_ —_ gee ming ~ Ft Project 13.1 - Measurement of Alpha and Time Interval - H. Grier J. Malik r ki _. Instrumentation for measurement of alpha eatin £ . and of time interval between primary and secondary was made by EG&G (Knappenberger) at Namu station 1319 located 400 ft from predicted ground zero, The miss of 20,000 ft made the slant range to the detectors too great to even trigger the system, data were obtained. No