OK, that makes sense, kind of, that the turbulence caused by a plane might be detected, what with temperature differences.
But I am assuming that radar cannot detect clear air turbulence that has no machinery associated with it.
This is gonna play hell with my antigravity experiments. Dang it.
One of the early high powered radar systems detected simple air currents, like heavy breezes and such.
The main problem at the time wasn't power output, but filtering the data.
Anything that would disturb a smple radio signal can be detected by radar.
It's the processing of the return signal and catching whether or not it's important that is difficult.
Something new is 'bistatic radar.'
Basically emitter and receiver are seperated, mounted on vehicles miles apart.
However, there's a glut of info generated by this, air currents, birds in flight and such.
Computers currently available cannot filter the info yet.
But I suspsect that it will be useable soon.