Effect of the improved accelerometer calibration method on AIUB's GRACE monthly gravity field solution

Jean, Yoomin; Meyer, Ulrich; Jäggi, Adrian (2017). Effect of the improved accelerometer calibration method on AIUB's GRACE monthly gravity field solution (Unpublished). In: EGU General Assembly 2017. Vienna, Austria. April 23-28, 2017.

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The monthly global gravity field solutions derived using the measurements from the GRACE (Gravity Recovery and Climate Experiment) satellites have been continuously improved by the processing centers. One of the improvements in the processing method is a more detailed calibration of the on-board accelerometers in the GRACE satellites. The accelerometer data calibration is usually restricted to the scale factors and biases. It has been assumed that the three different axes are perfectly orthogonal in the GRACE science reference frame. Recently, it was shown by Klinger and Mayer-Gürr (2016) that a fully-populated scale matrix considering the non-orthogonality of the axes and the misalignment of the GRACE science reference frame and the GRACE accelerometer frame improves the quality of the C20 coefficient in the GRACE monthly gravity field solutions. We investigate the effect of the more detailed calibration of the GRACE accelerometer data on the C20 coefficient in the case of the AIUB (Astronomical Institute of the University of Bern) processing method using the Celestial Mechanics Approach. We also investigate the effect of the new calibration parameters on the stochastic parameters in the Celestial Mechanics Approach.

Item Type:

Conference or Workshop Item (Speech)

Division/Institute:

08 Faculty of Science > Institute of Astronomy

UniBE Contributor:

Jean, Yoomin; Meyer, Ulrich and Jäggi, Adrian

Subjects:

500 Science > 520 Astronomy

Language:

English

Submitter:

Pierre Fridez

Date Deposited:

12 Oct 2017 16:26

Last Modified:

12 Oct 2017 16:26

Additional Information:

Presentation

BORIS DOI:

10.7892/boris.99673

URI:

https://boris.unibe.ch/id/eprint/99673

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