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The International Service of Geomagnetic Indices (ISGI) is in charge of the elaboration and dissemination of geomagnetic indices, and of tables of remarkable magnetic events, based on the report of magnetic observatories distributed all over the planet, with the help of ISGI Collaborating Institutes. The interaction between the solar wind, including plasma and interplanetary magnetic field, and the Earth's magnetosphere results in a transfer of energy and particles inside the magnetosphere. Solar wind characteristics are highly variable, and they have actually a direct influence on the shape and size of the magnetosphere, on the amount of transferred energy, and on the way this energy is dissipated. It is clear that the great diversity of sources of magnetic variations give rise to a great complexity in ground magnetic signatures. Geomagnetic indices aim at describing the geomagnetic activity or some of its components. Each geomagnetic index is related to different phenomena occurring in the magnetosphere, ionosphere and deep in the Earth in its own unique way. The location of a measurement, the timing of the measurement and the way the index is calculated all affect the type of phenomenon the index relates to. The IAGA endorsed geomagnetic indices and lists of remarkable geomagnetic events constitute unique temporal and spatial coverage data series homogeneous since middle of 19th century.
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Open Data DK has established a governance model to ensure that the members perceive the association as open, equal and result-creating. Open Data DK is a union with a board and teams. The Board is the general and strategic forum and consists of a chairman and five board members. The General Assembly is the Association's decision-making body and highest authority. The individual teams coordinate efforts within specific focus areas. Governance model with teams must support the need to coordinate the work as well as possible while taking into account the autonomy that the individual teams have in terms of the democratic basic element on which the association is based. The gain of using this form of organization is a joint work across the members of the association.