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A numerical study of tropospheric ducting at HF
Author(s) -
Pappert R. A.,
Goodhart C. L.
Publication year - 1979
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs014i005p00803
Subject(s) - radiosonde , troposphere , atmospheric duct , transmission loss , meteorology , basis (linear algebra) , physics , computational physics , path loss , environmental science , waveguide , geodesy , geology , mathematics , telecommunications , optics , computer science , atmosphere (unit) , geometry , wireless
In this paper, path loss calculations for frequencies between 4 and 32 MHz are compared with Hansen's recent measurements on a 235‐km over‐ocean southern California path. The calculations involve standard waveguide theory along with available radiosonde data and show convincingly that signal enhancement, relative to that expected on the basis of ground wave theory, observed on frequencies greater than 20 MHz was due to superrefractive environments.