The day to day variability for M(3000)F2 parameter of F-region for a low latitude station Darwin(12.47°S,130.85°E)
for the year 2014 considered in the present work. The diurnal, seasonal and monthly variation of M(3000)F2 parameter has
been studied. The standard deviation method is used to analyze the variation of M(3000)F2 parameter. The seasonal variation is
divided into three seasons- winter months, equinoctial months and summer months. In the study it has been found that, the
diurnal percentage deviation of M(3000)F2 is higher during nighttime than day time. For seasonal variation, the variation of
percentage deviation of M(3000)F2 for the nighttime is higher in summer months as compared to winter and equinoctial
months. The percentage deviation of M(3000)F2, for monthly variation is high in November and low in March and September
