[Symmetry]

I'm sure the OP has already read his Skolnik given his comment but for those following along that's usually the best place to start.

https://www.amazon.com/Radar-Handbook-Third-Merrill-Skolnik/...

[spitfire]

There's also Fundamentals of Astrodynamics https://www.amazon.com/Fundamentals-Astrodynamics-Second-Dov...

Which builds up from first principles a ballistic missile defence system. Always useful to have.