You will only get what your ISP Package is. Nothing more, nothing less. Port forwarding can help but it will not increase your speed. It only allows for a direct connection for those programs. So they communicate better, but it doesnt give you a speed boost with your ISP.
So if your connection that you pay for with your Satellite connection has a top speed of only 1Mbps upload, you are only going to get a max of 1Mbps upload. But at best you will get around what you posted. No connection speed is ever what they advertise. Cause that is when you are the closest to the hub for their servers. I am roughly 10 miles from my closest hub and i still dont get the advertised speed for uploading. I get a much faster download speed though.