![]() ![]() The results in this study indicate that the implementation of TAIL and SRC currents in TS05 model is more successful than that for the FAC current. For all stations the highest correlations among observations and TS05 simulations are obtained for stronger geomagnetic activity. The currents that contribute most to Y component are FAC and PRC currents. It was found that currents that contribute most to the X component during geomagnetic active periods are the cross-tail (TAIL), the symmetric ring (SRC) and the partial ring (PRC) currents. Results are less favourable for the East-West (or Y ) component, probably due to the fact that TS05 model closes Birkeland (or field-aligned, FAC) currents through the Earth’s centre instead of through the ionosphere. It was verified that TS05 is efficient to reproduce the X component of terrestrial magnetospheric field at mid-latitudes during high geomagnetic activity time, with correlations r ≥ 0.7 in ∼50% of compared data, presenting a lower efficiency during calm time, with correlations r ≥ 0.7 only in ∼30% of data compared. It was found that TS05 model is a useful tool to explain ground-based North-South (or X) component of geomagnetic activity at mid-latitudes, in terms of main current sources. An evaluation of TS05 model is presented, in order to determine the model ability to reproduce both the total magnetospheric transient signal and to explain this signal through the contribution of each TS05 magnetospheric current system at ground level, comparing them with hourly data of the four geomagnetic stations selected. For this purpose, I compared the synthetic series of six magnetospheric current systems computed with the data-based semi-empirical model of Tsyganenko and Sitnov 2005 (TS05), with the measurements of four mid-latitude geomagnetic stations at very near geomagnetic latitudes, but well apart in longitude (Coimbra (COI), Portugal Panagyurishte (PAG), Bulgary Novosibirsk (NVS), Russia Boulder (BOU), USA), and with other ground and satellite-based solar, interplanetary and geomagnetic parameters obtained from the OMNI/NASA database. NASA Space Physics Data Facility.The focus of this thesis is to identify the role and dynamics of different current systems for storm-time activity at mid-latitude ground level and their relation with other solar, interplanetary and geomagnetic parameters, in the 2007-2016 time interval. Parker Solar Probe (PSP) Merged Magnetic Field, Plasma, and Ephemeris, Hourly Data. Proton most probable thermal speed, radial component, from 1-dimensional maxwellian Fitting, only good qualityĬitation: Papitashvili, N.Total proton number density from 1-dimensional Maxwellian fitting, only good quality. ![]() ![]() Proton bulk velocity from 1-dimensional Maxwellian fitting, only good quality, in the inertial RTN frame.The original PSP magnetic field data comes from the PSP_FLD_L2_MAG_RTN_1MIN data product while the original plasma data comes from the PSP_SWP_SPC_元I data product by applying the following conditions: The PSP COHO file include data derived from the PSP FIELDS Fluxgate Magnetometer data as well as Densities, Vector Velocities, and Scalar Radial Component Temperatures of Solar Wind Protons measured by the PSP SWEAP Solar Probe Cup, SPC. The NSSDC Coordinated Heliospheric Observations Web, COHOWeb, hourly and daily Parker Solar Probe, PSP, data were made by using high resolution data from from CDAWeb. ![]()
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