[IGSREPORT-11532] Wk 1278 MIT T2 Analysis Report

Tom Herring tah at mtglas2.mit.edu
Wed Jul 21 23:06:36 PDT 2004


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IGS Electronic Report   21 Jul 22:59:48 PDT 2004      Message Number 11532
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Author: Thomas Herring

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MIT ANALYSIS REPORT GPS-WEEK 1278    Dates: 04jul04  to  04jul10 
********************************************************************************

MIT (Massachusetts Institute of Technology) 
Room 54-618
77 Massachusetts Avenue, 
Cambridge,  MA  02139
e-mail: tah at mit.edu 
tel:    (617)253-5941 (Tom Herring)
fax:    (617)253-1699

PRODUCTS GENERATED:
The following products are generated and uploaded into CDDIS @ NASA/GSFC
   MIT1278g.SNX   Combined sinex file from all available analysis centers
   MIT1278g.SUM   Name of this summary file
   MIT1278g.RES   File of the individual AC position estimates residuals 
                  to the combined solution for the week. 
		  
0.0 Starting Week 1244 we adopted the 99 IGS reference sites in 
    IGS03P33_RS99.snx.  System denoted as IGb00.
0.1 Starting Week 1203 we changed the method used to compute the variance 
    scaling for each sinex file.  The old method is described in item 2 of
    the analysis procedures below.  In the new method, we determine the scaling
    factor by the ratio of the adjustments to the IGS00 frame from a loose,
    rotated and translated solution, to the sigmas determined for the adjustment.
    The new method is robust when some of the reference sites have changed 
    position (because of outlier detection during the rotation/translation
    step) and is not senstive to any aproiri rescaling factors used in the
    analysis. 
0.2 Starting Week 1202 adopted IGS01P37_RS54 for reference frame.  Dropped
    KOKB and FAIR from frame definition.	  
0.3 Starting Week 1125, we removed AREQ from the sites used in determining
    the variance re-scaling of the center SINEX files.  This site
    appears to have moved by 0.5 meters at around week 1120.
0.4 Starting Week 1110, we stopped applied a pole-tide correction to
    SIO sinex files because this correction is already made in their
    analysis.
0.5 Starting Week 1066, we adopted the IGS realization of the ITRF97
    (referred to as IGS97).  We also replaced our constrained solution
    a loose solution with translation (+-1 mm) and orientation (+-0.1 mas)
    constraints applied.
0.6 Starting Week 1020, we adopted the ITRF97 reference frame
0.7 Starting Week 1002, we re-ordered the summary to give the residual
    summary and the SINEX file errors first.  

                         All Sites                       | Sites common between Centers
 CENTER   #       North           East           Up      | NC       North           East           Up
               RMS    Chi     RMS    Chi    RMS     Chi  |       RMS    Chi     RMS    Chi    RMS     Chi
               (mm)           (mm)          (mm)         |       (mm)           (mm)          (mm)
 COD      0    0.0    0.0     0.0    0.0     0.0    0.0  |  0    0.0    0.0     0.0    0.0     0.0    0.0 
 JPL      0    0.0    0.0     0.0    0.0     0.0    0.0  |  0    0.0    0.0     0.0    0.0     0.0    0.0 
 SIO    176    1.0    0.4     1.5    0.5     3.4    0.4  |  0    0.0    0.0     0.0    0.0     0.0    0.0 
 GFZ    175    1.2    0.4     1.2    0.4     5.1    0.4  |  0    0.0    0.0     0.0    0.0     0.0    0.0 
 MIT      0    0.0    0.0     0.0    0.0     0.0    0.0  |  0    0.0    0.0     0.0    0.0     0.0    0.0 
 EMR      0    0.0    0.0     0.0    0.0     0.0    0.0  |  0    0.0    0.0     0.0    0.0     0.0    0.0 
 ESA      0    0.0    0.0     0.0    0.0     0.0    0.0  |  0    0.0    0.0     0.0    0.0     0.0    0.0 
 NGS      0    0.0    0.0     0.0    0.0     0.0    0.0  |  0    0.0    0.0     0.0    0.0     0.0    0.0 
 
CENTER SINEX ERRORS: (corrected during processing).
 CNT  Site Type of Error           Used values                       IGS.SNX values
 COM  WUHN Eccentricity: Used        -0.0094 -0.0022  2.3610 Real  0.0000  0.0000  2.3610  m
 SIO  PDEL Used LEIAT504         dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  PDEL Real LEIAT504         dL1  0.0003 -0.0003  0.1093  dL2  0.0011  0.0011  0.1282  m
 SIO  CHPI Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  CHPI Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  QAQ1 Used ASH701945E_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  QAQ1 Real ASH701945E_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  KELY Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  KELY Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  KOUR Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  KOUR Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  ALRT Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  ALRT Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  THU2 Used ASH701073.1      dL1  0.0014 -0.0010  0.1089  dL2  0.0010  0.0005  0.1274  m
 SIO  THU2 Real ASH701073.1      dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  THU3 Used ASH701073.1      dL1  0.0014 -0.0010  0.1089  dL2  0.0010  0.0005  0.1274  m
 SIO  THU3 Real ASH701073.1      dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  HOLM Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  HOLM Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  SACH Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  SACH Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  INVK Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  INVK Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  THTI Used ASH701945E_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  THTI Real ASH701945E_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  ASPA Used TRM33429.20+GP   dL1  0.0006 -0.0014  0.0739  dL2  0.0010 -0.0011  0.0767  m
 SIO  ASPA Real TRM33429.20+GP   dL1 -0.0004 -0.0010  0.0729  dL2 -0.0004 -0.0013  0.0750  m
 SIO  CHAT Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  CHAT Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  AUCK Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  AUCK Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  MOBS Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  MOBS Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  JAB1 Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  JAB1 Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  DARW Eccentricity: Used         0.0000  0.0000  0.0035 Real  0.0000  0.0000  0.0025  m
 SIO  TWTF Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  TWTF Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  PIMO Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  PIMO Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  TCMS Used LEIAT504         dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  TCMS Real LEIAT504         dL1  0.0003 -0.0003  0.1093  dL2  0.0011  0.0011  0.1282  m
 SIO  NNOR Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  NNOR Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  PERT Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  PERT Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  WUHN Eccentricity: Used        -0.0094 -0.0022  2.3610 Real  0.0000  0.0000  2.3610  m
 SIO  POL2 Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  POL2 Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  DGAR Used ASH701945E_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  DGAR Real ASH701945E_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  SEY1 Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  SEY1 Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  MOBN Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  MOBN Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  MBAR Eccentricity: Used         0.0000  0.0000  0.0153 Real  0.0000  0.0000  0.0083  m
 SIO  KIRU Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  KIRU Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  SUTH Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  SUTH Real ASH701945G_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  TRO1 Used ASH701073.1      dL1  0.0014 -0.0010  0.1089  dL2  0.0010  0.0005  0.1274  m
 SIO  TRO1 Real ASH701073.1      dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  GRAZ Used ASH701945C_M     dL1  0.0005  0.0003  0.1090  dL2  0.0003  0.0012  0.1279  m
 SIO  GRAZ Real ASH701945C_M     dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  NYA1 Used ASH701073.1      dL1  0.0014 -0.0010  0.1089  dL2  0.0010  0.0005  0.1274  m
 SIO  NYA1 Real ASH701073.1      dL1  0.0000  0.0000  0.1100  dL2  0.0000  0.0000  0.1280  m
 SIO  NYAL Eccentricity: Used         0.0040 -0.0010  5.2160 Real  0.0000  0.0000  5.2160  m

HISTORY and PROCEDURES
----------------------

0.0 Starting Week 998 we adopted full checking of the center sinex
    headers and we correct the solutions for differences between the
    headers and a modified version of IGS.SNX.  (The modifications are
    to put full precision antenna L1/L2 offsets and to correct the WUHN
    entry.  The station log for this site shows height to BCR not ARP).
    A new error reporting block has been added below.  We also have 
    removed some of the routine documention in this summary.

