wm Project 1.3 4 Shock Photography - J. Petes OBJECTIVES To measure free air peak shock overpressure as a function of distance in a horizontal direction at burst height and vertically above the burst. To determine the blast yield. To study the effect of the nonhomogeneous atmosphere on shock transmission, To study the effect of the surface and heating of the air near the surface on shock transmission. INSTRUMENTATION ¥ The instrumentation for this shot was smoke rocket photography. The rockets, both Deacon and 5,0", were fired from two stations. One was on the south end of Bokobyaadaa (Able) and the other was on the reef 12,000' SW of Bokobyaadaa (Able). The cameras were located on Aomoen (George). RESULTS The rocket instrumentation and the cameras functioned properly but as a result of the bombing error the films obtained for the project are probably of no value, All other films obtained by FG&G that might be of use to the project were inspected. value. Four films were found that may be of limited Through two of these films a limited amount of pressure distance data at burst height may be obtained. The other two films may be of some value for a study of surface effects. » COPED NL Re ve —_ \