Baron, not sure if it would have helped, but next time that happens emergency build some missle sats. His missle frigates would not have been able to target them, and while it was busy bLasting the planet your sats could knock out the frigates.
Unless of course you had the bad luck of your sats being launched on the wrong side of the planet and being out of range.
Sometimes there is nothing you can do.
Geoschmo