Subject: [IGSREPORT-6687] Wk 1035 MIT T2 Analysis Report
From: Thomas Herring
Date: Wed, 1 Dec 1999 18:41:29 PST

******************************************************************************
IGS Electronic Report    Wed Dec  1 18:41:29 PST 1999      Message Number 6687
******************************************************************************

Author: Thomas Herring
Subject: Wk 1035 MIT T2 Analysis Report

********************************************************************************
MIT ANALYSIS REPORT GPS-WEEK XXXX    Dates: 96jan07  to  96jan13 
********************************************************************************

MIT (Massachusetts Institute of Technology) 
Room 54-618
77 Massachusetts Avenue, 
Cambridge,  MA  02139
e-mail: [email-masked] 
tel:    (617)253-5941 (Tom Herring)
fax:    (617)253-1699

PRODUCTS GENERATED:
The following products are generated and uploaded into CDDIS @ NASA/GSFC
   MITXXXXg.SNX   Combined sinex file from all available analysis centers
   MITXXXXg.SUM   Name of this summary file
   MITXXXXg.RES   File of the individual AC position estimates residuals 
                  to the combined solution for the week. 

0.0 Starting Week 1020, we adopted the ITRF97 reference frame
0.1 Starting Week 1002, we re-ordered the summary to give the residual
    summary and the SINEX file errors first.  

CENTER SUMMARY STATISTICS
 CENTER   #       North           East           Up
               RMS    Chi     RMS    Chi    RMS     Chi
              (mm)           (mm)          (mm)
 COD    112    1.1    1.2     1.0    1.0     7.4    2.0  
 JPL     74    3.2    1.2     2.6     .9     7.1     .8  
 SIO    133    2.0    1.1     2.8     .9    12.8    1.8  
 EMR     47    3.3     .9     7.9    1.2    10.5     .8  
 ESA     55    2.6     .9     3.8     .8    14.8    1.7  
 GFZ     64    2.8    1.5     1.8    1.0     7.4    1.2  
 NGS     72    6.3    1.3     5.9     .9    18.8    1.5  
 
CENTER SINEX ERRORS: (corrected during processing).
 CNT  Site Type of Error           Used values                       IGS.SNX values
 NOA  BAHR Used ASH700936B_M     dL1   .0000   .0000   .1089  dL2   .0000   .0000   .1274  m
 NOA  BAHR Real ASH700936B_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  BAKO Used TRM14532.00      dL1   .0000   .0000   .0757  dL2   .0000   .0000   .0745  m
 NOA  BAKO Real 4000ST L1/L2 GEO dL1   .0000  -.0030   .0780  dL2  -.0031  -.0013   .0744  m
 NOA  BAKO Eccentricity: Used          .0000   .0000  1.6760 Real   .0000   .0000  1.6160  m
 NOA  GOUG Used TRM29659.00      dL1   .0000   .0000   .1098  dL2   .0000   .0000   .1280  m
 NOA  GOUG Real TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  HARK Used TRM29659.00      dL1   .0000   .0000   .1098  dL2   .0000   .0000   .1280  m
 NOA  HARK Real TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  KERG Used TRM29659.00      dL1   .0000   .0000   .1098  dL2   .0000   .0000   .1280  m
 NOA  KERG Real TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  MAG0 Used ASH700936D_M     dL1   .0000   .0000   .1089  dL2   .0000   .0000   .1274  m
 NOA  MAG0 Real ASH700936D_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  MATE Used TRM29659.00      dL1   .0000   .0000   .1098  dL2   .0000   .0000   .1280  m
 NOA  MATE Real TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  NOUM Used TRM29659.00      dL1   .0000   .0000   .1098  dL2   .0000   .0000   .1280  m
 NOA  NOUM Real TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  RIOG Used ASH700936C_M     dL1   .0000   .0000   .1089  dL2   .0000   .0000   .1274  m
 NOA  RIOG Real ASH700936C_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  TIXI Used ASH700936D_M     dL1   .0000   .0000   .1089  dL2   .0000   .0000   .1274  m
 NOA  TIXI Real ASH700936D_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 COD  MDVO Used TRM14532.10      dL1   .0000  -.0030   .0780  dL2  -.0031  -.0013   .0744  m
 COD  MDVO Real TRM14532.10      dL1  -.0016   .0009   .0960  dL2   .0016   .0041   .0944  m
 COD  GOPE Used ASH701073.3      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 COD  GOPE Real TRM14532.00      dL1   .0000  -.0030   .0780  dL2  -.0031  -.0013   .0744  m
 SIO  PIMO Eccentricity: Used          .0000   .0000   .0791 Real   .0000   .0000   .0792  m
 SIO  MAW1 Eccentricity: Used          .0000   .0000   .0030 Real   .0000   .0000   .0035  m
 SIO  MDVO Used TRM14532.00      dL1   .0000  -.0030   .0780  dL2  -.0031  -.0013   .0744  m
 SIO  MDVO Real TRM14532.10      dL1  -.0016   .0009   .0960  dL2   .0016   .0041   .0944  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 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 ITRF 1996
 Transformation of loose solution COMBINED to ITRF97
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation   3.7 mm  COMBINED wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -1.3    0.9     -2.6    0.9      6.0    0.8  -1.952  0.104  COMBINED  CoM
 
 Adjustments to core site positions for COMBINED
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     2.8    0.5    4.5    0.6   -9.8    2.4  COMBINED wrt ITRF97
 FORT     5.6    1.4    1.1    2.8   -2.2    6.7  COMBINED wrt ITRF97
 KOUR     3.5    1.9   10.5    6.7  -11.4   18.7  COMBINED wrt ITRF97
 BRMU     1.8    0.5   -0.3    0.8    5.9    2.7  COMBINED wrt ITRF97
 THU1    -2.2    0.7   -1.6    0.7    9.5    3.2  COMBINED wrt ITRF97
 SANT     4.5    1.7    5.4    2.8  -12.8    5.9  COMBINED wrt ITRF97
 AREQ     3.5    1.2    3.3    1.9   -0.7    6.0  COMBINED wrt ITRF97
 WES2    -3.1    0.5    6.2    0.6    5.8    2.4  COMBINED wrt ITRF97
 GODE     1.9    1.0    4.0    1.2    2.4    4.5  COMBINED wrt ITRF97
 ALGO     2.3    0.5    3.7    0.6   10.0    1.8  COMBINED wrt ITRF97
 NLIB    -1.8    0.5   -3.7    0.6   12.9    2.5  COMBINED wrt ITRF97
 MDO1    -3.7    1.3   -3.9    1.7   -1.5    7.5  COMBINED wrt ITRF97
 PIE1    -5.4    0.6    0.2    0.7    6.8    2.9  COMBINED wrt ITRF97
 YELL    -1.0    0.7   -1.4    0.6    7.3    2.4  COMBINED wrt ITRF97
 DRAO    -2.3    0.7   -3.1    1.0    5.7    2.7  COMBINED wrt ITRF97
 FAIR    -0.6    0.7    4.5    0.7  -18.2    2.4  COMBINED wrt ITRF97
 KOKB    -2.1    0.7   10.6    1.3    4.5    2.7  COMBINED wrt ITRF97
 MAC1    -0.9    1.1   -4.7    1.2   -0.1    3.5  COMBINED wrt ITRF97
 HOB2     1.4    0.7    0.7    0.9   -0.2    2.4  COMBINED wrt ITRF97
 GUAM     3.8    0.9   -6.9    1.7   -5.8    3.5  COMBINED wrt ITRF97
 TSKB     7.2    0.7   -6.5    0.9    6.6    3.1  COMBINED wrt ITRF97
 PERT    -0.9    0.6    1.9    0.9   -6.4    2.8  COMBINED wrt ITRF97
 YAR1    -0.8    0.7    5.3    0.9   -4.2    2.9  COMBINED wrt ITRF97
 IRKT     0.0    0.6   -4.7    0.7    2.3    2.1  COMBINED wrt ITRF97
 LHAS    -4.7    3.4  -13.2   11.0  -14.1   20.5  COMBINED wrt ITRF97
 DAV1     0.2    1.0    1.3    1.2   -6.4    3.2  COMBINED wrt ITRF97
 KERG     1.2    0.9    0.3    1.7  -18.8    3.5  COMBINED wrt ITRF97
 MALI    -7.6    1.4    1.7    4.4   37.0    8.6  COMBINED wrt ITRF97
 ZWEN    -2.3    0.5    2.0    0.5  -11.2    1.7  COMBINED wrt ITRF97
 TROM     6.1    1.2    5.3    1.6   12.0    5.0  COMBINED wrt ITRF97
 MATE    -4.3    0.5    2.8    0.6   -4.1    2.5  COMBINED wrt ITRF97
 GRAZ    -0.1    0.6   -1.0    0.6   -1.6    2.6  COMBINED wrt ITRF97
 POTS    -2.4    0.5   -1.6    0.5   -5.7    1.7  COMBINED wrt ITRF97
 WTZR    -0.1    0.5    0.7    0.5    2.0    1.7  COMBINED wrt ITRF97
 ONSA     0.2    0.5    0.6    0.5  -11.8    1.7  COMBINED wrt ITRF97
 NYAL     7.5    1.3    3.6    1.4   27.5    5.3  COMBINED wrt ITRF97
 KOSG    -0.7    0.5    3.1    0.5   -5.1    1.9  COMBINED wrt ITRF97
 Reference sites NOT used 

