<p>Pacific Missile Test Center NP-3D (BuNo 150521) at Pt Mugu, October 1988.  This was the second aircraft modified with the "Billboard" for the Extended Area Test System (EATS) radar in 1979.  Photographed by Michael Grove.
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/sdasmarchives/4832434876/">PMTC BILLBOARD WEB</a>