OPERATION GREENHOUSE - DATE: TIME: PPG time 9 May 1951 0930 George GMT Sponsor: LASL SITE: PPG - Eniwetok - Ruby 11° 162° 8 May 1951 2130 «37' 18' Site elevation: HEIGHT OF BURST: #37" 53" N E Sea level. 200 ft TYPE OF BURST AND PLACEMENT: Tower burst over coral soil CLOUD TOP HEIGHT: CLOUD BOTTOM HEIGHT: 56,000 ft MSL 41,000 ft MSL REMARKS: The survey readings on the shot island were obtained at H+2h hours and extrapolated to H+l hour using the t-}°* decay approximation. Since the winds were from the west~southwest throughout their entire structure, no radiation reading higher than twice background was observed on islands beyond 2,000 yards from ground zero. 39