Friis-Christensen, Eigil
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Interplanetary magnetic sector polarity inferred from polar geomagnetic field observations
1971
2839
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Scientific report. 92-3 : Global temperature variations and a possible association with solar activity variations
1992
2986
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Critical component of the interplanetary magnetic field responsible for large geomagnetic effects in the polar cap
1972
1614
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Scientific report. 89-5 : Ground magnetic perturbations in the polar cap and cleft: relationship with the IMF
1989
2151
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Polar Cap currents for different directions of the interplanetary magnetic field in the y-z plane
1974
2733
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Scientific report. 89-1 : Large scale distribution of discrete auroras and field aligned currents
1989
2642
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Global temperature variations and a possible association with solar activity variations
1992
2087
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Ground magnetic perturbations in the polar cap and cleft : Structure a. dynamics of ionospheric currents
1989
905
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Scientific report. 93-10 : Critical assessment of selected solar activity parameters: 1500 - 1990
1993
849
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