RL05 monthly and 10-day gravity field solutions from CNES/GRGS

In February 2020 CNES/GRGS published its 5th reprocessing (called "RL05") of the GRACE data, from August 2002 to August 2016. The extension of this series covering the span of the GRACE-FO data, 2018-now, will be released in October. This new times series comes, as for the previous releases, in a monthly and a 10-day time resolution. 

The main differences of the new release with respect to the previous one are :
- the use of the most recent version of the JPL KBR data (version 3),
- the use of the IGS orbits and clocks in replacement of the GRGS ones,
- a completely homogenous processing over the full time span,
- the use of AOD1B-RL06 for the dealiasing data in replacement of the ERA-Interim+TUGO products.

For the processing of the GRACE-FO data we have used the TUGRAZ transplant accelerometer data instead of the JPL one, resulting in a great stabilization of the accelerometer scale factors, now close to 1 over the full time span, in a reduction of the range-rate and GPS residuals and in an improvement of the gravity field solutions.

This presentation will focus on the processing details and on the comparison of this new series with the Release 06 from JPL / GFZ / CSR, the ITSG-Grace2018 time series from TUGRAZ, and the combined time series from the new international combination service COST-G.