Dear colleagues,

We have the pleasure to inform you on the availability of an updated v= ersion of our mean Time-Variable-Gravity field model CNES_GRGS.RL05MF= . Compared to the previous version, it includes 17 additional monthly GRACE= -FO solutions.

This updated model is available in two formats: “.shc” (GR= ACE-type format) and “.gfc2” (ICGEM-type format) from the follo= wing addresses:

https://api.sedoo.f= r/formater-catalogue-prod/grace/direct/CNES_GRGS.RL05MF_u202601.shc

https://api.sedoo.= fr/formater-catalogue-prod/grace/direct/CNES_GRGS.RL05MF_u202601.gfc2

A short description of this updated version of CNES_GRGS.RL05MF is giv= en below and at the address https= ://grace.obs-mip.fr/variable-models-grace-lageos/mean-fields/release-05/ :

2026/06/01: Update of the previous mean field = CNES_GRGS.RL05MF_2024_08 by incorporating 17 additional month= ly GRACE-FO solutions from CNES RL05 (September 2024 to January 2026). Thes= e monthly GRACE-FO solutions include SLR data from 6 satellites: Lageos1, Lageos2, Starlette, Stella, Ajisai and= Lares.

The nomenclature of this new mean model has been slightly modified:= "u" stands for "updated" and is followed by the last m= onth of GRACE-FO data included in the mean field (January 2026).

This new model, CNES_GRGS.RL05MF_u202601, is s= trictly identical to the previous one, CNES_GRGS.RL05MF_2024_08, until Jan 1st, 2021. From that date, it will differ slightly and= progressively from the previous one due to the new adjustment based on a longer time span of GRACE-FO month= ly solutions.

We have recently published a paper in the Journal of Geodesy describin= g the computation standards of our 10-day and monthly RL05 gravity solution= s:

Lemoine J-M, Bourgogne S, G=E9gout P, et al (2026) 22 years of= time-variable gravity field determination from GRACE and GRACE Follow-On: = the CNES/GRGS RL05 solution. Journal of Geodesy 100:20. = https://doi.org/10.1007/s00190-026-02040-1

Sincerely,

Jean-Michel, Pascal G=E9gout, Alexandre Couhert, Fabien Gachet

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Jean-Michel LEMOINE

Ing=E9nieur

DTN/CD/GS
BPI 3100

18 avenue Edouard Belin 31401 Toulouse Cedex 9

= +33 (0)5 61 33 28 94 / +33 (0)6 03 00 21 63

= jean-michel.lemoine@cnes.fr

= cnes.fr get.omp.eu
Lab : UMR5563 (G=E9osciences Environnement Toulouse)

=

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