Hi all,
the ICAO definition of RADAR is:
A radio detection device which provides information on range, azimuth and/or elevation of objects.
and the ICAO definition of elevation is:
The vertical distance of a point or a level, on or affixed to the surface of the earth, measured from mean sea level.
I find from this definitions that radar provides information only of the objects which are on the geround or affixed to the ground!
how can it be explained?