(BLACKFOOT) Project 16.3 = Nlectramagnetic Measurements ~ 8. Partridge Project 14.3 measures the time interval between the primary and seoondary reactions in multi-stage devices by direct cscilioscopie recording of the electromagnetic radiation in the radio frequency range. In addit- ion, methods of obtaining other diagnostic information from thie signal are investigated. . xv . oD Since theBurro) and ae (FLATHEAD) were fired simltan- eously, the aqqeitivity of the tine interyatyerul pment was set to record the Nw (FLATHEAD). Since BReLacxrcce was much closer, its shenMY well off scale. It would have been dasireble to record the Wow in order to allow sgpurete prediction of the field strength \ we to be expectegyfrom na Dnfortunstely, this would have jeopardised the - The ime interval data, alpha recording system was set wp for the yw <4) ae the signal does not appear to be truly exponential in shape.” Severe redio interference required reducing the gain drastically during the last 30 seconds. The rise time does correspond roughly to the predicted alpha. This eige pal will require more careful study later, BEST AVAILABLE COPY 73 4