Results 51 to 60 of about 373,009 (204)
Observation of electron biteout regions below sporadic E layers at polar latitudes [PDF]
Annales Geophysicae, 2015 The descent of a narrow sporadic E layer near 95 km altitude over Poker Flat Research Range in Alaska was observed with electron probes on two consecutive sounding rockets and with incoherent scatter radar during a 2 h period near magnetic midnight.
G. A. Lehmacher +2 more
doaj +1 more source
Thunderstorms and Sporadic E Layer Ionisation
MAUSAM, 1957 The paper describes the results of vertical P'-f recordings of ionospheric reflections carried out during the passage of thunderstorms over Ahmedabad. The thunderstorms were found to be accompanied by an increase in sporadic E ionisation as shown by a rise in the maximum frequency of the Ea or an increase in the intensity of reflection from Es. &
openaire +1 more source
, 2018 . This work presents new results about sporadic E-layers (Es layers) using GPS (global positioning system) radio occultation (RO) measurements obtained from the FORMOSAT-3/COSMIC satellites and digisonde data.
L. Resende +5 more
semanticscholar +1 more source
Coincident extremely large sporadic sodium and sporadic E layers observed in the lower thermosphere over Colorado and Utah [PDF]
Annales Geophysicae, 2007 On the night of 2 June 2002, the sodium lidar in Fort Collins, CO (40.6 N, 105 W) measured an extremely strong sporadic sodium layer lasting from 03:30 to 05:00 UT with several weaker layers later in the night at 06:00 and 09:00 UT.
B. P. Williams +5 more
doaj +1 more source
Earth, Planets and Space, 2016 In the present work, we analyze the competition between tidal winds and electric fields in the formation of blanketing sporadic E layers (Esb) over São Luís, Brazil (2° 31′ S, 44° 16′ W), a quasi-equatorial station.
L. Resende +7 more
semanticscholar +1 more source
Atmosphere, 2022 Statistical GNSS-RO measurements of phase and amplitude scintillation are analyzed at the mid-latitudes in the local summer for a 100 km altitude. These conditions are known to contain frequent sporadic-E, and the S4-σϕ trends provide insight into the ...
Daniel J. Emmons +2 more
doaj +1 more source
IMF effect on sporadic-E layers at two northern polar cap sites: Part I – Statistical study [PDF]
Annales Geophysicae, 2006 In this paper we investigate the relationship between polar cap sporadic-E layers and the direction of the interplanetary magnetic field (IMF) using a 2-year database from Longyearbyen (75.2 CGM Lat, Svalbard) and Thule (85.4 CGM Lat, Greenland). It is
M. Voiculescu +4 more
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Midnight variations of spreading of ionospheric sporadic E-layers before earthquakes
Annals of Geophysics, 2012 <p>In the present study, ionospheric phenomena caused by earthquakes of magnitudes M >4.0 were investigated. Night-time observations of the spreading of sporadic E-layers (Es-spread) performed every 15 min by the Dushanbe and Petropavlovsk ...
Dieter H.H. Hoffmann +5 more
doaj +1 more source
Sporadic-E associated with the Leonid meteor shower event of November 1998 over low and equatorial latitudes [PDF]
Annales Geophysicae, 2001 Rapid radio soundings were made over Ahmedabad, a low latitude station during the period 16–20 November 1998 to study the sporadic-E layer associated with the Leonid shower activity using the KEL Aerospace digital ionosonde.
H. Chandra +6 more
doaj +1 more source
Formation of Multilayered Sporadic E under an Influence of Atmospheric Gravity Waves (AGWs)
Atmosphere, 2020 The formation of multilayered sporadic E by atmospheric gravity waves (AGWs), propagating in the mid-latitude lower thermosphere, is shown theoretically and numerically.
Goderdzi G. Didebulidze +2 more
doaj +1 more source