Results 31 to 40 of about 5,624 (239)
Variations in Ionospheric Parameters Associated With the 20–21 May 2012 Annular and 21 August 2017 Total Solar Eclipses [PDF]
ScientificWorldJournalThis study investigates the ionospheric effects of the annular solar eclipse (20–21 May 2012) and total solar eclipse (21 August 2017) across midlatitude stations, analyzing critical parameters: F2‐layer critical frequency (foF2), peak height (hmF2), and total electron content (TEC).
Limbu M +7 more
europepmc +2 more sources
Unusual Enhancements of NmF2 in Anyang Ionosonde Data [PDF]
Journal of Astronomy and Space Sciences, 2013 Sudden enhancements of daytime NmF2 appeared in Anyang ionosonde data during summer seasons in 2006-2007. In order to investigate the causes of this unusual enhancement, we compared Anyang NmF2’s with the total electron contents (GPS TECs) observed at ...
Jongyeon Yun +4 more
doaj +1 more source
Optimal economic and emission dispatch of photovoltaic integrated power system using firefly algorithm [PDF]
, 2020 The main purpose of Economic Load Dispatch (ELD) is to determine the optimal output of generating units to meet the power demand at lowest possible cost and subjected to the operational constraints. Various ELD optimization methods have been developed in
Muhamad Salim, Muhamad Solahuddin
core
Solar-Terrestrial Physics, 2016 Characteristic U-shaped traces (cusps) on ionograms have been identified as off-angle echoes from sloping electron density contours caused by the presence of traveling ionospheric disturbances (TIDs).
Laryunin O.A.
doaj +1 more source
Performance Analysis of a Portable Low-Cost SDR-Based Ionosonde
Atmosphere, 2023 This work presents a software-defined radio ionosonde (ISDR) developed at the Abdus Salam International Centre for Theoretical Physics (Italy) and the Institute of Radio Astronomy (Ukraine) and installed at the Ukrainian Antarctic Station in 2017.
Oleksandr Koloskov +5 more
doaj +1 more source
New Chung-Li Ionosonde in Taiwan: System Description and Preliminary Results
Remote Sensing, 2022 In spite of being interrupted several times in its long history of operation since 1950, the routine observation of the ionosphere with various ionosondes installed at the Chung-Li ionosphere station in Taiwan has been achieved successively for more than
Kai-Jun Ke +7 more
doaj +1 more source
E3S Web of Conferences, 2018 Intense X-ray fluxes during solar flares are known to cause enhanced ionization in the Earth’s ionospheric D, E and F region. This sudden change of ionospheric electron density profile is serious problem to radio wave communication and navigation system.
Fujimoto Akiko +2 more
doaj +1 more source
Український антарктичний журнал, 2021 Ionospheric Weddell Sea anomaly is an inversion of diurnal variation of the electron density in the ionosphere over Antarctic Peninsula, Weddell Sea, and neighbor territories observed during Antarctic summer.
A. Zalizovski +3 more
doaj +1 more source
Algorithm for high quality ionograms [PDF]
Electronics Letters, 2000 A new ionogram algorithm, which is highly successful in generating robust and sharp digital ionograms free of artefacts and processing noise, is presented. An important feature of the algorithm is the distortionless zooming capability, which allows the user to concentrate only on the desired magnetoionic components of the ionogram.
Arikan F., Salous, S., Arikan, O.
openaire +2 more sources
Frontiers in Astronomy and Space SciencesVertical sounding of the ionosphere yields ionograms that reflects the relationship between virtual height and frequency, and electron density profiles can be obtained by inversion of the ionogram.
Longlong Niu +6 more
doaj +1 more source