_ Wig la050 Project 6.4 - Determination of Characteristics of Airborne Flush Mounte? Antennas and Photo Tubcs for Yield Determination at Extended Ground-to-Air Ranges ~ A. J. Waters ORTooTIVves To determine the effectiveness of flush mounted airborne antennas and phototubes at various ground-to-air ranges in detecting characteristic low frequency electromagnetic radiation and visible radiation, respectively. To determine the temporal an? amplitude characteristics of the low frequency electromagnetic radiation at various ground-to-air ranges. Ta determine the temporal ani intensity characteristics of visible raiiation at various ground-to-air ranges. To determine the effects of ambient conditions upon the satisfactory. moasurement of the parameters specified in items 1 and 2 above. INSTRUMTNTATION 2 2 1 2 fiducial antennes whip antenna synchronizer photoheais 2 scope camcras l sequence camera 1 recorder 2 DuMont Scopes (1 a dual beam, 1 a single beam) TRAN yTaTe Signal is receivel by antenna fed through an amplifier and then to the scope. The signal is then photcsraphed. directly to the recorder. Photohead output is let The sequence camera photorraphs the blast directly for use in correlation of previous data. Distinee was approx= imately 62 miles. BUSTS Signal was received and recorded on both antennas. No photohead data was obtained because there was a restrictive filter (1%) placed over the photohead and there also was a rain storm between the burst and the Lowe + instrument, oy© \ & ro oy . ae ‘ ak RC uli Ni y