Dear Colleagues,

during the last weeks we have made first experiences downloading
contributions for the IERS Combination Pilot Project (CPP). The
archive currently comprises only "intra-technique" solutions
from the Technique Centers (IVS, IGS, IDS) or from specific
institutions (NCL: SLR, GPS - IGN/JPL: DORIS). Since the various
solutions are not only prepared for the IERS but also for the
technique services all file names are in accordance with the
naming conventions of the respective service. Thus, we have to
rename the downloaded files according to the CPP naming
conventions. This will be done automatically in the future.
Initially we planned to archive all files with all their past
versions. However, this is not being done for the original files,
e.g. at the CDDIS data center. Thus, we decided to re-initialize
the IERS data archive, i.e. we will only provide the latest
versions of the files but no past versions.
Now the file names will be fully consistent with the
CPP file naming conventions, where the "version indicator"
(i.e. "_XX" in "CCCYYDDDTN_XX.snx.Z") should be used only for
alternative solutions/files but not for new versions of an
old file.

In summary we propose the following steps:

1. Re-initialization of the IERS data archive with respect to
   the files of the CPP (older version of the same file won't
   be archived any longer).
2. Preparing a Web-page explaining the schemes used to rename
   the original files with respect to the CPP naming conventions
   and showing the original location (i.e. ftp-archive) of
   the files.
3. Preparing a Web-page showing the newest files with respect to
   the CPP in the IERS data archive; this page will be
   dynamically build each time it is called.
4. Preparing a Web-page containing all e-mails from the CPP
   e-mail exploder.

Please let us know, whether there are any suggestions or
objectives with respect to these steps. Otherwise we will move to
the new processing scheme on Friday, 23 July. At that time
all file downloads and the renaming of the files will be done
automatically.

All necessary information with respect to the above steps will
be sent through this e-mail exploder.

With best regards,

Wolfgang Schwegmann

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Wolfgang Schwegmann
IERS Central Bureau

Bundesamt für Kartographie und Geodäsie
Federal Agency for Cartography and Geodesy
Richard-Strauss-Allee 11
D-60598 Frankfurt am Main
Internet: http://www.iers.org

Tel: # 49-69-6333-314
Fax: # 49-69-6333-425
Email: schwegmann@iers.org