scholarly journals A regional GPS receiver network for monitoring equatorial scintillation and total electron content

Radio Science ◽  
2001 ◽  
Vol 36 (6) ◽  
pp. 1545-1557 ◽  
Author(s):  
R. M. Thomas ◽  
M. A. Cervera ◽  
K. Eftaxiadis ◽  
S. L. Manurung ◽  
S. Saroso ◽  
...  
Keyword(s):  
Total Electron Content ◽  
Electron Content ◽  
Gps Receiver ◽  
Total Electron

Accuracy of GPS total electron content: GPS receiver bias temperature dependence

Radio Science ◽  
2013 ◽  
Vol 48 (2) ◽  
pp. 190-196 ◽  
Author(s):  
A. Coster ◽  
J. Williams ◽  
A. Weatherwax ◽  
W. Rideout ◽  
D. Herne
Keyword(s):  
Temperature Dependence ◽  
Total Electron Content ◽  
Electron Content ◽  
Gps Receiver ◽  
Total Electron ◽  
Receiver Bias

scholarly journals Variation of Total Electron Content (TEC) in the Quite and Disturbed days and their correlation with Geomagnetic Parameters of Lamjung Station in the year of 2015

BIBECHANA ◽  
2020 ◽  
Vol 17 ◽  
pp. 123-132
Author(s):  
Basu Dev Ghimire ◽  
Narayan Prasad Chapagain ◽  
Vardhan Basnet ◽  
Karan Bhatta ◽  
Balaram Khadka
Keyword(s):  
Lower Bound ◽  
Total Electron Content ◽  
Negative Correlation ◽  
Solar Flux ◽  
Electron Content ◽  
Gps Receiver ◽  
Dual Frequency ◽  
Total Electron ◽  
Positive Correlation ◽  
Dst Index

Total Electron content is measured using a dual frequency GPS receiver in Lamgung (LMJG) Station located at 84.57° longitude and 28.17° latitude of the year 2015 as it is considered as geo-magnetically active year. In this study, diurnal variation of VTEC has been studied separately for quiet and disturbed days and, for the effective study of the case the PRN wise data of VTEC have been also used. The maximum VTEC is seen from 0700 LT to 1100 LT (LT=UT+5.45). PRN wise VTEC is studied taking the lower bound (LB) and upper bound (UB). The correlation of VTEC with Dst index, Kp index and Solar flux have been studied. Positive correlation has been found in disturbed days with Kp index and solar flux but negative correlation with Dst index. Dst index shows positive correlation in quiet days but Kp index shows negative correlation. BIBECHANA 17(2020) 123-132

scholarly journals Gravity waves propagation in the thermosphere observed from electron density profile and total electron content measurements

1997 ◽  
Vol 40 (6) ◽  
Author(s):  
M. Anzidei ◽  
C. Bianchi ◽  
L. Ciraolo ◽  
M. Pezzopane ◽  
C. Scotto
Keyword(s):  
Electron Density ◽  
Total Electron Content ◽  
Gravity Waves ◽  
Density Profile ◽  
Electron Density Profile ◽  
Electron Content ◽  
Gps Receiver ◽  
Total Electron ◽  
Waves Propagation ◽  
Short Periodicity

Ionospheric observations with five minute intervals between ionograms were made during a campaign from 19th to 23rd June 1996 at the Rome station (41.8N, 12.5E). The data obtained from ionospheric vertical sounding have been analysed together with the Total Electron Content (TEC) data obtained by the GPS receiver measurements. Both the apparatus were installed in the same station. Short periodicity phenomena occurring in the considered period were observed and interpreted as resulting from the propagation of AGWs in the thermosphere. TEC and electron density were then analysed during AGWs activity.

scholarly journals SCINDA-GPS derived TEC depletions and amplitude scintillations over Kisumu, Kenya during selected quiet and storm days of 2013 and 2014

2020 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Uluma Edward ◽  
Ndinya Boniface ◽  
Omondi George
Keyword(s):  
Total Electron Content ◽  
Equatorial Region ◽  
Activity Period ◽  
High Solar Activity ◽  
Electron Content ◽  
Vertical Total Electron Content ◽  
Gps Receiver ◽  
Total Electron ◽  
Solar Intensity ◽  
Using Data

