find out about right away and rom - i a a rather unsatisfactory way of getting information back here; second, to watch over the samples themselves to see for one thing that there are no bungles of any kind and secondly to sort them out since we, for our shots, give some samples to other cooperating labs, such as UCRL (and vice versa when they shoot). He is to make the decisions as to which samples this is to be done on and to see that they are properly sorted out when they get back here to Albuquerque. About two or three weeks before the shot we send out two men. One of them is to visit with the AF team on Eniwetok, the men who remove the samples, to see to the details of packing, sorting, etc. of the samples so that nothing goes wrong at the last minute. He also makes arrangements so that we pick up from the controller of the aircraft and also from the officer who receives from the pilot the flight records (the data on just what altitude and position these planes flew in) which we like to have before we decide what papers to combine in our samples back here. The second man, whom we call the resident representative, is more likely to be on Parry Island, and he has one specific job and that is to place our tracers around the bomb. Around some of these bombs, we put fairly substantial quantities of alpha active tracers which we measure small amounts of in the samples and get a measurement of the fraction of the bomb collected. These have to be placed in the right position and at the right time so the resident representative has the responsibility of taking custody of these things from the time they arrive at Eniwetok and seeing that they are put on properly and that the records are kept. He also is the man who stays around and keeps up, we hope, from day to day on what is happening in the plans at the main office. As far as yields are concerned, we usually have some data after three days and then three weeks later, figures which are more accurate. As far as people in the FA are concerned, there can be the two that I mentioned, for 11.1, plus the monitors that come out there. With the schedule as it is, there are likely to be two or three monitors on hand at any given time. There will be a maximum, we think, of five men. Project 11.2 - In general, we would like to get on these bombs 10° or 10°° fissions equivalent per airplane. This is really a description of the AF sampling unit itself. I'll describe later what our function is in it. The first object is, of course, to get the size of the sample required, the second is get for other information a fairly good distribution of samples from various parts of the cloud at different times to see how the isotopic ratios vary; whether there is fractionstion, and other information of that kind about what the cloud did or what the radioactive materials in the cloud did. There are to be available for this operation some six B-57B's and 10 F-84G's, the latter including provision for two spares specified by TG 7.4. Now on the large shots which are defined as better than a few hundred kt, we plan that there will be four B-47B's and two F-84's plus one B-57B control aircraft. The schedule of penetrations I won't go into in any detail. In general, these are not very early samples - the F-84's go in usually about Ht2 to H+3 hours and the B-57B's go in as late as H+ hours. Cop; Langpl0e The F-84's get up to from 30,000 to 42,000' —— a