[R-390] R-390a Part Of First ELINT Satellite Recon System

[Jim M.]

Interesting bit of history, declassified in 1998 after 40-some years,

http://ncst-www.nrl.navy.mil/HomePage/GRAB/GRAB_Photos.html

Scroll down to "Receiving Hut" photo.   Two 390-A's

Jim N4BE