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RX and Z Mode Growth Rates and Propagation at Cavity Boundaries

Gurnett, D. A.; Pickett, J. S.; Lucek, E. +5 more

Recent Cluster WBD observations in the Earth's auroral acceleration region have detected trapped Z mode auroral kilometric radiation while the spacecraft were entering a deep density cavity. The Z mode has a clear cutoff at the local upper hybrid resonance frequency, while RX mode radiation is detected above the RX mode cutoff frequency. The small…

AKR Sources Positions - Interball 2 vs CLUSTER Observations

Panchenko, M.; Schreiber, R.; Hanasz, J.

Interball-2 (Auroral Probe) Polrad triaxial spectropolarimeter was used to determine positions of AKR source footprints on the auroral oval. Our findings are consistent with AKR beams narrowly confined to a plane tangent to the source magnetic latitude circle and containing the local magnetic field vector, in agreement with Mutel et al. [2008]. Ou…