Rumajyoti Hazarika

TL;DR: In this article, the authors used GPS dual frequency measurements during the ascending half of the solar cycle 24 from 2009 to 2012 over Dibrugarh (27.5°N, 94.9°E; 17.6°N MLAT) to study the diurnal, seasonal, annual and solar cycle variation of TEC.

TL;DR: In this paper, the effects of the St. Patrick's Day geomagnetic storms of 2013 and 2015 in the equatorial and low-latitude regions of both hemispheres in the 100°E longitude sector is investigated and compared with the response in the Indian sector at 77°E.

TL;DR: The role of electrodynamical/neutral-dynamical and compositional disturbances are discussed in view of these observations to understand low-latitude ionospheric response when geomagnetic disturbance persists for longer duration.

TL;DR: In this paper, GPS TEC measured at Dibrugarh from 2009 to 2014 is used to study its temporal characteristics during the ascending half of solar cycle 24, and the measurements provide an opportunity to assess the diurnal, seasonal and long-term predictability of the IRI 2012 (with IRI Nequick, IRI01-corr and IRI 2001 topside options) during this solar cycle which is distinctively low in magnitude compared to the previous cycles.

TL;DR: In this article, total electron content measured simultaneously at 10 locations over India during the low solar activity year 2005 is used to examine the temporal and spatial asymmetries and also to assess the predictability of the International Reference Ionosphere in respect of the observed asymmetrical distribution.