******************************************************************************
dorismail               19-May-2025 10:15:33 Message No 1439
******************************************************************************


Author: Moreaux Guilhem <gmoreaux@groupcls.com>
Subject: IDS CC - DPOD2020 version 4.0




Dear IDS users,

The 4.0 version of the DPOD2020 (DORIS extension of ITRF2020 for Precise Or=
bit Determination may be soon available for download from the CDDIS and fro=
m IGN.
That version is deduced on the position and velocity cumulative solution ba=
sed on the latest IDS weekly combined solutions from 1993.0 to 2025.0. Note=
 that the version 4.0 is aligned onto the ITRF2020-u2023 solution.

The new solution is available in both SINEX and text format from either the=
 main DPOD directory (dpod2020_current.snx.Z or dpod2020_current.txt.Z) or =
the DPOD2020 subdirectory (dpod2020_040.snx.Z or dpod2020_040.txt.Z).
I remind you that since version 2.0, the DPOD2020 solutions include both se=
asonal (annual and semi-annual) and post-seismic deformation corrections. T=
hus, for that 4.0 version, the seasonal and PSD corrections are given by, r=
espectively, dpod2020_040_freq_corr.txt.Z (dpod2020_current_freq_corr.txt.Z=
) and dpod2020_040_psd_corr.txt.Z (dpod2020_current_psd_corr.txt.Z) files.

To help the users to easily identify the DORIS stations which were operatio=
nal at the date of the release of the DPOD2020 version 4.0, the end dates o=
f these stations in the SOLUTION/EPOCHS of the SINEX file are set to 49:365=
:86399.
Note a slight change in the format of the DORIS PSD correction file due to =
no more distinction between PSD corrections for use with or without seasona=
l terms.

If you have any question and/or remark, please.

Best regards.
Guilhem