I just read intelgurls post on CLOs and PCLs..
Very simple and easy to understand..
I shall add a few techie babbles too..
The reason why LF radars are better suited to stealth detection are that LF waves dissapate much slower that HF waves..
In HF everything happens very fast, and hence is prone to quick loss of wave power..
And if LFs radar are boosted with more transmitting power, they're longevity increases in more..
As for intelgurl's note on LF interference due to similr freq. noise sources.. I am confused..
IMO most environmental/industrial/cosmic sources of noise are in the HF/VHF/UHF/EHF range..
THe only problems with LF radars that I can see are v high power requirements and large antennae sizes..
THe min. size and antenna can be to faithfully receive a particular frequency is 1/4th the size of the incoming wavelength...
My solution to stealth is somewhat raw as of now..
Have airborne radar UAVs which patrol the region of supected penetration while actively broadcasting omni directional pulses so as to form a complete
envelope in that region..
Just populate the region with so many drones that there are multiple envelope overlaps throughout the sensitive region...
Couple this with well placed PCLs..
Then the stealth aircraft will have to know the patrol paths of these drones to break through the radar envelope...
AS for bringing the aircraft down, communicate with drones and ground based radars to determine last known position(s) and then correspondingly
extarpolate all possible flight path(s)..
Finally direct SAMs to fire spreads at those flight paths while continuously updating new detections from drones/ground stations..
All very elaborate and expensive..
also very optimistic..
Maybe one can refine the raw concept described above..
And intelgirl, are the UCAVs (X-45 and beyond) preprogrammed with AI controlled flight paths/missions or remote controlled from the ground??!
And does keeping such info classified if deemed necessary include misinformation campaigns?..