 3.0 CENTER FITS TO ITRF 1996
 CENTER EMR
 -------------------
 VARIANCE RESCALING FACTOR FOR EMR 22.98
 
 Transformation of loose solution EMR to ITRF97
 -----------------------------------------------
 For   29 Sites, RMS after 7 parameter transformation   8.5 mm  EMR wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
  -16.7   11.1     40.3   13.1    -78.8   46.4  -2.061  0.533  EMR  CoM
 
 Adjustments to core site positions for EMR
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.4    2.8    4.8    4.6  -15.7   10.4  EMR wrt ITRF97
 MAS1    -9.6    2.8   -5.6    4.9  -16.3   10.5  EMR wrt ITRF97
 FORT     1.6    7.0  -43.4   24.4   17.3   47.5  EMR wrt ITRF97
 BRMU     0.0    2.6   -1.8    5.7    2.5   11.3  EMR wrt ITRF97
 THU1    -1.3    5.3   -3.6    7.1   10.7   20.1  EMR wrt ITRF97
 SANT     8.6    7.2   25.3   19.3    5.2   23.9  EMR wrt ITRF97
 AREQ     2.9    5.0   13.5   10.8   20.0   23.8  EMR wrt ITRF97
 ALGO     2.1    2.5    5.8    4.8   10.8    9.0  EMR wrt ITRF97
 YELL     1.7    3.8   -6.9    6.4   10.0   12.8  EMR wrt ITRF97
 GOL2    -0.7    3.1   -6.6    5.5    6.2   12.2  EMR wrt ITRF97
 DRAO     1.9    2.9   -4.2    4.4   -4.7    9.0  EMR wrt ITRF97
 FAIR    -1.8    3.6   -4.2    5.1  -24.3   11.1  EMR wrt ITRF97
 KOKB    -0.7    4.0   27.8    7.3   14.2   15.0  EMR wrt ITRF97
 MAC1     3.5    4.2    1.9    7.0    8.5   13.2  EMR wrt ITRF97
 TID2    -9.2    3.3   -7.8    6.2   68.6   13.7  EMR wrt ITRF97
 HOB2     5.4    3.2    5.9    5.8    7.9   12.3  EMR wrt ITRF97
 GUAM    -0.3    4.2  -24.0   20.2   13.6   21.7  EMR wrt ITRF97
 TSKB     1.7    4.0   10.7    7.3   13.2   16.4  EMR wrt ITRF97
 YAR1    10.3    3.5   14.6    8.5    1.8   17.4  EMR wrt ITRF97
 IRKT     0.1    3.5   -6.6    7.4  -16.3   10.7  EMR wrt ITRF97
 DAV1     4.2    5.8   22.1    9.8  -12.2   18.5  EMR wrt ITRF97
 KERG     9.9    4.9  -19.5    7.9  -32.5   15.9  EMR wrt ITRF97
 MALI   -13.3    6.7    8.2   27.8   17.9   46.1  EMR wrt ITRF97
 ZWEN    -0.1    3.0    4.6    4.8  -27.0    8.8  EMR wrt ITRF97
 POTS    -0.9    3.1   -1.5    4.8  -19.2   10.9  EMR wrt ITRF97
 WTZR     2.1    2.8    4.2    4.3  -13.6    8.8  EMR wrt ITRF97
 NYAL    10.4    5.3    1.3    5.6   14.3   17.8  EMR wrt ITRF97
 KOSG     0.4    4.4    2.4    8.0  -21.8   20.3  EMR wrt ITRF97
 Reference sites NOT used 
 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 11.41
 
 Transformation of loose solution JPL to ITRF97
 -----------------------------------------------
 For   24 Sites, RMS after 7 parameter transformation   4.1 mm  JPL wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   15.2    8.0     -9.7    8.1     28.2    9.3  -2.645  0.338  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1    -2.5    1.7   -9.6    1.9  -21.0    6.3  JPL wrt ITRF97
 FORT     8.0    3.3    1.7    6.6   -7.0   14.7  JPL wrt ITRF97
 THU1    -4.9    4.7   -1.5    3.8  -14.7   19.5  JPL wrt ITRF97
 SANT     8.3    3.9    4.5    4.3    0.8   11.2  JPL wrt ITRF97
 AREQ     3.6    4.0   10.1    4.9   20.7   19.1  JPL wrt ITRF97
 ALGO     0.5    1.7    3.1    1.7    6.8    5.5  JPL wrt ITRF97
 MDO1    -3.3    5.1    2.5    7.5    1.3   21.2  JPL wrt ITRF97
 PIE1    -4.5    2.0    4.3    2.4    1.0    7.7  JPL wrt ITRF97
 YELL    -1.1    2.2   -0.9    1.8    8.3    7.4  JPL wrt ITRF97
 GOL2    -4.8    1.9  -11.6    3.0    5.5    7.2  JPL wrt ITRF97
 FAIR    -0.9    2.0    5.1    1.7  -22.5    6.3  JPL wrt ITRF97
 KOKB    -6.1    2.1    4.5    2.8    5.6    7.1  JPL wrt ITRF97
 MAC1     5.5    2.8   -3.3    3.0    6.7    8.9  JPL wrt ITRF97
 HOB2     6.6    2.0    2.5    2.2    6.1    7.0  JPL wrt ITRF97
 GUAM     1.6    4.6  -18.3   11.2    6.4   22.9  JPL wrt ITRF97
 TSKB     2.5    2.1   -7.4    2.2   18.6    7.2  JPL wrt ITRF97
 PERT     2.2    3.9    2.5    4.2   -4.2   15.6  JPL wrt ITRF97
 YAR1     0.7    2.1    5.0    2.3   -8.8    8.2  JPL wrt ITRF97
 IRKT    -2.2    2.0   -4.1    2.8    2.5    6.2  JPL wrt ITRF97
 DAV1    -4.9    3.4   -3.7    3.2   -1.6    9.9  JPL wrt ITRF97
 MALI    -2.8    4.0    0.2    7.0   22.6   21.7  JPL wrt ITRF97
 MATE    -2.8    2.0    6.7    2.0   -5.9    7.3  JPL wrt ITRF97
 WTZR     1.8    1.7    2.8    1.6   -0.8    5.5  JPL wrt ITRF97
 ONSA     2.1    1.8    2.1    1.5  -12.2    5.4  JPL wrt ITRF97
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 113.8
 
