[IGSMAIL-2043] CODE Product Change
Markus
Markus
Fri Oct 16 08:58:28 PDT 1998
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IGS Electronic Mail Fri Oct 16 8:58:28 PDT 1998 Message Number 2043
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Author: Markus Rothacher
Subject: CODE Product Change
Dear Colleagues,
for the CODE product submission of GPS week 0978 a new normal equation
stacking program was used (written by Leos Mervart). Because of the new
possibilities of this program we are now delivering a very consistent set
of weekly products with the following characteristics:
1) The weekly SINEX file contains now site coordinates and ERPs (offset and
rate for each day with continuity at the day boundaries).
2) Minimum constraints (rotations) are used to create the weekly SINEX
solution.
3) All constraints applied (ERP continuity, rotations) are given in the
a priori covariance matrix block of the SINEX file..
4) All 3-day solutions are re-computed at the end of the week fixing the
site coordinates and ERPs to the weekly SINEX solution. The resulting
orbits and troposphere zenith delays are then fully consistent with the
weekly SINEX product.
5) The ERPs estimates are now daily values (and not 3-day values). Therefore,
PM and LOD will be somewhat noisier than before.
The combination centers --- GNAAC, GFZ (troposphere), NRC (orbits and ERPs) ---
should be aware of the fact that the source code writing the SINEX files
(for site coordinates and ERPs as well as for troposphere) has been rewritten.
Therefore, if you have any problems with or questions about the submission
of GPS week 0978, please let us know.
With best regards,
Markus Rothacher
Tim Springer
Leos Mervart
CODE Analysis Center
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Dr. Markus Rothacher Phone : ++41-31-631-8591
Astronomical Institute Fax : ++41-31-631-3869
University of Berne E-mail : markus.rothacher at aiub.unibe.ch
Sidlerstrasse 5 AFTP : ftp ubeclu.unibe.ch (130.92.6.18)
CH-3012 Berne cd aiub$ftp after login
Switzerland WWW : http://www.cx.unibe.ch/aiub/
[Mailed From: rothacher at ubeclu.unibe.ch (MARKUS ROTHACHER)]
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