. = v7 Project 6.1 - Accurate Loestion of Eleetromagnetic Pulse Source - F.4, Lewis To utilise the electromagnetic signal originating from suclear weapon Getonsticns to determine ground sere of detonation. Seeondarily, to obtain 8 the yield data thet is available in the bemb pulse, PROGEEARE Location of greund sero wee andes by use of inverse Loren principle. The exact time the bomb pulse is rescived at various stations vas reserded: The amet tine differeses in receipt of the clestromegnetic pulse between two stations was used to determine a byperbalie curve vieb runs through ground sero. The poist eof intersestion of tuo or nore curves deteruines ground rere. There vers tvo systems. One of the systems was know as the long base line system and the other, the short base line system. Each system had tuo sete of stations. The long bese lize bed ome set of stations losated is the Heveiien Islends (itidvay, Palmyra and Mei) vith synchronising axtenne station at Haiku, Meni, and the other eet of stations in the states (Serlinges, Teme; Wytheville, Arkansas; Kinross, Michigan anf Rene, Bev York) with synchronising emtemna station at Cape Pear, Borth Cerclina. The short base lince bed ene set of stations located in the Hewsiien ares (Kona, Mawail; Pape, Newail; end Red Mil), Maui) the other set in California (Patteturg, Weedlead, end Maryville). oanDose BEST AVAILABLE COPY Hewail - All stations in the Kone net successfully received and pecerded the vave fors of the electromagnetic pulee emansting frop the by . cor? . ac os -~ We Si K .