aa» alld=) Project 2,61 = Rocket Determinatioh of the Activity Distribution within the Stabilized Cloud - RF, Soule OBJECTIVES % Four rockets were fired at magia(2) in order to develop the capability of measuring and to explorethe spatial distribution of gamma activity within the cloud and stem produced by the detonation of nuclear weapons of megaton yield, INSTRUMENTATION A six inch diameter ground launched-_rocket capable of attaining - 180,000 feet altitude, bearing a radiation detector and telemetering equipment was used to obtain information on the radiation field in the cloud, The first of the four rockets was fired at H + 7 minutes with the others following at ten second intervals, Radiation intensity information (in the form of F, M, pulses) was telemetered to two receiving stations where the information was recorded on magnetic tape, RESULTS All four rockets fired and good signal strength was received on three of the four channels, One transmitter failed shortly (about 5 seconds) after take-off and one transmitter was considerably off frequency, Accelerometers were used on two of the rockets, Their data can not be reduced in the forward area, since a discriminator will be required to separate the radiation field intensity data from the acceleration data, Data on the one channel that is readable in the forward area indicate radiation fields considerably below the average encountered from the (Cherokee). However, they may correspond to those obtained at (Cherokee) for a similar trajectory, ~ 5 -lu- d \

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