Equidistant Satellites from Launch
This is a quick walkthrough about how you might calculate equidistant launches for a kOS-driven satellite network.
Note: It's unlikely that this will work perfectly. Tiny variations in how KSP handles air resistance, computing physics, etc, means that you'll still want to perform some minor corrections once these things get to orbit. This is the epitome of "sensitivity to initial conditions"
Let's assume that we want to get four satellites equally spaced from launch. For convenience, we'll also assume that the orbital period is 360 seconds (you can get the real orbital period you're looking for using
SHIP:OBT:PERIOD on the first craft you launch. This just makes the calculations simpler). Since we want them evenly spaced out, Satellite 2 should be 90° behind Satellite 1 in its orbit, with the same orbital period.