This document consists of A Copy No, AG of 20 5 pages Series A ATOMIC ENERGY COMMISSION PROPOSED HIGH ALTITUDE TEST Report to the General Manager by the Director of Military Application 1. In a letter to me dated October 7, 1955* Professor E. ©. Lawrence expressed concern over the possibility that the USSR may be capable of detonating nuclear devices at very great altitudes, circumventing thereby our attempts to maintain long range surveillance of their nuclear testing activities. In support of his concern Professor Lawrence pointed out that on two USSR tests we obtained only an acoustic signal. Professor Lawrence. requested that AFOAT-1 be asked to investigate this possibility, paying particular attention to a review of the acoustic signal data now in its possession. Further, Dr. Lawrence suggested that the USAEC undertake a direct experimental investigation of this problem by detonating one or more high yield weapons at very high altitudes. 2. In furtherance of Professor Lawrence's suggestion we wrote to AFOAT-1 on November 3, 1955* advising that organization of Professor Lawrence's letter and requesting it to investigate the possibility that the USSR could conduct thermonuclear weapons tests at altitudes which would diminish the effectiveness of our long range detection methods and further requesting that we be furnished the AFOAT-1 estimate of suitable combinations of yield * On file inDivision of Military Application This document contains restricted data as defined in the Atomic Energy Act of 1954, Its transmittal or the disclosure of its contents in any manner to an unauthorized person is prohibited. na OP » rg fo fim Pp Oh wh oT

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