Abstract
The BREM-STAR/TIGER-STAR satellite represents a dedicated low-cost concept for 3D monitoring of the thermosphere/ionosphere (T/I) to be conducted during an overlapping period of the ISS SOLAR mission. The primary goal is to execute precise radiometric measurements of the variable solar and terrestrial extreme ultraviolet/ultraviolet (EUV/UV) radiation and their impact on the T/I system. In combination with high-frequency measurements of the Earth's magnetic field over a period of two years the interaction of the solar wind with the upper atmospheric region will be investigated. Additional two-frequency GPS measurements allow to derive Total Electron Content (TEC). The TEC values will be correlated with the solar EUV/UV and solar wind inputs to improve the correction algorithms for a broad range of applications in the fields of space communication and navigation.In the frame of the TIGER program the development of more accurate models of the thermosphere/ionosphere shall be supported by this proposed project. The scientific payload and its implications on the satellite system are described.
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