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Primary radar as used by ATC is extremely limited. It is not designed to identify targets at all; nor does it have particularly good vertical resolution. It can
by aaronmdjones 2y ago
Primary radar as used by ATC is extremely limited. It is not designed to identify targets at all; nor does it have particularly good vertical resolution. It can tell you where in 2D space a plane is, but without secondary radar and a cooperating transponder, it can't tell you what plane it is, and its uncertainty with respect to altitude can be several thousand feet.