Accession Number : ADA034806


Title :   OPSATCOM Field Measurements. Volume 1


Descriptive Note : Research and development rept. Jun-Aug 1975


Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA


Personal Author(s) : Driscoll, R. G. ; Martin, J. N. ; Karp, S.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA034806


Report Date : 01 JUN 1976


Pagination or Media Count : 622


Abstract : The ability of light to penetrate the sea to operationally useful depths, the ease with which optical energy can be generated and modulated, and the ability to direct this energy into narrow beams utilizing small antennas (optical systems) illustrate the theoretical feasibility of optical communication links in the sea. For example, when the proportionate sea path is limited to lengths of hundreds of feet (or meters), optical communication links between an earth orbiting satellite and submerged terminals appear possible. Before such optical communication links become practical, phenomena reported in the literature must be quantified to reliably predict system performance. This is necessary for systematic design and evaluation of terminals. For example, optical beam spreading, attenuation, air/sea interface effects, and background radiant intensities must all be documented to be used for component development. With these objectives in mind, an experiment designed to measure the propagation characteristics of light in the ocean was conducted in the vicinity of Santa Catalina Island, California, between June and August 1975.


Descriptors :   *SATELLITE COMMUNICATIONS , *LASER COMMUNICATIONS , *UNDERWATER COMMUNICATIONS , SUBMARINE EQUIPMENT , LASER BEAMS , RADIATION ATTENUATION , LIGHT TRANSMISSION , VISIBLE SPECTRA , DYE LASERS , BLUE(COLOR) , BACKGROUND RADIATION , SEA WATER , GREEN(COLOR).


Subject Categories : ATMOSPHERIC PHYSICS
      PHYSICAL AND DYNAMIC OCEANOGRAPHY
      NON-RADIO COMMUNICATIONS


Distribution Statement : APPROVED FOR PUBLIC RELEASE