Accession Number : ADA306385

Title :   A Study of Observed and Predicted HF Propagation Characteristics at High Latitudes,

Corporate Author : NORWEGIAN DEFENCE RESEARCH ESTABLISHMENT KJELLER

Personal Author(s) : Jodalen, Vivianne

PDF Url : ADA306385

Report Date : 29 FEB 1996

Pagination or Media Count : 169

Abstract : Prediction programmes at HF serve as tools for system design, frequency management and daily operations of communication systems. Models used in the prediction programmes of radio propagation through the high latitude ionosphere have relied on extrapolation from low latitudes, and they are inconsistent and incorrect. An HF oblique incidence ionospheric sounder has been developed at FFI and data recorded on one auroral path (285 km) and one sub-auroral, mid-latitude path (1230 km) within Norway. The database contains several years of measurements around sunspot maximum, and it describes the effects of seasonal variations and different degrees of geophysical disturbances.

Descriptors :   *IONOSPHERIC PROPAGATION, DATA BASES, HIGH FREQUENCY, SEASONAL VARIATIONS, AURORAE, NORWAY, RADIO TRANSMISSION, HIGH LATITUDES, DIURNAL VARIATIONS, SUNSPOTS, FREQUENCY ALLOCATION.

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE