Satellite provide of various of information. Is there any satellite that actually provide me the CCN number/ CN number/ supersaturation level of a given area?
As Mohammad said, there is no direct way to get CCN except by estimating the cloud droplet concentration, which has a number of built in assumptions. Cloud optical depth is the total cross sectional area, or nR^2; so divide by the effective radius squared. This assumes what is seen near the top of the cloud column holds throughout the cloud.
Use MODIS. BTW, supersaturation is only a fraction of a percent, an impossible quantity to measure by satellite. Even relative humidity of any accuracy can only be estimated over the range of several km thickness. Remote sensing is rarely the magic wand people want it to be.