Accession Number : AD0363644

Title :   DETECTION OF FIREBALL LIGHT AT DISTANCES

Corporate Author : AIR FORCE TECHNICAL APPLICATIONS CENTER WASHINGTON D C

Personal Author(s) : Oleson,M. H.

Report Date : 29 AUG 1958

Pagination or Media Count : 19

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 photocells. Out of a possible total of six records only one positive detection was made and this was from the equipment in the plane on the occasion of King shot. The remaining cases are accounted for as follows: Three cases were timing notification uncertainties which make it impossible to state that the equipment was operating at detonation time; one case where it is known that the equipment was operating at the right time but there is no record of the light signal. It is concluded that light from a nuclear detonation can be detected to a distance of about 600 km under favorable conditions. Any further work should emphasize a basic study of the phenomena involved in the transmission of light beyond the horizon. (Author)

Descriptors :   (*NUCLEAR EXPLOSIONS, LIGHT)

Subject Categories : Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE