Physics
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3314108l&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 14, CiteID L14108
Physics
19
Ionosphere: Wave Propagation (0689, 3285, 4275, 4455, 6934), Magnetospheric Physics: Substorms, Ionosphere: Auroral Ionosphere (2704), Magnetospheric Physics: Auroral Phenomena (2407), Magnetospheric Physics: Magnetotail
Scientific paper
The occurrence of Pi1B pulsations is well-documented, including the fact that these pulsations can be observed both on the ground and at geosynchronous orbit at substorm onset, although information about their propagation characteristics has been lacking. In this paper, data are presented from FAST, GOES 9 and various ground stations that show the simultaneous observations of Pi1B pulsations in association with an onset. While the data at GOES 9 show that the pulsations are compressional in nature, data from FAST show the presence of shear mode waves, implying that Pi1B mode conversion of some type must take place in the region between geosynchronous orbit and FAST altitudes. An additional point is that Pi1B pulsations apparently propagate through auroral phenomena routinely, begging the question of what role they may play.
Arnoldy Roger L.
Engebretson Mark J.
Hayashi Kumiko
Jones Scott L.
Lessard Marc R.
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