MBNpacts) Project 6.1 - Accurate Location of an Electromagnetic Pulse Source ~ EA. Lewis OBJECTIVE To utilize the electromagnetic signal originating from nuclear weapon detonations to determine ground 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 verious 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 intersection of two or more curves determines ground zero. There ere two systems. One of the systems is known as the long base line syster and the other the short base line system. sets of stations, Fach system ‘has two The long base line has one set of stations located in the Hawaiian Islands (Midwey, Palmyra and Mavi) with synchronizing antenna stetion at Eaiku, Maui, end the other set of stations in the States (Harlington, 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 erea (Kona, Hawaiis Papa, Hawaii; and Red Hill, Maui) the other set in California (Pittsburg, Woodland, and Maryville). RESULTS All stations in both the long and short base lines successfully received and recorded the wave forr of the electromagnetic pulse emanating from the bomb detonation. Line of position and fix errors will be reported in the Project 6,1 report, a. 2 ¥

Select target paragraph3