scholarly journals GPS TEC response to Pc4 “giant pulsations”

2016 ◽  
Vol 121 (2) ◽  
pp. 1722-1735
Author(s):  
Chris Watson ◽  
P. T. Jayachandran ◽  
Howard J. Singer ◽  
Robert J. Redmon ◽  
Donald Danskin
Keyword(s):  
Gps Tec ◽  
Giant Pulsations

Analysis of traveling ionospheric disturbances (TIDs) in GPS TEC launched by the 2011 Tohoku earthquake

Radio Science ◽  
2016 ◽  
Vol 51 (5) ◽  
pp. 507-514 ◽  
Author(s):  
Geoff Crowley ◽  
Irfan Azeem ◽  
Adam Reynolds ◽  
Timothy M. Duly ◽  
Patrick McBride ◽  
...  
Keyword(s):  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
Ionospheric Disturbances ◽  
The 2011 Tohoku Earthquake ◽  
Gps Tec ◽  
Traveling Ionospheric Disturbances

Comparison of GPS-TEC observations over Addis Ababa with IRI-2012 model predictions during 2010–2013

2015 ◽  
Vol 56 (8) ◽  
pp. 1686-1698 ◽  
Author(s):  
A.O. Akala ◽  
E.O. Somoye ◽  
A.O. Adewale ◽  
E.W. Ojutalayo ◽  
S.P. Karia ◽  
...  
Keyword(s):  
Addis Ababa ◽  
Gps Tec ◽  
Model Predictions

Characterization of low latitude GPS-TEC during very low solar activity phase

2010 ◽  
Vol 72 (17) ◽  
pp. 1309-1317 ◽  
Author(s):  
Praveen Galav ◽  
N. Dashora ◽  
S. Sharma ◽  
R. Pandey
Keyword(s):  
Solar Activity ◽  
Low Latitude ◽  
Gps Tec ◽  
Activity Phase

GPS-TEC variations, generated in midlatitude and highlatitude ionosphere by powerful HF-heating

2011 ◽  
Author(s):  
V. E. Kunitsyn ◽  
A. M. Padokhin ◽  
E. S. Andreeva ◽  
V. L. Frolov ◽  
G. P. Komrakov ◽  
...  
Keyword(s):  
Gps Tec ◽  
Hf Heating

THE INVESTIGATION OF THE PG PULSATIONS WITH USING DATA OF ARASE, GOES SATELLITES AND GROUND-BASED STATIONS

2021 ◽  
Vol 44 ◽  
pp. 63-66
Author(s):  
V.B. Belakhovsky ◽  
◽  
V.A. Pilipenko ◽  
K. Shiokawa ◽  
Y. Miyoshi ◽  
...  
Keyword(s):  
Geomagnetic Field ◽  
Conjugate Point ◽  
Physical Nature ◽  
Recovery Phase ◽  
Radial Component ◽  
Field Lines ◽  
Using Data ◽  
Giant Pulsations ◽  
Favorable Conditions ◽  
Phase Relationships

The physical nature of Pg (pulsation giant) pulsations, which were observed in the magnetosphere by the Japanese satellite Arase, geostationary satellites GOES, and ground stations of the THEMIS and CARISMA networks, was investigated in this work. Pg pulsations belong to the Pc4 frequency range and are characterized by a very monochromatic shape. For the event on 5 June, 2018, according to the data from the Arase satellite, the Pg pulsation wave packet was recorded in the dawn sector during 3 hours. The pulsations are most pronounced in the radial component of the geomagnetic field, their frequency was about 11 mHz. Pg pulsations observed in the magnetosphere were accompanied by pulsations with the same period according to data from a number of ground-based magnetic stations located near the conjugate point. According to the data of ground stations, the pulsations were most strongly expressed in the Y-component of the geomagnetic field. Pg pulsations were accompanied by pulsations in electron and proton fluxes according to the Arase, GOES satellite observations. There are no clear phase relationships between geomagnetic pulsations and pulsations in charge particle fluxes. Pg pulsations were excited under quiet geomagnetic conditions (SYM-H = -10 nT, AE = 100-400 nT) on the recovery phase of the small geomagnetic storm. It is assumed that the expansion of the plasmasphere at low geomagnetic activity leads to an increase in the plasma density in the region of the geostationary orbit, which creates favorable conditions for the excitation of Pg pulsations due to the drift-bounce resonance of protons with the geomagnetic field lines oscillations in the magnetosphere.

scholarly journals Comparison of GPS TEC with IRI models of 2007, 2012, AND 1 2016 over Sukkur, Pakistan

2020 ◽  
Vol 1 (1) ◽  
pp. 1-10
Author(s):  
Adil Hussain ◽  
Munawar Shah
Keyword(s):  
Global Positioning System ◽  
Electron Content ◽  
Iri Model ◽  
Low Latitude ◽  
Total Electron ◽  
Gps Tec ◽  
Global Positioning ◽  
Radio Signals ◽  
Ionospheric Scintillations ◽  
Latitude Region

The international reference ionosphere (IRI) models have been widely used for correcting the ionospheric scintillations at different altitude levels. An evaluation on the performance of VTEC correction from IRI models (version 2007, 2012 and 2016) over Sukkur, Pakistan (27.71º N, 68.85º E) is presented in this work. Total Electron Content (TEC) from IRI models and GPS in 2019 over Sukkur region are compared. The main aim of this comparative analysis is to improve the VTEC in low latitude Sukkur, Pakistan. Moreover, this study will also help us to identify the credible IRI model for the correction of Global Positioning System (GPS) signal in low latitude region in future. The development of more accurate TEC finds useful applications in enhancing the extent to which ionospheric influences on radio signals are corrected. VTEC from GPS and IRI models are collected between May 1, 2019 and May 3, 2019. Additionally, Dst and Kp data are also compared in this work to estimate the geomagnetic storm variations. This study shows a good correlation of 0.83 between VTEC of GPS and IRI 2016. Furthermore, a correlation of 0.82 and 0.78 is also recorded for IRI 2012 and IRI 2007 respectively, with VTEC of GPS. The IRI TEC predictions and GPS-TEC measurements for the studied days reveal the potential of IRI model as a good candidate over Pakistan.

scholarly journals Comparative study of GPS-TEC smoothing techniques

2015 ◽  
Vol 51 (4) ◽  
pp. 659-670
Author(s):  
Mohamed Abdelazeem ◽  
Rahmi N. Çelik ◽  
Ahmed El-Rabbany
Keyword(s):  
Comparative Study ◽  
Smoothing Techniques ◽  
Gps Tec
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