 Transformation of loose solution GFZ to ITRF97
 -----------------------------------------------
 For   29 Sites, RMS after 7 parameter transformation   4.6 mm  GFZ wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -1.1    2.0     -1.6    1.9      4.5    1.2  -1.139  0.241  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     2.6    1.5    4.4    1.7   -9.9    5.4  GFZ wrt ITRF97
 FORT     7.5    2.8   -1.4    3.6    2.7   12.2  GFZ wrt ITRF97
 BRMU     3.5    1.5   -3.6    1.6    9.0    5.9  GFZ wrt ITRF97
 THU1    -5.3    1.8   -1.3    1.6    2.4    8.1  GFZ wrt ITRF97
 SANT    12.0    7.0    8.7    9.9   -2.7   23.0  GFZ wrt ITRF97
 AREQ     6.7    2.5    3.0    2.7   16.2   10.8  GFZ wrt ITRF97
 WES2    -2.7    1.5    4.6    1.4    8.4    5.0  GFZ wrt ITRF97
 ALGO     2.0    1.4    2.0    1.3    9.7    4.5  GFZ wrt ITRF97
 NLIB    -2.3    1.5   -2.0    1.5   19.0    5.7  GFZ wrt ITRF97
 MDO1    -2.0    3.5   -5.2    3.6    2.7   15.3  GFZ wrt ITRF97
 YELL    -2.8    1.6   -3.1    1.3    4.1    5.1  GFZ wrt ITRF97
 DRAO    -4.4    1.4   -2.9    1.4    3.0    4.5  GFZ wrt ITRF97
 FAIR     0.3    2.9    7.3    3.5  -28.3    7.6  GFZ wrt ITRF97
 MAC1     3.0    1.9   -7.1    1.9   -2.5    5.7  GFZ wrt ITRF97
 HOB2     6.0    1.7   -1.1    1.8    7.0    5.6  GFZ wrt ITRF97
 GUAM     0.3    1.9   -6.4    2.7    2.4    7.3  GFZ wrt ITRF97
 TSKB     3.2    1.8   -5.8    1.9    7.7    6.7  GFZ wrt ITRF97
 YAR1    -0.2    2.1    6.0    2.2  -14.1    7.9  GFZ wrt ITRF97
 IRKT    -2.3    1.7   -6.6    1.5   -8.3    5.1  GFZ wrt ITRF97
 DAV1     2.5    2.3    1.6    2.3  -12.2    6.8  GFZ wrt ITRF97
 MALI     2.4   10.2   -2.1   19.9   96.0   58.5  GFZ wrt ITRF97
 ZWEN    -5.6    1.4    0.9    1.4  -14.6    4.3  GFZ wrt ITRF97
 MATE    -6.0    2.9    4.9    4.7   -5.7    7.8  GFZ wrt ITRF97
 POTS    -1.3    1.4   -1.0    1.2   -8.9    4.2  GFZ wrt ITRF97
 WTZR    -1.4    1.4    1.0    1.3   -0.7    4.4  GFZ wrt ITRF97
 ONSA    -1.4    1.4    0.9    1.2  -16.3    4.3  GFZ wrt ITRF97
 KOSG    -1.1    1.4    1.9    1.3  -11.4    4.5  GFZ wrt ITRF97
 Reference sites NOT used 
 
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 69.63
 
 Transformation of loose solution COD to ITRF97
 -----------------------------------------------
 For   29 Sites, RMS after 7 parameter transformation   3.5 mm  COD wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
  -13.3    3.0    -15.1    2.9     13.9    4.7  -2.687  0.164  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     4.2    0.8    4.9    0.8   -6.7    3.7  COD wrt ITRF97
 BRMU     1.8    0.9    2.8    1.3    2.2    4.4  COD wrt ITRF97
 THU1    -0.7    0.9   -2.6    1.0   14.8    4.4  COD wrt ITRF97
 WES2    -2.8    0.8    8.3    1.0   -1.1    3.5  COD wrt ITRF97
 GODE     1.3    1.5    5.7    1.5   -6.3    7.5  COD wrt ITRF97
 ALGO     2.4    0.7    5.6    0.9    7.2    2.9  COD wrt ITRF97
 NLIB    -2.2    0.7   -3.3    0.8    5.5    3.6  COD wrt ITRF97
 MDO1    -6.1    2.0   -3.9    2.1   -1.8   13.0  COD wrt ITRF97
 PIE1    -6.7    0.8   -0.2    1.0    2.3    4.0  COD wrt ITRF97
 YELL    -0.1    1.0   -1.8    0.8    4.6    3.8  COD wrt ITRF97
 FAIR    -0.2    1.0    1.5    1.0  -12.7    3.6  COD wrt ITRF97
 KOKB    -2.6    1.2    5.9    2.5   -0.7    4.6  COD wrt ITRF97
 HOB2    -1.7    1.1    3.3    1.5   -9.9    4.4  COD wrt ITRF97
 GUAM     4.1    1.4   -7.1    3.3  -14.5    5.5  COD wrt ITRF97
 TSKB     8.2    1.3   -7.9    1.5    6.9    5.7  COD wrt ITRF97
 PERT    -3.2    0.8    1.5    1.4  -10.2    3.9  COD wrt ITRF97
 YAR1    -2.1    1.0    5.1    1.5   -5.6    5.0  COD wrt ITRF97
 IRKT     0.1    1.0   -4.2    1.1   16.8    3.4  COD wrt ITRF97
 DAV1    -0.4    1.7   -0.7    2.4   -3.4    4.9  COD wrt ITRF97
 KERG     1.5    1.3    1.5    2.4  -16.5    5.0  COD wrt ITRF97
 ZWEN     0.2    0.7    3.6    0.7    2.5    2.6  COD wrt ITRF97
 MATE    -2.4    0.7    3.6    0.7    3.6    3.7  COD wrt ITRF97
 GRAZ     1.9    0.7   -0.1    0.6    7.9    3.3  COD wrt ITRF97
 POTS    -0.5    0.7   -0.9    0.6    4.7    2.5  COD wrt ITRF97
 WTZR     1.4    0.7    1.3    0.6   14.4    2.7  COD wrt ITRF97
 ONSA     2.3    0.7    1.8    0.6   -0.8    2.6  COD wrt ITRF97
 KOSG     1.0    0.7    3.8    0.6    6.8    2.8  COD wrt ITRF97
 Reference sites NOT used 
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 1.672
 
