Calibration of accelerometers aboard GRACE satellites by comparison with POD-based nongravitational accelerationsReport as inadecuate




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1 ASCR - Czech Academy of Sciences Prague

Abstract : The proposed calibration method uses the precise kinematic positions derived from the data of the GPS receivers aboard the twin GRACE satellites POD, Precise Orbit Determination. The total satellite accelerations are obtained numerically as a second derivative of the kinematic positions, from these the modelled forces of gravitational origin are subtracted. The resulting nongravitational accelerations then serve as a calibration standard for the uncalibrated accelerometer data. The calibration parameters for the GRACE accelerometers have already been published using other methods. The aim of our study was to obtain not only the calibrated accelerometer measurements, but also a statistically correct estimate of their uncertainty.

Keywords : Space accelerometers Nongravitational forces Generalized least squares Autoregressive processes





Author: Ales Bezdek -

Source: https://hal.archives-ouvertes.fr/



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