The Impact of Coronal Mass Ejections on the Seasonal Variation of the Ionospheric Critical Frequency f0F2
We investigated the relations between the monthly average values of the critical frequency
(f0 F2) and the physical properties of the coronal mass ejections (CMEs), then we examined …
(f0 F2) and the physical properties of the coronal mass ejections (CMEs), then we examined …
A prediction model of ionospheric foF2 based on extreme learning machine
H Bai, H Fu, J Wang, K Ma, T Wu, J Ma - Radio Science, 2018 - ieeexplore.ieee.org
The highly nonlinear variation of the ionospheric F 2 layer critical frequency (fo F 2) greatly
limits the efficiency of communications, radar, and navigation systems that employ high …
limits the efficiency of communications, radar, and navigation systems that employ high …
Assessment of improvement of the IRI model for foF2 variability over three latitudes in different hemispheres during low and high solar activities
This paper discusses the diurnal and seasonal variations of the F2 layer critical frequency
(foF2) and the improvement of performance of the IRI-2016 model in predicting foF2 over …
(foF2) and the improvement of performance of the IRI-2016 model in predicting foF2 over …
GPS derived TEC and foF2 variability at an equatorial station and the performance of IRI-model
The ionosphere induces a time delay in transionospheric radio signals such as the Global
Positioning System (GPS) signal. The Total Electron Content (TEC) is a key parameter in the …
Positioning System (GPS) signal. The Total Electron Content (TEC) is a key parameter in the …
Tests of sunspot number sequences: 1. Using ionosonde data
More than 70 years ago, it was recognised that ionospheric F2-layer critical frequencies foF2
had a strong relationship to sunspot number. Using historic datasets from the Slough and …
had a strong relationship to sunspot number. Using historic datasets from the Slough and …
Medium-term ionospheric response to the solar and geomagnetic conditions at low-latitude stations of the East African sector
S Woldemariam, T Gogie - Cogent Engineering, 2023 - Taylor & Francis
In this study, we used GPS-TEC measurements from six stations in East Africa located in
low/equatorial latitudes to investigate medium-term ionospheric response to solar and …
low/equatorial latitudes to investigate medium-term ionospheric response to solar and …
Modelling M (3000) F2 at an African equatorial location for better IRI-model prediction
The F2-layer propagation factor M (3000) F2 is important to ionospheric studies owning to its
use in high High frequency radio communication/ionospheric modeling. This study focused …
use in high High frequency radio communication/ionospheric modeling. This study focused …
[PDF][PDF] Response of GPS-TEC in the African equatorial region to the two recent St. Patrick's day storms
ABSTRACT The 2015 St. Patrick's Day storm is one of the most intense geomagnetic storm
in this present solar cycle (SYM-H=-213nT). In this paper, we investigate the response of the …
in this present solar cycle (SYM-H=-213nT). In this paper, we investigate the response of the …
Modeling and prediction of ionospheric characteristics using nonlinear autoregression and neural network
H Santosa - 2018 - uec.repo.nii.ac.jp
The terrestrial ionosphere from D-region (60 km) to F-region (500 km) plays an important
role in radio wave propagation between the Earth and ionosphere. During the last half …
role in radio wave propagation between the Earth and ionosphere. During the last half …
[PDF][PDF] Comparative Study of F2–Layer Critical Frequency: Solar Cycle 22: F2–Layer Critical Frequency
SA Jilani, K Khursheed, K Mukhtar - … of the Pakistan Academy of Sciences …, 2018 - paspk.org
This study pertained to the relationship between critical frequency of F2 layer (foF2) and
solar activity indices at three low latitude ionospheric stations during solar cycle 22 (1985 …
solar activity indices at three low latitude ionospheric stations during solar cycle 22 (1985 …