0.1 Starting week 993 we started to add corrections for the pole-tide to
    the SIO, NGS, and ESA sinex.  According to the analysis descriptions
    none of these centers apply the pole tide correction.  Starting with
    the re-submission of week 992, we corrected the LOD values in JPL sinex
    files from regularized LOD (should be called LODR in the SINEX file)
    to standard LOD.  (Since starting multiday polar motion combinations
    we have been correcting the sign error in the JPL LOD values.

0.2 Starting week 989 we include as Section 5.0 of this summary, the
    Earth rotation parameter estimates from the constrained combination
    solution in the IERS format.

0.3 Starting Week 980 we include multiday polar motion/UT1 estimates into
    our analysis.   We also no longer need to deconstrain the AC sinex 
    files although to add back into the covariance matrices at rotational
    uncertainity which is coupled between station positions and EOPs.


0.4 Starting Week 0943 we base the analysis on the ITRF96 system and the
    reference site list for the ITRF96 system. The increase in the number
    of sites used to obtain analysis variances increases the variance 
    factors for all centers by factors between 2 and 4.  The Chi**2 for
    the center residuals is now much closer to 1.0

0.5 Starting Week 0931 we added a new residual file to our submissions.  
    A description of the contents of the file is given in the file itself.
    We also changed the treatment of the translation of the individual 
    AC solutions.  The generation of the weighting factors and the constrained
    combined solution remains unchanged.  However, in the unconstrained 
    analyses (used for AC comparisons) we now allow explicit translation
    and scale parameters in the solution.  The net effect is to generate
    more realisitic sigmas for the center of mass position estimates and to
    make the coordinate estimates immune to real center of mass translations
    and scale changes. 

0.6 Starting Week 0901 we started using a new apriori file not Non-ITRF94 coordinates
    based on the analysis of week 0822-0900 sinex files.

1.0 Analysis Procedures:

(1) Each centers sinex solutions are de-constrained by adding back
 in a rotational uncertainty.
 
(2) Covariance matrices are re-scaled by computing the chi**2/freedom of
 the position residuals to the reference sites in IGS00 from an loosely
 constrained solution that is rotated and translated on to the IGS00 system.
 During the rotation/translation step, outliers (4-sigma based on fit) are
 removed and this new scheme is more robust when some of the reference sites 
 have moved (due earthquakes and/or equipment changes).
 
(2o) This procedure was replaced Week 1203 with the one described above.
 Covariance matrices from each center are re-scaled to generate
 unit increment in chi square per degree in the tight constraints solution.
 The values are are based in the chi**2 per degree of freedom increment
 when the loosely constrained solution is constrained to the ITRF1996
 coordinates of the 55 Reference sites.  Orientation changes are estimated
 in this step, but translations and scale are NOT estimated.
 
(3) The tight solution is generated with the following constraints on
 the core sites.  Starting Week 0858, ITRF94 is used for the coordinate
 system.  Starting Week 0878, we changed the site selection here to use
 WTZR and GOL2.  Starting Week 0897 we stopped using MADR as a core site.
 We continue not use MADR in the reference site list.

 Earth rotation parameters are estimated for each center (even when not given
 in the original SINEX files.  In this case the partial derivatives are
 computed from the station coordinates).

(4) When the combined and center solutions are compared to ITRF97, the
heights are given a variance 10 times larger than the horizontal coordinates.
The same variance ratio is used when the RMS to ITRF97 core sites is
computed.

(5) Starting Week 0826, we show the differences in the coordinates for
five non-core sites, in remote areas.  Four of these sites are processed 
by all centers.  These sites are not used in the RMS calculations or 
the transformation estimation to the 13 core sites.  The change in procedure
was because FORT is no longer being processed by all centers.  AREQ has
been added to the list for this reason.  After Week 0943, when the reference
site list increased we no long summarize additional sites.

(6) Starting Week 0826, we start to show a comparison of each centers
results with the combined solution for the week.  When the constraints
are applied to loose combined solution to translate, rotate and scale it
to the ITRF97, the constraints are actually applied using the full 
covariance matrix of the combined solution (rather than simply directly
applying the transformations to the coordinates).  The approach we use
constrains the center of mass to have zero variance relative to ITRF97.
The result of this is that the combined solution has the same center
of mass position and scale as ITRF97, and therefore when each of the
centers are compared to the combined solution, they generate very similar
translations and scales as they do the ITRF97.  Had we simply applied
the transformations to the coordinates, the translations and scale would
have been the difference between the combined translations and scale and
the individual center's translations and scale.
This new section is numbered 4.0.

(7) Starting Week 868, we updated the coordinates of sites not included
in the ITRF94 coordinate files.  This introduces a discontinuity in the
the adjustments to some of the "isolated" sites shown below.

 
 2.0 COMBINED FIT TO IGb00 
 Transformation of loose solution COMBINED to IGb00
 -----------------------------------------------
 For   91 Sites, RMS after 7 parameter transformation   2.5 mm  COMBINED wrt IGb00 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -4.4    5.6     -3.6    5.5     -4.1   11.7  -2.293  0.142  COMBINED  CoM
RMS Fits of COMBINED to IGb00
WRMS NEU   2.95   2.53   8.45 mm, NRMS   1.60   1.23   1.40 Num  91 COMBINED IGb00
 
