If you are looking for a good download to use on your computer, go to
http://www.arachnoid.com/satfinder/index. This is the most useful one I have found or been offered. It does not limit you to DBS sats and will work well for any American broadcast sat services (especially VSAT's) as long as you know your sat's name and/or numerical location. BTW this site has plenty of other useful math in it!