radar and gliders !

Don Johnstone wrote:
I think you will find that and ordinary primary radar
can give an approximate height when processed. This
'Height' is not accurate enough to provide seperation
for controllers but is available. The slant range to
the target is used as one measurement and the other
is the point on the globe over which the target is.

How do they determine where this point is? The radar I'm familiar with
only gives the slant range.
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Eric Greenwell - Washington State, USA

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