Subject: [IGSREPORT-6145] Wk 1010 MIT T2 Analysis Report
From: Thomas Herring
Date: Mon, 7 Jun 1999 11:38:04 PDT

******************************************************************************
IGS Electronic Report    Mon Jun  7 11:38:04 PDT 1999      Message Number 6145
******************************************************************************

Author: Thomas Herring
Subject: Wk 1010 MIT T2 Analysis Report

********************************************************************************
MIT ANALYSIS REPORT GPS-WEEK 1010    Dates: 99may16  to  99may22 
********************************************************************************

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
   MIT1010g.SNX   Combined sinex file from all available analysis centers
   MIT1010g.SUM   Name of this summary file
   MIT1010g.RES   File of the individual AC position estimates residuals 
                  to the combined solution for the week. 

0.0 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    118    1.5    1.6     1.4    1.3     5.5    1.6  
 JPL     56    3.5    1.5     2.1     .9    10.1    1.2  
 SIO    127    2.0    1.4     3.6    1.3     6.5    1.1  
 EMR     44    6.3    2.0     7.9    1.4     9.8     .8  
 ESA     61    4.1    1.7     5.5    1.2    11.3    1.5  
 GFZ     66    2.3    1.7     1.8    1.4     7.5    1.6  
 NGS     72    2.9    1.1     3.9    1.0     7.3    1.0  
 
CENTER SINEX ERRORS: (corrected during processing).
 CNT  Site Type of Error           Used values                       IGS.SNX values
 NRC  GOUG Eccentricity: Used          .0000   .0000   .0380 Real   .0000   .0000   .0030  m
 NRC  NYAL Eccentricity: Used          .0000   .0000  5.2159 Real   .0000   .0000  5.2160  m
 NRC  ONSA Eccentricity: Used          .0000   .0000   .9949 Real   .0000   .0000   .9950  m
 COM  REYK Eccentricity: Used          .0000   .0000   .0685 Real   .0000   .0000   .0680  m
 COM  SUTH Eccentricity: Used          .0000   .0000   .1190 Real   .0000   .0000   .0840  m
 COM  GOUG Eccentricity: Used          .0000   .0000   .0380 Real   .0000   .0000   .0030  m
 NOA  SUTH Eccentricity: Used          .0000   .0000   .1190 Real   .0000   .0000   .0840  m
 NOA  TIXI Used ASHTECH CHOKE RI dL1   .0003   .0001   .1080  dL2   .0006   .0017   .1282  m
 NOA  TIXI Real DORNE MARGOLIN A dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 NOA  WUHN Eccentricity: Used          .0000   .0000  2.3550 Real   .0000   .0000  2.3200  m
 JPL  BARB Used ASHTECH CHOKERIN dL1   .0000   .0000   .0000  dL2   .0000   .0000   .0000  m
 JPL  BARB Real ASHTECH CHOKERIN dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  MDVO Used EXT. L1/L2 KINEM dL1   .0000   .0000   .0000  dL2   .0000   .0000   .0000  m
 JPL  MDVO Real 4000ST L1/L2 GEO dL1   .0000  -.0030   .0780  dL2  -.0031  -.0013   .0744  m
 JPL  VESL Eccentricity: Used          .0000   .0000   .0238 Real   .0000   .0000  -.0112  m
 JPL  GOUG Eccentricity: Used          .0000   .0000   .0380 Real   .0000   .0000   .0030  m
 SIO  SUTH Eccentricity: Used          .0000   .0000   .1190 Real   .0000   .0000   .0840  m
 ESA  MDVO Eccentricity: Used          .0000   .0000   .1460 Real   .0000   .0000   .1456  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 ITRF96, the
heights are given a variance 10 times larger than the horizontal coordinates.
The same variance ratio is used when the RMS to ITRF96 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 ITRF96, 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 ITRF96.
The result of this is that the combined solution has the same center
of mass position and scale as ITRF96, and therefore when each of the
centers are compared to the combined solution, they generate very similar
translations and scales as they do the ITRF96.  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 ITRF96
 -----------------------------------------------
 For   42 Sites, RMS after 7 parameter transformation   4.1 mm  COMBINED wrt ITRF96 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    3.6    0.7      0.4    0.8      3.0    0.6  -0.712  0.080  COMBINED  CoM
 
