Statistical analysis of TEC perturbations over a low latitude region during 2009–2013 ascending solar activity phase
Loading...
Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
Advances in Space Research
Abstract
Total Electron Content (TEC) perturbations are manifestations of ionospheric irregularities which induce fluctuations in the amplitude
and phase of trans-ionospheric radio signals. TEC data derived from Global Positioning System (GPS) receivers at Mbarara (Geogra.
0.60 N, 30.74 E and Geomag. 10.22 N, 102.36 E) and Entebbe (Geogra. 0.04 N, 32.44 E and Geomag. 9.53 N, 104.10 E) from
2009 to 2013 were used to study TEC perturbations over the low latitude region of Uganda. The results show that the frequency of
occurrence of TEC perturbations of >4 TECU increased steadily from 2009 to 2013. TEC perturbations with amplitude <4 TECU
occurred at all times. The likelihood of TEC perturbations exceeding 6 TECU was higher during the equinoxes than during the solstices
in most of the years. Comparison of TEC perturbations with 10.7 cm solar radio flux (F10.7) data showed a weak positive correlation with
this solar proxy. Wavelet analysis performed on the TEC perturbations revealed wave-like oscillations with periods typical of Traveling
Ionospheric Disturbances (TID). These wave-like structures (WLS) dominated from 13:00 to 19:00 LT for most of the years analyzed.
Description
Keywords
Total Electron Content, Low-latitude TEC perturbations, Traveling Ionospheric Disturbances
Citation
Andima, G., Jurua, E., Amabayo, E. B., & Habarulema, J. B. (2015). Statistical analysis of TEC perturbations over a low latitude region during 2009–2013 ascending solar activity phase. Advances in Space Research, 56(11), 2542-2551. http://dx.doi.org/10.1016/j.asr.2015.09.021