US has an advanced satellite system whereby it can have a clear assessment of different terrains...
Also they may be able to identify missile launches, N-tests etc. through the same (that is why US was embarrassed at not having seen through India's recent N-tests)...
US has a missile shield program which relies heavily on satellite vision...
the real reason is to infiltrate india's brain power and research, techniques adopted, advances made, collaborations done etc.. based on which US would be able to make its military/economic/political decisions...
