| Date: | 2024-06-14 16:35:25 | |
| Sender: | ”Lemoine, Frank G. (GSFC-61A0)” <frank.g.lemoine@nasa.gov> | |
| Subject: | [SLR-Mail] No.2845: Update of Center-of-Mass (CoM) Information for Larets on the ILRS website | |
| Author: | F.G. Lemoine | |
| Content: | Author: F.G. Lemoine Dear Colleagues: This email is to inform you that we have updated the Center-of-Mass (CoM, Array offset) information on the ILRS website (https://ilrs.gsfc.nasa.gov) for Larets. The objective of this email is to make sure you are aware of the latest work, and ask the community of SLR data users to use the latest information when processing SLR data to Larets. We are aware that some analysts are not necessarily using the most up-to-date values for the Larets CoM. The key point is that for some time different ILRS analysts have noted and documented that the a priori (nominal) CoM of 56.2 mm produces a mean bias in the SLR residuals to Larets. Presently, based on the work of Sosnica et al. (2015, J. Geodesy, doi: 10.1007/s00190-015-0825-1) and other work by John Ries (Center for Space Research, The University of Texas at Austin) and Mathis Blofeld (DGFI-TUM, Munich, Germany) the ILRS recommends using larger values of 63.1 mm or 62.5 mm as the Larets CoM correction. Please see the website and the references cited therein for more information. URL: https://ilrs.gsfc.nasa.gov/missions/satellite_missions/current_missions/lare_com.html If you have any questions please do not hesitate to contact the ILRS Central Bureau. Sincerely, Frank G. Lemoine on behalf of the ILRS Central Bureau ----------------------------------------- Geodesy & Geophysics Laboratory NASA Goddard Space Flight Center |