 Transformation of loose solution SIO to ITRF97
 -----------------------------------------------
 For   37 Sites, RMS after 7 parameter transformation   4.4 mm  SIO wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    0.5    5.4     -5.8    5.1    -22.6   19.9  -2.744  0.279  SIO  CoM
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     4.8    1.5    5.2    2.8  -10.2    6.6  SIO wrt ITRF97
 MAS1    -4.9    1.3   -7.5    2.5   -4.1    5.5  SIO wrt ITRF97
 FORT     3.5    2.7    8.4    8.2  -31.5   13.0  SIO wrt ITRF97
 KOUR     2.9    2.9   17.8    9.2  -41.8   27.7  SIO wrt ITRF97
 BRMU     4.3    1.4    3.0    3.1    1.6    7.6  SIO wrt ITRF97
 THU1    -2.5    2.7    0.2    3.4   19.7   12.0  SIO wrt ITRF97
 SANT    -5.3    3.8    2.6    7.2  -21.8   13.2  SIO wrt ITRF97
 AREQ     1.2    3.1   -7.8    6.4  -27.9   13.7  SIO wrt ITRF97
 WES2    -0.6    1.3    7.5    2.8   11.2    6.4  SIO wrt ITRF97
 GODE     4.9    2.0    4.8    4.8    9.7    9.7  SIO wrt ITRF97
 ALGO     5.2    1.3    2.9    2.6   14.0    5.7  SIO wrt ITRF97
 NLIB     0.8    1.3   -2.0    2.9   22.4    6.8  SIO wrt ITRF97
 MDO1    -1.5    3.1   -4.6    8.8   18.3   19.7  SIO wrt ITRF97
 PIE1    -3.7    1.4   -1.4    3.1   21.5    7.1  SIO wrt ITRF97
 YELL     0.7    1.9   -1.9    3.4   12.6    7.6  SIO wrt ITRF97
 DRAO    -1.3    1.4   -4.2    2.8   11.7    5.9  SIO wrt ITRF97
 FAIR    -0.3    2.1    7.9    3.4  -16.3    7.5  SIO wrt ITRF97
 MAC1    -2.0    4.0   -3.5    7.3   12.0   13.0  SIO wrt ITRF97
 HOB2    -1.9    1.8   -2.3    3.2   11.5    6.5  SIO wrt ITRF97
 GUAM     3.5    2.2   -4.9    4.5    1.5    8.3  SIO wrt ITRF97
 TSKB     8.8    2.2   -5.7    3.4  -11.7   10.8  SIO wrt ITRF97
 PERT    -2.9    1.4   -2.0    3.0   -2.0    6.7  SIO wrt ITRF97
 YAR1    -3.5    1.6    2.5    3.7    3.4    8.7  SIO wrt ITRF97
 IRKT     2.8    2.1   -3.0    3.2   -0.7    6.5  SIO wrt ITRF97
 LHAS    -6.3    4.9   -5.9   13.2  -18.5   28.9  SIO wrt ITRF97
 DAV1     1.1    2.7    3.6    4.4    7.9    9.8  SIO wrt ITRF97
 KERG     0.6    2.0    0.0    3.4   -2.7    7.0  SIO wrt ITRF97
 MALI   -10.9    2.7   -3.1    8.9   33.1   15.2  SIO wrt ITRF97
 ZWEN     0.0    1.4    1.2    2.1  -18.4    4.5  SIO wrt ITRF97
 MATE    -1.7    1.4    3.6    2.4   -8.5    5.8  SIO wrt ITRF97
 GRAZ     2.5    1.5   -1.6    2.4   -7.3    6.1  SIO wrt ITRF97
 POTS    -0.1    1.3   -3.2    1.8   -5.2    4.6  SIO wrt ITRF97
 WTZR     2.1    1.2   -0.4    1.7   -4.2    4.0  SIO wrt ITRF97
 ONSA     1.9    1.3   -3.0    1.9  -14.3    4.2  SIO wrt ITRF97
 KOSG     1.4    1.4    1.9    2.2  -12.9    5.0  SIO wrt ITRF97
 Reference sites NOT used 
 
 CENTER NGS
 -------------------
 VARIANCE RESCALING FACTOR FOR NGS 245.5
 
 Transformation of loose solution NGS to ITRF97
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation  12.3 mm  NGS wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    3.5   14.3      3.8   15.0   -149.0   55.3  -1.796  0.820  NGS  CoM
 
 Adjustments to core site positions for NGS
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     3.0    4.0   -3.2    5.2  -21.7    9.1  NGS wrt ITRF97
 MAS1    -6.6    5.4  -15.2    7.5  -20.2   11.5  NGS wrt ITRF97
 KOUR    16.4   10.0    2.8   16.4   21.3   34.7  NGS wrt ITRF97
 BRMU     4.2    4.9    1.1    6.2   21.8   10.3  NGS wrt ITRF97
 THU1    -4.0    3.9   -4.2    4.2    4.9   11.8  NGS wrt ITRF97
 WES2    -2.0    3.7    8.4    5.1   22.9    8.8  NGS wrt ITRF97
 GODE     4.5    4.2    5.0    6.5   13.7   12.4  NGS wrt ITRF97
 ALGO     3.8    3.4    4.8    4.7   18.4    8.4  NGS wrt ITRF97
 NLIB    -0.5    3.5    1.2    4.5   17.8    9.8  NGS wrt ITRF97
 MDO1    -1.8    5.5    6.1   10.3    3.1   22.8  NGS wrt ITRF97
 PIE1    -4.7    4.2    8.0    5.5    6.8   11.8  NGS wrt ITRF97
 YELL    -3.2    3.3    1.1    4.4    2.9    9.1  NGS wrt ITRF97
 GOL2    -6.1    4.2   -7.5    6.0    5.0   12.3  NGS wrt ITRF97
 FAIR    -1.0    3.9   11.2    5.2  -31.2   10.3  NGS wrt ITRF97
 KOKB   -13.7    7.8   20.2   12.2  -20.9   17.6  NGS wrt ITRF97
 MAC1    17.3    6.2  -12.0    9.1    7.3   14.7  NGS wrt ITRF97
 HOB2    16.8    4.7   -9.6    7.8   25.9   14.7  NGS wrt ITRF97
 GUAM   -14.3    9.3    4.8   11.7  -13.6   18.5  NGS wrt ITRF97
 TSKB    -2.6    6.1   -0.4    7.6  -14.0   13.4  NGS wrt ITRF97
 PERT     5.1    5.0    0.8    7.4   28.2   14.0  NGS wrt ITRF97
 YAR1     2.9    5.7    1.8    8.3   20.8   15.7  NGS wrt ITRF97
 IRKT    -2.2    4.6   -6.0    5.6  -29.9   10.3  NGS wrt ITRF97
 LHAS   -15.5    9.0  -21.3   22.9  -47.9   37.5  NGS wrt ITRF97
 DAV1     5.2    7.7   18.1   11.0   14.7   15.7  NGS wrt ITRF97
 KERG    -1.0    5.8   14.0    9.7    4.1   12.5  NGS wrt ITRF97
 MALI   -11.8    7.5   10.5   14.4   53.7   17.4  NGS wrt ITRF97
 ZWEN    -5.3    3.2    2.7    4.3  -31.5    8.5  NGS wrt ITRF97
 TROM     7.6    2.8    3.0    3.1   -3.4    7.6  NGS wrt ITRF97
 MATE    -7.7    4.0    2.7    5.0  -24.1    9.9  NGS wrt ITRF97
 GRAZ    -1.3    3.5   -2.5    4.1  -23.9    8.5  NGS wrt ITRF97
 POTS    -2.9    3.1   -4.5    3.5  -27.3    7.6  NGS wrt ITRF97
 WTZR    -0.5    3.3   -2.5    3.8  -19.8    8.0  NGS wrt ITRF97
 ONSA     1.5    2.9   -4.2    3.3  -33.5    7.2  NGS wrt ITRF97
 NYAL     9.5    3.0    0.8    3.1   16.6    8.7  NGS wrt ITRF97
 KOSG     0.4    3.2    0.4    3.6  -27.6    7.5  NGS wrt ITRF97
 Reference sites NOT used 
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 30.776
 
