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Remote ion temperature measurements of Earth's magnetosphere: Medium energy neutral atom (MENA) images
Author(s) -
Scime E. E.,
Keesee A. M.,
Jahn J.M.,
Kline J. L.,
Pollock C. J.,
Thomsen M.
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013994
Subject(s) - magnetosphere , ion , energetic neutral atom , physics , geomagnetic storm , observatory , spectral line , asymmetry , plasma , atomic physics , solar wind , astrophysics , astronomy , quantum mechanics
Energy spectra of ENA images obtained with the MENA imager on the IMAGE observatory are used to construct remote images of the plasma ion temperature. The remotely measured ion temperatures are consistent with in‐situ ion temperature measurements. During the storm of August 12, 2000, the ion temperatures on the dawn side of the magnetosphere are significantly lower than the dusk side ion temperatures. Similar observations of ion temperature asymmetry are presented for three other storm periods.