Physics
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.3685w&link_type=abstract
Journal of Geophysical Research, vol. 80, Sept. 1, 1975, p. 3685-3688.
Physics
2
Diurnal Variations, Geomagnetism, Interplanetary Magnetic Fields, Polarity, Satellite Observation, Inference, Magnetic Effects, Magnetic Surveys, Real Time Operation, Tables (Data)
Scientific paper
The inferred polarity (toward or away from the sun) of the interplanetary magnetic field at earth using polar observations of the geomagnetic field has been compared with spacecraft observations. A list published by Svalgaard (1974) of the inferred field polarities in the period from 1970 to 1972 is found to be correct on 82% of the days. A near real-time (same day) method of inferring the polarity of the interplanetary magnetic field using geomagnetic observations at Vostok and Thule is in use at the NOAA Space Environment Laboratory, Boulder, Colorado. During 1972, this method is found to be correct on 87% of the days. A list of 'well-defined' sector boundaries at earth from 1970 to 1972 is given.
Hedgecock P. C.
Svalgaard Leif
Wilcox John M.
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