Physics
Scientific paper
Feb 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3504106k&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 4, CiteID L04106
Physics
2
Ionosphere: Ionospheric Irregularities, Ionosphere: Equatorial Ionosphere, Radio Science: Ionospheric Physics (1240, 2400), Radio Science: Remote Sensing
Scientific paper
The first results from the 430 MHz Advanced Modular Incoherent Scatter Radar Prototype (AMISR-P) at the Jicamarca Radio Observatory were reported by Hysell et al. (2007). We present additional data showing that the phase velocity of Type I echoes is independent of zenith angle, an unexplained property of these waves. We interpret the results using rocket data by predicting the total line-of-sight velocity at the four zenith angles used. We find that the radars preferentially detect waves within 10% of C s in at least four range gates for all beams and up to eight range gates for the 51 JULIA beam. This result is consistent with recent auroral observations that Type I waves are only generated with k vectors near the electron flow velocity, where the latter is the vector sum of the zero-order drift and the perturbation drift due to large-scale waves in the equatorial case.
Cuevas R. A.
Hysell Dave L.
Kelley Michael C.
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