Zobrazeno 1 - 10
of 770
pro vyhledávání: '"N. Jakowski"'
Publikováno v:
Annales Geophysicae, Vol 38, Pp 149-162 (2020)
This study correlates different ionospheric parameters with the integrated solar extreme ultraviolet radiation (EUV) radiation to analyze the delayed ionospheric response, testing and improving upon previous studies on the ionospheric delay. Several
Externí odkaz:
https://doaj.org/article/53ae185df97446d9a9ee951e4725aade
Publikováno v:
Advances in Radio Science, Vol 16, Pp 149-155 (2018)
Physical and chemical processes in the ionosphere are driven by complex interactions with the solar radiation. The ionospheric plasma is in particular sensitive to solar EUV and UV variations with a time delay between one and two days. This delay
Externí odkaz:
https://doaj.org/article/d4f0d9d3bc924e6a9034a8d59f3fd4af
Publikováno v:
Annales Geophysicae, Vol 35, Pp 97-106 (2017)
Small-scale ionospheric disturbances may cause severe radio scintillations of signals transmitted from global navigation satellite systems (GNSSs). Consequently, small-scale plasma irregularities may heavily degrade the performance of current GNSS
Externí odkaz:
https://doaj.org/article/aa6e037e45a449e09f4c1c9d80c4400a
Publikováno v:
Advances in Radio Science, Vol 14, Pp 175-180 (2016)
The ionospheric response to solar extreme ultraviolet (EUV) variability during 2011–2014 is shown by simple proxies based on Solar Dynamics Observatory/Extreme Ultraviolet Variability Experiment solar EUV spectra. The daily proxies are compared wit
Externí odkaz:
https://doaj.org/article/3a3c3f9e24b5417fa57949b5ca310482
Publikováno v:
Annales Geophysicae, Vol 31, Pp 1241-1249 (2013)
Electron density is the major determining parameter of the ionosphere. Especially the maximum electron density of the F2 layer in the ionosphere, NmF2, is of particular interest with regard to the HF radio communication applications as well as for
Externí odkaz:
https://doaj.org/article/7addda22a07040ad98fbb8669160882a
Autor:
M. M. Hoque, N. Jakowski
Publikováno v:
Annales Geophysicae, Vol 30, Pp 797-809 (2012)
The F2-layer peak density height hmF2 is one of the most important ionospheric parameters characterizing HF propagation conditions. Therefore, the ability to model and predict the spatial and temporal variations of the peak electron density height
Externí odkaz:
https://doaj.org/article/11bbc1b532ab4259a9daf3216e5ab55c
Publikováno v:
Annales Geophysicae, Vol 27, Pp 1605-1612 (2009)
This work is a first statistical analysis of large scale traveling ionospheric disturbances (LSTID) in Europe using total electron content (TEC) data derived from GNSS measurements. The GNSS receiver network in Europe is dense enough to map the io
Externí odkaz:
https://doaj.org/article/3fd3d79e50b04c4a80fde72e80dd3019
Autor:
C. Mayer, N. Jakowski
Publikováno v:
Annales Geophysicae, Vol 27, Pp 1207-1212 (2009)
Particle precipitation of magnetospheric origin causes additional ionization in the auroral zone at E-layer heights. During night-time, in particular at winter-night, the E-layer ionization may dominate over the F2-layer ionization level. To
Externí odkaz:
https://doaj.org/article/3ebf4cb45a084c82a877c874338c991d
Publikováno v:
Advances in Radio Science, Vol 5, Pp 393-397 (2007)
Maps of vertically integrated electron density over the higher middle and polar latitudes that are regularly produced by DLR Neustrelitz are investigated with respect to planetary waves (PW) in the period range of several days. The results are compar
Externí odkaz:
https://doaj.org/article/f8ac55e084ce4e4ab428511c39cca606