Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter

Details Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter Morning sector drift-bounce resonance driven ULF waves observed in artificially-induced HF radar backscatter

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002angeo..20.1487b&link_type=abstract

Annales Geophysicae, vol. 20, Issue 9, pp.1487-1498

Physics

12

Scientific paper

HF radar backscatter, which has been artificially-induced by a high power RF facility such as the EISCAT heater at Tromsø, has provided coherent radar ionospheric electric field data of unprecedented temporal resolution and accuracy. Here such data are used to investigate ULF wave processes observed by both the CUTLASS HF radars and the EISCAT UHF radar. Data from the SP-UK-OUCH experiment have revealed small-scale (high azimuthal wave number, m -45) waves, predominantly in the morning sector, thought to be brought about by the drift-bounce resonance processes. Conjugate observations from the Polar CAM-MICE instrument indicate the presence of a non-Maxwellian ion distribution function. Further statistical analysis has been undertaken, using the Polar TIMAS instrument, to reveal the prevalence and magnitude of the non-Maxwellian energetic particle populations thought to be responsible for generating these wave types.

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