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Ion Outflow and Convection in the Polar Cap and Cleft as Measured by Tide, EFI, MFE and TimasThis study examines high-latitude ion outflows and velocities perpendicular to the magnetic field derived from moments of ion distributions measured by the TIDE (Thermal Ion Dynamics Experiment) instrument on the Polar satellite. Hydrogen and oxygen ions are shown to be E X B drifting in the polar cap and cleft regions with a speed of about 5-20 km/s at apogee (approximately 9 Re) and a speed of 1-2 km/s at perigee (approximately 1. 8 Re). E X B drifts are calculated from electric fields measured by EFI (Electric Field Instrument) and magnetic fields measured by MFE (Magnetic Field Experiment) both of which are also on Polar. How convection at Polar's perigee relates to potential patterns of the ionosphere will be discussed. In the cusp/cleft the distribution of hydrogen extends over a large enough range of energy to be measured by both TIDE and the Toroidal Imaging Mass-Angle Spectrograph (TIMAS). Such comparisons will be also be presented.
Document ID
19990079782
Document Type
Reprint (Version printed in journal)
Authors
Elliott, H. A.
(Alabama Univ. Huntsville, AL United States)
Craven, P. D.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Chandler, M. O.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Moore, T. E.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Maynard, N. C.
(Mission Research Corp. Nashua, NH United States)
Peterson, W. K.
(Lockheed Martin Palo Alto Research Lab. Palo Alto, CA United States)
Lennartsson, O. W.
(Lockheed Martin Palo Alto Research Lab. Palo Alto, CA United States)
Shelley, E. G.
(Lockheed Martin Palo Alto Research Lab. Palo Alto, CA United States)
Mozer, F. S.
(California Univ. Berkeley, CA United States)
Russell, C. T.
(California Univ. Los Angeles, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1997
Subject Category
Geophysics
Distribution Limits
Public
Copyright
Other
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