Accession Number : AD0265925

Title :   THE TRANSMISSION OF LIGHT SIGNALS BEYOND THE HORIZON

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : CURCIO,J.A. ; KNESTRICK,G.L.

Report Date : 01 OCT 1961

Pagination or Media Count : 24

Abstract : A preliminary investigation of the transmission of light signals beyond the horizon is presented. For certain assumed, clear-atmosphere parameters, calculations were made of the signal available from a projected source. The signal strength is given as a function of wavelength and of distance when receiver and projector are at zero elevation. For most atmospheric conditions, the infrared is the best wavelength region from the standpoint of maximum flux transmission over large distances. The available flux is drastically attenuated as the distance is increased, although discernible flux at distances of several hundred kilometers appears to be obtainable. A few experimental data show reasonable agreement with the computed predictions of signal strength as a function of wavelength and range based on the Junge-type atmospheric model. (Author)

Descriptors :   *ATMOSPHERES, *LIGHT TRANSMISSION, *SIGNALS, *TWILIGHT, AEROSOLS, AREA BOMBING, EQUATIONS, EXPERIMENTAL DATA, INFRARED RADIATION, INSTRUMENTATION, NUCLEAR EXPLOSIONS, PARTICLES, SKY BRIGHTNESS, TABLES(DATA)

Distribution Statement : APPROVED FOR PUBLIC RELEASE