Pure ground? No way to tell. Most missions are a mix of space and ground in some way. Unless the author says so in the desription you just have to play it.
If you want to gain ground experince I would recommend playing a fleet action. There are a few which are purely ground combat.
If you want to use them for training ignore the objectives and just fight at your own pace.
Those missions are Breaking the Planet, The Dig and DS9 Siege.
Not exactly sure at what level you unlock those.
There is also the Starbase 24 Fleet action, it's a space scenario but leads into a solo/team instance where you have to fight Klingons that continue to spawn. If you can hold your ground there you're pretty much ready to face anything later on.