 Adjustments to core site positions for COMBINED
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VESL     3.9    2.4   -0.5    2.3    5.5    8.0  COMBINED wrt IGb00
 VILL    -0.4    1.3   -2.6    1.4    5.6    4.4  COMBINED wrt IGb00
 SFER     6.5    1.4   -8.9    1.6    6.3    4.4  COMBINED wrt IGb00
 ASC1    -0.9    1.8    2.4    2.7   14.7    6.9  COMBINED wrt IGb00
 HOFN    -0.2    1.5    2.4    1.4   11.1    4.5  COMBINED wrt IGb00
 MAS1    -1.1    1.2    0.3    1.8   -1.4    4.6  COMBINED wrt IGb00
 FORT    -3.8    2.0   -1.8    3.1    7.4    8.8  COMBINED wrt IGb00
 STJO     1.5    1.8   -1.6    2.0   -4.1    5.5  COMBINED wrt IGb00
 KOUR    -2.8    1.7   -0.5    3.0  -11.8    8.0  COMBINED wrt IGb00
 OHI2     6.8    2.8   -2.1    2.3    6.0    7.0  COMBINED wrt IGb00
 LPGS     0.5    3.2   -1.3    3.8  -18.1   12.5  COMBINED wrt IGb00
 CRO1    -2.0    2.5    1.8    4.3    9.4   13.7  COMBINED wrt IGb00
 UNSA    -0.5    2.5   -1.4    3.0   -7.1    9.0  COMBINED wrt IGb00
 SCH2    -5.9    1.7   -2.7    2.1   -2.4    5.2  COMBINED wrt IGb00
 RIOG     0.3    2.7    2.6    2.3    1.5    6.3  COMBINED wrt IGb00
 THU3    -2.0    1.5   -0.3    1.4   17.0    6.8  COMBINED wrt IGb00
 SANT    -1.4    2.9    1.2    2.8    5.3    8.3  COMBINED wrt IGb00
 WES2    -0.7    2.3   -1.5    2.7  -13.7    8.3  COMBINED wrt IGb00
 NRC1    -6.0    1.9    2.5    2.2   -3.7    6.6  COMBINED wrt IGb00
 GODE    -2.4    1.9   -3.0    2.7   -6.1    6.4  COMBINED wrt IGb00
 ALGO    -1.9    1.7   -1.1    1.6   -9.6    5.6  COMBINED wrt IGb00
 MANA     0.3    2.9    0.5    5.3   -4.6   12.6  COMBINED wrt IGb00
 NLIB    -0.1    2.1   -1.8    2.4   -8.0    7.5  COMBINED wrt IGb00
 DUBO    -3.8    2.0   -0.2    2.3   -0.2    5.8  COMBINED wrt IGb00
 FLIN    -2.9    2.1    1.3    2.2   -8.3    5.8  COMBINED wrt IGb00
 MDO1    -0.7    2.2   -1.3    2.5   -4.3    8.1  COMBINED wrt IGb00
 PIE1     1.2    2.8   -3.7    4.7   -4.8   12.9  COMBINED wrt IGb00
 YELL    -2.3    2.0    0.0    1.9    0.4    5.8  COMBINED wrt IGb00
 GOLD    -0.5    3.1    1.3    2.8    3.8   11.4  COMBINED wrt IGb00
 DRAO    -1.8    1.3    0.4    1.4  -13.3    3.5  COMBINED wrt IGb00
 THTI     2.8    1.9    2.8    2.8   -2.5    7.1  COMBINED wrt IGb00
 MKEA     1.8    2.0    0.3    3.2  -17.1    6.7  COMBINED wrt IGb00
 CHAT     3.7    1.8    2.4    1.9    4.3    5.3  COMBINED wrt IGb00
 AUCK     3.8    1.6    3.0    2.2   -4.0    4.8  COMBINED wrt IGb00
 MCM4     3.4    2.4    1.7    2.4    4.5    9.4  COMBINED wrt IGb00
 BILI    -0.3    1.6   -1.5    1.5    6.8    5.2  COMBINED wrt IGb00
 NOUM    -0.8    1.9    5.8    2.7  -11.0    7.4  COMBINED wrt IGb00
 MAC1     4.2    1.7    2.7    1.5   -9.5    4.6  COMBINED wrt IGb00
 PETP     0.5    2.3   -2.0    2.2   -7.3    6.4  COMBINED wrt IGb00
 MAG0    -1.2    2.3   -7.7    2.4    5.7    6.2  COMBINED wrt IGb00
 TIDB     0.1    2.1   -1.9    2.3   -9.6    6.8  COMBINED wrt IGb00
 HOB2     2.3    1.6    1.1    1.7  -12.4    4.9  COMBINED wrt IGb00
 TOW2     1.1    1.3    1.3    1.8    7.9    4.4  COMBINED wrt IGb00
 YSSK   -13.5    2.3   -0.3    2.2    3.8    6.8  COMBINED wrt IGb00
 TSKB    -3.6    1.5   -6.2    1.9   -0.4    4.5  COMBINED wrt IGb00
 ALIC     1.5    1.6    1.2    2.1   -8.8    6.4  COMBINED wrt IGb00
 CEDU     0.7    1.3   -0.3    1.6  -10.3    4.3  COMBINED wrt IGb00
 JAB1     5.8    1.9   -0.6    2.9  -16.9    7.7  COMBINED wrt IGb00
 DARW    -1.0    2.5    2.5    3.9  -24.0   15.1  COMBINED wrt IGb00
 YAKT    -0.6    2.4   -4.7    2.2  -10.8    7.0  COMBINED wrt IGb00
 TIXI     0.2    1.9   -2.1    1.9    2.2    6.4  COMBINED wrt IGb00
 KARR    -1.0    1.6   -2.2    2.5  -11.8    6.0  COMBINED wrt IGb00
 PERT    -5.2    1.6   -2.5    2.2  -18.2    5.6  COMBINED wrt IGb00
 CAS1     3.7    1.8   -0.8    1.8    7.5    5.2  COMBINED wrt IGb00
 IRKT     0.3    2.7    0.6    2.9   -8.8    8.2  COMBINED wrt IGb00
 NTUS     1.1    1.9    0.1    2.7   -0.8    7.7  COMBINED wrt IGb00
 COCO     0.5    1.8    0.5    2.7  -12.3    7.2  COMBINED wrt IGb00
 KSTU    -2.1    3.4    0.4    3.4    0.0   10.4  COMBINED wrt IGb00
 LHAS    -5.5    2.1    2.3    2.8   10.2    8.0  COMBINED wrt IGb00
 URUM    -1.6    2.1    1.7    2.2    3.3    6.4  COMBINED wrt IGb00
 DAV1     2.7    1.7   -1.8    1.8    2.2    4.5  COMBINED wrt IGb00
 IISC    -3.3    1.5    3.1    2.0   10.8    5.8  COMBINED wrt IGb00
 POL2     0.1    1.8   -1.4    2.6    1.8    5.2  COMBINED wrt IGb00
 DGAR    -4.2    1.5   -1.0    1.9   -8.3    5.3  COMBINED wrt IGb00
 KERG     2.6    1.5    0.3    2.0   -3.5    4.2  COMBINED wrt IGb00
 KIT3    -0.9    3.0    2.1    4.4   -0.2   11.0  COMBINED wrt IGb00
 MAW1     6.2    2.9   -1.5    3.4    7.6    7.2  COMBINED wrt IGb00
 ARTU    -1.1    2.2   -1.1    2.1    4.2    6.5  COMBINED wrt IGb00
 BAHR    -1.9    1.5    1.8    1.8   11.1    5.5  COMBINED wrt IGb00
 MALI    -2.8    3.6    7.0    4.9    1.4   16.1  COMBINED wrt IGb00
 TRAB     1.9    3.2   -1.2    2.6   -0.6   10.8  COMBINED wrt IGb00
 SYOG     2.5    2.9   -0.3    2.8   -8.2   10.0  COMBINED wrt IGb00
 NICO    -0.6    4.0   -0.8    3.4    7.1   15.7  COMBINED wrt IGb00
 GLSV     3.4    2.7    5.3    4.2    5.0    7.8  COMBINED wrt IGb00
 HRAO    -3.0    1.6    3.9    2.1   -2.5    5.0  COMBINED wrt IGb00
 JOZE     3.9    2.1   -4.0    1.9   11.3    6.8  COMBINED wrt IGb00
 LAMA     2.5    1.8    3.4    1.6   10.6    5.5  COMBINED wrt IGb00
 TRO1    -4.7    1.6    1.1    1.5   11.4    5.1  COMBINED wrt IGb00
 BOR1     0.7    1.7    0.7    1.6    7.8    5.4  COMBINED wrt IGb00
 MATE     0.5    1.4   -3.5    1.6    9.2    4.8  COMBINED wrt IGb00
 GRAZ     1.4    1.5    1.1    1.7    1.3    4.7  COMBINED wrt IGb00
 POTS    -0.1    1.4    2.5    1.3    7.8    4.2  COMBINED wrt IGb00
 WTZR     1.0    1.4    0.4    1.4    2.1    4.4  COMBINED wrt IGb00
 ONSA    -0.3    3.2    0.4    2.4   12.6   10.1  COMBINED wrt IGb00
 NYAL    -2.7    1.8   -2.2    1.8    8.3    7.0  COMBINED wrt IGb00
 NKLG    -3.4    2.2    2.8    3.4    2.2    8.9  COMBINED wrt IGb00
 ZIMM     1.0    1.7   -1.2    1.5   16.3    5.2  COMBINED wrt IGb00
 GRAS    -0.7    1.5    2.6    1.4   10.3    4.9  COMBINED wrt IGb00
 WSRT     0.7    1.4   -0.2    1.3    3.3    4.0  COMBINED wrt IGb00
 BRUS     2.9    1.8   -3.0    1.6    0.3    5.7  COMBINED wrt IGb00
 Reference sites NOT used 
 
