| ne v Project 6.1» Accurate Location of Electromagnetic Pulse Source ~ Dr, E. A. Lewis OBJECTIVE To utilize the electromagnetic signal originating from nuclear weapon detonations to determine gound zero of detonation. Secondarily to obtain the yield data that is available in the bomb pulse. PROCEDURE Location of Ground Zero is made by use of an inverse Loran principle. The exact time the bomb pulse is received at various stations is recorded. The exact time difference in receipt of the electromagnetic pulse between two stations will be used to determine a hyperbolic curve which runs through ground zero. The point of inter- section of two or more curves determines ground zero. There are two systems, One of the systems is known as the long base line system and the other, the short base line system. system has two sets of stations, Fach The long base line has one set of stations located in the Hawaiian Islands (Midway, Palmyra and Maui) with synchronizing antenna station at Haiku, Maui, and the other set of stations in the States (Harlingen, Texas; Blytheville, Arkansas; Kinross Michigan and Rome New York) with synchronizing antenna station at Cape Fear, North Carolina, The short base lines have one set of stations located in the Hawaiian area (Kona, Hawaii; Papa, Hawaii; and Red Hill, Maui) the other set in California (Pittsburg, Woodland, and Maryville). RESULTS Short base line. Hawaiian Area - Kona net all stations received and recorded : 0 PIED/DOE | LANL Re - 63 <a \\