 Transformation of loose solution ESA to ITRF97
 -----------------------------------------------
 For   30 Sites, RMS after 7 parameter transformation   5.5 mm  ESA wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    4.3    6.8    -32.5    6.8      1.9   15.3  -2.266  0.369  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     3.2    2.1    3.6    4.0  -12.5    7.5  ESA wrt ITRF97
 MAS1    -7.5    1.9   -8.2    3.7   -3.8    6.8  ESA wrt ITRF97
 FORT     5.6    3.7    2.1   12.7   32.8   18.0  ESA wrt ITRF97
 KOUR     3.1    4.2   13.7   16.2  -19.5   42.1  ESA wrt ITRF97
 BRMU     4.3    2.0    6.5    4.4    9.5    9.2  ESA wrt ITRF97
 THU1    -1.2    3.9   -0.6    4.7   -4.3   10.4  ESA wrt ITRF97
 SANT     2.0    4.8    3.2    9.2  -15.0   12.8  ESA wrt ITRF97
 AREQ     1.4    3.5    5.2    8.1  -28.4   16.5  ESA wrt ITRF97
 GODE     5.6    3.3    7.6    7.2    0.7   10.4  ESA wrt ITRF97
 ALGO     6.2    2.1    5.6    4.0   12.5    6.5  ESA wrt ITRF97
 YELL     2.1    3.9   -3.9    6.1    5.4    9.0  ESA wrt ITRF97
 GOL2    -6.8    2.7  -13.2    5.4   18.3    9.5  ESA wrt ITRF97
 DRAO    -0.3    2.2   -5.1    3.7    7.4    5.8  ESA wrt ITRF97
 FAIR     2.2    4.1    3.8    5.1  -32.5    9.6  ESA wrt ITRF97
 KOKB    -3.1    3.4   13.9    6.9   19.5   10.3  ESA wrt ITRF97
 HOB2     1.0    3.1    2.5    5.4   24.5   10.1  ESA wrt ITRF97
 GUAM    -1.7    3.3  -16.4    9.6   -4.1   14.1  ESA wrt ITRF97
 TSKB     8.4    2.9   -5.9    5.5    0.2   12.6  ESA wrt ITRF97
 PERT    -0.5    2.3    0.5    5.0   40.8    9.8  ESA wrt ITRF97
 YAR1    -1.8    2.2    5.7    4.9   30.5    8.1  ESA wrt ITRF97
 IRKT     7.9    2.7   -7.4    4.8   -4.4    7.4  ESA wrt ITRF97
 MALI    -5.4    4.1    8.1   13.3   29.4   24.7  ESA wrt ITRF97
 ZWEN     3.2    2.0   -1.9    3.0  -31.9    5.4  ESA wrt ITRF97
 TROM     6.7    3.6    3.3    4.6   -6.2   11.3  ESA wrt ITRF97
 MATE    -5.9   13.5    5.8   24.5  -15.8   37.4  ESA wrt ITRF97
 POTS    -1.6    1.8   -4.5    2.9  -25.0    5.3  ESA wrt ITRF97
 WTZR     1.9    1.9   -4.4    3.1   -8.9    5.6  ESA wrt ITRF97
 ONSA     1.6    1.9   -7.2    2.8  -25.0    5.4  ESA wrt ITRF97
 NYAL     7.1    4.0    1.8    3.9   13.1    9.3  ESA wrt ITRF97
 KOSG     0.0    1.9   -2.0    3.3  -10.2    6.1  ESA wrt ITRF97
 Reference sites NOT used 

 4.0 CENTER FITS TO COMBINED SOLUTION 
 CENTER EMR
 -------------------
 VARIANCE RESCALING FACTOR FOR EMR 22.98
 
 Transformation of loose solution EMR to COMB
 -----------------------------------------------
 For   29 Sites, RMS after 7 parameter transformation   6.8 mm  EMR wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
  -17.6   11.1     39.3   13.1    -77.9   46.4  -2.403  0.533  EMR  CoM
 
 Adjustments to core site positions for EMR
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -1.6    2.8   -0.5    4.6   -3.6   10.4  EMR wrt COMB
 MAS1    -3.2    2.8    5.1    4.9   -0.4   10.5  EMR wrt COMB
 BRMU    -2.1    2.6   -2.5    5.7   -2.2   11.3  EMR wrt COMB
 THU1     1.2    5.3   -2.2    7.1    2.3   20.1  EMR wrt COMB
 SANT     3.0    7.2   19.9   19.3   20.1   23.9  EMR wrt COMB
 AREQ    -1.7    5.0    9.7   10.8   22.4   23.8  EMR wrt COMB
 ALGO    -0.3    2.5    1.1    4.8    1.8    9.0  EMR wrt COMB
 YELL     2.7    3.8   -6.6    6.4    3.6   12.8  EMR wrt COMB
 GOL2     3.9    3.1    5.8    5.5    1.8   12.2  EMR wrt COMB
 DRAO     3.9    2.9   -2.6    4.4   -9.8    9.0  EMR wrt COMB
 FAIR    -1.3    3.6  -10.2    5.1   -5.3   11.1  EMR wrt COMB
 KOKB     0.0    4.0   14.6    7.3   10.4   15.0  EMR wrt COMB
 MAC1     2.9    4.2    3.5    7.0   11.2   13.2  EMR wrt COMB
 TID2     2.1    3.3    9.4    6.2    2.9   13.7  EMR wrt COMB
 HOB2     2.6    3.2    1.7    5.8   10.7   12.3  EMR wrt COMB
 GUAM    -5.4    4.2  -20.2   20.2   21.3   21.7  EMR wrt COMB
 TSKB    -6.6    4.0   14.7    7.3    8.2   16.4  EMR wrt COMB
 YAR1    10.5    3.5    5.8    8.5    9.1   17.4  EMR wrt COMB
 IRKT    -0.9    3.5   -3.5    7.4  -16.6   10.7  EMR wrt COMB
 DAV1     5.4    5.8   18.6    9.8   -2.4   18.5  EMR wrt COMB
 KERG     9.9    4.9  -22.2    7.9  -10.1   15.9  EMR wrt COMB
 MALI    -5.5    6.7    4.7   27.8  -15.5   46.1  EMR wrt COMB
 ZWEN     1.6    3.0    2.0    4.8  -13.5    8.8  EMR wrt COMB
 POTS     1.1    3.1   -0.5    4.8  -11.3   10.9  EMR wrt COMB
 WTZR     1.8    2.8    2.9    4.3  -13.3    8.8  EMR wrt COMB
 NYAL     2.7    5.3   -2.0    5.6  -11.6   17.8  EMR wrt COMB
 KOSG     0.8    4.4   -1.2    8.0  -14.6   20.3  EMR wrt COMB
 Reference sites NOT used 
 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 11.41
 