 
 3.0 CENTER FITS TO IGb00
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 151.50
 
 Transformation of loose solution GFZ to IGb00
 -----------------------------------------------
 For   83 Sites, RMS after 7 parameter transformation   2.9 mm  GFZ wrt IGb00 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -1.0 3627.2     -1.0 3627.2      1.2 3627.2  -1.655  0.236  GFZ  CoM
RMS Fits of GFZ to IGb00
WRMS NEU   2.80   2.82  10.93 mm, NRMS   0.89   1.01   0.98 Num  83 GFZ IGb00
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VESL     4.4    3.3   -1.7    2.7   12.6   13.0  GFZ wrt IGb00
 VILL     0.1    2.1   -1.9    1.9    5.5    7.0  GFZ wrt IGb00
 SFER     6.5    3.4   -8.5    3.1    6.4   12.0  GFZ wrt IGb00
 ASC1    -2.7    2.8    1.7    3.4   12.2   11.1  GFZ wrt IGb00
 HOFN     0.3    2.1    2.2    1.6   10.3    6.7  GFZ wrt IGb00
 MAS1    -2.1    3.0    0.7    3.1    2.6   12.9  GFZ wrt IGb00
 FORT    -6.0    3.7   -3.7    4.4  -13.4   17.5  GFZ wrt IGb00
 STJO     1.2    3.6   -1.6    2.7   -9.9   11.1  GFZ wrt IGb00
 KOUR    -4.7    3.2   -2.5    4.2  -20.1   17.8  GFZ wrt IGb00
 OHI2     6.2    3.8   -1.7    2.7   10.3   12.1  GFZ wrt IGb00
 LPGS    -1.0    5.3   -1.9    4.8  -14.8   23.4  GFZ wrt IGb00
 CRO1    -3.6    5.6    0.5    7.1   -3.9   32.4  GFZ wrt IGb00
 UNSA    -2.0    3.4   -1.7    3.4   -2.0   13.2  GFZ wrt IGb00
 SCH2    -6.4    4.0   -1.4    3.2   -8.1   11.9  GFZ wrt IGb00
 RIOG    -0.4    3.8    3.4    2.7   12.2   10.3  GFZ wrt IGb00
 THU3    -1.0    1.7    0.2    1.5   14.8    7.6  GFZ wrt IGb00
 SANT    -2.8    3.4    2.1    3.1   11.5   11.4  GFZ wrt IGb00
 WES2    -0.6    4.1   -2.0    3.4  -21.3   15.6  GFZ wrt IGb00
 NRC1    -5.6    3.1    3.2    2.8  -12.6   11.1  GFZ wrt IGb00
 GODE    -3.0    4.6   -5.1    4.7  -15.8   17.3  GFZ wrt IGb00
 ALGO    -1.2    2.3   -1.1    1.9  -12.1    7.1  GFZ wrt IGb00
 MANA    -0.7    5.7    0.3    7.5  -14.4   24.4  GFZ wrt IGb00
 NLIB     0.5    3.8   -2.2    3.5  -13.5   14.0  GFZ wrt IGb00
 DUBO    -3.0    4.0   -0.1    3.1   -5.5   12.2  GFZ wrt IGb00
 FLIN    -1.4    4.7    1.4    3.6   -9.2   13.8  GFZ wrt IGb00
 MDO1     0.5    3.7   -2.6    3.7  -14.2   15.2  GFZ wrt IGb00
 YELL    -0.4    3.7   -0.9    2.6   -2.1   11.7  GFZ wrt IGb00
 GOLD     0.8    3.2   -0.5    2.9   -1.6   11.6  GFZ wrt IGb00
 DRAO     0.2    3.3   -1.6    2.6  -12.0   10.0  GFZ wrt IGb00
 THTI     2.0    2.6    3.0    3.2   -8.2    9.8  GFZ wrt IGb00
 MKEA     0.3    4.3   -1.0    4.8   12.2   17.7  GFZ wrt IGb00
 CHAT     2.4    2.3    2.8    2.1    4.0    7.1  GFZ wrt IGb00
 AUCK     0.8    3.3    5.1    3.1   -2.3   11.5  GFZ wrt IGb00
 MCM4     0.6    4.5    2.4    3.6    8.0   24.3  GFZ wrt IGb00
 BILI     0.8    2.1   -1.5    1.7   10.4    7.0  GFZ wrt IGb00
 NOUM    -2.1    3.0    5.8    3.2  -12.5   11.7  GFZ wrt IGb00
 MAC1     3.6    2.4    3.2    1.8  -14.9    6.5  GFZ wrt IGb00
 PETP     1.9    3.5   -1.7    2.6   -2.2   10.1  GFZ wrt IGb00
 MAG0     2.0    4.5   -6.5    3.3   12.9   13.7  GFZ wrt IGb00
 TIDB    -0.8    3.2   -3.1    2.9  -12.8   11.3  GFZ wrt IGb00
 HOB2     1.0    3.2    0.1    2.5  -18.2   10.1  GFZ wrt IGb00
 TOW2    -0.3    2.7   -0.0    2.8   -3.8   10.9  GFZ wrt IGb00
 YSSK   -11.9    3.4    0.3    2.5    7.2   10.0  GFZ wrt IGb00
 TSKB    -3.0    3.4   -4.5    3.0    0.8   12.1  GFZ wrt IGb00
 ALIC     1.1    3.7    1.3    3.7  -11.2   15.3  GFZ wrt IGb00
 CEDU     1.4    2.9   -0.8    2.7  -14.8   11.0  GFZ wrt IGb00
 YAKT    -0.3    3.7   -7.0    2.6   -3.6   11.1  GFZ wrt IGb00
 TIXI     2.1    3.0   -2.4    2.3    9.3   11.8  GFZ wrt IGb00
 KARR     0.5    3.8    0.6    4.0  -12.6   15.6  GFZ wrt IGb00
 PERT    -3.6    4.3    2.6    4.2  -17.0   16.9  GFZ wrt IGb00
 CAS1     2.5    3.2   -0.1    2.5    1.1   10.8  GFZ wrt IGb00
 IRKT     2.5    4.9    0.8    3.4   -0.5   15.5  GFZ wrt IGb00
 NTUS     2.4    2.6    1.2    3.1   -5.0   10.6  GFZ wrt IGb00
 COCO     2.0    2.6    2.2    3.1  -18.2   10.7  GFZ wrt IGb00
 KSTU    -2.1    6.2    0.7    4.2    6.5   19.8  GFZ wrt IGb00
 LHAS    -3.7    3.4    1.8    3.3   17.5   14.2  GFZ wrt IGb00
 URUM     0.1    3.2    0.6    2.5   13.6    9.8  GFZ wrt IGb00
 DAV1     0.6    3.1   -3.5    2.6   -3.6   11.1  GFZ wrt IGb00
 IISC    -2.3    1.9    2.9    2.2   10.7    7.4  GFZ wrt IGb00
 DGAR    -2.9    1.9   -1.2    2.2  -10.0    6.8  GFZ wrt IGb00
 KERG     1.1    3.9   -1.1    3.1  -15.9   12.0  GFZ wrt IGb00
 MAW1     7.8    5.5   -0.6    7.1    4.7   15.6  GFZ wrt IGb00
 ARTU     0.3    3.5   -1.0    2.6    8.6   10.9  GFZ wrt IGb00
 BAHR    -0.6    1.9    1.0    2.0   14.0    7.6  GFZ wrt IGb00
 MALI    -3.5    4.5    7.3    5.3    1.0   20.1  GFZ wrt IGb00
 TRAB     2.8    3.3   -1.6    2.7   -1.7   10.9  GFZ wrt IGb00
 SYOG     3.6    5.0   -2.5    3.7   -8.7   18.8  GFZ wrt IGb00
 NICO     0.5    4.0   -1.1    3.4    6.8   15.7  GFZ wrt IGb00
 HRAO    -4.9    5.1    5.6    5.8    7.1   21.9  GFZ wrt IGb00
 JOZE     8.4    4.4   -6.5    5.1   12.9   14.3  GFZ wrt IGb00
 TRO1    -3.8    3.1    8.9    2.3   16.1   11.6  GFZ wrt IGb00
 BOR1     0.7    4.4   -0.7    5.0    9.4   13.9  GFZ wrt IGb00
 MATE     1.7    3.2   -2.9    2.8   12.7   10.7  GFZ wrt IGb00
 POTS     0.3    3.1    2.7    2.4    6.4    9.5  GFZ wrt IGb00
 WTZR     1.6    3.1    0.7    2.5    4.2    9.4  GFZ wrt IGb00
 ONSA     0.2    3.2    1.1    2.5   11.4   10.2  GFZ wrt IGb00
 NYAL    -1.9    2.7   -1.8    2.3   15.8   14.1  GFZ wrt IGb00
 NKLG    -4.3    3.3    3.7    4.0   -5.3   14.6  GFZ wrt IGb00
 ZIMM     0.6    3.4   -2.0    2.8   21.8   10.3  GFZ wrt IGb00
 GRAS    -0.4    3.3    3.2    2.8   14.1   10.6  GFZ wrt IGb00
 WSRT     1.1    3.4    1.1    2.7    3.7   10.5  GFZ wrt IGb00
 BRUS     2.9    3.6   -3.3    2.9    0.3   12.0  GFZ wrt IGb00
 Reference sites NOT used 
 GLSV     3.0   14.1    1.5   23.9   11.6   27.1  GFZ wrt IGb00
 GRAZ     4.7   25.1    1.8   41.4    1.7   57.1  GFZ wrt IGb00
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 6.02
 
