Hi Gorshkov, I'll try to answer the best I can, feel free to ping us if something is unclear:
1. Cross-posting from here, hope that's ok:
http://www.matrixgames.com/forums/tm...width�
The radar model takes a great number of factors into account, like frequencies, horizontal and vertical beamwidth, System Noise Level, Processing Gain/Loss, Peak Power, Pulse Width, Blind Time (pulse compression is your friend, woh-hoo!), PRF, min & max range, min & max altitude, scan interval, range/height/angle resolution, various capabilities such as air/surface/ground/periscope & range/altitude/speed/heading (RASH) info, OTH-B/OTH-SW, pulse-only & early/later doppler with limited/full LDSD, MTI, NCTR, Phased Array continuous target tracking, CW and CWI capability.
Stealth is simulated by having lower radar cross section (in dBsm) for stealth units. The actual signature also varies with aspect. The in-game signatures are listed in the database viewer within the simulator.
2. Right now cruise missiles don't navigate via waypoint but they stick to their RL flight profile, e.g. low-altitude terrain following, glide, etc. L-JDAM can hit mobile targets, where as JDAM can not, etc.
3. Mostly "yes", some "not yet", and a few "no". The AARGM is there and it will home in on targets using its microwave radar if the radar goes silent.
4. I'll leave this one for Dimitris.