PRIVACY ACT MATERIAL REMOVED Gr B/Ltr fr Hq, WREP, 4PO 187, c/o PM, San Francisco, Calif., Subj: Weather Balloons, dtd 13 Mar 54 d, The highest possible heights are desired by weather forecasters and radiological safety people. It has been learned that serious fall-out. may occur from heights above those attained by rawinsonde observations at present. Definite information at higher levels than presently obtainable to be made affecting the final order for firing each shot. Peculiar winds at these higher levels may indicate serious fall- out over such populated locations as Eniwetok or Kwajalein which would not be suspected without this information. e, Bettor results may not be obtained with the new balloons, but if they are obtained, and there are good indications that they could be, the information received may be of surficient importance to warrant the expense, ist Ind HEADQUARTERS, TEST SERVICES UNIT, PROVISIONAL, APO 187, c/o Postmaster, San Francisco, California TO: Commandcr, Task Group 7.4, Provisional, APO 187, c/o Postmaster, San Francisco, California In view of the lack of certain required information at this level it is impractical to make a definite recommendation regarding the advise- ability of securing diffcrent type balloons for this operation, Although we are not obtaining the rawinsonde hoights desired by JTF-7, the factors mentioned in paragraph 9 of basic correspondence, plus any others which may have a bearing on the problem, should be weighed agninst cach other to arrive at a decision, It is suggested that coordination between your Headquarters and JTFr=7 may be adviscable, Request this Headquarters be notified of the decision reached, FOR THE COU.NDER: . r-J ~, to crim “~N -—> IH 563