CHAPTER @ EXPERIMENT DESIGN 2.1 SHOT PARTICIPATION The craters resulting from the following three shots were surveyed as a part of this project. TABLE 2.1 - Shot Lecation + Snot Shot Location ee wn oe On the reef in the northwest ee , section of Bikini Atoll. On ax island in the southern section of Bikini Atoll. | | a - In tre lagoon in the northeast i section of Bikini Atoll. he a The reasons for limiting participation to these three snots have been described in section 1.3. It should be noted that for the purposes of crater measurements it is necessar;} to determine the surface or bottom contours prior to tne explosicn and again subsequent to the explosion. While in e scientific sense it would be desirable to mea- sure the crater shortly after zero time so as to avoid modification of the crater by tne action of water waves and currents, no feasible way of accomplishing such a prompt measurement has been conceived. Hence the crater survey operations in one sense involved no participation during the explosion and tne interval immediately following it. Actual- ly, the time rlanned for the re-entry o: tne survey group after each shot was bounded by the time judgec te te required for the radiation level to deca, to a value such tnat 4 tc & hr exposure would not result in a total dose amounting to an important fraction of the allowable total dose for the wnole operation, namely %9C0 mr.