ANALYSIS AND REDUCTION OF DATA RECORDED UNDER PROJECT COWBOY
TEXAS INSTRUMENTS INC DALLAS
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The analyses conducted under Project Cowboy was performed on eight chemical detonations. These shots consisted of 200-, 500-, and 1000-pound decoupled shots in a 30-ft. spherical cavity. An additional decoupled 1000- pound shot was detonated in a 12-ft. spherical cavity. Tamped shots had yields of 200, 500, and two 1000 pounds. This study indicates that the partition of energy in a decoupled shot is different from that radiating from a tamped shot. For the various decoupled shots of different sizes this partitioning change indicated that the degree and type of decoupling varied with the size of the charge and the cavity in which it was fired. Therefore, the values of the amplitude density ratios of tamped to decoupled shots are dependent on frequency, the modes contained in the section of the response which is analyzed, and on the size and desposition of the decoupled shot. In addition, for some of the body wave modes recorded from a tamped and decoupled shot pair at a single station, the decoupled signal can be approximated by linear filtering of the tamped shot source function.