[IGSMAIL-4096]: ITRF 1997 and 2000 SOPAC Reruns (updated)

[Michael Scharber]

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IGS Electronic Mail      01 Oct 09:53:31 PDT 2002      Message Number 4096
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Author : SOPAC Analysis Staff

SOPAC has finished the bulk of it's work regarding the update of its GPS 
satellite orbit files and associated products with a new set recently 
computed in the ITRF2000 reference frame.

The files that have been updated @ SOPAC include:

- all files in ftp://garner.ucsd.edu/pub/combinations/ 
   (weekly orbits, repeatabilities, positions, sinex files,
   analysis summary files, earth orientation files, etc.)
- all gpgga?.???.Z and sio* files located in 
  ftp://garner.ucsd.edu/pub/products/
- all gpgga?.???.Z files located in
  ftp://garner.ucsd.edu/pub/gfiles/


All of the above-mentioned files (from GPS week 0576 to the present) 
should now be in a uniform ITRF2000 reference frame.

Orbit/analysis files produced by analysis centers other than SIO
which are archived here at SOPAC have NOT been affected by this update.

Also, please take note that during the process of updating our orbits and 
associated products with ITRF2000 versions, we have found anomalous
results with orbits for the following days:

day 262 of 1998
day 100 of 1999
day 247 of 1999
day 303 of 1999
day 239 of 2000
day 071 of 2000
day 266 of 2001
day 280 of 2001

We are continuing with the process of fixing these problems and will 
continue to post updates as those problems are solved.

Best Regards,

SOPAC Analysis Staff