AS EER econ) Project 6.4 + Determination of Characteriatics of Airborne Flush Mounted Antennas and Photo Tubes for Yield Determination at Extended Ground~to-Air Ranges - A. J, Waters On a ITS Ts dwterzing the cofacttveness 2f Slush mounte2 alrlicne ancvennas ani phototubes at warious grounieto-air ranges in detecting character- istic low frequency electromag: tit raifation ani wiaible raiiation, respectivaly, To letertine the temporal ani anplitute characteristics of the low frequency electromagnetic radiation at warisus grount-to-atr ranges. To determine the temporal and inverisity sharasteristics of visitle radiation at warious ground-to-alr ranges. To determine the effects of ambient contitions upon the satisfactory Reasurement of the parameters specified in items 1 and 2 above. INSTRUMENTATION 2 fiducial antennas 1 scope camers 1 synchroniser 1 DuMont Scag. (4ual beam? Signal is received by snterns fed through an amplifier and then to the scope, The signal 4a then plotographad. Airectly to the recorder. Photohead output is let The sequence camera photographs the blast Adrectly for use in correlation 2f previous data, imately 10 miles, Distance was approz- BEST AVAILABLE Copy Pquipment was removed from plane an’ set up at Parry Island on