Fennell, J. F.,
Co-Authors: J B Blake, and J L Roeder,
Title: Tail Lobe Entries at Low to Moderate Latitudes,
Reference: AGU Spring Meeting, Baltimore, MD, May 20-24, 1996.
Reference Type: Contributed Talk
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Abstract:
Tail lobe entries are rarely observed by low latitude satellites, such as CRRES, away from local midnight. CRRES usually experienced them during the recovery period following sudden commencement related magnetic storms and/or high solar wind pressure intervals. The CRRES tail lobe entries were usually coincident with large increases in the local magnetic intensity and signatures of strong current systems. They also occurred for magnetic latitudes from ~10#161# up to the maximum CRRES latitudes (~28#161#). The magnetospheric conditions and latitudinal positions for recent tail lobe entry data taken at medium altitudes by the NASA POLAR and a new Aerospace satellite will be presented and compared with the CRRES results. The new Aerospace satellite has a highly elliptical orbit with an apogee ~7.2 Re and an inclination of 63#161# and it crosses into the tail lobe nearly every orbit. POLAR is in a ~2 X 9 Re orbit inclined at ~86#161# and crosses into the polar cap every orbit. The energetic particle and plasma measurements on both CRRES, POLAR and the new Aerospace satellite provide a detailed picture of the particle populations during tail lobe entries. Tail lobe entries at different local times will be the primary focus of this study. The interplanetary conditions will be compared with the new boundary positions taken at the mid altitudes.
