Daytime 150-km echoes observed with the Equatorial Atmosphere Radar in Indonesia: First results

Details Daytime 150-km echoes observed with the Equatorial Atmosphere Radar in Indonesia: First results Daytime 150-km echoes observed with the Equatorial Atmosphere Radar in Indonesia: First results

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3506101p&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 6, CiteID L06101

Other

5

Ionosphere: Ionospheric Dynamics, Ionosphere: Ionospheric Irregularities, Ionosphere: Plasma Waves And Instabilities (2772)

Scientific paper

Results of the daytime 150-km echoes from 10.36°S magnetic latitude observed using the Equatorial Atmosphere Radar (EAR), which are first of its kind from magnetic southern hemisphere, are presented. The echoing region of 145-165 km shows forenoon descent and afternoon ascent with signal intensity modulation with time resembling a necklace and the Doppler spectra are narrow, which are quite similar to those reported earlier from other locations. Westward and upward/southward irregularity drifts are found to be consistent with daytime background electric fields, providing a tool to investigate low latitude daytime electrodynamics. Detectability of these echoes suggests the absence of strong latitudinal dependence in contrast to the earlier belief, suggesting a possibility of their detection at mid-latitudes. Also the echoes show zonal anisotropy that is opposite to that observed over Pohnpei. The implications of these observations are discussed in the light of present understanding of 150-km echoing phenomenon.

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