances (FLRs) in the Pc2‐3 (0.02–0.2 Hz) frequency band in the undisturbed post‐sunset region of the equatorial
Externí odkaz:
https://doaj.org/article/8cfbc480cb474e978bf579fe4665c7e3
Autor:
Ojochenemi Ikani, Francisca Nneka Okeke, Kingsley Chukwudi Okpala, Daniel Okoh, Babatunde Rabiu
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
We investigate the occurrence of ionospheric irregularities in Nigeria during 2014, using the Global Navigation Satellite System (GNSS) total electron content (TEC) rate of change index (ROTI). We categorized days with |Dst| < 30 nT as quiet days and
Externí odkaz:
https://doaj.org/article/474d218adf494aaa8b4461209b517d8c
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