Characterizing the mass composition of the inner magnetosphere using ground and space-based techniques

Details Characterizing the mass composition of the inner magnetosphere using ground and space-based techniques Characterizing the mass composition of the inner magnetosphere using ground and space-based techniques

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm51c0555b&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM51C-0555

Other

2730 Magnetosphere: Inner, 2768 Plasmasphere, 2794 Instruments And Techniques, 2799 General Or Miscellaneous

Scientific paper

Electron number density measurements from IMAGE RPI are combined with ULF resonance-ground magnetometer derived mass density estimates during times of IMAGE and MEASURE ground magnetometer array conjunctions to determine the average composition of the plasmasphere during quiet times. Many studies have been performed to characterize the plasma density profile of the inner magnetosphere. The usual result is that the equatorial electron density decreases as a function of distance from the Earth. On the other hand, the mass density profile of the inner magnetosphere has not been extensively studied due to the difficulty of making direct measurements from spacecraft and the fact that ground-based techniques developed for remotely sensing mass density tend to be tedious to perform by hand. Recently, an automated process for estimating the mass density of the inner magnetosphere using pairs of ground magnetometers has been developed by Berube et al. The Radio Plasma Imager (RPI) on board the IMAGE spacecraft makes in situ measurements of magnetospheric electron density. By combining electron density measurements from RPI with mass density estimates obtained using ground techniques we are able to constrain the plasma composition of the inner magnetosphere for instances when IMAGE is in conjunction with the field lines spanned by ground stations.

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