GSTM2020-15
https://doi.org/10.5194/gstm2020-15
GRACE/GRACE-FO Science Team Meeting 2020
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Two-step LRI1B data calibration approach

Saniya Behzadpour, Andreas Kvas, and Torsten Mayer-Gürr
Saniya Behzadpour et al.
  • Institute of Geodesy, Graz University of Technology, Graz, Austria (behzadpour@tugraz.at)

GRACE-FO carries a Laser Ranging Interferometer (LRI) as a technology demonstration to provide measurements of inter-satellite range changes. This additional measurement technology provides supplementary observations, which improve the reliability of the range rate measurements and allow for a cross-instrument diagnostics and calibration with the K-band ranging (KBR) system.

We present a two-step approach used for LRI1B data calibration within the ITSG-Grace2018 scheme, which is compatible with the entire v04 release timespan. The aim of this study is to mitigate the remaining systematics due to the LRI datation time offset and LRI scale factor. We discuss the implementation of calibration parameters and the contribution of the calibration approach to the overall accuracy of gravity field solutions.

How to cite: Behzadpour, S., Kvas, A., and Mayer-Gürr, T.: Two-step LRI1B data calibration approach, GRACE/GRACE-FO Science Team Meeting 2020, online, 27–29 Oct 2020, GSTM2020-15, https://doi.org/10.5194/gstm2020-15, 2020.