 Adjustments to core site positions for COMBINED
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.0    0.4    3.2    0.6  -12.2    1.8  COMBINED wrt ITRF96
 FORT     0.4    0.7   -7.8    1.4   -1.2    3.2  COMBINED wrt ITRF96
 BRAZ    18.8   11.5  -11.7   36.8   73.9   40.6  COMBINED wrt ITRF96
 KOUR     2.3    0.7   -8.2    1.7    0.1    4.4  COMBINED wrt ITRF96
 OHIG     0.9    4.4    6.0    7.8   17.0   18.2  COMBINED wrt ITRF96
 BRMU    -3.1    0.4    1.1    0.6    0.0    2.0  COMBINED wrt ITRF96
 THU1    -7.1    0.4    5.2    0.5   12.8    2.1  COMBINED wrt ITRF96
 SANT    11.7    0.8    1.5    1.0  -10.3    2.3  COMBINED wrt ITRF96
 AREQ     8.8    0.7   -2.6    1.1    5.6    2.6  COMBINED wrt ITRF96
 WES2    -3.6    0.4    3.2    0.5   11.1    1.7  COMBINED wrt ITRF96
 ALGO    -2.9    0.4    2.4    0.5   12.7    1.5  COMBINED wrt ITRF96
 NLIB    -1.4    0.4    2.8    0.5   12.0    2.0  COMBINED wrt ITRF96
 MDO1     4.2    0.4    1.6    0.6   -5.9    2.1  COMBINED wrt ITRF96
 PIE1     1.6    0.5    2.7    0.6    9.1    2.3  COMBINED wrt ITRF96
 YELL    -1.1    0.4    1.6    0.4    0.6    1.6  COMBINED wrt ITRF96
 GOLD    -2.6    0.5   -6.1    0.6   -1.6    2.1  COMBINED wrt ITRF96
 GOL2    -0.8    0.6   -0.4    0.8    7.2    2.5  COMBINED wrt ITRF96
 DRAO    -1.4    0.4    1.1    0.5   -4.5    1.6  COMBINED wrt ITRF96
 FAIR     0.8    0.5    4.5    0.6  -16.6    2.0  COMBINED wrt ITRF96
 KOKB    -1.6    0.7   -2.8    1.1   14.6    2.9  COMBINED wrt ITRF96
 TIDB     2.9    0.6   -8.0    0.8    9.2    2.2  COMBINED wrt ITRF96
 TID2     3.9    0.7   -6.1    0.9   18.0    2.8  COMBINED wrt ITRF96
 HOB2     2.1    0.6   -8.7    0.7    9.2    1.9  COMBINED wrt ITRF96
 GUAM    -4.9    0.7    4.5    1.2   10.8    3.5  COMBINED wrt ITRF96
 TSKB     2.6    0.5   -4.8    0.7   13.1    2.0  COMBINED wrt ITRF96
 SHAO    -1.2    0.6    3.4    0.9    0.1    2.6  COMBINED wrt ITRF96
 PERT     2.6    0.6   -2.9    0.8    2.8    2.3  COMBINED wrt ITRF96
 YAR1    -1.2    0.5   -0.2    0.8   -0.5    2.1  COMBINED wrt ITRF96
 IRKT    -3.8    0.5    2.2    0.6   -4.0    1.8  COMBINED wrt ITRF96
 LHAS    -8.0    0.6    9.0    1.0    1.4    2.8  COMBINED wrt ITRF96
 KIT3     1.7    0.5   -3.1    0.8  -18.2    2.5  COMBINED wrt ITRF96
 MALI     5.0    0.9    4.1    1.5  -15.3    3.5  COMBINED wrt ITRF96
 ZWEN    -1.4    0.4    8.3    0.5  -16.6    1.6  COMBINED wrt ITRF96
 TROM    -1.6    1.0    4.0    1.6   -4.8    4.0  COMBINED wrt ITRF96
 MATE    -0.7    0.5   -2.2    0.6  -12.1    2.2  COMBINED wrt ITRF96
 GRAZ    -0.1    0.4   -0.3    0.5  -23.8    2.1  COMBINED wrt ITRF96
 POTS    -0.8    0.4   -2.0    0.5  -25.4    1.8  COMBINED wrt ITRF96
 WTZR     1.5    0.4    0.3    0.5   -7.1    1.6  COMBINED wrt ITRF96
 ONSA     1.5    0.4   -0.4    0.5   -9.9    1.7  COMBINED wrt ITRF96
 NYAL     0.4    1.0   -2.9    1.4   25.4    4.7  COMBINED wrt ITRF96
 KOSG    -1.5    0.4    1.4    0.5  -12.7    1.6  COMBINED wrt ITRF96
 Reference sites NOT used 
 MADR   -13.3    1.1   40.0    2.3  -28.0    5.4  COMBINED wrt ITRF96

 3.0 CENTER FITS TO ITRF 1996
 CENTER EMR
 -------------------
 VARIANCE RESCALING FACTOR FOR EMR 21.48
 
 Transformation of loose solution EMR to ITRF96
 -----------------------------------------------
 For   26 Sites, RMS after 7 parameter transformation   7.8 mm  EMR wrt ITRF96 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   17.7   10.2     63.8   12.3   -201.7   45.3  -1.274  0.451  EMR  CoM
 
 Adjustments to core site positions for EMR
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     3.3    2.6   -4.1    4.3   -6.1    9.4  EMR wrt ITRF96
 OHIG    -8.0    5.6   14.3    8.3   43.4   18.8  EMR wrt ITRF96
 BRMU     5.2    2.4   -2.0    4.7   -3.4    9.4  EMR wrt ITRF96
 THU1    -5.7    2.5   12.5    2.9   19.3   10.5  EMR wrt ITRF96
 SANT     1.1    3.8   10.9    8.6   -5.6   12.2  EMR wrt ITRF96
 AREQ     3.5    3.2    7.9    6.1   -1.8   12.6  EMR wrt ITRF96
 ALGO     8.1    2.3    2.1    4.0   16.3    8.4  EMR wrt ITRF96
 YELL     9.3    2.5   -3.6    3.8   -1.3    8.7  EMR wrt ITRF96
 GOLD     8.4    2.5  -13.9    4.6   -7.6    9.7  EMR wrt ITRF96
 DRAO     8.0    2.3   -6.2    3.9   -3.0    8.2  EMR wrt ITRF96
 FAIR     7.2    2.6   -8.7    4.3  -20.1   10.1  EMR wrt ITRF96
 KOKB    -1.5    3.5    4.9    7.6   -4.0   18.7  EMR wrt ITRF96
 MAC1    -2.0    3.9  -21.9    6.3   25.7   12.7  EMR wrt ITRF96
 TIDB    -4.5    3.3    6.4    6.3   19.8   12.8  EMR wrt ITRF96
 GUAM    -8.5    3.8   20.4    9.0   -2.7   21.3  EMR wrt ITRF96
 TSKB     4.5    3.3    7.4    5.6   15.2   12.7  EMR wrt ITRF96
 YAR1    -6.4    3.1    2.2    6.7    3.0   13.0  EMR wrt ITRF96
 IRKT     3.5    3.4    1.0    6.1  -16.1   11.1  EMR wrt ITRF96
 DAV1    19.0    5.0   22.5    7.9   20.0   17.2  EMR wrt ITRF96
 MALI    -0.4    4.9  -18.8   14.0  -14.3   22.2  EMR wrt ITRF96
 ZWEN    -4.1    2.7   -2.3    4.8  -17.3    8.6  EMR wrt ITRF96
 WTZR    -0.2    2.7   -6.7    4.3   -8.4    9.3  EMR wrt ITRF96
 ONSA    -2.1    2.8   -3.7    4.4   -5.5   10.6  EMR wrt ITRF96
 NYAL    -8.4    3.0   -4.9    4.0   10.6   13.3  EMR wrt ITRF96
 Reference sites NOT used 
 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 11.43
 
