Accession Number : AD0660109

Title :   MULTIPATH PROPAGATION ON TRANSARCTIC HF CIRCUITS,

Corporate Author : KIRUNA GEOPHYSICAL OBSERVATORY (SWEDEN)

Personal Author(s) : Ortner,Johannes ; Owren,Leif

Report Date : 30 OCT 1961

Pagination or Media Count : 29

Abstract : Multipath observations of HF pulse transmissions are discussed as observed on the transpolar propagation path College, Alaska - Kiruna, Sweden. During the winter months the signal strength was unusually high at Kiruna. Furthermore, the signals received on 18 Mc/s showed usually 3 components, with time delays of 3 and 6-7 msec respectively. It is tried to explain the unusual propagation conditions by means of great-circle tilt modes. For the long delayed signal a laterally deviated mode is proposed. (Author)

Descriptors :   (*IONOSPHERIC PROPAGATION, RADIO WAVES), (*RADIO TRANSMISSION, MULTIPLE OPERATION), HIGH FREQUENCY, CIRCUITS, RADIO WAVES, ARCTIC REGIONS, PERIODIC VARIATIONS, REFLECTION, SWEDEN

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE