wee OTERO The gamma detector ,"Baintileg," covers the range ef ‘3.01 to 1000 wr/hr in a single senle. . it iu a periable ‘ instrument, weighing 17 pounds 11 ounces, end reqiring nc exterml source of powere Fie. at rt ecieeditetites et “a Vira “sg “OD The recording wit is also portable and selfepowersie An audic signal, modulated by the output of the sointilog, is rveeordet on one chamel of a two channel tape recorders The medulation is between 600 and 3,500 oysles end is propertionl ve the legeritim of the radiation intensitye On the scoond ohamel, the operator makes a veoal record of position, sltitude, etee By weens of a playteck attachment, the audio aicmal ean be converted te « velterce chich astwates & pen type recorder, eonverting the radiation intersities te a graphie recard ‘ON ND (Figure Yale preliminary survey at the Wevada Proving Grounds yielded caltiratton faoters of , and 10 for converting readings e-sour at 200' and 500' altitudes respectively te intensity 3 feet ahere the @owde These fasters were cheaked in flights over the fslands of Bngebi, Runit ani Kwajaleine Ground level radiation intensities, ebtained by direct messurement and by acuputation fren aerial readings, are iivted in Table 1.1. MYHOLM oneo 1 OERT Ce REEAE MEERi ng ERE cet: or ry seta es se TARR 101 sitade Engobt, Ranit 3e 08 2ek Oe75 200? 066 207 Oda 590! O06 303 - ok= reer rr Kwajolein Kegon island