The Twelfth Marcel Grossmann Meeting - On Recent Developments in Theoretical and Experimental General Relativity Astrophysics and Relativistic Field Theories - Proceedings of the MG12 Meeting on General Relativity, 2012
The French space mission MICROSCOPE aims at testing the Equivalence Principle (EP) up to an accur... more The French space mission MICROSCOPE aims at testing the Equivalence Principle (EP) up to an accuracy of 10-15 . The experiment will be carried out on a satellite which is developed and produced within the CNES Myriade series. The measuring accuracy will be achieved by means of two high-precision capacitive differential accelerometers, that are built by the French institute ONERA. Currently, the HPS (High Performance satellite dynamics Simulator), a tool to support mission modeling, is adapted to the MICROSCOPE mission for the simulation of test mass and satellite dynamics. This tool is developed in cooperation with the DLR Institute of Space Systems. It includes possibilities for modeling environmental disturbances like solar radiation pressure as well as mission specific design aspects (e.g. geometry, number of accelerometers). At ZARM, which is member of the MICROSCOPE performance team, the upcoming data evaluation process is prepared using the HPS. Therefore a comprehensive simul...
ABSTRACT The ZARM Drag-Free-Simulator is being developed as a tool for comprehensive mission mode... more ABSTRACT The ZARM Drag-Free-Simulator is being developed as a tool for comprehensive mission modeling. Environmental disturbances like solar radiation pressure, atmospheric drag, interactions between the satellite and the Earth's magnetic field can be taken into account via several models. Besides the gravitational field of the Earth, the influence of Sun, Moon and the planets including Pluto can be considered for aimed simulations, too. Methods of modeling and implementation will be presented. At the moment, effort is made to adapt this simulation tool for the french mission MICRO- SCOPE which is designed for testing the equivalence principle up to an accuracy of eta=10-15 . Additionally, detailed modeling of on-board capacitive sensors is necessary for a better understanding of the real system. The actual status of mission modeling will be reported.
In its orbit the satellite's motion is affected by several environmental disturbances. One of the... more In its orbit the satellite's motion is affected by several environmental disturbances. One of these disturbing effects is the solar radiation pressure, which can be modeled adequately by assuming that incident radiation is absorbed, reflected specularly or/and reflected diffuse. At the German institute ZARM (Center of Applied Space Technology and Microgravity) an al-gorithm for the determination of resulting disturbance forces and torques due to solar radiation pressure has been developed. The source code has been tested and compared with analytically obtained values, results will be presented. Since the solar radiation pressure will be considered in the disturbance analysis of the small satellite mission MICROSCOPE, an accurate modelling of the resulting effects is necessary. Thus the algorithm has to be considered for the end-to-end simulation of this mission anyway. For these purposes a finite element model (FEM) of the MICROSCOPE satellite's surfaces structure is built, geometry and surface properties are taken from this model. First results of this study will be reported.
The Twelfth Marcel Grossmann Meeting - On Recent Developments in Theoretical and Experimental General Relativity Astrophysics and Relativistic Field Theories - Proceedings of the MG12 Meeting on General Relativity, 2012
The French space mission MICROSCOPE aims at testing the Equivalence Principle (EP) up to an accur... more The French space mission MICROSCOPE aims at testing the Equivalence Principle (EP) up to an accuracy of 10-15 . The experiment will be carried out on a satellite which is developed and produced within the CNES Myriade series. The measuring accuracy will be achieved by means of two high-precision capacitive differential accelerometers, that are built by the French institute ONERA. Currently, the HPS (High Performance satellite dynamics Simulator), a tool to support mission modeling, is adapted to the MICROSCOPE mission for the simulation of test mass and satellite dynamics. This tool is developed in cooperation with the DLR Institute of Space Systems. It includes possibilities for modeling environmental disturbances like solar radiation pressure as well as mission specific design aspects (e.g. geometry, number of accelerometers). At ZARM, which is member of the MICROSCOPE performance team, the upcoming data evaluation process is prepared using the HPS. Therefore a comprehensive simul...
ABSTRACT The ZARM Drag-Free-Simulator is being developed as a tool for comprehensive mission mode... more ABSTRACT The ZARM Drag-Free-Simulator is being developed as a tool for comprehensive mission modeling. Environmental disturbances like solar radiation pressure, atmospheric drag, interactions between the satellite and the Earth's magnetic field can be taken into account via several models. Besides the gravitational field of the Earth, the influence of Sun, Moon and the planets including Pluto can be considered for aimed simulations, too. Methods of modeling and implementation will be presented. At the moment, effort is made to adapt this simulation tool for the french mission MICRO- SCOPE which is designed for testing the equivalence principle up to an accuracy of eta=10-15 . Additionally, detailed modeling of on-board capacitive sensors is necessary for a better understanding of the real system. The actual status of mission modeling will be reported.
In its orbit the satellite's motion is affected by several environmental disturbances. One of the... more In its orbit the satellite's motion is affected by several environmental disturbances. One of these disturbing effects is the solar radiation pressure, which can be modeled adequately by assuming that incident radiation is absorbed, reflected specularly or/and reflected diffuse. At the German institute ZARM (Center of Applied Space Technology and Microgravity) an al-gorithm for the determination of resulting disturbance forces and torques due to solar radiation pressure has been developed. The source code has been tested and compared with analytically obtained values, results will be presented. Since the solar radiation pressure will be considered in the disturbance analysis of the small satellite mission MICROSCOPE, an accurate modelling of the resulting effects is necessary. Thus the algorithm has to be considered for the end-to-end simulation of this mission anyway. For these purposes a finite element model (FEM) of the MICROSCOPE satellite's surfaces structure is built, geometry and surface properties are taken from this model. First results of this study will be reported.
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