Accession Number : ADP006158

Title :   Long Wave Propagation Assessment,

Corporate Author : NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA

Personal Author(s) : Ferguson, Jerry A.

Report Date : SEP 1989

Pagination or Media Count : 8

Abstract : This paper describes the long wavelength propagation capability of the Naval Ocean Systems Center. This capability applies the concept of the earth-ionosphere waveguide to very low frequency (vlf: 10 kHz to 30 kHz) and low frequency (lf: 30 kHz to 100 kHz) radio propagation. It is used to perform assessment of communications coverage at long wavelengths via graphical displays of signal strength and signal to noise over individual propagation paths and over large geographical areas. The propagation assessment capability is a collection of computer programs which are exercised separately or in sequence depending on the application. The execution of these individual programs for purposes of obtaining coverage maps can be set up by a driver program which automates the process. At the present time, this driver program implements the sequencing of the programs via Digital Equipment's VAX VMX control language.

Descriptors :   *RADIO TRANSMISSION, *LONG WAVELENGTHS, *COMPUTER PROGRAMS, ATMOSPHERICS.

Subject Categories : Radio Communications
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE