Location Detector Type & Number YAG 39 END OF SIO-P BOOM NYO-M IONIZATION RATE (R/HR) Station BAG REMOVED FROM DETECTOR IMIT OF CALIBRATION 20 30 40 TIME SINCE DETONATION 50 60 (HR) Figure B.9 Surface-monitoring-device record, YAG 39, Shot Flathead. 300 70 80