=SFCRET aeeeEastagesa —_ ———a a tip of Charlie. On Yuma and el = are maxis up to the tower, These are tower shots and on Blackfoot we have plenty of room, so we plan to go out several thousand yards on these and Yvonne is a good island. However, in the case of Osage, where it is apparently being planned to be a low air drop over the central part of the lagoon, because of the lack of land out there we would like to suggest that, as far as we are concerned, it should be shot over either Yvonne, or in the Sally group of islands, Sally, Tilda, or Ursula. Q: Have you taken into consideration that you have other installations on that group of islands? A: Well the only solution I have is that we will have to have more discussion of closer stations for Osage or use more floating stations. Another problem that is important for us is the symmetry of the weapon. We have to know if we need single lines, or two lines or three lines, and in some cases we may have more plans for more wires. In the tower shots we also need to know if there is any interference in the path of the line of sight of instruments at our stations. Our construction requirements are fairly good except for Osage. plan to have seven people in the FA. Any questions? We Q: Will you please come into the J-3 office to discuss the sample return require- A: Yes, I'll do that. ments? Project 2.6.1 ~ Rocket Sampling of Fallout at Early - R. Soule - BuShips - NRDL Times and High Altitude The first objective of this project is to proof test a system using rocket- borne detection units and telemetering transmitters to explore the spatial distribution of radioactivity in the stem and cloud resulting from a nuclear detonation. The second objective is to measure gamma intensity along several continuously known trajectories passing through the cloud and stem at 10 to 30 minutes after detonation. It is planned to participate in Cherokee, Zuni and Navajo. A 6" diameter rocket capable of attaining 170,000' altitude, bearing a radiation detector and telemetering equipment, will be used to achieve the specific objectives. A launching revetment will be constructed on an island at a distance of 10 to 18 miles from the shot point (this indicates the island of Bikini). A receiving and tracking station will be set up on a ship to be stationed at about 40 miles from the shot point on a line at right angles to the flight path of the rockets. It's planned that up to 14 rockets could be fired in two salvos of seven simltaneous firings for each of these three shots. The complete rocket, including the telemetering head,and the radiation detection device, is to be supplied by a contractor, This contractor will also fire the rocket in the field, receive the information, reduce the data, and supply it to us. On the other hand NRDL, in consultation with other interested persons, will indicate the volume that the rocket should traverse,