Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Christina Arras"'
Autor:
Sahar Sobhkhiz‑Miandehi, Yosuke Yamazaki, Christina Arras, Yasunobu Miyoshi, Hiroyuki Shinagawa
Publikováno v:
Earth, Planets and Space, Vol 75, Iss 1, Pp 1-5 (2023)
Externí odkaz:
https://doaj.org/article/e2790081a10f4a25bf693c7f412439c7
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
Autor:
Sahar Sobhkhiz-Miandehi, Yosuke Yamazaki, Christina Arras, Yasunobu Miyoshi, Hiroyuki Shinagawa
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-13 (2022)
Abstract Sporadic E or Es is a transient phenomenon where thin layers of enhanced electron density appear in the ionospheric E region (90–120 km altitude). The neutral wind shear caused by atmospheric tides can lead ions to converge vertically at E
Externí odkaz:
https://doaj.org/article/6eccd4ac68f84031a7807b44a9371726
Autor:
Laysa C. A. Resende, Yajun Zhu, Christina Arras, Clezio M. Denardini, Sony S. Chen, Juliano Moro, Diego Barros, Ronan A. J. Chagas, Lígia A. Da Silva, Vânia F. Andrioli, José P. Marchezi, Alexander J. Carrasco, Chi Wang, Hui Li, Zhengkuan Liu
Publikováno v:
Atmosphere, Vol 13, Iss 10, p 1714 (2022)
The development of sporadic-E (Es) layers over five Digisonde stations in the American sector is analyzed. This work aims to investigate the dynamic of such layers during the days around the geomagnetic storm that occurred on 8 September 2017. Theref
Externí odkaz:
https://doaj.org/article/cfdaec8aba0647f98d0ad4b44627b361
Autor:
Jens Wickert, Grzegorz Michalak, Torsten Schmidt, Georg Beyerle, Chio-Zong Cheng, Sean B. Healy, Stefan Heise, Cheng-Yung Huang, Norbert Jakowski, Wolfgang Kohler, Christoph Mayer, Dave Offiler, Eiji Ozawa, Alexander G. Pavelyev, Markus Rothacher, Byron Tapley, Christina Arras
Publikováno v:
Terrestrial, Atmospheric and Oceanic Sciences, Vol 20, Iss 1, p 035 (2009)
The Taiwan/US FORMOSAT-3/COSMIC (FORMOsa SATellite mission - 3/Constellation Observing System for Meteorology, Ionosphere and Climate) satellite nstellation was successfully launched on 14 April 2006. It is expected to leverage the use of the GPS (Gl
Externí odkaz:
https://doaj.org/article/1291be2f7e2a42bdb062879e629cfd51
Publikováno v:
Advances in Radio Science
We analyse sporadic E (ES) layer occurrence rates (OR) obtained from ionospheric GPS radio occultation measurements by the FORMOSAT-3/COSMIC constellation. Maximum OR are seen at 95–105 km altitude. Midlatitude ES layers are mainly due to wind shea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0fe2a80abb2fd485f7f094462c1f0f03
https://doi.org/10.5194/ars-20-85-2023
https://doi.org/10.5194/ars-20-85-2023
The characteristics of equatorial plasma bubbles, which occur during the nighttime and along the course of the geomagnetic equator in the F-region of the ionosphere, are investigated using space-based GPS radio occultation measurements from the Formo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0925a623d46a0c290f22d6590b60d1e1
https://doi.org/10.5194/iag-comm4-2022-22
https://doi.org/10.5194/iag-comm4-2022-22
Autor:
Yosuke Yamazaki, Christina Arras, Satoshi Andoh, Yasunobu Miyoshi, Hiroyuki Shinagawa, Brian J. Harding, Christoph R. Englert, Thomas J. Immel, Sahar Sobhkhiz-Miandehi, Claudia Stolle
Publikováno v:
Abstracts
The formation of a sporadic-E (Es) layer at mid and low latitudes is generally attributed to the vertical wind shear, which is predicted to cause vertical ion convergence. According to wind shear theory, a negative shear of the eastward wind is effec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7543e5bde84ca4fced9dcabf4bf148ee
https://doi.org/10.5194/egusphere-egu22-8954
https://doi.org/10.5194/egusphere-egu22-8954
Publikováno v:
Oral and Poster Programme
In the lower ionospheric E region, shallow regions of high electron density are found, which are called sporadic E (ES) layers. ES layers consist of thin clouds of accumulated ions. They occur mainly at middle latitudes, and they are most frequently
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::add8480ec337439ef4fde7b7f1f59da8
https://doi.org/10.5194/dach2022-108
https://doi.org/10.5194/dach2022-108
Autor:
Christoph Jacobi, Christina Arras
Publikováno v:
Advances in Radio Science, Vol 17, Pp 213-224 (2019)
Advances in Radio Science
Advances in Radio Science
We analyze tidal (diurnal, semidiurnal, terdiurnal, quarterdiurnal) phases and related wind shear in the mesosphere/lower thermosphere as observed by meteor radar over Collm (51.3∘ N, 13.0∘ E). The wind shear phases are compared with those of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fea20d8488f5eb41603b85dc30424e2a
https://www.adv-radio-sci.net/17/213/2019/ars-17-213-2019.pdf
https://www.adv-radio-sci.net/17/213/2019/ars-17-213-2019.pdf