Abstract : In this study we have analyzed GPS-TEC data of the year 2011 when the solar cycle24 is in ascending phase. In this study good correlation is found between vertical total electron content (VTEC) and solar activity (solar flux F10.7 cm). In order to show variation of the data, statistical study employing mean (m) and standard deviation (?) approach is employed. In the month of October day time TEC has peak value above m+ ? whereas in the months of January, February and April depletion are seen below m- ?. Further we compared results with IRI 2012 and strong correlation with variations during the three seasons are found.
Keywords : GPS, Activity Periods
Cite : Dubey, N., S., & Pundhir, D. (2024). Diurnal and Seasonal Examination of Gps Based Total Electron Content Recorded at Agra Station In Different Solar Activity Periods (0th ed., pp. 303-307). Noble Science Press. https://doi.org/10.52458/9788197112492.nsp.2024.eb.ch-31
References :
Adebiyi, S.J., Adimula, I. A., Oladipo. O. A., Seasonal variations of GPS derived TEC at three different lattitudes of sutherrn hemisphere during geomagnetic storms. Adv. Sp. Res., 53, 1246-1254, 2014.
Akala, A.O., Seemala, G. K. M, Doherty, P. H., Valladares, C.E., Carrano, C.S., Espinoza, J., Oluyo, S., Comparison of equatorial GPS-TEC observations over an African station and an American station during the minimum and ascending phases of solar cycle24, Ann. Geophys., 31 , 2085-2096 , 2013.
Bagiya, M. S., Joshi, H. P., Iyer, K. N., Aggrawal, M., Ravindran, S., Pathan, B. M. M., TEC variations during low solar activity period (2005-2007) near the equatorial ionospheric anomaly Crest region in India, Ann. Geophys., 27, 1047-1057, 2009.
Huy, M., Le, Amory-Mazaudier, C., Fleury , R., Bourdillon. A., Lassudrie- Duchesne, P., Time variation of the total electron content in the Southeast Asian equatorial ionization ananomaly for the period 2006-2011, Adv. Sp. Res., 54, 355-368, 2014.
Karia, S.P., Patel, N.C., and Pathak, K.N., Comparison of GPS based TEC measurments with the IRI-2012 Model for the period of low to moderate solar activity (2009-2012) at the crest of equatorial anomaly in Indian region, Adv . Sp. Res., 55(8), 1965-1975, 2015.
Kumar , S., Priyadarshi, S., Krishna, S.G., and Singh, A.K., GPS-TEC variations during low solar activity period (2007-2009) at Indian low latitude stations, Astrophys & Space Sci., 339, 165-178, 2012.
Mannucci, A., Wilson, B., Edwards, C., A new method for monitoring the earth’s total electron content using the GPS global network. Proceedings of the ION GPS-93, SaltLake City,Utah, September 22-24, 1323-1332, 1993.
Mukherjee, S., Sarkar , S., Purohit, P.K., Gwal, A.K., Seasonal variation of total electron content at crest of equatorial anomaly station during low solar activity conditions , Adv. Space Res., 46, 291-295, 2010.
Prasad, S. N. V. S., Rama Rao, P.V. S., Prasad, D.S.V.V.D., Venkatesh, K., Niranjan, K., On the variabilities of the total electron content (TEC) over the Indian low latitude sector, Adv. Sp. Res. 49, 898-913, 2012.
Pullinets, S.A., Davidenko, D., Iopnoapheric precursors of earthquakes and Global Electric Circuit Adv. Sp. Res., 53(5), 709-723, 2014.
Ramarao, P.V.S., Gopi Krishna , S., Niranjan, K., Prasad, D.S.V.V.D., Temporal and spatial variations in TEC using simultaneous measurements from the Indian GPS network of receivers during the low solar activity of 2004-2005, Ann. Geophys., 24 , 3279-3292 , 2006.
Rathor, V.S., Kumar, S., Singh, A.K., A statistical comparison of IRI TEC prediction with GPS TEC measurement over Varanasi, India, J . Atmos. Sol. Terr. Phys., ATP4146, 2015.
Sharma, K., Dabas, R.S., and Ravindran, S., Study of total electron content variations over equatorial and low latitude ionosphere during extreme solar minimum, Astrophys Space Sci., 341, 277-286, 2012