The statistical data gathered by the satellite is comprehensive and detailed. But what if I need to decipher a few terminologies mentioned there. Is there any easy way to get it done. Please help me out with that.

In my opinion, using a single forum to answer a comprehensive problem like a drought is quite an immature thing to do. The reasons to drought are many, and among them, climate change is quite the most crucial one. So before to come to predict any upcoming drought, you need to understand the atmosphere of the particular region to you are considering.