Uniformly spaced field-aligned ionization ducts

Details Uniformly spaced field-aligned ionization ducts Uniformly spaced field-aligned ionization ducts

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.8986g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Oct. 1, 1984, p. 8986-8996.

Computer Science

Sound

10

Ionograms, Ionospheric Electron Density, Ionospheric Sounding, Satellite Sounding, Ducts, Equatorial Atmosphere, Isis Satellites, Ray Tracing

Scientific paper

A number of interesting cases of combination mode ducted echoes for mid- and low-latitude regions are presented that show nearly uniformly spaced multiple combination mode traces on the ionograms in the frequency range above 1 MHz. These traces suggest that a parallel system of field-aligned ducts is present. Ray tracing studies are made to determine the structure that would explain the observations using the electron density profile derivable from the vertical trace and assuming field-aligned ducts. Spacing perpendicular to the ducts is found to be as much as 70 km. Some of these parallel duct structures are found to extend to the conjugate hemisphere, possibly to the F peak.

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