Thanks for posting that Derek. He is correct, please ONLY post 1 thread per question in the appropriate section. A Rx question shouldn't be posted in the ESC section. If you posted there by accident, then make a reply asking for it to be moved to the proper section. we will be more than happy to move it for you. We are only human after all.
As for your question, they are both antennas, the longer one is made to be curved around and point in a perpendicular direction to the short one. If I had my 600 here with me, I could post a picture. Maybe tomorrow. The AR7200BX doesn't come with a satellite, but does have a port where you can plug a satellite into it. If you are running a 500 heli or larger, then you really need to be running an extra satellite rx just to keep from losing signal.