With Army security relaxed, the M.I.T. Radiation Laboratory, U.S. headquarters for radar research, announced more radar news:
¶ Most striking was a radar picture of Manhattan taken through heavy clouds at a low altitude by the latest microwave set (see cut). Plainly showing, in fairly sharp outline, are piers, Central Park, individual buildings.
¶ One microwave set uses radio waves so tiny that they put the finger on raindrops and dampish clouds. A system of such sets could give a precise, continuous map of the weather over the whole U.S., showing airplanes how to...