Remote Measurements of Ion Temperatures in the Terrestrial Magnetotail

Details Remote Measurements of Ion Temperatures in the Terrestrial Magnetotail Remote Measurements of Ion Temperatures in the Terrestrial Magnetotail

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm43c..05k&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SM43C-05

Other

2744 Magnetotail, 2764 Plasma Sheet, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

A number of studies have reported ion temperatures in the magnetotail using single point, in situ measurements. The disadvantage of these measurements is the inability to distinguish between spatial and temporal variations as well as observe multiple locations at the same time. Energetic Neutral Atom Imaging can provide remote ion temperature measurements that are spatially and temporally resolved. Remote ion temperature measurements of the magnetosphere from 10 RE to -60 RE will be presented for the first 48 hours of the storm of 4-7 October 2000. The calculated ion temperatures in the magnetotail are consistent with in situ measurements from multiple geosynchronous spacecraft and GEOTAIL. The measurements indicate two separate instances of an Earthward propagating increase in ion temperature during the storm and one instance of a tailward propagating increase in ion temperature. At -12 RE, the remotely measured ion temperatures are consistent with predictions of a solar wind velocity correlation equation only when the solar wind-magnetospheric coupling is strong. At other times, the predicted ion temperature is 2-3 times smaller than the measured value.

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