The SEGMA array: current status

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Presentation transcript:

The SEGMA array: current status M. Vellante Physics Department, University of L’Aquila, Italy ULTIMA Meeting Tsukuba, Japan 14 November 2008 1

SEGMA: South Europe GeoMagnetic Array Cooperating institutions: University of L’Aquila, Italy Space Research Institute (IWF), Graz, Austria Geodetic and Geophysical Research Institute, Sopron, Hungary Geophysical Institute, Sofia, Bulgaria 2

Map of the recording stations of the SEGMA array NCK CST RNC PAG AQU Map of the recording stations of the SEGMA array 3

SEGMA array, coordinates of the recording stations Geograph. Coord. CGM L Start of operation Magnetometer type Nagycenk (NCK) 47.63 N 16.73 E 42.79 N 91.41 E 1.89 1999 fluxgate Castello Tesino (CST) 46.05 N 11.65 E 40.84 N 86.63 E 1.78 2000 Ranchio (RNC) 43.97 N 12.08 E 38.28 N 86.58 E 1.65 2001 L’Aquila (AQU) 42.38 N 13.32 E 36.33 N 87.37 E 1.57 1985 fluxgate, induction Panagyurishte (PAG) 42.51 N 24.18 E 37.02 N 97.24 E 1.60 2003 4

Main features of the fluxgate instrument and data acquisition: 0.01 nT resolution Max. data rate 64 vectors/sec Standard final sampling rate: 1Hz Absolute time via GPS receiver Check operations and data recovery made frequently at AQU, NCK and PAG. Once every 1-2 months at CST and RNC. 5

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- user defined magnetograms: From the WEB site of SEGMA (http://sole-terra.aquila.infn.it/staz_segma.asp?lang=en) it is possible to get: - user defined magnetograms: - cross-phase spectra (daily and monthly vision): 8

Scientific objectives General purpose: Investigation of the dynamical features of the solar wind – magnetosphere interaction. Ground support to space missions. Specific objectives: Understanding of generation mechanisms of ULF waves in the magnetosphere, relation with solar wind conditions. Understanding of propagation characteristics of ULF waves, transformation they undergo in the magnetosphere (resonances) and in the transmission through the ionosphere. Study of connection between Pi2 pulsations and geomagnetic substorms. Monitoring of plasma mass density in the plasmasphere and ionosphere by means of detection of field line resonances. 9

Thank you for your attention 10

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