Supporting grad studies/financial aid

[interferometry]

Hi,

I am a new member of this forum.......

I want to know whether most of the students get financial assistance after going to the us univs or not!!!!!!!! its a very important concern for me...i dont plan to fund my studies for the whole MS and i need support atleast from second sem....assuming that the univs are decent and ranked can one expect financial aid later if performs well in GPA????????????????how students manage to sustain themselves there????

awaiting replies....