Results 21 to 30 of about 853 (193)

Comparison of the measured and modeled electron densities, and electron and ion temperatures in the low-latitude ionosphere during 19-21 March 1988 [PDF]

open access: yesAnnales Geophysicae, 2004
We have presented a comparison between the modeled NmF2 and hmF2, and NmF2 and hmF2 which were observed at the equatorial anomaly crest and close to the geomagnetic equator simultaneously by the Akita, Kokubunji, Yamagawa, Okinawa, Chung-Li, Manila ...
A. V. Pavlov, S. Fukao, S. Kawamura
doaj   +1 more source

Global Comparison of F2-Layer Peak Parameters Estimated by IRI-2016 With Ionospheric Radio Occultation Data During Solar Minimum

open access: yesIEEE Access, 2021
The F2-layer peak parameters of the International Reference Ionosphere (IRI) model are critical to its subsequent applications because of the vital role of the peak parameters in determining other IRI model outputs. Therefore, we analyzed the statistical
Weihua Bai   +12 more
doaj   +1 more source

Multi-Dimension and Multi-Channel Seismic-Ionospheric Coupling: Case Study of Mw 8.8 Concepcion Quake on 27 February 2010

open access: yesRemote Sensing, 2021
GPS radio occultation (RO) technology can fully describe the subtle structure of the ionosphere. This paper discusses the dynamic abnormity observed by the RO data from the Constellation Observing System for Meteorology Ionosphere and Climate (FORMOSAT-3/
Kunpeng Shi   +5 more
doaj   +1 more source

Comparative study of the polar region ionospheric NmF2 and IRI-2016 models

open access: yesJournal of Physics: Conference Series, 2022
Abstract The propagation of radio waves can be significantly affected by the ionosphere, which have a serious impact on broadcasting, communication, positioning and navigation. The International Reference Ionosphere (IRI) provides multiple ionospheric parameters for given location, time and date.
Xiaoqian Liao, Sheng Xu
openaire   +1 more source

Variability of NmF2 and its correlation with solar and geomagnetic variations at an equatorial station in the African sector [PDF]

open access: yes, 2021
This study focuses on the variability of NmF2 and the impact of the solar and geomagnetic activity on the variability of NmF2 over Ouagadougou, an equatorial ionisation anomaly station in the African sector.
Olayinka, Olawepo Adeniji; Department of Physics, University of Ilorin, P M B 1515, Ilorin,Kwara State, Nigeria   +2 more
core   +1 more source

Ionospheric Behaviors Over Korea Peninsula During the Super Geomagnetic Storm Using GPS Measurements [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
The super-geomagnetic storms called 2003 Halloween event globally occurred during the period of 29 through 31 which are the following days when the solar flares of X18 class exploded on 28 October 2003.
Jong-Kyun Chung   +4 more
doaj   +1 more source

Application of the Fengyun 3 C GNSS occultation sounder for assessing the global ionospheric response to a magnetic storm event [PDF]

open access: yesAtmospheric Measurement Techniques, 2019
The rapid advancement of global navigation satellite system (GNSS) occultation technology in recent years has made it one of the most advanced space-based remote sensing technologies of the 21st century.
W. Bai   +35 more
doaj   +1 more source

GITM‐Data Comparisons of the Depletion and Enhancement During the 2017 Solar Eclipse

open access: yesGeophysical Research Letters, 2018
The total solar eclipse of 21 August 2017 was simulated with the Global Ionosphere‐Thermosphere Model (GITM), and the results were compared with the total electron content (TEC) measurements provided by the Global Navigation Satellite System, as well as ...
Chen Wu   +3 more
doaj   +1 more source

Anomalous variations of NmF2 over the Argentine Islands: a statistical study [PDF]

open access: yes, 2009
We present a statistical study of variations in the F2-layer peak electron density, NmF2, and altitude, hmF2, over the Argentine Islands ionosonde. The critical frequencies, foF2, and, foE, of the F2 and E-layers, and the propagation factor, M(3000)F2,
N. M. Pavlova, A. V. Pavlov
core   +2 more sources

Investigation of the Topside Ionosphere over Cyprus and Russia Using Swarm Data

open access: yesRemote Sensing, 2023
Using the topside electron density (Ne) measurements recorded over Cyprus and Russia, we investigate the latitudinal variation in the topside electron density during the interval 2014–2020, encompassing a period of high-to-low solar activity.
Haris Haralambous   +3 more
doaj   +1 more source

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