 Transformation of loose solution JPL to COMB
 -----------------------------------------------
 For   25 Sites, RMS after 7 parameter transformation   2.7 mm  JPL wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   14.5    8.0     -8.9    8.1     28.8    9.3  -2.549  0.328  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     3.0    1.7    0.5    1.9   -7.5    6.3  JPL wrt COMB
 FORT     1.6    3.4   -0.5    6.6   -4.2   14.7  JPL wrt COMB
 THU1    -4.1    4.7    0.3    3.8  -25.3   19.6  JPL wrt COMB
 SANT     3.6    4.0   -1.2    4.3   14.2   11.2  JPL wrt COMB
 AREQ    -0.5    4.0    6.4    4.9   21.9   19.1  JPL wrt COMB
 ALGO    -3.1    1.7   -0.7    1.7   -3.7    5.5  JPL wrt COMB
 MDO1    -0.6    5.2    6.5    7.5    2.3   21.3  JPL wrt COMB
 PIE1     0.0    2.0    4.3    2.4   -6.3    7.7  JPL wrt COMB
 YELL    -1.0    2.2    1.1    1.8    0.0    7.4  JPL wrt COMB
 GOL2    -0.4    1.9    2.9    3.0   -0.2    7.2  JPL wrt COMB
 FAIR    -0.5    2.0    1.4    1.7   -5.6    6.4  JPL wrt COMB
 KOKB    -4.4    2.1   -5.9    2.8   -0.2    7.1  JPL wrt COMB
 MAC1     5.4    2.7    1.2    2.8    6.2    8.9  JPL wrt COMB
 TID2     6.4    1.7    2.1    1.9    6.2    6.3  JPL wrt COMB
 HOB2     4.1    1.9    1.3    1.9    5.4    6.8  JPL wrt COMB
 GUAM    -2.4    4.7  -12.0   11.2   10.5   23.0  JPL wrt COMB
 TSKB    -4.5    2.1   -1.3    2.2   10.1    7.2  JPL wrt COMB
 PERT     2.2    3.9   -0.4    4.2    1.1   15.6  JPL wrt COMB
 YAR1     0.6    2.1   -1.4    2.3   -5.8    8.2  JPL wrt COMB
 IRKT    -1.7    2.0   -0.4    2.8   -1.5    6.2  JPL wrt COMB
 DAV1    -5.8    3.4   -6.1    3.3    4.6    9.9  JPL wrt COMB
 MALI     4.2    4.1   -3.4    7.1  -14.9   21.7  JPL wrt COMB
 MATE     0.7    2.0    2.2    2.0   -2.6    7.3  JPL wrt COMB
 WTZR     1.1    1.7    0.5    1.6   -3.6    5.5  JPL wrt COMB
 ONSA     1.1    1.8   -0.1    1.5   -1.4    5.4  JPL wrt COMB
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 113.8
 
 Transformation of loose solution GFZ to COMB
 -----------------------------------------------
 For   30 Sites, RMS after 7 parameter transformation   2.4 mm  GFZ wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -1.6    2.0     -1.7    1.9      4.5    1.2  -1.049  0.235  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -0.1    1.5    0.3    1.7   -0.3    5.4  GFZ wrt COMB
 FORT     2.3    2.8   -1.9    3.6    4.7   12.2  GFZ wrt COMB
 BRMU     2.0    1.5   -2.8    1.6    2.6    5.9  GFZ wrt COMB
 THU1    -2.9    1.8    0.6    1.6   -7.7    8.1  GFZ wrt COMB
 SANT     7.8    7.1    4.0    9.9    9.6   23.1  GFZ wrt COMB
 AREQ     3.5    2.5    0.4    2.7   16.4   10.8  GFZ wrt COMB
 WES2     0.6    1.5   -1.1    1.4    2.1    5.0  GFZ wrt COMB
 ALGO    -0.1    1.4   -1.3    1.3   -0.9    4.5  GFZ wrt COMB
 NLIB    -0.2    1.5    2.1    1.5    5.4    5.7  GFZ wrt COMB
 MDO1     1.9    3.5   -1.0    3.7    3.4   15.3  GFZ wrt COMB
 YELL    -1.5    1.6   -1.5    1.4   -3.9    5.2  GFZ wrt COMB
 GOL2     0.5    1.6   -1.5    1.8    3.7    6.2  GFZ wrt COMB
 DRAO    -1.7    1.4    0.4    1.4   -3.6    4.6  GFZ wrt COMB
 FAIR     1.2    2.9    2.7    3.5  -10.9    7.6  GFZ wrt COMB
 KOKB    -2.9    2.1    7.8    3.6   12.9    7.0  GFZ wrt COMB
 MAC1     3.3    1.8   -2.6    1.8   -3.3    5.6  GFZ wrt COMB
 TID2     4.9    1.5   -2.1    1.7    5.7    5.5  GFZ wrt COMB
 HOB2     3.9    1.6   -2.1    1.6    6.3    5.5  GFZ wrt COMB
 GUAM    -3.7    2.0    0.3    2.8    7.3    7.3  GFZ wrt COMB
 TSKB    -4.2    1.9    0.4    2.0    0.2    6.8  GFZ wrt COMB
 YAR1     0.3    2.0    0.2    2.1  -10.6    7.9  GFZ wrt COMB
 IRKT    -2.5    1.7   -2.1    1.5  -11.2    5.1  GFZ wrt COMB
 DAV1     2.4    2.3   -0.5    2.3   -6.3    6.8  GFZ wrt COMB
 MALI    10.2   10.2   -3.9   19.9   58.9   58.6  GFZ wrt COMB
 ZWEN    -3.5    1.4   -0.9    1.4   -3.7    4.4  GFZ wrt COMB
 MATE    -1.7    2.9    2.3    4.7   -1.8    7.8  GFZ wrt COMB
 POTS     0.9    1.4    0.9    1.2   -3.4    4.3  GFZ wrt COMB
 WTZR    -1.4    1.4    0.6    1.3   -2.9    4.4  GFZ wrt COMB
 ONSA    -1.8    1.4    0.5    1.2   -4.8    4.3  GFZ wrt COMB
 KOSG    -0.5    1.4   -0.9    1.3   -6.5    4.5  GFZ wrt COMB
 Reference sites NOT used 
 
