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- W4385301206 abstract "METRIC is a proposed mission that aims to improve the knowledge of atmospheric density, general relativity and geodesy. The mission foresees a small spherical satellite placed in a polar eccentric orbit, with the apogee at 1200 km of altitude and perigee at 400–450 km. The spacecraft will be tracked from ground and space and have an on-board 3-axis accelerometer. The accelerometer will measure non-gravitational accelerations (due mainly to neutral drag and solar radiation pressure). A dynamical simulator has been implemented with known models (e.g. higher-harmonics gravity field, upper atmosphere density, solar pressure) in order to estimate the non-gravitational accelerations acting on the satellite. These are then analyzed in order to extract their main characteristics: intensity and frequency spectrum. Consequently, an envelope for the accelerometer features - dynamic range, required accuracy and frequency bandwidth - can be set. The data collected by the accelerometer will be used, in combination with tracking data from GNSS and SLR, to improve the atmospheric density knowledge over a wide range of altitudes, to perform an accurate measurement of the orbital precessions predicted by general relativity and implement a space-based tie of geodetic reference frames." @default.
- W4385301206 created "2023-07-28" @default.
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- W4385301206 date "2023-06-19" @default.
- W4385301206 modified "2023-10-16" @default.
- W4385301206 title "Determination of the accelerometer metrological characteristics on board the METRIC mission" @default.
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- W4385301206 doi "https://doi.org/10.1109/metroaerospace57412.2023.10190021" @default.
- W4385301206 hasPublicationYear "2023" @default.
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