 Transformation of loose solution JPL to ITRF96
 -----------------------------------------------
 For   21 Sites, RMS after 7 parameter transformation   5.3 mm  JPL wrt ITRF96 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
  -16.4    8.4      8.7    8.2    -35.4    9.2  -0.980  0.282  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 FORT     5.2    2.1  -13.1    3.1   -0.3    8.5  JPL wrt ITRF96
 KOUR     1.4    4.4  -12.1    6.0   21.4   20.9  JPL wrt ITRF96
 SANT    14.8    2.4   -0.1    2.9   -5.9    7.7  JPL wrt ITRF96
 AREQ    14.3    4.1    4.8    5.3   11.5   17.4  JPL wrt ITRF96
 ALGO    -4.2    1.7    6.4    1.7    6.9    5.7  JPL wrt ITRF96
 YELL    -2.1    1.7    3.7    1.5   -7.5    5.3  JPL wrt ITRF96
 GOL2    -0.4    1.6    1.4    1.9   -0.4    6.0  JPL wrt ITRF96
 FAIR     1.7    1.9    1.5    2.3  -24.3    6.6  JPL wrt ITRF96
 KOKB    -5.4    1.9    2.0    2.4   13.5    8.1  JPL wrt ITRF96
 KWJ1   -11.2    2.0   16.4    2.4    3.9    8.6  JPL wrt ITRF96
 TID2     6.1    1.8   -5.1    1.7   10.0    6.1  JPL wrt ITRF96
 HOB2     5.5    1.9   -7.3    1.7    3.2    6.0  JPL wrt ITRF96
 GUAM    -6.1    1.9    3.2    2.2    9.5    8.0  JPL wrt ITRF96
 TSKB    -0.6    1.7   -6.6    1.6   16.6    5.8  JPL wrt ITRF96
 YAR1    -0.7    1.7   -3.7    2.0  -17.6    6.5  JPL wrt ITRF96
 IRKT    -7.7    1.8    0.0    1.6   -2.4    5.8  JPL wrt ITRF96
 KIT3    -3.8    2.4   -4.5    2.4  -12.6    9.3  JPL wrt ITRF96
 MALI     3.4    2.5    6.5    3.8    4.3   10.0  JPL wrt ITRF96
 WTZR    -5.5    1.9   -0.1    2.0   -5.0    6.2  JPL wrt ITRF96
 ONSA    -2.3    2.2   -1.0    2.0  -12.2    6.8  JPL wrt ITRF96
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 84.1
 
 Transformation of loose solution GFZ to ITRF96
 -----------------------------------------------
 For   32 Sites, RMS after 7 parameter transformation   4.7 mm  GFZ wrt ITRF96 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    2.0    1.3     -2.4    1.2      1.3    0.9  -0.112  0.148  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.1    1.1    2.5    1.1   -2.5    3.8  GFZ wrt ITRF96
 FORT     5.0    1.3   -9.8    1.9   -2.9    6.4  GFZ wrt ITRF96
 KOUR     3.7    1.8  -13.3    2.4   11.1    9.0  GFZ wrt ITRF96
 BRMU    -1.9    1.0   -0.5    1.1    5.2    4.2  GFZ wrt ITRF96
 THU1    -6.2    1.0    4.3    0.9    7.1    4.6  GFZ wrt ITRF96
 SANT    16.5    1.5    1.7    1.5   -6.0    5.0  GFZ wrt ITRF96
 AREQ    15.4    1.3   -1.5    1.4   14.1    5.0  GFZ wrt ITRF96
 WES2    -3.5    1.0    2.1    0.9   13.6    3.6  GFZ wrt ITRF96
 ALGO    -4.0    1.1    0.7    0.9   14.9    3.6  GFZ wrt ITRF96
 NLIB    -0.8    1.1    3.5    1.0    9.1    4.2  GFZ wrt ITRF96
 MDO1     2.3    1.0    1.9    1.1  -18.6    4.3  GFZ wrt ITRF96
 YELL    -2.7    1.2    2.9    0.9   -5.2    3.7  GFZ wrt ITRF96
 GOL2    -1.3    1.0    2.4    1.1   -1.6    4.0  GFZ wrt ITRF96
 DRAO    -2.8    1.1    4.0    1.0  -13.8    3.5  GFZ wrt ITRF96
 FAIR     2.5    1.3    6.1    1.0  -25.6    4.5  GFZ wrt ITRF96
 KOKB    -5.7    1.4   -1.8    2.3   12.0    6.3  GFZ wrt ITRF96
 KWJ1   -11.8    1.5   12.5    2.2    7.7    7.0  GFZ wrt ITRF96
 TID2     6.2    1.3   -4.6    1.6   19.0    4.6  GFZ wrt ITRF96
 HOB2     6.4    1.4   -6.5    1.5   11.4    4.6  GFZ wrt ITRF96
 GUAM    -7.0    1.4   -1.3    1.9   22.1    6.6  GFZ wrt ITRF96
 TSKB    -2.0    1.2   -8.2    1.3   13.1    4.6  GFZ wrt ITRF96
 IRKT    -5.6    1.3   -1.9    1.1   -7.0    4.0  GFZ wrt ITRF96
 LHAS   -11.5    1.3    4.7    1.4    3.8    5.0  GFZ wrt ITRF96
 KIT3    -1.4    1.4   -5.4    1.4  -13.5    5.5  GFZ wrt ITRF96
 MALI     7.1    1.7    5.9    2.2   -1.4    7.2  GFZ wrt ITRF96
 ZWEN    -2.8    1.1    7.0    0.9  -11.7    3.6  GFZ wrt ITRF96
 MATE    -1.2    1.2   -3.1    1.1   -3.7    4.3  GFZ wrt ITRF96
 POTS    -0.3    1.2   -2.7    0.9  -20.7    4.0  GFZ wrt ITRF96
 WTZR     0.6    1.2   -0.8    1.0    1.3    4.0  GFZ wrt ITRF96
 ONSA     2.7    1.4   -0.5    1.1   -3.0    4.5  GFZ wrt ITRF96
 KOSG    -1.9    1.2   -0.3    1.0   -7.1    3.8  GFZ wrt ITRF96
 Reference sites NOT used 
 