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 69.63
 
 Transformation of loose solution COD to COMB
 -----------------------------------------------
 For   30 Sites, RMS after 7 parameter transformation   1.7 mm  COD wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
  -12.3    3.0    -15.0    2.9     14.3    4.8  -2.490  0.162  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.0    0.8   -0.6    0.8    0.8    3.7  COD wrt COMB
 MAS1    -1.4    0.9   -2.2    1.2   -1.9    3.4  COD wrt COMB
 BRMU    -1.2    0.9    2.2    1.3   -5.5    4.4  COD wrt COMB
 THU1     0.6    0.9   -0.8    1.0    3.5    4.4  COD wrt COMB
 WES2    -0.8    0.8    1.6    1.0   -8.6    3.5  COD wrt COMB
 GODE    -1.7    1.5    1.1    1.5  -10.4    7.5  COD wrt COMB
 ALGO    -0.8    0.8    1.5    0.9   -4.4    2.9  COD wrt COMB
 NLIB    -1.1    0.8   -0.1    0.8   -8.8    3.6  COD wrt COMB
 MDO1    -2.9    2.0   -0.8    2.1   -1.5   13.0  COD wrt COMB
 PIE1    -1.7    0.8   -0.9    1.0   -5.7    4.1  COD wrt COMB
 YELL     0.6    1.0   -0.1    0.9   -4.1    3.8  COD wrt COMB
 GOL2    -1.2    0.8   -1.1    1.0  -12.9    4.0  COD wrt COMB
 FAIR     0.7    1.0   -2.6    1.1    4.2    3.6  COD wrt COMB
 KOKB     0.3    1.2   -5.4    2.5   -5.7    4.6  COD wrt COMB
 TID2    -1.6    0.9    3.1    1.4   -0.9    3.7  COD wrt COMB
 HOB2    -1.3    1.0    3.1    1.3  -10.1    4.3  COD wrt COMB
 GUAM     1.4    1.4   -0.4    3.4   -9.3    5.5  COD wrt COMB
 TSKB     1.8    1.3   -1.8    1.6   -0.8    5.7  COD wrt COMB
 PERT    -1.4    0.8    0.7    1.2   -4.6    3.9  COD wrt COMB
 YAR1    -0.5    1.0    0.8    1.4   -2.2    5.0  COD wrt COMB
 IRKT     0.6    1.0   -0.3    1.1   12.9    3.4  COD wrt COMB
 DAV1    -1.2    1.7    0.4    2.5    2.1    4.9  COD wrt COMB
 KERG    -0.6    1.3    2.9    2.5    1.0    5.0  COD wrt COMB
 ZWEN     1.8    0.7    0.5    0.7   11.6    2.6  COD wrt COMB
 MATE     0.7    0.7   -0.2    0.7    5.3    3.7  COD wrt COMB
 GRAZ     0.8    0.7   -0.1    0.6    7.2    3.3  COD wrt COMB
 POTS     0.8    0.7   -0.3    0.6    8.2    2.5  COD wrt COMB
 WTZR     0.4    0.7   -0.3    0.6   10.1    2.7  COD wrt COMB
 ONSA     1.1    0.7    0.2    0.6    8.7    2.6  COD wrt COMB
 KOSG     0.6    0.7   -0.2    0.6    9.6    2.8  COD wrt COMB
 Reference sites NOT used 
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 1.672
 
 Transformation of loose solution SIO to COMB
 -----------------------------------------------
 For   37 Sites, RMS after 7 parameter transformation   2.6 mm  SIO wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    0.8    5.4     -5.5    5.2    -22.5   19.9  -2.445  0.279  SIO  CoM
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.1    1.5    0.2    2.7   -2.5    6.6  SIO wrt COMB
 MAS1     0.7    1.3    3.3    2.5    7.4    5.5  SIO wrt COMB
 FORT    -3.0    2.8    6.2    8.2  -31.2   13.0  SIO wrt COMB
 KOUR    -1.1    2.9    6.4    9.2  -32.3   27.7  SIO wrt COMB
 BRMU     2.1    1.4    3.0    3.0   -6.2    7.6  SIO wrt COMB
 THU1    -0.7    2.7    2.4    3.4    8.2   12.0  SIO wrt COMB
 SANT   -10.0    3.9   -4.3    7.5  -10.7   13.3  SIO wrt COMB
 WES2     2.2    1.3    1.2    2.8    3.5    6.4  SIO wrt COMB
 GODE     2.8    2.0    0.7    4.8    5.4    9.7  SIO wrt COMB
 ALGO     2.7    1.2   -0.7    2.5    2.2    5.7  SIO wrt COMB
 NLIB     2.6    1.3    1.7    2.9    7.7    6.8  SIO wrt COMB
 MDO1     2.4    3.1   -0.9    8.8   18.1   19.7  SIO wrt COMB
 PIE1     2.0    1.4   -1.7    3.0   13.0    7.1  SIO wrt COMB
 YELL     1.9    1.9   -0.1    3.3    3.6    7.5  SIO wrt COMB
 GOL2     1.3    1.5   -2.9    3.3   12.9    7.9  SIO wrt COMB
 DRAO     1.5    1.4   -1.0    2.7    4.2    5.9  SIO wrt COMB
 FAIR     1.0    2.1    3.6    3.4    0.0    7.5  SIO wrt COMB
 KOKB     0.7    2.0    5.3    3.4   -5.9    6.6  SIO wrt COMB
 MAC1     0.0    4.0    1.6    7.3   10.3   13.0  SIO wrt COMB
 TID2    -2.5    1.6   -2.6    3.2    7.2    6.9  SIO wrt COMB
 HOB2    -2.5    1.6   -2.5    3.0   10.0    6.4  SIO wrt COMB
 GUAM     0.5    2.2    1.6    4.5    5.6    8.3  SIO wrt COMB
 TSKB     2.2    2.2    0.2    3.5  -20.2   10.8  SIO wrt COMB
 PERT    -1.7    1.3   -3.4    2.9    2.5    6.7  SIO wrt COMB
 YAR1    -2.4    1.6   -2.4    3.7    5.6    8.6  SIO wrt COMB
 IRKT     3.0    2.2    0.8    3.2   -5.1    6.6  SIO wrt COMB
 LHAS    -1.7    4.9    6.5   13.2   -6.6   28.9  SIO wrt COMB
 DAV1     0.2    2.7    3.3    4.4   12.4    9.8  SIO wrt COMB
 KERG    -1.4    2.0    0.3    3.5   14.0    7.0  SIO wrt COMB
 MALI    -4.4    2.7   -5.3    9.0   -6.1   15.2  SIO wrt COMB
 ZWEN     1.6    1.4   -1.6    2.1   -9.3    4.5  SIO wrt COMB
 MATE     1.7    1.4    0.1    2.4   -6.7    5.8  SIO wrt COMB
 GRAZ     1.8    1.4   -1.2    2.4   -7.9    6.1  SIO wrt COMB
 POTS     1.4    1.2   -2.2    1.8   -1.6    4.6  SIO wrt COMB
 WTZR     1.4    1.2   -1.6    1.7   -8.4    4.0  SIO wrt COMB
 ONSA     0.9    1.3   -4.1    1.8   -4.7    4.2  SIO wrt COMB
 KOSG     1.2    1.4   -1.7    2.2   -9.9    5.0  SIO wrt COMB
 Reference sites NOT used 
 
 CENTER NGS
 -------------------
 VARIANCE RESCALING FACTOR FOR NGS 245.5
 
 Transformation of loose solution NGS to COMB
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation  10.5 mm  NGS wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    2.9   14.3      2.3   15.0   -147.3   55.3  -2.211  0.820  NGS  CoM
 
