| ok Chronologically, the documentation was a little mixed up in this folder with pa ‘quite a lot from the September time period that I haven't yet gotten to which I will cover now. Here is a document entitled 'Concept of Operations" which covers the use of an RC-121D aircraft and several other types of aircraft in a practice airdrop/diagnostics mission to be done staged out of McClellan Air Force Base in California and done off the west coast of the U.S. on about 14 December 1961. The purpose is for a rehearsal of the air drop array and some of the details of the rehearsal are presented here but there is no indication that this is anything more than a, CONUS practice for the off-Hawaii airdrop proposal, 5 Sept. 61, J-15 Report: a . | Calculations and reports on the Vela Sierra and : underground Iniform problems in the area of radiation transport and tynamic problems are continuing. : The question of yield determination for y ion between jround tests is being addressed in detail and the relat problems of tations that have been done for measurements in tuff to the sentation of explosions in the Nevada sandy soil (desert alluvium) are being t for 10 kt. "Specifications for time of arrival and pressure measuremen yround shots’in Area 3 are being made. The evidence available indicates than in the she results are more sensitive ‘to equation of state perimeters »f tuff. The yield determination should thus have less accuracy than for in tuff." 1-17 and ‘J-19 are still solely involved in Rover activities. 5