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 59.4
 
 Transformation of loose solution COD to ITRF96
 -----------------------------------------------
 For   36 Sites, RMS after 7 parameter transformation   4.0 mm  COD wrt ITRF96 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -1.3    2.6     -3.8    2.5     -8.0    4.0  -1.810  0.134  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.5    0.8    2.8    0.9  -14.8    3.1  COD wrt ITRF96
 FORT    -2.5    1.6  -10.2    5.2   -2.6    7.6  COD wrt ITRF96
 KOUR    -6.6    3.2   -6.1    5.2    0.3   28.0  COD wrt ITRF96
 BRMU    -4.8    0.7    2.8    1.1   -7.1    3.6  COD wrt ITRF96
 THU1    -5.1    0.7    5.7    0.9   22.3    3.4  COD wrt ITRF96
 SANT     9.1    1.6    1.2    2.2  -10.7    4.1  COD wrt ITRF96
 AREQ     4.4    1.3   -4.4    2.4    1.8    4.8  COD wrt ITRF96
 WES2    -4.4    0.7    4.2    0.9    7.1    2.6  COD wrt ITRF96
 ALGO    -3.3    0.7    3.2    0.8   11.0    2.6  COD wrt ITRF96
 NLIB    -1.5    0.7    2.4    0.8   10.5    3.1  COD wrt ITRF96
 MDO1     3.2    0.8    0.2    0.9    3.0    3.6  COD wrt ITRF96
 PIE1     1.0    0.7    0.9    0.9   17.8    3.3  COD wrt ITRF96
 YELL    -0.3    0.7    0.4    0.7    7.0    2.5  COD wrt ITRF96
 GOLD    -2.6    0.8   -8.6    0.9    3.0    3.1  COD wrt ITRF96
 DRAO    -1.5    0.7   -1.2    0.8    2.0    2.6  COD wrt ITRF96
 FAIR     0.4    0.9    3.4    1.0   -4.9    3.5  COD wrt ITRF96
 KOKB     0.9    1.5   -5.1    2.5   16.7    8.8  COD wrt ITRF96
 TIDB     0.8    1.0   -4.8    1.5    0.6    3.2  COD wrt ITRF96
 HOB2    -1.1    1.2   -6.0    1.4   -1.1    3.2  COD wrt ITRF96
 GUAM    -2.2    1.7    5.2    4.5   19.6   10.2  COD wrt ITRF96
 TSKB     3.5    1.1   -7.3    1.7   25.0    3.8  COD wrt ITRF96
 SHAO    -0.2    1.1    1.8    1.7   14.1    4.4  COD wrt ITRF96
 PERT     0.1    1.0   -4.7    1.5   -5.9    3.7  COD wrt ITRF96
 YAR1    -3.4    1.0   -1.8    1.5   -3.7    3.5  COD wrt ITRF96
 IRKT    -3.7    0.9    2.4    1.1    9.0    3.0  COD wrt ITRF96
 LHAS    -5.7    1.1    8.3    1.9   11.4    4.7  COD wrt ITRF96
 KIT3     3.3    1.0   -4.0    1.4  -13.3    5.7  COD wrt ITRF96
 MALI     7.9    1.8    2.9    4.7  -36.0    7.3  COD wrt ITRF96
 ZWEN    -1.1    0.7    9.1    0.8  -12.7    2.8  COD wrt ITRF96
 MATE     0.5    0.8   -1.9    0.9  -13.3    3.7  COD wrt ITRF96
 GRAZ     0.9    0.7    0.0    0.8  -21.4    2.9  COD wrt ITRF96
 POTS    -0.3    0.7   -1.6    0.7  -20.2    3.3  COD wrt ITRF96
 WTZR     2.0    0.7    0.6    0.8   -8.0    3.0  COD wrt ITRF96
 ONSA     1.7    0.8    0.3    0.7   -7.5    2.9  COD wrt ITRF96
 KOSG    -1.3    0.7    1.7    0.8   -7.7    2.7  COD wrt ITRF96
 Reference sites NOT used 
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 2.006
 