 Transformation of loose solution SIO to IGb00
 -----------------------------------------------
 For   88 Sites, RMS after 7 parameter transformation   2.8 mm  SIO wrt IGb00 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -3.2    6.2     -1.2    6.2    -11.8   12.0  -2.754  0.199  SIO  CoM
RMS Fits of SIO to IGb00
WRMS NEU   3.41   3.21   7.59 mm, NRMS   1.39   1.00   1.05 Num  88 SIO IGb00
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VESL     2.4    4.2   -1.0    5.5   -1.4   10.7  SIO wrt IGb00
 VILL    -0.2    1.8   -3.3    2.2    4.5    5.7  SIO wrt IGb00
 SFER     6.7    1.6   -9.4    2.2    6.7    4.8  SIO wrt IGb00
 GOUG     4.4    5.9    4.0    9.5  -15.4   25.4  SIO wrt IGb00
 ASC1     1.8    2.5    4.1    4.7   17.7    9.0  SIO wrt IGb00
 HOFN    -0.4    2.3    3.8    3.1   10.4    6.3  SIO wrt IGb00
 MAS1    -0.9    1.5    0.0    2.4   -0.8    5.0  SIO wrt IGb00
 FORT    -1.6    2.5    0.5    4.4   17.4   10.4  SIO wrt IGb00
 STJO     1.8    2.2   -1.9    3.2   -1.8    6.4  SIO wrt IGb00
 KOUR    -1.4    2.1    2.1    4.5   -6.2    9.2  SIO wrt IGb00
 OHI2     7.6    4.7   -3.5    5.1    3.9    9.3  SIO wrt IGb00
 LPGS     2.9    4.7   -0.5    7.0  -19.5   15.2  SIO wrt IGb00
 CRO1    -1.4    3.0    3.0    5.8   13.6   15.2  SIO wrt IGb00
 UNSA     2.1    4.1    0.3    7.2  -11.4   12.6  SIO wrt IGb00
 SCH2    -6.1    2.1   -3.5    3.0    0.0    5.9  SIO wrt IGb00
 RIOG     0.9    4.4    1.4    5.4   -3.6    8.4  SIO wrt IGb00
 THU3    -3.8    4.8   -3.7    5.5   16.6   16.1  SIO wrt IGb00
 SANT     0.4    6.0   -1.5    8.2   -1.6   12.6  SIO wrt IGb00
 WES2    -0.7    2.9   -1.0    4.7  -10.2   10.0  SIO wrt IGb00
 NRC1    -6.3    2.5    0.8    3.9    1.0    8.3  SIO wrt IGb00
 GODE    -2.6    2.2   -2.4    3.4   -2.5    7.1  SIO wrt IGb00
 ALGO    -2.3    2.9   -0.0    3.8  -10.0    9.6  SIO wrt IGb00
 MANA     0.8    3.6    2.9    7.8   -2.0   15.0  SIO wrt IGb00
 NLIB    -0.6    2.8   -0.7    3.7   -4.8    9.1  SIO wrt IGb00
 CHUR    -4.7    5.8   -1.3    7.8   -1.6   16.1  SIO wrt IGb00
 DUBO    -4.7    2.4   -0.2    3.5    2.8    6.8  SIO wrt IGb00
 FLIN    -3.9    2.6    2.4    3.2   -6.8    6.6  SIO wrt IGb00
 MDO1    -1.1    2.9    0.6    3.7    0.1    9.8  SIO wrt IGb00
 PIE1     0.6    3.0   -1.9    5.6   -2.0   13.3  SIO wrt IGb00
 YELL    -3.4    2.8    1.8    2.9    2.6    6.9  SIO wrt IGb00
 DRAO    -2.6    1.6    2.8    2.1  -11.7    4.0  SIO wrt IGb00
 THTI     4.8    3.3    3.6    6.7    1.7   10.3  SIO wrt IGb00
 MKEA     2.1    2.5    4.5    4.7  -20.8    7.5  SIO wrt IGb00
 CHAT     8.1    4.1    1.8    5.5    1.3    8.4  SIO wrt IGb00
 AUCK     5.8    2.4    1.7    3.6   -0.5    5.7  SIO wrt IGb00
 MCM4     4.9    3.1    1.4    3.5    6.3   10.5  SIO wrt IGb00
 BILI    -0.2    3.0   -3.6    3.7   -0.7    8.0  SIO wrt IGb00
 NOUM     0.8    2.8    5.8    5.4   -8.4    9.6  SIO wrt IGb00
 MAC1     6.9    3.4    2.9    4.2   -7.3    7.2  SIO wrt IGb00
 PETP     0.1    3.3   -4.4    4.5  -12.2    8.5  SIO wrt IGb00
 MAG0    -2.0    3.0  -10.2    3.8    2.4    7.3  SIO wrt IGb00
 TIDB     3.2    3.8    2.6    5.2   -6.9    9.0  SIO wrt IGb00
 HOB2     3.6    2.3    1.9    2.9   -7.3    5.8  SIO wrt IGb00
 TOW2     1.8    1.8    1.6    2.9   14.1    5.1  SIO wrt IGb00
 YSSK   -14.5    3.2   -3.2    4.7   -1.2    9.3  SIO wrt IGb00
 TSKB    -4.4    1.9   -8.4    2.8   -0.8    5.2  SIO wrt IGb00
 ALIC     1.9    2.1    1.1    3.1   -3.8    7.3  SIO wrt IGb00
 CEDU     1.1    1.8    0.0    2.6   -5.2    4.9  SIO wrt IGb00
 JAB1     5.6    2.3   -1.1    3.5  -11.2    8.0  SIO wrt IGb00
 DARW    -1.4    2.8    2.1    4.5  -16.5   15.6  SIO wrt IGb00
 YAKT    -0.7    3.4    0.7    4.5  -18.4    9.2  SIO wrt IGb00
 TIXI    -0.3    2.9   -2.2    3.3   -3.0    7.8  SIO wrt IGb00
 KARR    -1.4    2.0   -4.4    3.6   -6.8    6.7  SIO wrt IGb00
 PERT    -5.3    1.9   -4.4    3.0  -13.5    6.2  SIO wrt IGb00
 CAS1     5.6    2.6   -1.6    3.4   11.2    6.6  SIO wrt IGb00
 IRKT    -1.4    3.5   -0.9    5.6  -12.5   10.0  SIO wrt IGb00
 NTUS    -0.7    2.9   -3.6    5.8    4.1   11.4  SIO wrt IGb00
 COCO    -1.1    2.6   -5.1    5.5   -5.3   10.0  SIO wrt IGb00
 KSTU    -2.9    4.2    0.9    5.9   -4.1   12.4  SIO wrt IGb00
 LHAS    -7.9    2.9    3.0    6.1    6.3    9.9  SIO wrt IGb00
 URUM    -3.0    3.0    5.8    4.6   -6.8    8.6  SIO wrt IGb00
 DAV1     4.2    2.5   -0.8    2.9    6.2    5.5  SIO wrt IGb00
 IISC    -5.2    2.6    3.0    4.7    6.0    9.6  SIO wrt IGb00
 POL2    -1.2    2.1   -0.3    2.9    0.3    5.5  SIO wrt IGb00
 DGAR    -6.6    2.5   -0.4    4.5   -7.2    8.5  SIO wrt IGb00
 KERG     3.4    1.9    0.8    2.8    2.0    4.8  SIO wrt IGb00
 KIT3    -2.3    3.2    3.0    5.0   -1.9   11.4  SIO wrt IGb00
 MAW1     5.2    4.0   -0.8    4.4    9.4    8.4  SIO wrt IGb00
 ARTU    -1.6    3.0   -1.6    3.8    0.7    8.2  SIO wrt IGb00
 BAHR    -3.4    2.5    4.3    4.6    5.3    8.2  SIO wrt IGb00
 SYOG     3.1    3.8    1.4    4.6   -5.7   12.0  SIO wrt IGb00
 GLSV     3.4    2.8    5.3    4.3    3.7    8.3  SIO wrt IGb00
 HRAO    -1.9    2.0    2.1    2.9   -0.7    5.5  SIO wrt IGb00
 JOZE     3.1    2.5   -3.4    2.3    9.8    7.8  SIO wrt IGb00
 LAMA     2.9    1.9    3.7    1.9    9.5    5.7  SIO wrt IGb00
 TRO1    -4.4    1.9   -4.6    2.1    9.2    5.8  SIO wrt IGb00
 BOR1     1.2    2.0    0.9    1.9    6.5    6.1  SIO wrt IGb00
 MATE     0.4    1.7   -3.5    2.2    7.3    5.5  SIO wrt IGb00
 GRAZ     1.6    1.6    1.1    1.9    0.7    4.9  SIO wrt IGb00
 POTS     0.2    1.6    2.6    1.8    7.2    4.8  SIO wrt IGb00
 WTZR     1.3    1.7    0.5    1.9    0.8    5.1  SIO wrt IGb00
 NYAL    -2.7    2.9   -3.2    3.1    4.9    8.2  SIO wrt IGb00
 NKLG    -1.3    3.0    1.1    6.3    8.7   11.3  SIO wrt IGb00
 ZIMM     1.7    2.1   -1.0    2.0   13.5    6.2  SIO wrt IGb00
 GRAS    -0.4    1.8    2.3    2.0    8.4    5.7  SIO wrt IGb00
 WSRT     1.0    1.6   -0.6    1.7    2.4    4.5  SIO wrt IGb00
 BRUS     3.4    2.1   -3.3    2.1   -0.3    6.7  SIO wrt IGb00
 Reference sites NOT used 
 
