UNIVERSITY OF CALIFORNIA LOS ALAMOS SCIENTIFIC LABORATORY (CoNTRACT W-7405-ENG-36) P.O. Box 1663 LOS ALAMOS, NEW MEXICO IN REPLY REFER TO: ai H~6-77 Commanding Officer U.S. Naval Sadiological Defense Laboratory San Francisco 24, California Attention: O827°5 Jr. C. F. Ksanda arena Dear Mr. Fsanda: is considered desirable that operational forecasting for 2aDW not bee tinited to a sinzle model and rethod. At the sugceestiog proven in for operational feasibilisty at. the start of :“eDWING. TSAPCT, we depended considerably on telephone communication an Model 701 calculations, Experience indicates that at miwetok colmunication to the mainland cannot be relied unon at critica of Pr. During Ish: telephone Teletype communication should be adequate for the use cf one forecasting based in the Z,I., but we expect to rely mainly on computers in the forward area, Lacked up by ‘and-calculation m F 2 dq As you are doubtless aware, the main requirements for an method are: ea 2G , Zt showld produce at least one isodose contour with#h (1) a of receipt of a wind forecast. { 34 (2) be yo 4? | a6 (3) . . Jopesationa an hour BRUNO FRE . =rrers inherent in the method shculd be less than t! from other sources (e.g. wind and yield forecesting tet nie arisin rrors). ' It is very desirable that the method should not recufire more tian one zen in the forward area, The plens for fallout prediction at 2aD.T'S are stili srl have a suitable methed, and would like to participate, I would metter further. RG 181 AGENCY/NBQMCTEUnity to discuss the Very sincerely yours, “yo. er Location___BRUNO Access No. /8t G yor t Thrte Tey 95s Folder haistricuticn: Ue boty =) on . ste* ' 7 :3 fe ! “Dea a Ontin aa h aA Ne he cy : s TN. Ron ait od +7 l.o@ White, Leader pFEST COPW AVAILABLE nediological Fhysics Croup Health Division ™" 2/