Area 51 Radar Cross Section (RCS) Range

Radar cross section (RCS) is a measure of how detectable an object is with a radar. A larger RCS indicates that an object is more easily detected.

Measurement of a target's RCS is performed at a radar reflectivity range or scattering range. The first type of range is an outdoor range where the target is positioned on a specially shaped low RCS pylon some distance down-range from the transmitters. Such a range eliminates the need for placing radar absorbers behind the target, however multi-path interactions with the ground must be mitigated.
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kjfitz picture
@ 2010-09-01 17:56:25
A-12 on the Area 51 RCS Pylon, looking east over the lakebed:
http://dlr.thexhunters.com/area51/groom_oxcart_06.jpg