DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
THE TRANSMISSION OF LIGHT SIGNALS BEYOND THE HORIZON
NAVAL RESEARCH LAB WASHINGTON D C
Pagination or Media Count:
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
APPROVED FOR PUBLIC RELEASE