Measurements of Solar Differential Rotation Using the Century Long Kodaikanal Sunspot Data

The rotational profile of the Sun is considered to be one key inputs in a solar dynamo model. Hence, precise and long-term measurements this quantity important for our understanding magnetism its variability. In study, we use newly digitized, white light sunspot data (1923 -- 2011) from Kodaikanal Solar Observatory (KoSO) derive rotation profile. An automated correlation based tracking algorithm implemented measure parameters, $A$, equatorial rate $B$, latitudinal gradient. Our $A=14.381\pm0.004$ $B=-2.72\pm0.04$ compare well with previous studies. analysis, find that bigger sunspots (with area $>$400~$\mu$Hem) rotate slower than smaller ones. At same time, do not any variation rates between activity extremes, i.e maxima minima. Lastly, employ on Michelson Doppler Imager (MDI) MDI results KoSO values.