We present the analysis of a Pc 3 geomagnetic pulsation event observed simultaneously by CHAMP and by the South European GeoMagnetic Array SEGMA (1.56 < L < 1.88) during the conjunction of July 6, 2002. Both compressional and transverse oscillations were identified in CHAMP magnetic measurements. A close correspondence between the compressional component and the ground signals is observed. At the same time the joint analysis of space and ground observations clearly indicates the occurrence of a field line resonance at L congruent to 1.6. A direct confirmation of the well known 90degrees rotation of the ULF wave polarization ellipse through the ionosphere is also provided
ULF wave magnetic measurements by CHAMP satellite and SEGMA ground magnetometer array: Case study of July 6, 2002
DE LAURETIS, Marcello;
2005-01-01
Abstract
We present the analysis of a Pc 3 geomagnetic pulsation event observed simultaneously by CHAMP and by the South European GeoMagnetic Array SEGMA (1.56 < L < 1.88) during the conjunction of July 6, 2002. Both compressional and transverse oscillations were identified in CHAMP magnetic measurements. A close correspondence between the compressional component and the ground signals is observed. At the same time the joint analysis of space and ground observations clearly indicates the occurrence of a field line resonance at L congruent to 1.6. A direct confirmation of the well known 90degrees rotation of the ULF wave polarization ellipse through the ionosphere is also providedPubblicazioni consigliate
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