I am coming across this term "instrumentation radar" without exactly defining it but with adjectives like high performance, mono pulse etc. But what exactly is an instrumentation radar?
closed as off-topic by CuriousOne, user36790, sammy gerbil, knzhou, Diracology Jul 19 '16 at 22:18
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An instrument is a gadget for measuring something. So an instrumentation radar is a radar for measuring something. Perhaps it is not the most helpful name.
Here is a document from 1998 that maps out the future of instrumentation radar for use in places like military missile ranges.
Instrumentation radar has played a very significant role in testing and training for more than 50 years. Along with optics, it has been a major supplier of time-space-position-information (TSPI). With the advent of the Global Positioning System (GPS), the need for instrumentation radar for TSPI has been called into question. Is radar still needed? Or can it be replaced by GPS?
It is also needed for a variety of specialized measurements, including radar cross section (i.e., stealthiness), characterization of debris, and assessment of damage at intercept.