 Transformation of loose solution SIO to ITRF96
 -----------------------------------------------
 For   37 Sites, RMS after 7 parameter transformation   4.5 mm  SIO wrt ITRF96 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   16.9    5.7     -0.7    5.9   -120.8   19.8  -1.085  0.219  SIO  CoM
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -1.8    1.3    6.0    2.2  -14.5    5.0  SIO wrt ITRF96
 FORT    -3.8    1.9   -5.9    4.7   -5.6    7.7  SIO wrt ITRF96
 KOUR     0.8    1.8   -0.9    4.7   -0.2    9.5  SIO wrt ITRF96
 BRMU    -3.3    1.1    5.4    2.6    2.7    5.2  SIO wrt ITRF96
 THU1    -9.8    1.5    4.6    1.9   15.9    7.2  SIO wrt ITRF96
 SANT    15.7    2.6   -4.1    4.4    9.1    7.3  SIO wrt ITRF96
 AREQ     9.4    2.1   -4.7    4.5   17.9    7.9  SIO wrt ITRF96
 WES2    -3.0    1.1    5.6    2.2   15.8    4.7  SIO wrt ITRF96
 GODE    -5.5    1.5   16.3    3.4   17.0    8.4  SIO wrt ITRF96
 ALGO    -1.7    1.0    5.5    1.7   14.1    3.5  SIO wrt ITRF96
 NLIB    -0.1    1.2    3.5    2.3   14.3    5.1  SIO wrt ITRF96
 MDO1     5.9    1.2   -4.2    2.5  -13.7    5.8  SIO wrt ITRF96
 PIE1     3.6    1.2   -3.2    2.5   -2.2    5.4  SIO wrt ITRF96
 YELL     0.7    1.3    1.4    2.2    2.1    5.0  SIO wrt ITRF96
 GOL2     0.1    1.1   -5.9    2.1   11.1    4.2  SIO wrt ITRF96
 DRAO     1.4    1.1   -2.9    1.9   -5.5    3.5  SIO wrt ITRF96
 FAIR     2.5    1.5    1.2    2.4  -15.7    5.6  SIO wrt ITRF96
 KOKB    -2.5    1.7  -11.7    2.9    8.2    5.7  SIO wrt ITRF96
 KWJ1    -7.3    1.9   16.3    4.2  -20.2    9.0  SIO wrt ITRF96
 TID2     1.7    1.5   -8.6    2.8   29.8    5.6  SIO wrt ITRF96
 HOB2     0.8    1.7   -8.6    2.7   26.0    5.3  SIO wrt ITRF96
 GUAM    -5.1    1.6    2.5    3.8    7.7    8.4  SIO wrt ITRF96
 TSKB     6.7    1.6   -5.1    2.7    0.2    7.7  SIO wrt ITRF96
 SHAO     3.7    1.6    7.2    3.0   -0.7    6.0  SIO wrt ITRF96
 PERT     3.6    1.4   -6.6    2.8   19.1    5.7  SIO wrt ITRF96
 YAR1    -0.4    1.3   -5.8    2.9    6.7    5.6  SIO wrt ITRF96
 IRKT     1.1    1.8    4.0    2.5   -6.6    5.2  SIO wrt ITRF96
 LHAS    -4.1    1.6   11.4    3.4   -1.9    7.1  SIO wrt ITRF96
 KIT3     6.1    1.3   -1.0    2.4  -19.6    4.4  SIO wrt ITRF96
 MALI     2.3    2.6    2.8    6.8  -13.1   10.5  SIO wrt ITRF96
 ZWEN     1.1    1.2    7.4    2.2  -13.0    4.7  SIO wrt ITRF96
 MATE    -2.0    1.3   -1.4    2.4   -9.3    5.4  SIO wrt ITRF96
 GRAZ    -0.7    1.2   -0.1    2.2  -22.9    5.7  SIO wrt ITRF96
 POTS    -0.5    1.1   -2.7    1.8  -25.2    4.0  SIO wrt ITRF96
 WTZR     1.9    1.1   -1.5    1.7   -2.5    3.6  SIO wrt ITRF96
 ONSA     1.7    1.2   -3.3    1.8   -4.8    4.3  SIO wrt ITRF96
 KOSG    -1.0    1.1    1.2    1.9  -16.6    3.9  SIO wrt ITRF96
 Reference sites NOT used 
 
 CENTER NGS
 -------------------
 VARIANCE RESCALING FACTOR FOR NGS 125.2
 
 Transformation of loose solution NGS to ITRF96
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation   4.9 mm  NGS wrt ITRF96 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   15.7    9.0      0.3    9.7    -90.9   34.1  -0.102  0.458  NGS  CoM
 