 
 4.0 CENTER FITS TO COMBINED SOLUTION 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 151.50
 
 Transformation of loose solution GFZ to COMB
 -----------------------------------------------
 For   83 Sites, RMS after 7 parameter transformation   1.5 mm  GFZ wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -1.0 3627.2     -0.9 3627.2      1.4 3627.2  -1.712  0.236  GFZ  CoM
RMS Fits of GFZ to COMB
WRMS NEU   1.26   1.45   5.44 mm, NRMS   0.40   0.52   0.49 Num  83 GFZ COMB
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VESL     0.3    3.3   -1.3    2.7    7.7   13.0  GFZ wrt COMB
 VILL     0.2    2.1    0.7    1.9    0.1    7.0  GFZ wrt COMB
 SFER    -0.4    3.4    0.4    3.1    0.3   12.0  GFZ wrt COMB
 ASC1    -2.1    2.8   -0.8    3.4   -2.0   11.1  GFZ wrt COMB
 HOFN     0.3    2.1   -0.1    1.6   -0.6    6.7  GFZ wrt COMB
 MAS1    -1.3    3.0    0.3    3.1    4.3   12.9  GFZ wrt COMB
 FORT    -2.5    3.7   -1.9    4.4  -20.4   17.5  GFZ wrt COMB
 STJO    -0.6    3.6    0.1    2.7   -5.6   11.1  GFZ wrt COMB
 KOUR    -2.1    3.2   -2.0    4.2   -8.0   17.8  GFZ wrt COMB
 OHI2    -0.6    3.8    0.2    2.7    4.9   12.1  GFZ wrt COMB
 LPGS    -1.7    5.3   -0.7    4.8    3.9   23.4  GFZ wrt COMB
 CRO1    -1.9    5.6   -1.3    7.1  -13.0   32.4  GFZ wrt COMB
 UNSA    -1.8    3.4   -0.3    3.4    5.6   13.2  GFZ wrt COMB
 SCH2    -0.7    4.0    1.4    3.2   -5.6   11.9  GFZ wrt COMB
 RIOG    -0.8    3.8    0.7    2.7   11.3   10.3  GFZ wrt COMB
 THU3     0.8    1.7    0.6    1.5   -2.1    7.6  GFZ wrt COMB
 SANT    -1.6    3.4    0.7    3.1    6.7   11.4  GFZ wrt COMB
 WES2    -0.1    4.1   -0.3    3.4   -7.4   15.6  GFZ wrt COMB
 NRC1     0.2    3.1    0.8    2.8   -8.7   11.1  GFZ wrt COMB
 GODE    -0.8    4.6   -2.1    4.7   -9.4   17.3  GFZ wrt COMB
 ALGO     0.5    2.3    0.0    1.9   -2.3    7.1  GFZ wrt COMB
 MANA    -1.2    5.7   -0.2    7.5   -9.5   24.4  GFZ wrt COMB
 NLIB     0.5    3.8   -0.3    3.5   -5.3   14.0  GFZ wrt COMB
 DUBO     0.7    4.0    0.2    3.1   -5.1   12.2  GFZ wrt COMB
 FLIN     1.4    4.7    0.2    3.6   -0.6   13.8  GFZ wrt COMB
 MDO1     1.0    3.7   -1.3    3.7   -9.6   15.2  GFZ wrt COMB
 YELL     1.9    3.7   -0.8    2.6   -2.3   11.7  GFZ wrt COMB
 GOLD     1.1    3.2   -1.7    2.9   -5.1   11.6  GFZ wrt COMB
 DRAO     2.0    3.3   -1.9    2.6    1.5   10.0  GFZ wrt COMB
 THTI    -0.9    2.6    0.3    3.2   -5.2    9.8  GFZ wrt COMB
 MKEA    -1.6    4.3   -1.1    4.8   29.5   17.7  GFZ wrt COMB
 CHAT    -1.5    2.3    0.6    2.1    0.2    7.1  GFZ wrt COMB
 AUCK    -3.2    3.3    2.1    3.1    2.3   11.5  GFZ wrt COMB
 MCM4    -2.8    4.5    0.8    3.6    4.1   24.3  GFZ wrt COMB
 BILI     1.1    2.1   -0.1    1.7    3.8    7.0  GFZ wrt COMB
 NOUM    -1.5    3.0    0.1    3.2   -1.1   11.7  GFZ wrt COMB
 MAC1    -0.8    2.4    0.7    1.8   -4.9    6.5  GFZ wrt COMB
 PETP     1.4    3.5    0.3    2.6    5.2   10.1  GFZ wrt COMB
 MAG0     3.1    4.5    1.1    3.3    7.3   13.7  GFZ wrt COMB
 TIDB    -1.2    3.2   -1.2    2.9   -2.7   11.3  GFZ wrt COMB
 HOB2    -1.5    3.2   -1.0    2.5   -5.3   10.1  GFZ wrt COMB
 TOW2    -1.7    2.7   -1.2    2.8  -11.3   10.9  GFZ wrt COMB
 YSSK     1.6    3.4    0.5    2.5    3.6   10.0  GFZ wrt COMB
 TSKB     0.5    3.4    1.7    3.0    1.3   12.1  GFZ wrt COMB
 ALIC    -0.7    3.7    0.2    3.7   -2.0   15.3  GFZ wrt COMB
 CEDU     0.5    2.9   -0.5    2.7   -4.0   11.0  GFZ wrt COMB
 YAKT     0.2    3.7   -2.4    2.6    7.3   11.1  GFZ wrt COMB
 TIXI     1.9    3.0   -0.4    2.3    7.2   11.8  GFZ wrt COMB
 KARR     1.1    3.8    2.8    4.0   -0.4   15.6  GFZ wrt COMB
 PERT     1.3    4.3    5.1    4.2    1.7   16.9  GFZ wrt COMB
 CAS1    -1.4    3.2    0.8    2.5   -5.8   10.8  GFZ wrt COMB
 IRKT     2.1    4.9    0.0    3.4    8.5   15.5  GFZ wrt COMB
 NTUS     1.0    2.6    0.9    3.1   -3.9   10.6  GFZ wrt COMB
 COCO     1.1    2.6    1.6    3.1   -5.5   10.7  GFZ wrt COMB
 KSTU    -0.1    6.2    0.2    4.2    6.6   19.8  GFZ wrt COMB
 LHAS     1.5    3.4   -0.7    3.3    7.4   14.2  GFZ wrt COMB
 URUM     1.6    3.2   -1.3    2.5   10.3    9.8  GFZ wrt COMB
 DAV1    -2.3    3.1   -1.6    2.6   -5.2   11.1  GFZ wrt COMB
 IISC     0.6    1.9   -0.3    2.2    0.2    7.4  GFZ wrt COMB
 DGAR     0.9    1.9   -0.3    2.2   -1.3    6.8  GFZ wrt COMB
 KERG    -1.8    3.9   -1.4    3.1  -11.9   12.0  GFZ wrt COMB
 MAW1     1.3    5.5    1.0    7.1   -2.3   15.6  GFZ wrt COMB
 ARTU     1.2    3.5   -0.1    2.6    4.6   10.9  GFZ wrt COMB
 BAHR     1.0    1.9   -0.9    2.0    3.1    7.6  GFZ wrt COMB
 MALI    -1.1    4.5    0.2    5.3   -0.0   20.1  GFZ wrt COMB
 TRAB     0.6    3.3   -0.6    2.7   -0.9   10.9  GFZ wrt COMB
 SYOG     0.8    5.0   -2.3    3.7    0.2   18.8  GFZ wrt COMB
 NICO     0.8    4.0   -0.4    3.4   -0.0   15.7  GFZ wrt COMB
 HRAO    -2.3    5.1    1.6    5.8   10.1   21.9  GFZ wrt COMB
 JOZE     4.2    4.4   -2.6    5.1    1.7   14.3  GFZ wrt COMB
 TRO1     0.7    3.1    7.8    2.3    4.8   11.6  GFZ wrt COMB
 BOR1    -0.3    4.4   -1.5    5.0    1.7   13.9  GFZ wrt COMB
 MATE     0.8    3.2    0.5    2.8    3.8   10.7  GFZ wrt COMB
 POTS     0.2    3.1    0.2    2.4   -1.2    9.5  GFZ wrt COMB
 WTZR     0.3    3.1    0.2    2.5    2.3    9.4  GFZ wrt COMB
 ONSA     0.3    3.2    0.7    2.5   -1.1   10.2  GFZ wrt COMB
 NYAL     0.6    2.7    0.3    2.3    7.6   14.1  GFZ wrt COMB
 NKLG    -1.3    3.3    0.8    4.0   -7.2   14.6  GFZ wrt COMB
 ZIMM    -0.7    3.4   -0.9    2.8    5.7   10.3  GFZ wrt COMB
 GRAS    -0.0    3.3    0.5    2.8    4.1   10.6  GFZ wrt COMB
 WSRT     0.1    3.4    1.2    2.7    0.6   10.5  GFZ wrt COMB
 BRUS    -0.3    3.6   -0.3    2.9    0.2   12.0  GFZ wrt COMB
 Reference sites NOT used 
 GLSV    -0.7   14.1   -3.9   23.9    6.8   27.1  GFZ wrt COMB
 GRAZ     2.9   25.1    0.7   41.4    0.6   57.1  GFZ wrt COMB
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 6.02
 
