OrlandoNative wrote:It's always easier to fight from the TOP of a planetary gravity well than from the BOTTOM. Including the fact that it requires FAR more energy to fire a missile upwards, especially if it's velocity while passing through the atmosphere will cause it to require heat shielding to protect from friction. A projectile *dropping* doesn't require that, and, indeed, the added mass of any shielding merely translates to more momentum converted into energy once gravity has accelerated it and it hits.
That's true, but in the Honorverse extremely high energy systems are common. The fact that you can maneuver a battle cruiser at hundreds of gravities under reaction drive and the fuel lasted as long as shown means that reaction drives are astonishingly effective and efficient.
And once you punch a missile out of the atmosphere, say by using a gravitic mass driver (exactly like a ship uses), once it's past 50 km or so of air it's just like you launched it from a ship. The wedge pops up and the fun starts.
And it's perfectly possible to stop a KE. You can detect it optically on reentry, and a wedge driven missile can easily accelerate enough to catch it well short of the target. Even if you don't destroy it outright, which is the most likely result when the wedge hits it, imparting a upward and sizeways vector of a couple of km/sec is going to make it miss. And yes, assume a 100 kg missile accelerating at 50,000g for a second. You can almost certainly kill anything targeting the ground within 10-15 km.
And a soft xray laser (choosing where there is an atmospheric window) would probably be even more effective. At terarwatt range (which seems well within the capability of the honorverse to make ground/grav mobile given that ship-mounted weapons are about 6 orders of magnitude more powerful) it should pretty efficiently vaporize anything in the atmosphere.