 Adjustments to core site positions for NGS
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -1.1    2.1    4.7    3.3  -10.0    5.9  NGS wrt ITRF96
 FORT     7.8    5.7    3.3   12.3   -0.1   15.4  NGS wrt ITRF96
 KOUR     8.1    4.3    6.7    7.2    4.3   10.5  NGS wrt ITRF96
 BRMU     0.3    1.8    0.1    3.4    8.6    5.8  NGS wrt ITRF96
 THU1    -9.6    2.1    2.8    2.0   20.8    5.7  NGS wrt ITRF96
 WES2    -0.1    1.7    1.2    2.9   18.3    4.9  NGS wrt ITRF96
 GODE    -0.2    2.0   11.6    4.1   30.9    9.7  NGS wrt ITRF96
 ALGO     0.9    1.7    0.1    2.7   17.4    4.8  NGS wrt ITRF96
 NLIB     0.3    1.5   -0.5    2.6   17.1    5.5  NGS wrt ITRF96
 MDO1     5.9    2.0    0.3    3.2   -2.3    6.8  NGS wrt ITRF96
 PIE1     2.7    1.8    1.3    3.1    6.4    6.3  NGS wrt ITRF96
 YELL    -1.2    1.8   -0.2    2.6    4.9    4.9  NGS wrt ITRF96
 GOLD    -2.4    2.0   -7.7    3.3   -1.1    6.2  NGS wrt ITRF96
 DRAO    -1.5    1.7   -0.1    2.9   -3.1    5.2  NGS wrt ITRF96
 FAIR    -1.3    2.0    2.0    3.2  -11.3    5.9  NGS wrt ITRF96
 KOKB    -3.1    4.3  -13.7    7.3    8.6   10.5  NGS wrt ITRF96
 KWJ1    -4.2    4.9    7.1   10.2   -3.9   16.7  NGS wrt ITRF96
 TIDB     7.2    2.8   -4.0    5.6   21.1    7.9  NGS wrt ITRF96
 HOB2     5.0    3.5   -3.2    5.9   10.5    8.4  NGS wrt ITRF96
 GUAM    -7.3    3.7    6.6    6.5   -8.1   10.3  NGS wrt ITRF96
 TSKB     0.7    3.0   -2.6    4.3    8.3    5.6  NGS wrt ITRF96
 SHAO    -2.8    3.0    9.0    4.3   -8.3    5.8  NGS wrt ITRF96
 PERT     3.4    2.6   -4.7    5.2    9.7    7.0  NGS wrt ITRF96
 YAR1    -0.6    2.5   -4.5    5.3    0.1    7.0  NGS wrt ITRF96
 IRKT    -3.6    2.7    5.1    3.3  -18.2    5.5  NGS wrt ITRF96
 LHAS    -9.9    3.2   10.2    5.0  -12.8    8.3  NGS wrt ITRF96
 KIT3     0.0    2.9   -2.7    5.0  -18.7    9.2  NGS wrt ITRF96
 MALI    -6.5    4.8    1.1    9.9  -30.4   10.0  NGS wrt ITRF96
 ZWEN    -0.6    1.7    3.2    2.6  -17.6    5.0  NGS wrt ITRF96
 TROM    -1.2    1.6    0.3    2.1   -4.3    5.1  NGS wrt ITRF96
 MATE    -4.0    2.1   -7.1    3.2  -13.7    6.1  NGS wrt ITRF96
 GRAZ    -2.8    1.8   -3.8    2.7  -21.2    5.1  NGS wrt ITRF96
 POTS    -2.7    1.7   -5.1    2.4  -25.8    5.0  NGS wrt ITRF96
 WTZR    -0.7    1.8   -2.1    2.7   -7.7    5.4  NGS wrt ITRF96
 ONSA     0.3    1.7   -5.2    2.3   -7.2    5.4  NGS wrt ITRF96
 NYAL     2.3    1.8   -5.4    2.1   26.8    6.1  NGS wrt ITRF96
 KOSG    -3.2    1.7    0.1    2.5  -16.3    4.9  NGS wrt ITRF96
 Reference sites NOT used 
 MADR   -15.3    2.2   39.4    3.6  -26.8    6.8  NGS wrt ITRF96
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 20.12
 
 Transformation of loose solution ESA to ITRF96
 -----------------------------------------------
 For   36 Sites, RMS after 7 parameter transformation   6.9 mm  ESA wrt ITRF96 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    5.2    5.4      8.3    5.5     -7.5   12.9   0.162  0.285  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.6    1.7    3.2    3.5  -15.4    5.4  ESA wrt ITRF96
 FORT    -3.6    2.2   12.0    6.7   32.3    9.1  ESA wrt ITRF96
 BRAZ    12.9   12.1   -6.5   45.2   55.2   43.7  ESA wrt ITRF96
 KOUR     2.1    2.1  -10.0    7.0  -15.2   10.6  ESA wrt ITRF96
 OHIG   -24.1   72.9  -21.9   83.4  -51.7  129.2  ESA wrt ITRF96
 BRMU    -1.5    1.6   -3.9    3.8   11.8    6.5  ESA wrt ITRF96
 THU1   -12.5    2.4    7.9    2.7   11.4    6.9  ESA wrt ITRF96
 SANT     6.8    3.3   -9.0    5.5  -33.8    7.1  ESA wrt ITRF96
 AREQ     8.6    2.6   -9.1    5.6   -2.4    7.6  ESA wrt ITRF96
 GODE    -1.7    2.2    8.8    4.9   34.8   10.6  ESA wrt ITRF96
 ALGO    -1.3    1.9    2.1    3.8   29.2    6.2  ESA wrt ITRF96
 MDO1    11.6    2.2    6.7    4.6   -1.8    8.3  ESA wrt ITRF96
 YELL     0.9    2.4    5.2    4.0    7.0    5.8  ESA wrt ITRF96
 GOLD     3.0    2.0   -1.1    3.9    8.1    6.1  ESA wrt ITRF96
 FAIR     4.2    2.1    4.5    3.6  -18.5    6.1  ESA wrt ITRF96
 KOKB     6.6    2.6   -3.1    5.0   45.7    9.3  ESA wrt ITRF96
 MAC1    -5.0    2.8  -19.6    4.9   -3.9    6.8  ESA wrt ITRF96
 TIDB    -4.7    2.0   -6.0    4.0    7.2    6.3  ESA wrt ITRF96
 HOB2    -7.9    2.1   -8.3    3.8   19.7    5.9  ESA wrt ITRF96
 GUAM    -3.4    2.3   15.4    5.6   -3.5   11.3  ESA wrt ITRF96
 TSKB     8.5    2.1    2.9    3.7    8.2    7.1  ESA wrt ITRF96
 SHAO     2.1    2.1   11.4    4.2   -7.2    7.5  ESA wrt ITRF96
 PERT    -4.0    2.0  -14.4    4.2    8.3    6.9  ESA wrt ITRF96
 YAR1    -7.6    1.8  -11.8    4.1    9.7    5.9  ESA wrt ITRF96
 IRKT     1.2    2.1    4.4    3.7  -11.1    6.0  ESA wrt ITRF96
 LHAS    -4.8    3.3    4.5    8.2   -5.6   14.0  ESA wrt ITRF96
 DAV1     8.3    5.2   20.5    7.4   24.0   14.7  ESA wrt ITRF96
 KIT3     1.3    2.2   -3.3    4.7  -29.8    9.3  ESA wrt ITRF96
 MALI    -5.6    3.2    4.7   10.2  -14.2   13.9  ESA wrt ITRF96
 ZWEN    -0.3    1.7   10.4    3.1  -28.6    5.0  ESA wrt ITRF96
 TROM     0.4    2.8    6.3    4.3  -15.7    8.7  ESA wrt ITRF96
 POTS     0.0    1.7   -1.5    3.3  -40.0    7.3  ESA wrt ITRF96
 WTZR     2.7    1.7    0.6    3.3  -15.1    5.4  ESA wrt ITRF96
 ONSA     2.7    1.8   -3.4    3.1  -19.8    5.6  ESA wrt ITRF96
 NYAL     1.2    4.2   -4.3    6.5   21.8   12.1  ESA wrt ITRF96
 KOSG    -0.4    1.7    2.0    3.0  -14.8    4.9  ESA wrt ITRF96
 Reference sites NOT used 

