> (1 CHAWK) Project 6.4 - Determination of Characteristics of Airborne Flush Mounted Antennas and Photo Tubes for Yicld Determination at Extended Ground-to-Air Ranges - A.J. Waters OBJECTIVES To deterrine the effectiveness of flush mounted airborne antennas and phototubes at various ground-to-air ranges in detecting characteristic low frecuency electromagnetic radiation and visitle radiation, respectively. To determine the temporal and emplitude characteristics of the low frequency electromagnetic rediation at various ground-to-air ranges. To determine the terporal and intensity characteristics of visible radiation at vcrious ground-to-air ranges. To determine the effects of ambient conditions upon the séetisfactory measurement of the perameters srecified in the first two items. INSTRUVENT/ TION 2 fiduciel antennas 2 scope cameras 1 synchronizer 1 sequence camera 2 photcheads 1 recorder 2 DuMont Scopes (1 2 dual beam, 1 a single beam) TECHNICUR Signal is received by antenna fed through an amplifier and then to the scope. The signal is then photoeraphed. directly to the recorder, Photoheed output is led The secuence camera photographs the blast directly for use in correlation of previous deta. Distance was approximately 62 miles. RESULTS Signals were received on both antennas. However, because of improper score settings, excessive hesh wes photorraphed along with signel on one a SAT wR ke vadl gC ; - 53 -_ > 2