A REPORT OF ATO~C =Gy Cm”dSSI@N PARTICXPATIC}I IN THE PLANNING STAGE OF ~ C-ICATIONS SYSTE?S FOR OPERATION “SANDSTONE!’ On 23 October 1947 M. Louis A. HoPkins, Jr., of the Sandia Base Branch, Los Qamos Scientific Laboratow was appointed to act in a liaison capacity in communicationmatters between J-Ditision of the Laboratory and the Armed Forces during the planning and operational phases of Operation Wandstone.lt The duties of the Comnun~cations Section, LOS Qmos J-1.l(LAJ-11),were considered to be: (1) Coordinatethe communicationsrequirementsof J-Division with the CommunicationsSection, Joint Task Force NSwitchmanll (later, Joint Task Force Seven); (2) Coordinatethe AEC communicationfacilitiesin the United States with the Azmed Forces; (3) Advise the Scientific Director in matters relating to operations and communications; (4) Keep the Scientific Director informed as to the status and operations of the communication system provided by the task force. on7 January 1948 Lieutenant Colonel John P. 5croggs, Signal Corps, USA, of the jsth Engineer Battalion was chosen to aid Hr. Hopkins with this assignment. Lt Col Scroggst primary assignment was the planning and supervisionof Atomic Energy Commissionmessage handling procedures and facilities. During the planning stages of communications (which the remainder of report covers in detail) it was detenuined that the following $4 Section XI .