 4.0 CENTER FITS TO COMBINED SOLUTION 
 CENTER EMR
 -------------------
 VARIANCE RESCALING FACTOR FOR EMR 21.48
 
 Transformation of loose solution EMR to COMB
 -----------------------------------------------
 For   26 Sites, RMS after 7 parameter transformation   6.2 mm  EMR wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   18.4   10.2     60.9   12.3   -202.7   45.3  -1.399  0.451  EMR  CoM
 
 Adjustments to core site positions for EMR
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     3.8    2.6   -6.1    4.3    6.8    9.4  EMR wrt COMB
 FORT    -4.6    3.5  -23.8   10.9  -39.6   20.8  EMR wrt COMB
 OHIG   -13.5    5.6   11.4    8.3   25.1   18.8  EMR wrt COMB
 BRMU     7.9    2.4   -3.0    4.7   -4.5    9.4  EMR wrt COMB
 THU1     1.5    2.5    6.4    2.9    7.6   10.5  EMR wrt COMB
 SANT   -14.3    3.8   11.0    8.6    2.5   12.2  EMR wrt COMB
 AREQ    -8.2    3.2   11.8    6.1   -9.6   12.6  EMR wrt COMB
 ALGO    10.6    2.3   -0.8    4.0    3.0    8.4  EMR wrt COMB
 YELL     9.8    2.5   -5.9    3.8   -1.4    8.7  EMR wrt COMB
 GOLD     9.9    2.5   -8.6    4.6   -6.5    9.7  EMR wrt COMB
 DRAO     8.6    2.3   -7.8    3.9    1.7    8.2  EMR wrt COMB
 FAIR     5.4    2.6  -13.4    4.3   -2.2   10.1  EMR wrt COMB
 KOKB    -0.5    3.5    6.5    7.6  -17.7   18.7  EMR wrt COMB
 KWJ1    -3.5    4.1   17.9    9.8  -18.2   25.2  EMR wrt COMB
 MAC1    -4.9    3.9    0.0    6.3   20.7   12.7  EMR wrt COMB
 TIDB    -4.1    3.3   11.1    6.3   12.4   12.8  EMR wrt COMB
 GUAM    -1.7    3.8   15.3    9.0  -10.3   21.3  EMR wrt COMB
 TSKB     3.1    3.3   12.6    5.6    5.4   12.7  EMR wrt COMB
 YAR1    -0.1    3.1    1.4    6.7    6.3   13.0  EMR wrt COMB
 IRKT     8.7    3.4    0.1    6.1   -8.8   11.1  EMR wrt COMB
 DAV1     6.4    5.0    4.1    7.9   14.6   17.2  EMR wrt COMB
 MALI    -1.9    4.9  -19.5   14.0    3.0   22.2  EMR wrt COMB
 ZWEN    -0.7    2.7   -9.5    4.8    1.5    8.6  EMR wrt COMB
 WTZR     0.1    2.7   -6.0    4.3    0.1    9.3  EMR wrt COMB
 ONSA    -1.9    2.8   -2.6    4.4    6.0   10.6  EMR wrt COMB
 NYAL    -7.5    3.0   -2.0    4.0  -13.1   13.3  EMR wrt COMB
 Reference sites NOT used 
 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 11.43
 
 Transformation of loose solution JPL to COMB
 -----------------------------------------------
 For   22 Sites, RMS after 7 parameter transformation   2.5 mm  JPL wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
  -14.9    8.4      8.4    8.2    -36.1    9.2  -1.106  0.276  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 FORT     4.8    2.2   -5.5    3.1    0.3    8.5  JPL wrt COMB
 KOUR    -1.0    4.4   -4.7    6.0   21.1   20.9  JPL wrt COMB
 SANT     2.1    2.5   -2.1    3.0    4.1    7.7  JPL wrt COMB
 AREQ     4.8    4.1    6.6    5.3    5.9   17.4  JPL wrt COMB
 ALGO    -1.7    1.7    2.2    1.7   -4.9    5.7  JPL wrt COMB
 YELL    -2.5    1.7    0.9    1.5   -6.6    5.3  JPL wrt COMB
 GOL2    -0.8    1.6    0.8    1.9   -6.0    6.0  JPL wrt COMB
 FAIR    -1.1    1.9   -3.0    2.3   -5.8    6.6  JPL wrt COMB
 KOKB    -4.7    2.0    4.8    2.5    1.1    8.1  JPL wrt COMB
 KWJ1    -4.5    2.0   -1.2    2.4   10.6    8.7  JPL wrt COMB
 MAC1     2.5    2.2    0.2    1.8   -9.4    6.5  JPL wrt COMB
 TID2     3.9    1.7    0.8    1.5   -6.5    5.9  JPL wrt COMB
 HOB2     5.2    1.7    1.0    1.5   -4.6    5.8  JPL wrt COMB
 GUAM    -0.4    1.9   -0.1    2.2    1.1    8.0  JPL wrt COMB
 TSKB    -2.8    1.7    0.0    1.6    5.7    5.8  JPL wrt COMB
 YAR1     2.7    1.7   -2.6    2.0  -15.8    6.5  JPL wrt COMB
 IRKT    -2.6    1.8   -0.1    1.6    3.3    5.9  JPL wrt COMB
 DAV1     1.8    4.1   -3.1    4.8   -0.9   12.5  JPL wrt COMB
 KIT3    -3.2    2.4    0.3    2.4    6.6    9.3  JPL wrt COMB
 MALI     0.4    2.5    3.9    3.9   19.4   10.0  JPL wrt COMB
 WTZR    -4.7    1.9   -0.6    2.0    2.5    6.2  JPL wrt COMB
 ONSA    -1.5    2.2   -0.9    2.0   -1.5    6.8  JPL wrt COMB
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 84.1
 
