me . i into a shielded position, the third of which drops at approximately 60 sec into a shielded positior. The differencee between these three measurements will give information or the early dose as compared to the late and also on the total fall-out in close-in regions. The film dreppineg meckenienms are not yct procured because different types of mechunis=as ars being tried on the Snupver operation. Similarly, the amoun* of shieldi:g required has not yet becn set and is again aweiting informetion to be gseined et Snapper. , 5.2 Gamma Intensity aa a Function of Time - LASL-J-13 (J. Malik) Function of time measurements will be made at four positions, as followa: .t Cochiti, San Il de Fonso, Bogombogo, and Puchi, measure-_ ments from 1 msec to 30 sec covering 6 decades of signal. At Ruchi, meesursments from approximately & decades lenned thet the time measurements with 5 ..8ec resoiution up to nugec to 20 ysec covering measurement will alse obtain sec, covering asain , and aecades* The installation at Ruchi will require a emall blockhouse, the requirements for wlich have been turned in to Campbell. The installations on the other ‘alunds will use <he same type station es used at Buster, i.e., a self-conteined unit. 5.3 Fall-out Gamma Intensity - LASL-J-13 (J. Melik) For fall-out measurements, self-recording radiation monitors are proposed for the islinds of Rigili, Perry, Biijiri, Engebi, and Runit, with telemetering monitors for Bogon and =ngebi. These cre to be ionization chumbers driving ultimately an Esteriine--sngus recorder or equivalent. Similar monitors are proposed for approximately ten other atolls in the neighborhood. It ig proposed thet theee fall-out measuring inetrunents be tried out on Snapper. 5.4 Fall-out eat Intermediate Distances, Particle Collection end anelysis No details of this program are available to this office at present. Conte La N4,a/b ore