Zobrazeno 1 - 10
of 140
pro vyhledávání: '"J. Chum"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 9119-9130 (2024)
The cross-correlation between annual lightning frequency and solar activity and the heliospheric magnetic field (HMF) is examined on a global scale using corrected data from the World Wide Lightning Location Network (WWLLN) for the period 2009 to 202
Externí odkaz:
https://doaj.org/article/31f3445ccf2d49d68de69dd0bd0d72a7
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
During the 2019 Leonid meteor shower, the European Fireball Network recorded a bright fireball (meteor code: EN171119_041459) at 04:15:0.2 (UT) on 17 November 2019. The fireball appeared at coordinates 49.95°N 15.56°E at the height of 134.46 km, an
Externí odkaz:
https://doaj.org/article/5e0f18b2f7ae4701bd24241ca72545e2
Publikováno v:
Earth, Planets and Space, Vol 72, Iss 1, Pp 1-20 (2020)
Abstract High electric fields that occur in thunderstorm clouds in the Earth’s atmosphere might accelerate energetic charged particles produced by cosmic rays. Such energetic particles, especially electrons, can cause additional ionization as they
Externí odkaz:
https://doaj.org/article/8407d9e2b8d942979b242c5a1c9cd82c
Publikováno v:
Annales Geophysicae, Vol 28, Pp 37-46 (2010)
We report a study of penetration of the VLF electromagnetic waves induced by lightning to the ionosphere. We compare the fractional hop whistlers recorded by the ICE experiment onboard the DEMETER satellite with lightning detected by the EUCLID de
Externí odkaz:
https://doaj.org/article/90a9b965ee5f48699894cbabb2594303
Publikováno v:
Annales Geophysicae, Vol 25, Pp 895-904 (2007)
The first joint common volume measurements by the Digisonde Portable Sounder (DPS-4) and a new Doppler type system has been run at the Pruhonice ionospheric observatory (49.99° N, 14.54° E) since January 2004. The measurement of the Doppler shif
Externí odkaz:
https://doaj.org/article/e5305a9796a44b9fa1a758d998ad6619
Publikováno v:
Annales Geophysicae, Vol 24, Pp 2921-2929 (2006)
We study the penetration of lightning induced whistler waves through the ionosphere by investigating the correspondence between the whistlers observed on the DEMETER and MAGION-5 satellites and the lightning discharges detected by the European lig
Externí odkaz:
https://doaj.org/article/8f45f5bb4f6f46ed94a272fdcc5a98b0
Autor:
J. Chum, O. Santolík
Publikováno v:
Annales Geophysicae, Vol 23, Pp 3727-3738 (2005)
We investigate the ray trajectories of nonductedly propagating lower-band chorus waves with respect to their initial angle θ0, between the wave vector and ambient magnetic field. Although we consider a wide range of initial angles θ0, in order t
Externí odkaz:
https://doaj.org/article/072ad41d37e44f8da1b3ea98713ca0fb
Publikováno v:
Annales Geophysicae, Vol 22, Pp 3589-3606 (2004)
The properties of Nu whistlers are discussed in the light of observations by the MAGION 5 satellite, and of numerically simulated spectrograms of lightning-induced VLF emissions. The method of simulation is described in full. With the information
Externí odkaz:
https://doaj.org/article/4168459fa2994680b44532549b359ce2
Publikováno v:
Annales Geophysicae, Vol 21, Pp 2293-2302 (2003)
After reviewing briefly the present state of knowledge about chorus-like emissions, we present an overview of Magion 5 satellite observations of these emissions in the inner magnetosphere of the Earth. From the extensive VLF data recorded on bo
Externí odkaz:
https://doaj.org/article/f7064ce2641b4924b316c96ccd95630d
Publikováno v:
Annales Geophysicae, Vol 23, Pp 3111-3113 (2005)
Data on solar array efficiency measured on board two Czech MAGION micro-satellites between August 1995 and June 2002, during the period of increasing and high solar activity, were used to study the space weather effects on photo-voltaic solar cell
Externí odkaz:
https://doaj.org/article/95a632300f8741c688a71e384fb7635a