Polar mesosphere summer echo observations at HF frequencies using the HAARP Gakona Ionospheric Observatory

Details Polar mesosphere summer echo observations at HF frequencies using the HAARP Gakona Ionospheric Observatory Polar mesosphere summer echo observations at HF frequencies using the HAARP Gakona Ionospheric Observatory

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29l..44k&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 12, pp. 44-1, CiteID 1603, DOI 10.1029/2001GL013411

Physics

1

Radio Science: Radio Wave Propagation, Radio Science: Remote Sensing, Radio Science: Ionospheric Propagation (2487), Ionosphere: Ionosphere/Atmosphere Interactions (0335)

Scientific paper

We present initial polar mesosphere summer echo (PMSE) observations over Alaska in the HF band. Echoes were detected near 85 km over 50% of the observation time even though it was late in the PMSE season. The signal-to-noise ratio sometimes exceeded 25 dB. We also present the effects of different transmitted powers and antenna pointing directions on PMSE strength and occurrence. There is some evidence that using 4.5 MHz electron heating occurred, even at the low duty cycle used.

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