between tests. It is estimated that ten three-hour missions will be required during the year, 10, Other Technical Data: 10,1 The airspeed of the sampling aircraft should be approximately 0,8 mach, Should they become available, it may be desirable to make special use of aircraft with altitude, range, or endurance capability superior to the standard sampling aircraft. 10,20 The sampling aircraft should be provided with a filtered pressurization system so that the aircrews may fly pressurized and should be equipped with lead shielding in the seats, Aircrew personnel should wear the special shielded flight clothing which has been developed for the present sampling missims. 10.3 It is highly desirable, in addition, that the aircraft carry at least two flight personnal, By freeing the pilot to attend to his normal flying operations, a second person should contribute greatly to the effectiveness of the mission. 10.4 There is evidence that an airduct configuration such as that of the F-8)G approximately doubles the radiation intensity in the cockpit acquired during cloud penetration, In order to reduce radiation exposure received during return to base, an effort should be made to choose an aircraft for sampling which has engines and air-ducts well removed from the crew compartments, General, 1121 While drone aircraft support for sampling purposes is not directly required, we wish to restate our desire to take advantage of such type aircraft if required for other agencies provided it is feasible operationally and equipment-wise to do so,l7 A sustained, major consideration for carrying out sampling programs involved changing organizations and responsible personnel who had no experience with this type of work. In February 1956, Dr. Harold Plank composed a "how to do it" document for submission to the Task Group 7.h. 219 APWL/HC SWEH-2-003)