Other
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93..923c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Feb. 1, 1988, p. 923-931.
Other
15
Dmsp Satellites, Earth Magnetosphere, Polar Cusps, Satellite Observation, Space Plasmas, Conjugate Points, Interplanetary Magnetic Fields, Statistical Analysis
Scientific paper
A set of 118 pairs of nearly simultaneous polar cusp observations over opposite hemispheres, taken by two identically instrumented satellites on orbits that are very close to each other, is used to determine the morphology of the conjugate polar cusps. It is found that the general mirror image picture does not extend to the precision of a fraction of a degree in magnetic latitude. Only 54 percent of the equatorial boundary observations and 32 percent of the poleward boundary observations are within + or - 1 deg of the conjugate location. The influences of the earth's magnetic dipole tilt, of geomagnetic activity, and of the IMF parameters on the cusp asymmetry are investigated; no unique parameter is found to better organize the conjugacy of the two cusps. Rather, all of these parameters appear to have a slight effect on the relative locations of the opposite polar cusps. The difference in magnetic latitudes between boundaries of conjugate polar cusp regions depends on the latitude of the cusp location.
Candidi Maurizio
Meng Ching I.
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