Order number page 11 940406-171827-13 -001-001 set 5 with L1OFFICIAEUSE ONLY Test results from automatic yield indicators 110. PRIMARY TITLE (M) Cowan, M.; Munro, D.N.; Sander, H.H. | 70. PERSONAL AUTHOR (M) Sandia Corp., Albuquerque, NM (USA) ! 710. CORPORATE SOURCE 750. PUBL ..ANNOUNCEMENT ERA~-12:005062; EDB-87:005160 601000 371. PUB. DATE (YYMMDD) 34. CLASSIF. LEVEL TEXT unclassified Automatic yield indicators which operate on the 950. ABSTRACT ‘ negative-phase duration principle were developed. Yield estimates were obtained during Hardtack Phase I for five detonations at distances ranging from 11 to 25 miles. é The greatest error in yield was obtained at 22.5 miles where the ratio of indicated yield to actual yield was about 2.5. For a lapse condition, it is estimated that automatic yield indicators will nearly always indicate within a factor of 2 or 3 of the actual yield within the range to 0.1 psi peak overpressure (about 30 miles for 1 mt). Under strong low-level temperature inversions (rapid increase in temperature with increase in height above the surface) at Nevada Test Site, automatic yield indicators functioned properly on 11 shots on Operation Hardtack, Phase II. Yields ranged from 0.62 ton to 6.5 kt and distances ranged from 2 to 13 miles. On eight of 801. KEYWORD (S) these events, indicated yields were within a factor of 2 of actual yields. Greater errors on the three other events were caused by interference effects resulting from the inversion conditions. This and other blast-wave measurements indicate that factor-of-2 yield estimates can be obtained by the AYI about 70% of the time under strong inversion conditions within the range of 0.1 psi. HARDTACK/; ATOMIC EXPLOSIONS/YIELD; SHOCK WAVES; ERRORS ; EQUIPMENT; YIELD; AUTOMATION; ERRORS Item 20 150. 110. 70. 710. REPORT NUMBER PRIMARY TITLE (M) PERSONAL AUTHOR (M) CORPORATE SOURCE AD--363644/6/XAB Detection of fireball light at distances Oleson, M.H. Air Force Technical Applications Center, AFB, FL (USA) Patrick 750. PUBL. ANNOUNCEMENT ERA-11:051890;EDB-86:159957 371. PUB. DATE (YYMMDD) 580829 34. CLASSIF. LEVEL TEXT unclassified 950. ABSTRACT Attempts were made to detect at long distances the light emitted from the Ivy detonations. Two locations, Johnston Island (3,100 km) and Kwajalein Island (620 km), were chosen. At Kwajalein, in addition to a ground installation, equipment was also mounted in a plane flying above the cloud cover. Measurements were made with red- and blue-sensitive photocelis. Out of a possible total of six records, only one positive 5003385 OFFICIAL USE ONLY