5.2 These instruments should be located in the aircraft in a position similar to that in the F-81G, They will have suitable response times, food responses to a wide spectrum of gamma radiation energy, and suitable pressure and humidity characteristics, They will probably be comprised by the instruments presently furnished for sampling purposes, Approximate Radius of Operation of the Aircraft: The radius operation for sampling is dependent upon the wind velocity at the sampling altitude, the time of cloud penetration, and the test site geometry. The most probable radius of operation is 300 miles but under certain circumstances may attain 00 miles. Te 7.1 7.2 Aircraft Required to Support Sampling Missions: For continental shots the capability of the B-50D is adequate for a control aircraft, For the high yield shots in the Eniwetok Proving Ground area the control aircraft should have a capability of at least ten hours total flight time, eight of which mst be spent at 5,000 feet. The control aircraft should have space for the normal crew plus at least two spaces for control personnel, If this aircraft has a speed capability of approximately 0.8 mach it may be possible to perform some of the early reconnaissance operations with it instead of with one of the sampling aircraft. 7.3 Courier aircraft support similar to that now required for Nevada and Eniwetok Proving Grounds shots will be required, Special Equipment Needed in Support Aircraft: Inter-communication, VHF communications and homing eqiipment now required for control aircraft will be needed in the future. Sufficient space should be available for radiation monitoring instruments which will be carried during the control flight. o. Flights Desired Between Scheduled Tests: 91 Flight tests for the evaluation and calibration of special equipment may be required fromtime to time 218 APOHO SWEH-2-003h pst