Total Electron Content (TEC) depletion and amplitude scintillation (S4) can be derived from, SCINDA-GPS receivers situated in various parts of the equatorial region. In this paper we present results of characterization of TEC depletions and amplitude scintillations over Kisumu, Kenya (Geomagnetic coordinates: 9.64o S, 108.59o E; Geographic coordinates: 0.02o S, 34.6o E) for both selected geomagnetically quiet and geomagnetically disturbed conditions between 1st January 2013 and 31st December 2014 using data derived from the Kisumu NovAtel GSV4004B SCINDA-GPS receiver situated at Maseno University. TEC depletions and amplitude scintillations affect Global Positioning System (GPS) signals in the ionosphere as they propagate from the satellite to the receiver. This study aims to investigate day to day variability of TEC depletions and amplitude scintillations over Kisumu, Kenya during both geomagnetically quiet and geomagnetically disturbed days of 2013 and 2014 which was a high solar activity period for Solar Cycle 24. Seasonal variability of TEC depletions and S4 index is also presented. The Receiver Independent Exchange (RINEX) data for the years 2013 and 2014 was retrieved from the Kisumu SCINDA-GPS receiver, processed to obtain Vertical Total Electron Content (VTEC), S4 and Universal Time (UT) and fed into MATLAB to generate VTEC and S4 plots against UT for each selected quiet and storm day within the 2013 and 2014 period. The obtained results showed a diurnal variation of TEC where TEC was minimum at pre-sunrise, maximum during daytime and minimum during nighttime. The minimum TEC during pre-sunrise and nighttime was attributed to reduced solar intensity while maximum TEC during daytime is attributed to increased solar intensity. Most of the selected quiet and storm days of the years 2013 and 2014 showed TEC depletions and TEC enhancements corresponding with enhanced amplitude scintillations between 1800UT and 20:00UT. This might be attributed to the rapid rise of the F-layer and the increase in the vertical E x B plasma drift due to the Pre-reversal Enhancement (PRE) of the eastward electric field. Post-midnight TEC depletions and amplitude scintillations were observed for some days and this was attributed to the effect of zonal winds which brought post-midnight enhancement of the E x B drift. The percentage occurrence of amplitude scintillations for the selected quiet and storm days exhibited a seasonal dependence with equinoctial months having higher occurrences than the solstitial months. The higher average S4 index during equinoctial months might be attributed to increased solar intensity resulting from the close alignment of the solar terminator and the geomagnetic meridian.  

scholarly journals Study of GPS derived Total Electron Content and Scintillation Index variations over Indian Arctic and Antarctic stations

2013 ◽  
Vol 5 (2) ◽  
pp. 255-264 ◽  
Author(s):  
P. Bhawre ◽  
A. K. Gwal ◽  
A. A. Mansoori ◽  
P. A. Khan
Keyword(s):  
Total Electron Content ◽  
Winter Season ◽  
Scintillation Index ◽  
Activity Period ◽  
Electron Content ◽  
Gps Receiver ◽  
Dual Frequency ◽  
Total Electron ◽  
Ionospheric Variability ◽  
Solar Activity Period

In the present study we have investigated the monthly and seasonal variability of total electron content (TEC) and amplitude scintillation index (S4) over two Indian polar stations Maitri (Antarctic) and Ny-Alesund (Arctic), during the low solar activity period 2008. We have used the Novatel’s dual frequency GPS receiver GSV4004A to accomplish this study. From our analysis we observed that TEC achieves its highest values during the months of November and December while during the month of May and June the lowest values of TEC were recorded at Maitri station. Similarly during summer season the highest values of TEC are recorded while in winter season lowest values of TEC are observed. The scintillations that occurred during the year 2008 at Maitri as well as at Ny-Alesund were generally found to be of weak type (S4?0.1), although few cases of moderate (S4?0.3) and strong (S4?0.5) scintillation were also observed. The occurrence characteristics of scintillations showed that maximum scintillations at Maitri occur during the month of July and August while least scintillations occur during the month of January and February. This type of ionospheric variability can be explained on the basis of solar irradiance at Polar Regions.Keywords: Total electron content; Scintillation index; Polar ionosphere.© 2013 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v5i2.12724        J. Sci. Res. 5 (2), 255-264 (2013)

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