Irregularity drift velocities in the equatorial electrojet observed by both the close-spaced antenna technique and the Doppler radar method

Details Irregularity drift velocities in the equatorial electrojet observed by both the close-spaced antenna technique and the Doppler radar method Irregularity drift velocities in the equatorial electrojet observed by both the close-spaced antenna technique and the Doppler radar method

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jatp...39.1035t&link_type=abstract

(IUGG, IAGA, COSPAR, URSI, NOAA, USAF, Australian Academy of Science, and Australian Institute of Physics, International Symposi

Mathematics

Logic

1

Doppler Radar, Equatorial Electrojet, Ionospheric Drift, Radar Measurement, Reception Diversity, Drift Rate, Meteorological Radar, Phase Coherence, Wind Shear

Scientific paper

Two experimental methods, the close-spaced receiver technique (D1), and the phase coherent Doppler system (both HF and VHF), were employed to obtain electrojet drift data in Chad during a June 1973 solar eclipse. Two different frequencies were used on separate radars in the Doppler system: 50 MHz and 21 MHz. The data were then compared. It was found that D1 drift data are in excess of the Doppler data by more than a factor of two. In addition, reversals which are not recorded by the Doppler data due to cross field instability are associated with the D1 data. These discrepancies indicate that the two techniques measure distinctly different structures in the equatorial E-region, i.e., the Doppler technique detects westward drift under normal daytime conditions, while the D1 method might detect irregularities produced by a wind shear mechanism.

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