Variability of foF2 at Low Latitude Locations

Day-to-day variability in the critical frequency of F-layer (foF2) at low latitude locations studied at different states along with the Indian low latitudes and compared with other results. The day time values of foF2 are mainly controlled by the equatorial electrodynamics and the subsequent development of equatorial ionization anomaly the higher values during night-time seen to be due to the variability in the thermopheric neutral temperature and winds.