Physics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....8611251g&link_type=abstract
Journal of Geophysical Research, vol. 86, Dec. 1, 1981, p. 11251-11257.
Physics
16
Earth Magnetosphere, Geomagnetism, Ionospheric Drift, Magnetic Surveys, Magnetohydrodynamic Waves, Satellite Observation, Correlation Coefficients, Cross Correlation, Geos 2 Satellite, Power Spectra, Spectrum Analysis, Synchronous Satellites
Scientific paper
It is pointed out that if ionospheric and magnetospheric regions showing highly correlated temporal variations could be identified, it would be possible to determine the region in the ionosphere conjugate to a given location in the magnetosphere. A cross-correlation analysis is presented of Pc 5 magnetic field oscillations observed by GEOS 2 with drift velocity oscillations (electric field) observed with the STARE radars in the ionosphere. It is noted that GEOS 2 is in geostationary orbit with its conjugate point nominally located in the STARE field of view. Several comparisons are made over a 1-hour period in the early afternoon sector, and correlation coefficients reaching 0.84 over a limited area in the ionosphere are obtained. It is found that between the beginning and end of the hour, the measured footpoint is displaced by approximately 1 deg in latitude and approximately 2.5 deg in longitude.
Candidi Maurizio
Greenwald Ray A.
Walker D. M. A.
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