GPS observations of ionospheric TEC variations over Nepal during 22 July 2009 solar eclipse

As the study of ionospheric behavior during various solar activities is an important task, studies changes eclipse events have been widely performed in different regions globe. This paper investigates responses to on 22 July 2009 over Nepal using total electron content (TEC) measured by dual-frequency Global Positioning System (GPS) receivers. The time-averaged Vertical TEC (vTEC) ten GPS stations from analyzed and it found that value decreases due reduction ionizing radiation. In addition, deviation day mean vTEC top five quietest days lie range ~1–5 TECu at those which were associated with partial shadow. On other hand, region (BRN2 RMTE) faced ~6–7 average value. Considering occurred just sunrise Nepalese zone, a maximum about 5 very significant. Higher therefore linked path totality obscuration rate. reveals was altered wave-like energy momentum transport, as well disc eclipse. Furthermore, cross-correlation results presented similar type signatures eclipse-induced modification Nepal. research work serves crucial future reference for comparative change variability Eclipse