Migrating and nonmigrating tidal signatures in sporadic E layer occurrence rates [PDF]
Advances in Radio Science, 2023 Abstract. 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 shear in the presence of tides, and the strongest signals are the migrating diurnal and semidiurnal ...
Christoph Jacobi +2 more
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A case study of a sporadic sodium layer observed by the ALOMAR Weber Na lidar [PDF]
Annales Geophysicae, 2008 Several possible mechanisms for the production of sporadic sodium layers have been discussed in the literature, but none of them seem to explain all the accumulated observations.
H. Nesse +11 more
doaj +1 more source
The formation of sporadic E layers by a vortical perturbation excited in a horizontal wind shear flow [PDF]
Annales Geophysicae, 2008 The formation of the mid-latitude sporadic E layers (Es layers) by an atmospheric vortical perturbation excited in a horizontal shear flow (horizontal wind with a horizontal linear shear) is investigated.
G. G. Didebulidze, L. N. Lomidze
doaj +1 more source
Comparison of sporadic sodium layer characteristics observed at different time resolutions [PDF]
Annales Geophysicae, 2013 Sporadic sodium (Nas) layers, occurring in roughly the same height range as ionospheric sporadic-E layers, were first detected by lidar some 30 yr ago.
Y. J. Liu +3 more
doaj +1 more source
Radio tomographic imaging of sporadic-E layers during SEEK-2 [PDF]
Annales Geophysicae, 2005 During the SEEK-2 Rocket Campaign in August 2002, a Dual Band Beacon (DBB) transmitting to Ground Receivers provided unique data on E-Region electron densities.
P. A. Bernhardt +10 more
doaj +1 more source
Simultaneous observation of sporadic E with a rapid-run ionosonde and VHF coherent backscatter radar [PDF]
Annales Geophysicae, 2006 During the SEEK 2 rocket campaign, ionograms were recorded every minute at the Yamagawa Radio Observatory at about 90km west of the region monitored by a VHF (very high frequency) coherent backscatter radar.
T. Maruyama +3 more
doaj +1 more source
Modification Of Sporadic E-Layers Caused By Seismic Activity [PDF]
Surveys in Geophysics, 2000 Among all earthquake precursors, those related to electromagneticeffects are the most puzzling, and the many possible sources ofnoise are cause of lively controversies. A large number oflaboratory experiments clearly suggest that micro-fracturingis associated with the appearance of spontaneous charge production(electrification) and transient Electric ...
Pochotelov, O +6 more
openaire +4 more sources
Evidence for the Magnetoionic Nature of Oblique VHF Reflections from Midlatitude Sporadic-E Layers
Atmosphere, 2022 Mid-latitude sporadic-E (Es) is an intermittent phenomenon of the lower E region of the ionosphere. Es clouds are thin, transient, and patchy layers of intense ionization, with ionization densities which can be much higher than in the background ...
C. Deacon +3 more
semanticscholar +1 more source
Sporadic E signatures revealed from multi-satellite radio occultation measurements [PDF]
Advances in Radio Science, 2010 Radio occultation measurements performed by the satellites CHAMP, GRACE and FORMOSAT-3/COSMIC provide a huge data set for atmospheric and ionospheric investigations on a global scale.
C. Arras +4 more
doaj +1 more source
Sporadic E Layer with a Structure of Double Cusp in the Vertical Sounding Ionogram
Atmosphere, 2021 In this study, we analyzed a large number of vertical sounding ionograms, obtained by the mid-latitude Cyclone ionosonde (55.85° N; 48.8° E) of Kazan (Volga Region) Federal University, which operates in a rapid-run mode of ionograms (1 ionogram per ...
Kamil M. Yusupov +1 more
doaj +1 more source