PRP 1 wareh 1954 Command ariefing, 1100, 28 Februsry 1954 detection ates tettattie:timieate nah inand SUBJECT: OY VEMORANDU FCR RECORD: hie este Members present: Gen Clarkson, Gen HeGinley, pr. Graves, Adm Bruton, Col Cowart, Lt col Harbour (in lieu of C™% 7.4) Capt Kaynerd, Lt Col Bonnot, and Lt Col House. In general, tae hodograph gave a forecast surface radex ne 1. jerereye in ths low levels ( zero to 15,000 reeset) at about 50 siles in 6 hours, genzrally orientated to the west south west in asprcrisatee ly a 30 dégree sector. In the high leveis, the radex gave a 6 hour pattern centered on approximately 65 desrees in a carrow cone approximately 20 degrees wide. 2. The 72-hour cloud trajectories indicated all leveis ia a narrow band generally 65 degrees true from ground zero except tha 10,000 foot level moving generally east through corth to west and a 60,000 foot level moving southwest and then west. RadSafe outlooks ware given es follows: a. Bikini atoll: Favorable. b. Eniwetok atoll: Ce. Ujelang atoll: ad. Native atolls in southeast cuadrant: Pan wy 3. Favorable. Very favorable. Very fevcratie. e€. Control DDE: It was reccommended toat the Csntroiui Tis be moved frum @ position 90 miles Vest or Ground Zero to a pcsition 230 degrees Trus, 90 ciles fro= Sround Zsro. Tne plot o> the Yass ans aT? . courses fran about E minus 24 hours to = ;lus 2 bours wes 22 cele. in general, from about 9 minus 5 to ebdout = minus 3 Sous tx0 ATPs and YAGs courses rug approximsetely 25 to 20 siles frss ts armed device and the £tr departs from a positica ca tae ¢-5e cl tse low eltitude radex at ebout E minus 1s occurs toa pos.tice approx Tae acvesests ‘mately 35 miles south of ground zero 6% Z pius 2. of the YAGS and ATF were presentec fcr whatever consid.re+ica was necessary in view of their close proxicity tO tie geT.c@ Boe the radex. a yr ATF and the YaGS: wer f.