 Transformation of loose solution SIO to COMB
 -----------------------------------------------
 For   88 Sites, RMS after 7 parameter transformation   1.3 mm  SIO wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -3.2    6.2     -1.2    6.2    -11.9   12.0  -2.671  0.199  SIO  CoM
RMS Fits of SIO to COMB
WRMS NEU   1.06   1.62   3.52 mm, NRMS   0.43   0.50   0.49 Num  88 SIO COMB
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VESL    -1.4    4.2   -0.4    5.5   -7.5   10.7  SIO wrt COMB
 VILL     0.3    1.8   -0.8    2.2   -1.6    5.7  SIO wrt COMB
 SFER     0.3    1.6   -0.6    2.2   -0.1    4.8  SIO wrt COMB
 GOUG     1.7    5.9    1.0    9.5    7.8   25.4  SIO wrt COMB
 ASC1     2.8    2.5    1.6    4.7    2.5    9.0  SIO wrt COMB
 HOFN    -0.1    2.3    1.3    3.1   -1.2    6.3  SIO wrt COMB
 MAS1     0.4    1.5   -0.4    2.4    0.0    5.0  SIO wrt COMB
 FORT     2.3    2.5    2.2    4.4    9.4   10.4  SIO wrt COMB
 STJO     0.3    2.2   -0.4    3.2    1.8    6.4  SIO wrt COMB
 KOUR     1.4    2.1    2.5    4.5    5.0    9.2  SIO wrt COMB
 OHI2     0.7    4.7   -1.3    5.1   -2.7    9.3  SIO wrt COMB
 LPGS     2.4    4.7    0.9    7.0   -1.9   15.2  SIO wrt COMB
 CRO1     0.6    3.0    1.1    5.8    3.6   15.2  SIO wrt COMB
 UNSA     2.5    4.1    1.7    7.2   -4.9   12.6  SIO wrt COMB
 SCH2    -0.2    2.1   -0.9    3.0    1.9    5.9  SIO wrt COMB
 RIOG     0.5    4.4   -1.1    5.4   -5.7    8.4  SIO wrt COMB
 THU3    -1.8    4.8   -3.5    5.5   -1.0   16.1  SIO wrt COMB
 SANT     1.7    6.0   -2.8    8.2   -7.6   12.6  SIO wrt COMB
 WES2    -0.0    2.9    0.4    4.7    3.0   10.0  SIO wrt COMB
 NRC1    -0.3    2.5   -1.8    3.9    4.2    8.3  SIO wrt COMB
 GODE    -0.3    2.2    0.5    3.4    3.1    7.1  SIO wrt COMB
 ALGO    -0.4    2.9    0.9    3.8   -0.9    9.6  SIO wrt COMB
 MANA     0.4    3.6    2.3    7.8    2.0   15.0  SIO wrt COMB
 NLIB    -0.5    2.8    1.0    3.7    2.7    9.1  SIO wrt COMB
 CHUR    -0.9    5.8   -0.6    7.8    0.7   16.1  SIO wrt COMB
 DUBO    -0.9    2.4   -0.1    3.5    2.5    6.8  SIO wrt COMB
 FLIN    -1.0    2.6    1.0    3.2    1.0    6.6  SIO wrt COMB
 MDO1    -0.5    2.9    1.8    3.7    3.8    9.8  SIO wrt COMB
 PIE1    -0.7    3.0    1.7    5.6    2.3   13.3  SIO wrt COMB
 YELL    -1.2    2.8    1.7    2.9    1.7    6.9  SIO wrt COMB
 DRAO    -0.8    1.6    2.2    2.1    1.1    4.0  SIO wrt COMB
 THTI     1.8    3.3    0.8    6.7    3.7   10.3  SIO wrt COMB
 MKEA     0.2    2.5    4.2    4.7   -4.2    7.5  SIO wrt COMB
 CHAT     4.3    4.1   -0.7    5.5   -3.5    8.4  SIO wrt COMB
 AUCK     1.9    2.4   -1.6    3.6    3.0    5.7  SIO wrt COMB
 MCM4     1.5    3.1   -0.5    3.5    1.3   10.5  SIO wrt COMB
 BILI     0.0    3.0   -2.1    3.7   -8.0    8.0  SIO wrt COMB
 NOUM     1.5    2.8   -0.1    5.4    2.1    9.6  SIO wrt COMB
 MAC1     2.6    3.4   -0.0    4.2    1.6    7.2  SIO wrt COMB
 PETP    -0.4    3.3   -2.4    4.5   -5.4    8.5  SIO wrt COMB
 MAG0    -0.8    3.0   -2.5    3.8   -3.9    7.3  SIO wrt COMB
 TIDB     3.1    3.8    4.2    5.2    2.1    9.0  SIO wrt COMB
 HOB2     1.2    2.3    0.6    2.9    4.6    5.8  SIO wrt COMB
 TOW2     0.7    1.8    0.1    2.9    5.6    5.1  SIO wrt COMB
 YSSK    -1.0    3.2   -3.0    4.7   -5.5    9.3  SIO wrt COMB
 TSKB    -0.8    1.9   -2.2    2.8   -0.9    5.2  SIO wrt COMB
 ALIC     0.4    2.1   -0.3    3.1    4.6    7.3  SIO wrt COMB
 CEDU     0.5    1.8    0.1    2.6    4.6    4.9  SIO wrt COMB
 JAB1    -0.2    2.3   -0.7    3.5    5.2    8.0  SIO wrt COMB
 DARW    -0.4    2.8   -0.6    4.5    7.0   15.6  SIO wrt COMB
