7. PLigurss . APOaT=1. 8 flights ande radioactive sample collections to the sous bétwees 8 and 10 April. Is both cases the cobra mee fogmk tovbe widely dispersed throughout the areca, but aa ono would expect, ' the levels were qadta low (hundredths of an iir/Hr). The first Might, , reported its peak colicction 170 ailis southwest of HAiAIT at 0200 Zebra, 9 Aprid (plus 56 hours) at 14,000 feet. This point was directly along the path of tite 40,000 foot air particle trajectory. /. sacond peak wis reported — 106 ; Southeast of HaAY%IL twenty-six houre later at 19,000 feet. anothef® Lesa active sample wig procured off. the caust of Souther California on 12 wapril. Alreraft opsrating from GU:/4 mde no col.ections of KOON debris. 8 IN-FLIGHT EXOSURCS: ALL in-flight radiation ex.ocaures of the aircrafts crewe participating in the cloud trsexing effort vere whlk within Taek Force liaitationss 9. RaDEXe The KOOM air radex is attached as appendix IT, Because of the yield of KOON the classical radex procedure was used in this post-shot revisica. The technique considers the cloud to be essentially a point scurce in all dimensions other than in a vertical direstion. The radex proved to be 4 reasonably accurate for.vcast of the conditions subsequently observed in | the sampling and tracicing operstions. 10. ¢ IONS & The iir Rad Safe operations for KOON were quits successful. In particular, the cloud tracking operations early estcblished the fast that there were no elementa of the KOON cloud which necessitated the emacuation of nearby atolls, o. <asausing that the forecast winds and trajectories sre reliable, c. No hasardous falicut acpeared likely in the BUsM, PON..PE, oF reasonably accurate forecasts can be mde of the areas which will be sub= ject to fallout. HATAIT areas as a result of SOON. 11. RECOM END).TIONS: None. appendices: IL WILSON ./€ Plot IZ KOON Air Radex Me28