Results 71 to 80 of about 723 (151)
Formation and Evolution of Low‐Latitude F Region Field‐Aligned Irregularities During the 7–8 September 2017 Storm: Hainan Coherent Scatter Phased Array Radar and Digisonde Observations [PDF]
, 2018 In this paper, we present a study of the low‐latitude field‐aligned irregularities formation and evolution during the 7–8 September 2017 geomagnetic storm by analyzing data of the very high frequency coherent radar installed at Fuke, Hainan Island of ...
Han Jin +11 more
core +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract We present the first comprehensive multi‐instrument climatological study of quiet‐time equatorial F‐region vertical plasma drifts across South America, a region where the magnetic declination angle varies significantly. Our analysis of well‐established long‐term ground‐based data sets from the Jicamarca incoherent scatter radar spanning 1968 ...
Sophia R. Laranja +6 more
wiley +1 more source
, 2021 <p>These HDF5 files contain complex time series data from HF receptions of a Digisonde Portable Sounder 4D (DPS4D).
Obenberger, Kenneth
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Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract Thunderstorms could cause the irregularities of electron density distributions in the ionosphere by exciting gravity waves and modifying ambient electric field (E‐field). By comparing the DPS‐4D ionosonde observation at 5‐min resolution at Fuke Station in Hainan, China with the lightning detection data, we studied the F‐layer responses to a ...
Zhengwei Cheng +11 more
wiley +1 more source
Comparison of COSMIC measurements with the IRI-2007 model over the eastern Mediterranean region
Journal of Advanced Research, 2013 This paper presents a comparison of the International Reference Ionosphere (IRI-2007) model over the eastern Mediterranean region with peak ionospheric characteristics (foF2–hmF2) and electron density profiles measured by FORMOSAT-3/COSMIC satellites in ...
P. Vryonides, H. Haralambous
doaj +1 more source
Modeling ionograms with deep neural networks: applications to foF2 forecasting [PDF]
, 2021 Poster presented at the 2021 CEDAR Virtual Workshop, June 20-25.The ionosphere state parameters are of fundamental importance not only for radio communication but also for space weather.
Milla, Marco, Aricoché, J., Rojas, E.
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Journal of Space Weather and Space Climate, 2013 A principal possibility to retrieve basic thermospheric parameters (neutral temperature Tex, atomic [O] and molecular [O2] oxygen as well as molecular nitrogen [N2] concentrations) from the observed daytime electron density profiles Ne(h) in the ...
Zolesi Bruno +4 more
doaj +1 more source
Simultaneous observations of irregular sporadic E structures using the LWA and a DPS4D
Frontiers in Astronomy and Space SciencesMulti-instrument studies have recently shed new light on the morphology of sporadic E, especially intense sporadic E. Here we present simultaneous observations of dense sporadic E (Es) structures using the Long Wavelength Array (LWA) radio telescopes and
K. S. Obenberger +9 more
doaj +1 more source
Correlation in f0F2 and M(3000) F2 variations in South-West Europe
Annals of Geophysics, 1996 A statistical analysis of the variations of the hourly daily values of the M(3000)F2 with the corresponding values of critical frequencies f0F2 was provided for two similar ionosondes (Digisonde-256) located in El Arenosillo and Geophysical Observatory ...
E. S. Kazimirovsky +4 more
doaj +1 more source
Exploring the occurrence rate of mesosphere summer like echoes with Digisonde at Tromsø
, 2020 The radar echoes from the polar summer mesopause are observed simultaneously with Digisonde, Dynasonde, and European Incoherent Scatter Scientific Association (EISCAT) very-high-frequency (VHF) radar. The irregular characteristics of sporadic E (Es) layers at altitude range of about 80–90 km observed by Digisonde at Tromsø during 2003 to 2014 are ...
Hailong Li +4 more
openaire +1 more source