I don't think so, but as with many limitations of aurora you can role play and use spacemaster to add some extra flavour. Add some ground troops to any planet that's received heavy enemy assaults, create some rules you'll follow to decide how many Bd what type of ground units to use, maybe based on number of ships, their tonnage, how long they stayed in orbit, add some randomness, etc. Shouldn't really be a deal breaker if you can tolerate a little micro management.
