Vercingetorix
Tarq57
I note that you refer to Clark as having Seles radar.
Hi, not me.
I didn't even know what "Seles radar" was until I Googled it..it seems the name you might have meant was Selex Radar.
My deduction of the ability of the system to give an altitude readout was based on the OP's comment saying that the primary radar gave the altitude as 4500FT. From that I deduced that the primary radar was able to triangulate and calculate altitude, in much the same way as the Brazilian system, which was widely publicized- and especially on this forum- following the GOL/Legacy midair.
It makes sense to me that an area of such strategic importance to the US military would be likely to have this capability.
Whether it also has the ability to more accurately measure azimuth using a phased array, or localized microwave directional (3D) type of tech, I don't know, but it seems quite possible. Likely, even.
(Semi-educated guesswork, really.)