So, are you saying you are going to drive another ground rod next to the dish (which it'll have a wire to) and then another wire directly to the house ground rod by the power meter?
If so, yes, that's acceptable, but each wire should be bonded to each other on the screw they tighten down with. Make sure you are making very good and strong connections. The larger the wire the better. I used 6 gauge solid copper for mine.
IIRC, it doesn't matter whether the wire is insulated or not. It does need to be protected from corrosion and physical damage. NEC 250.64(B) is a tricky one.