Results 61 to 70 of about 703 (173)
The statistical properties of spread F observed at Hainan station during the declining period of the 23rd solar cycle [PDF]
Annales Geophysicae, 2010 The temporal variations of the low latitude nighttime spread F (SF) observed by DPS-4 digisonde at low latitude Hainan station (geog. 19.5° N, 109.1° E, dip lat. 9.5° N) during the declining solar cycle 23 from March 2002 to February 2008 are studied.
G. J. Wang +5 more
doaj +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
Polar cap patches observed during the magnetic storm of November 2003: observations and modeling [PDF]
Annales Geophysicae, 2015 We present multi-instrumented measurements and multi-technique analysis of polar cap patches observed early during the recovery phase of the major magnetic storm of 20 November 2003 to investigate the origin of the polar cap patches. During this event,
C. E. Valladares +2 more
doaj +1 more source
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
Automatic Real‐Time Ionogram Scaling Method for Global Ionosondes Using Artificial Intelligence
Space Weather, Volume 24, Issue 5, May 2026.Abstract An ionosonde is an instrument used for local ionosphere remote sensing observations and has the longest history and widest global distribution. Ionograms observed by ionosondes, which depict the electron density profile as a function of virtual height, are critical for ionospheric modeling accuracy and space weather nowcasting.
Peng Liu +6 more
wiley +1 more source
, 2006 Topside ionospheric electron density extrapolation techniques rely on the applied profiler model with different techniques resulting in different profile shape.
Marinov, P. +9 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.Abstract Flares originate from the impulsive release of magnetic energy in the solar atmosphere. The rise in X‐ray flux enhances ionization/electron content in the upper atmosphere, modifying the photochemical and dynamical processes that govern the ionosphere‐thermosphere behavior.
Komal, Duggirala Pallamraju
wiley +1 more source
, 2018 Ionospheric station in Průhonice currently performs its measurements using Digisonda DPS 4D. The vertical profile of the electron concentration can be measured by ionospheric vertical sounding using Ionosonde and Digisonde.
Kouba, Daniel
core
Dataset of Quiet Space Weather Periods for Ionospheric Studies
Earth and Space Science, Volume 13, Issue 4, April 2026.Abstract The ionosphere is a dynamic environment regularly affected from above and from below. This study identifies periods within the years 2000–2023 when the impact from above, driven by space weather, was minimal. The quiet space weather periods have wide usage for two types of ionospheric studies. At first, studies of isolated space weather events
Šimon Mackovjak +12 more
wiley +1 more source
Total Electron Content Measurement Using Digisonde and GNSS
, 2009 The digital pulse ionospheric sounder (Digisonde) of the University of Massachusetts Lowell has been operated in Pruhonice (geographic coordinates 50.0N, 14.6E) since 2004 for ionospheric study.
Kouba, Daniel
core