Observations of ionospheric magnetospheric coupling - DE and Chatanika coincidences

Details Observations of ionospheric magnetospheric coupling - DE and Chatanika coincidences Observations of ionospheric magnetospheric coupling - DE and Chatanika coincidences

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.5803g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, May 1, 1986, p. 5803-5815.

Physics

19

Ionospheric Disturbances, Magnetosphere-Ionosphere Coupling, Magnetospheric Instability, Radar Measurement, Satellite Observation, Coupled Modes, Dynamics Explorer Satellites, Plasma Density, Positive Ions, Space Plasmas, Vertical Distribution

Scientific paper

Observations from several experiments on board the Dynamics Explorer 1 and 2 (DE 1 and 2) spacecraft and ground-based radar measurements from the Chatanika radar are combined in order to examine the details of ionospheric/magnetospheric coupling in the local evening sector. DE 1 and DE 2 were in coplanar polar orbits that provided measurements almost simultaneously in time and magnetically coincident with the Chatanika radar from L = 3 to L = 17. The coupling processes are inferred from the density, temperature, composition, and angular distributions of the low-energy plasma observed from the E region of the ionosphere to magnetospheric altitudes of 2.5 earth radii. Plasma characteristics of the plasmasphere, main trough, auroral zone, and polar cap can be studied in this data set. The observations imply that as L increases, the dominant coupling mechanism between the ionosphere and magnetosphere in the measured energy range changes from equilibrium diffusion to perpendicular acceleration and finally to parallel acceleration.

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