Accession Number : ADA262283


Title :   A Review of the Ionospheric Model for the Long Wave Prediction Capability


Descriptive Note : Final rept.


Corporate Author : NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA


Personal Author(s) : Ferguson, J A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262283.pdf


Report Date : Nov 1992


Pagination or Media Count : 46


Abstract : The Naval Command, Control and Ocean Surveillance Center's Long Wave Prediction Capability (LWPC) has a built-in ionospheric model. The latter was defined after a review of the literature comparing measurements with calculations. Subsequent to this original specification of the ionospheric model in the LWPC, a new collection of data were obtained and analyzed. The new data were collected aboard a merchant ship named the Callaghan during a series of trans-Atlantic trips over a period of a year. This report presents a detailed analysis of the ionospheric model currently in use by the LWPC and the new model suggested by the shipboard measurements. We conclude that, although the fits to measurements are almost the same between the two models examined, the current LWPC model should be used because it is better than the new model for nighttime conditions at long ranges. This conclusion supports the primary use of the LWPC model for coverage assessment that requires a valid model at the limits of a transmitter's reception.... Communications, Very low frequency and low frequency, High voltage, Antennas, Measurement.


Descriptors :   *COMMUNICATION AND RADIO SYSTEMS , *IONOSPHERIC MODELS , *RADIO WAVES , FREQUENCY , MEASUREMENT , SCATTERING , PREDICTIONS , MODELS , SPECIFICATIONS , WAVE PROPAGATION , ANTENNAS , SHIPBOARD , RECEPTION , LONG WAVELENGTHS , SURVEILLANCE , LOW FREQUENCY , HIGH VOLTAGE , OCEAN SURVEILLANCE , VERY LOW FREQUENCY , SUNSPOTS , IONOSPHERIC DISTURBANCES


Subject Categories : Atmospheric Physics
      Radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE