A Case Study of Comparison of High and Low Solar Active Spread -F Occurrence during Equinoctial Months over a Low Latitude Station Visakhapatnam

B. V. Rama, M. S. S. R. K. N. Sarma, K. Niranjan

Abstract: A case study of comparison of equinoctial months (March, April, September, October) of a high solar active year 2001 (Rz =110.9) and a low solar active year 2007 (Rz =7.6) at a low latitude station Waltair (17.7oN, 83.3oE).

Keywords: Ionosphere, Ionograms, Solar activity, Spread F, Equinoctial months