[IGSMAIL-5263]: Station operators, please check that all data is at DCs

[Angelyn W. Moore]

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IGS Electronic Mail      28 Nov 17:19:35 PST 2005      Message Number 5263
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Authors: Angelyn Moore and Carey Noll

Dear IGS colleagues, and station operators in particular:

The IGS will begin a large reprocessing effort soon.  Analysis Centers will be
re-analyzing the complete historical IGS data set, applying modern methods to
yield more consistent results.

As such, the ACs will be looking for the complete set of historical data from 
many sites, and ask that you check to make sure all the historical data of sites
you manage is available at the IGS Data Centers.  There is special interest in
data from early in a station's history, even before a station became an IGS
station (as long as it was operated stably), so please pay attention to whether
you have data from earlier than appears in IGS archives.  The deadline for this
effort is March 2006.

We have put together a few summaries that will help make this easier.

1. The GSAC (http://gsac.ucsd.edu) was used to make 1 report per site, including
former sites, showing what data was found at all the participating DCs.  There
is one line per year and the days which have data are listed.
http://igscb.jpl.nasa.gov/igscb/station/general/historicaldata
These go back to 1990 for interest, but 1994 and forward is the period of most 
importance.

2. CDDIS shows what days of data it is missing for each site, under
ftp://cddis.gsfc.nasa.gov/pub/reports/gps/daily/missing
There are also yearly summaries going back to the early 1990's at
ftp://cddis.gsfc.nasa.gov/pub/reports/gps/daily/

3. You can use the search by site feature at
http://sopac.ucsd.edu/cgi-bin/dbDataBySite.cgi

4. Some European regional stations may not be in the GDCs, so you should also
check ftp://igs.ifag.de/IGS/reports/

Mirroring equalizes the DC holdings to a great degree, so checking that at least
one of these DCs has all of your data will help ensure that the reprocessing
effort will be able to find it.  If you have locally-archived data that is not
at one of these DCs, please make arrangements to have it uploaded. DC contacts
are available in http://igscb.jpl.nasa.gov/organization/centers.html

It is also important to replace any partial files at the DCs with full versions,
if available.  We are working on reporting partial files to you for easy
checking against your data holdings.  Please keep this in mind.

If we can be of any assistance, just let us know.

Best regards,
Angelyn Moore (Network Coordinator) and Carey Noll (Data Center WG Chair)