Zobrazeno 1 - 10
of 131
pro vyhledávání: '"C. Amory-Mazaudier"'
Publikováno v:
Annales Geophysicae, Vol 39, Pp 743-758 (2021)
In this study, we analyse the climatology of ionosphere over Nepal based on GPS-derived vertical total electron content (VTEC) observed from four stations as defined in Table 1: KKN4 (27.80∘ N, 85.27∘ E), GRHI (27.95∘ N, 82.49∘ E), JMSM (28.8
Externí odkaz:
https://doaj.org/article/327d6eb7b3f349cb846feb032af0bb0d
Publikováno v:
Earth and Space Science, Vol 7, Iss 7, Pp n/a-n/a (2020)
Abstract This paper investigated the behavior of ionospheric irregularities over the African equatorial ionization anomaly (EIA) crests during intense geomagnetic storms that occurred from 2012 to 2015. Irregularities were monitored using the rate of
Externí odkaz:
https://doaj.org/article/69fb60b1916a45ea99534fe0994619a3
Publikováno v:
Annales Geophysicae, Vol 35, Pp 39-51 (2017)
In this study we examined the influences of geomagnetic activity on the Earth surface electric field variations at low latitudes. During the International Equatorial Electrojet Year (IEEY) various experiments were performed along 5° W in West Afri
Externí odkaz:
https://doaj.org/article/e26038120a9c4a8c863ca39dc0e8e97d
Publikováno v:
Annales Geophysicae, Vol 33, Pp 143-157 (2015)
In this paper, we report on the night-time equatorial F-layer height behaviour at Korhogo (9.2° N, 5° W; 2.4° S dip lat), Ivory Coast, in the West African sector during the solar minimum period 1995–1997. The data were collected from quarter-
Externí odkaz:
https://doaj.org/article/91b731e6cca24ce4ba549b18f89af725
Publikováno v:
Annales Geophysicae, Vol 29, Pp 2225-2233 (2011)
It has been largely investigated and established that the DP2 events are enhanced at dip-equator compared to low latitudes. Studies by several authors showed various enhancement ratio values of DP2 amplitude at the dayside dip-equator relative to
Externí odkaz:
https://doaj.org/article/b3dab94d2ab94e76b858d0e7fc721b72
Publikováno v:
Annales Geophysicae, Vol 29, Pp 197-207 (2011)
This study is the first which gives the climatology of the ionosphere at the northern tropical crest of ionization in the Asian sector. We use the data from Phu Thuy station, in Vietnam, through three solar cycles (20, 21 and 22), showing the comp
Externí odkaz:
https://doaj.org/article/e287908573dc49e99fb32d7e495a2dfa
Publikováno v:
Annales Geophysicae, Vol 29, Pp 1-17 (2011)
Quiet days variations in the Earth's magnetic field (the Sq current system) are compared and contrasted for the Asian, African and American sectors using a new dataset from Vietnam. This is the first presentation of the variation of the Earth's ma
Externí odkaz:
https://doaj.org/article/d1912ded82ee40ba90a31bdf510f8807
Publikováno v:
Annales Geophysicae, Vol 27, Pp 2503-2514 (2009)
This study is the first which gives the climatology of West African equatorial ionosphere by using Ouagadougou station through three solar cycles. It has permitted to show the complete morphology of ionosphere parameters by analyzing yearly variat
Externí odkaz:
https://doaj.org/article/b26f51c8eac5419dad03e546bf5f050b
Publikováno v:
Annales Geophysicae, Vol 27, Pp 2045-2051 (2009)
The analysis of the aa index series presented in this paper clearly shows that during the last century (1900 to 2000) the number of quiet days (Aa The quiet days and very quiet days correspond to periods during which the Earth encounters slow s
Externí odkaz:
https://doaj.org/article/e9257e59bd4c41c4834fef7f9b7632ea
Publikováno v:
Annales Geophysicae, Vol 26, Pp 1777-1792 (2008)
We study equatorial night-time F layer behaviour from quarter-hourly ionograms at Korhogo/Ivory Coast (9.2° N, 5° W, dip lat. −2.4°) during local Spring March–April 1995, declining solar flux period, according to the magnetic activity. The
Externí odkaz:
https://doaj.org/article/b99184ec45554d22b8317b82b8ecee61