 Adjustments to core site positions for NGS
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -0.7    4.0   -7.4    5.2   -9.8    9.1  NGS wrt COMB
 MAS1    -1.1    5.4   -3.3    7.5   -4.5   11.5  NGS wrt COMB
 KOUR    11.3   10.0   -7.3   16.4   34.5   34.7  NGS wrt COMB
 BRMU     1.5    4.9    1.4    6.2   16.8   10.3  NGS wrt COMB
 THU1    -1.5    3.9   -2.4    4.2   -3.8   11.8  NGS wrt COMB
 WES2     0.4    3.7    2.0    5.1   17.7    8.8  NGS wrt COMB
 GODE     1.7    4.2    0.7    6.5   11.8   12.4  NGS wrt COMB
 ALGO     0.9    3.4    0.7    4.7    9.0    8.4  NGS wrt COMB
 NLIB     0.6    3.5    4.3    4.5    5.3    9.8  NGS wrt COMB
 MDO1     0.5    5.5    9.2   10.3    5.0   22.8  NGS wrt COMB
 PIE1    -0.4    4.2    6.9    5.5    0.4   11.8  NGS wrt COMB
 YELL    -2.3    3.3    1.7    4.4   -3.9    9.1  NGS wrt COMB
 GOL2    -2.0    4.2    5.5    6.0    0.4   12.3  NGS wrt COMB
 FAIR    -0.7    3.9    5.5    5.2  -12.4   10.3  NGS wrt COMB
 KOKB   -13.4    7.8    7.5   12.2  -24.4   17.6  NGS wrt COMB
 MAC1    17.0    6.2  -10.3    9.1   11.3   14.7  NGS wrt COMB
 TID2    10.6    5.2  -17.8    8.1   27.6   15.2  NGS wrt COMB
 HOB2    14.2    4.7  -13.3    7.8   30.1   14.7  NGS wrt COMB
 GUAM   -19.9    9.3    9.3   11.7   -5.1   18.5  NGS wrt COMB
 TSKB   -11.5    6.1    4.3    7.6  -18.5   13.4  NGS wrt COMB
 PERT     5.6    5.0   -3.7    7.4   39.0   14.0  NGS wrt COMB
 YAR1     3.2    5.7   -6.0    8.3   29.4   15.7  NGS wrt COMB
 IRKT    -3.8    4.6   -2.4    5.6  -30.0   10.3  NGS wrt COMB
 LHAS   -12.3    9.0   -9.3   22.9  -30.6   37.5  NGS wrt COMB
 DAV1     6.7    7.7   15.6   11.0   25.8   15.7  NGS wrt COMB
 KERG    -1.1    5.8   12.7    9.7   27.8   12.5  NGS wrt COMB
 MALI    -4.9    7.5    8.6   14.4   20.9   17.4  NGS wrt COMB
 ZWEN    -4.2    3.2    0.9    4.3  -18.2    8.5  NGS wrt COMB
 TROM     0.6    2.8   -1.8    3.1  -13.8    7.6  NGS wrt COMB
 MATE    -4.5    4.0    0.1    5.0  -17.7    9.9  NGS wrt COMB
 GRAZ    -2.3    3.5   -1.2    4.1  -20.1    8.5  NGS wrt COMB
 POTS    -1.5    3.1   -2.6    3.5  -19.5    7.6  NGS wrt COMB
 WTZR    -1.4    3.3   -2.8    3.8  -19.7    8.0  NGS wrt COMB
 ONSA     0.4    2.9   -4.4    3.3  -19.9    7.2  NGS wrt COMB
 NYAL     1.6    3.0   -2.0    3.1   -9.7    8.7  NGS wrt COMB
 KOSG     0.2    3.2   -2.3    3.6  -20.6    7.5  NGS wrt COMB
 Reference sites NOT used 
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 30.776
 
 Transformation of loose solution ESA to COMB
 -----------------------------------------------
 For   30 Sites, RMS after 7 parameter transformation   3.7 mm  ESA wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    4.7    6.8    -32.8    6.8      1.6   15.3  -2.502  0.364  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.9    2.1   -0.3    4.0   -1.3    7.5  ESA wrt COMB
 MAS1    -0.5    1.9    3.8    3.7   11.0    6.8  ESA wrt COMB
 FORT     0.4    3.7    1.1   12.7   36.0   18.0  ESA wrt COMB
 KOUR     0.1    4.2    3.3   16.2   -7.0   42.1  ESA wrt COMB
 BRMU     3.3    2.0    6.9    4.4    4.9    9.2  ESA wrt COMB
 THU1     1.6    3.9    1.0    4.7  -12.2   10.4  ESA wrt COMB
 SANT    -2.2    4.9   -2.5    9.2   -1.2   12.8  ESA wrt COMB
 AREQ    -1.7    3.6    1.7    8.0  -26.7   16.5  ESA wrt COMB
 GODE     4.5    3.3    3.6    7.2   -0.5   10.4  ESA wrt COMB
 ALGO     4.7    2.1    1.8    4.0    3.9    6.6  ESA wrt COMB
 YELL     3.7    3.9   -3.0    6.1   -0.2    9.0  ESA wrt COMB
 GOL2    -0.8    2.7    0.5    5.4   14.9    9.5  ESA wrt COMB
 DRAO     2.7    2.2   -2.4    3.7    3.3    5.8  ESA wrt COMB
 FAIR     3.1    4.2   -1.3    5.1  -12.5    9.6  ESA wrt COMB
 KOKB    -0.6    3.3    2.9    6.9   16.8   10.3  ESA wrt COMB
 TID2    -2.7    2.6    2.0    4.7   12.0    8.7  ESA wrt COMB
 HOB2     0.1    2.9    2.1    4.9   26.4   10.1  ESA wrt COMB
 GUAM    -5.3    3.2   -9.4    9.6    3.8   14.1  ESA wrt COMB
 TSKB     1.0    3.0    0.6    5.5   -4.3   12.6  ESA wrt COMB
 YAR1    -0.7    2.3    0.9    5.3   36.4    8.2  ESA wrt COMB
 IRKT     7.5    2.7   -2.5    4.8   -4.7    7.4  ESA wrt COMB
 MALI     2.3    4.2    7.1   13.2   -6.2   24.8  ESA wrt COMB
 ZWEN     5.5    2.0   -3.1    3.0  -19.0    5.4  ESA wrt COMB
 TROM     0.7    3.6   -1.3    4.6  -16.5   11.3  ESA wrt COMB
 MATE    -1.4   13.5    3.8   24.5  -10.3   37.4  ESA wrt COMB
 POTS     1.0    1.8   -2.2    2.8  -17.7    5.3  ESA wrt COMB
 WTZR     2.2    1.9   -4.3    3.1   -9.4    5.6  ESA wrt COMB
 ONSA     1.7    1.9   -7.1    2.8  -11.7    5.4  ESA wrt COMB
 NYAL    -0.2    4.0   -1.1    3.9  -12.6    9.3  ESA wrt COMB
 KOSG     1.0    1.9   -4.4    3.2   -3.6    6.1  ESA 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)
51489.50   24445  379927  4227526  13444    61    66   66667      50 148 40  0     12   -684     62     63    -.059   .000   .000
51490.50   24638  379043  4214302  13012    58    63   66667      43 148 40  0    375  -1084     46     46    -.060   .000   .000
51491.50   25254  378096  4201344  12900    58    63   66667      42 148 40  0    856   -808     44     45    -.058   .000   .000
51492.50   26249  377278  4188855  12081    58    63   66667      42 148 40  0   1134   -828     46     46    -.059   .000   .000
51493.50   27366  376736  4177225  11229    59    63   66667      43 148 40  0   1099   -258     45     46    -.061   .000   .000
51494.50   28179  376849  4166175  10963    59    64   66667      44 148 40  0    528    484     48     49    -.060   .000   .000
51495.50   28809  377418  4154836  11791    61    66   66667      54 148 40  0    731    655     64     66    -.058   .000   .000

[Mailed From: Tom Herring <[email-masked]>]