 YAKT    -0.1    3.4    5.5    4.5   -8.1    9.2  SIO wrt COMB
 TIXI    -0.5    2.9   -0.0    3.3   -5.7    7.8  SIO wrt COMB
 KARR    -0.5    2.0   -2.4    3.6    4.4    6.7  SIO wrt COMB
 PERT    -0.0    1.9   -2.1    3.0    4.2    6.2  SIO wrt COMB
 CAS1     2.1    2.6   -1.0    3.4    3.2    6.6  SIO wrt COMB
 IRKT    -1.7    3.5   -1.5    5.6   -4.2   10.0  SIO wrt COMB
 NTUS    -1.7    2.9   -3.9    5.8    4.4   11.4  SIO wrt COMB
 COCO    -1.5    2.6   -5.7    5.5    6.5   10.0  SIO wrt COMB
 KSTU    -0.7    4.2    0.5    5.9   -4.6   12.4  SIO wrt COMB
 LHAS    -2.3    2.9    0.6    6.1   -4.4    9.9  SIO wrt COMB
 URUM    -1.3    3.0    4.2    4.6  -10.6    8.6  SIO wrt COMB
 DAV1     1.7    2.5    1.0    2.9    3.5    5.5  SIO wrt COMB
 IISC    -1.8    2.6   -0.2    4.7   -5.3    9.6  SIO wrt COMB
 POL2    -1.1    2.1    1.1    2.9   -1.9    5.5  SIO wrt COMB
 DGAR    -2.2    2.5    0.5    4.5    0.7    8.5  SIO wrt COMB
 KERG     1.0    1.9    0.4    2.8    5.0    4.8  SIO wrt COMB
 KIT3    -1.3    3.2    0.9    5.0   -2.2   11.4  SIO wrt COMB
 MAW1    -0.8    4.0    0.7    4.4    1.2    8.4  SIO wrt COMB
 ARTU    -0.4    3.0   -0.6    3.8   -4.0    8.2  SIO wrt COMB
 BAHR    -1.4    2.5    2.5    4.6   -6.3    8.2  SIO wrt COMB
 SYOG     0.8    3.8    1.7    4.6    2.0   12.0  SIO wrt COMB
 GLSV     0.2    2.8    0.0    4.3   -1.8    8.3  SIO wrt COMB
 HRAO     1.3    2.0   -1.8    2.9    1.2    5.5  SIO wrt COMB
 JOZE    -0.7    2.5    0.6    2.3   -2.0    7.8  SIO wrt COMB
 LAMA     0.6    1.9    0.2    1.9   -1.6    5.7  SIO wrt COMB
 TRO1     0.4    1.9   -5.8    2.1   -2.8    5.8  SIO wrt COMB
 BOR1     0.7    2.0    0.1    1.9   -1.8    6.1  SIO wrt COMB
 MATE     0.1    1.7   -0.0    2.2   -2.4    5.5  SIO wrt COMB
 GRAZ     0.3    1.6   -0.0    1.9   -1.1    4.9  SIO wrt COMB
 POTS     0.4    1.6    0.0    1.8   -1.1    4.8  SIO wrt COMB
 WTZR     0.4    1.7   -0.0    1.9   -1.9    5.1  SIO wrt COMB
 NYAL     0.1    2.9   -1.1    3.1   -3.9    8.2  SIO wrt COMB
 NKLG     2.2    3.0   -1.8    6.3    5.9   11.3  SIO wrt COMB
 ZIMM     0.8    2.1    0.1    2.0   -3.3    6.2  SIO wrt COMB
 GRAS     0.4    1.8   -0.5    2.0   -2.4    5.7  SIO wrt COMB
 WSRT     0.4    1.6   -0.5    1.7   -1.4    4.5  SIO wrt COMB
 BRUS     0.6    2.1   -0.4    2.1   -1.2    6.7  SIO wrt COMB
 Reference sites NOT used 
 
 
 5.0 EOP ESIMATES FROM THE CONSTRAINED COMBINED SOLUTION
 
  MJD      Xpole   Ypole  UT1-UTC    LOD  Xsig  Ysig   UTsig  LODsig  Nr Nf Nt    Xrt    Yrt  Xrtsig  Yrtsig XYcorr XUTcor YUTcor
             (10**-6")       (0.1 usec)    (10**-6")     (0.1 usec)              (10**-6"/d)    (10**-6"/d)
53190.50    1537  512929 -4666032  -5651    67    69    6701      98 215  0  0   2253    844    154    154    0.007  0.000 -0.000
53191.50    3894  513615 -4661629  -3181    63    64    6734      84 215  0  0   2424    749    121    122    0.005  0.000 -0.000
53192.50    6182  514188 -4659342  -1539    64    66    6768      85 215  0  0   2304    685    122    122   -0.009  0.000 -0.000
53193.50    8343  514744 -4658145  -1029    64    65    6802      85 215  0  0   2377    545    122    123   -0.003 -0.000 -0.000
53194.50   10784  515167 -4657012  -1381    64    65    6835      85 215  0  0   2956    629    122    123    0.004 -0.000 -0.001
53195.50   13881  515797 -4655109  -2512    62    64    6868      83 215  0  0   3211   1015    121    122   -0.008 -0.000 -0.001
53196.50   16799  516875 -4651776  -4182    67    69    6902      98 215  0  0   2802   1128    153    155    0.005 -0.000 -0.001



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