Sage 36 Order number see's with 102 oOPEIGEALUSE ONLY 9$40406-171827-13 34. CLASSIF. LEVEL TEXT Unclassified Simplified, empirical equations are Rresented 950. ABSTRACT which allow determination of the incident thermal radiation on a receiver in the vicinity of a nuclear detonation. The equations are essentially curve fits to the thermal energy values calculated by the Chapman and Seavey prediction technique (AFCRC-TN-54-25) for both ground and air bursts and for a variety of atmospheric and geophysical parameters. The simplified equations correlate very well with the thermal energy data obtained during Operation Redwing. The thermal energy equations for the specific type days standardized by the Air Force in their nuclear weapons capabilities studies are included in the report. Sample calculations employing the simplified equations and a summary of the pertinent equations are presented in appendixes. 5 801. KEYWORD(S) references. THERMAL RADIATION/;ATOMIC EXPLOSIONS/thermal radiation ;ATMOSPHERIC BURSTS/thermal radiation ; REDWING/; AIRCRAFT INSTRUMENTS; SURFACE BURSTS; REDWING; EQUATIONS; SAFE SHPARATION TIME; FORECASTING Item 65 150. REPORT NUMBER 110. PRIMARY TITLE (M) 70. 710. 371. 34. 950. LA--3409-MS (Supp1.) Prompt air fluorescence excited by high altitude nuclear explosions. Photoelectric instrumentation and the high altitude fluorescence (HAF) and high altitude resonance absorption calculation PERSONAL AUTHOR (M) CORPORATE SOURCE PUB. DATE (YYMMDD) (HARAC) Bennett, E.W.; Holland, R.F. Los Alamos 660504 Scientific Lab., NM codes (USA) CLASSIF. LEVEL TEXT Unclassified ABSTRACT Details of the design, calibration, and use of the photoelectric log box detectors used to obtain air fluorescence data are given. Descriptions of the High Altitude Fluorescence (HAF) and High Altitude Resonance Absorption Calculation (HARAC) machine codes are 801. KEYWORD (S) 9003810 presented. These sections are concerned mainly with assumptions, derivations, and some program features of the codes; no coding details are provided. The procedures used to obtain absorption cross sections for use in HARAC are described, including a discussion of the assumptions and the approximation used “to account for the rotational structure. The importance of some neglected processes is discussed. Results of calculations on specific events and their use in analysis of the Dominic and Hardtack air fluorescences data are given in the classified part of this report. ATMOSPHERIC BURSTS/teller light ;FLUORESCENCE/; OFFICIAL USE ONLY