—. aaameanaiaiaaes 1. Prograu Light - ALC (NRL) 26 froject 8,4 ~ Air Attenuation (H. S. Stewart) b. “One Phase, To add to the kuowledge of the effective reige of electromegnetic radiation in the atmosphere as a function of energy end the atmosphere's ambient conditions, both Shots. transmissometer (source, detector, and recorder) assemblies will be Operated over several light paths, For MIG shot, searchlights will be mounted epproximetely 100 feet above sea level on the Perry photo tower, and the sssocieted receiver will te cn hlugeleb, A similer seq-up ~ Will be used between Bogen and Bogelluae This peir of trensmissone te? essemblies will monitor the air ettenuation along their lines of sight at ell tines prior to the shot, end they vill be mede a part of the "gono-go" system in the firing circuite For KinG shot, en ettempt will be made to measure air attenuation between bomb zero and the thermel stations on Perry, Aniyasnii, end biijiri, until some hours prior to the shot. 7s hot epplicevle. 8. " Je a 10. 4 8 il. a s 12. w s " - e 61