Yo, Specter of the Lyran Alliance!
Surface to air missiles aren't just for anti-aircraft roles. They also can prevent starships from getting too close to your planet (usually stand off distance is Orbital/ 0-range bands).
An example...
From the GDW TNE Path of Tears, page 151:
"Generally designed as a medium ranged 2-stage air defense missile, and constructed to carry conventional nuclear warhead for use in upper atmosphere against squadrons of attacking aircraft. IN its present incarnation, the PDM uses a salvaged TL-8+ Bomb pumped X-ray laser warhead fitted in place of its former warhead, a process that adds almost 3 more meters to its length in the missile's second stage, and cuts back its range to 221Kms.
The range of the solid-fueled rocket is not important as their function is to lift the warhead out of the atmosphere in the general direction of the incoming target. Each missile locks on a radar guidance signal reflected off the target by a ground station (usually, but not always, one connected to the battery that launched them).
Once out of the atmosphere, the bomb pumped laser works just as the Ship-board versions do. If a Hit is rolled, roll 1D6 for the actual number of hits to the target. AV is the Armor value of the missiles skin.
PDM (planetary Defense Missile)
TL: 6/8
Yield(kt): 10
Mass(tonnes): 24.3
Price (MCr): 0.65
Hits: 1D6
Damage 1/8--25
Range: 0
Guidance: Radar designated
AV: 1
Agility: 4
Under the damage of TNE, "1/8" is interpreted as losing 1 point of damage per 8pts of armor form the over damage total (25). Thus one of these going through a TNE-merchant ship AV: 10 (The T20 equivalent of AR0/ AC10), would be 23 points of damage to the vessel (losing 2 points to penetrate through *+2 points of armor, rounding down).
Other Missiles warheads are detailed out in the GDW-TNE Reformation Coalition Equipment Guidebook & the equipemnt pages of the TNEHandbook--which is available in pdf nowadays at RPG Drivethru iirc.
MT'sCOACC likewise had a wide array of Anti-aircaft missiles, and auto cannons
before getting into the higher tech energy weapons range of AAA.
Hope these help!