 Transformation of loose solution GFZ to COMB
 -----------------------------------------------
 For   33 Sites, RMS after 7 parameter transformation   2.1 mm  GFZ wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    3.4    1.3     -2.8    1.3      1.4    0.9   0.086  0.146  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.1    1.1    0.3    1.1    7.3    3.8  GFZ wrt COMB
 FORT     3.2    1.4   -1.1    1.9   -4.3    6.4  GFZ wrt COMB
 KOUR     0.2    1.8   -4.6    2.4    8.6    9.0  GFZ wrt COMB
 BRMU     0.6    1.0   -1.4    1.1    3.0    4.2  GFZ wrt COMB
 THU1     0.7    1.0   -1.3    0.9   -7.2    4.6  GFZ wrt COMB
 SANT     3.3    1.6   -0.2    1.5    2.3    5.0  GFZ wrt COMB
 AREQ     5.3    1.4    1.1    1.5    6.5    5.0  GFZ wrt COMB
 WES2    -0.5    1.0   -0.9    0.9    0.5    3.6  GFZ wrt COMB
 ALGO    -1.6    1.1   -1.6    0.9    0.4    3.6  GFZ wrt COMB
 NLIB     0.0    1.1    0.9    1.0   -4.5    4.2  GFZ wrt COMB
 MDO1    -2.7    1.1    0.5    1.1  -14.1    4.4  GFZ wrt COMB
 YELL    -2.3    1.2    1.5    0.9   -7.0    3.7  GFZ wrt COMB
 GOL2    -1.0    1.1    3.2    1.1   -9.8    4.0  GFZ wrt COMB
 DRAO    -2.1    1.1    3.3    1.0  -10.3    3.5  GFZ wrt COMB
 FAIR     1.0    1.3    2.2    1.1   -9.9    4.5  GFZ wrt COMB
 KOKB    -4.2    1.4    1.9    2.3   -2.7    6.3  GFZ wrt COMB
 KWJ1    -4.7    1.6   -4.2    2.2   12.2    7.1  GFZ wrt COMB
 MAC1     5.0    1.5    2.0    1.4    1.5    4.7  GFZ wrt COMB
 TID2     4.3    1.3    2.8    1.4    0.9    4.5  GFZ wrt COMB
 HOB2     6.4    1.3    3.4    1.4    2.0    4.5  GFZ wrt COMB
 GUAM    -1.3    1.5   -3.8    1.9   11.5    6.7  GFZ wrt COMB
 TSKB    -4.3    1.3   -1.5    1.4   -0.3    4.6  GFZ wrt COMB
 IRKT    -1.3    1.3   -2.4    1.1   -3.9    4.0  GFZ wrt COMB
 LHAS    -2.9    1.3   -2.0    1.5    1.5    5.0  GFZ wrt COMB
 DAV1     3.2    1.9   -4.7    1.9  -17.2    6.3  GFZ wrt COMB
 KIT3    -2.6    1.4   -0.3    1.4    3.2    5.6  GFZ wrt COMB
 MALI     1.9    1.8    4.6    2.2   11.7    7.2  GFZ wrt COMB
 ZWEN    -0.8    1.1   -0.2    0.9    3.1    3.6  GFZ wrt COMB
 MATE    -0.3    1.2    0.3    1.1    6.1    4.3  GFZ wrt COMB
 POTS     0.9    1.2    0.0    0.9    2.6    4.0  GFZ wrt COMB
 WTZR    -0.6    1.2   -0.2    1.0    6.1    4.0  GFZ wrt COMB
 ONSA     1.6    1.4    0.5    1.1    4.9    4.5  GFZ wrt COMB
 KOSG    -0.1    1.2   -1.0    1.0    3.4    3.8  GFZ wrt COMB
 Reference sites NOT used 
 
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 59.4
 
 Transformation of loose solution COD to COMB
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation   1.9 mm  COD wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -1.7    2.6     -4.6    2.5     -8.1    3.9  -1.555  0.131  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.5    0.8    0.3    0.9   -4.0    3.1  COD wrt COMB
 FORT    -3.2    1.6   -1.0    5.3   -3.2    7.7  COD wrt COMB
 KOUR    -9.3    3.2    3.2    5.2   -1.7   28.0  COD wrt COMB
 BRMU    -1.9    0.7    2.5    1.1   -9.1    3.7  COD wrt COMB
 THU1     1.9    0.7    0.8    0.9    7.8    3.4  COD wrt COMB
 SANT    -3.4    1.7    0.9    2.3   -2.5    4.1  COD wrt COMB
 AREQ    -5.2    1.5   -0.6    2.4   -5.8    4.8  COD wrt COMB
 WES2    -1.1    0.7    1.6    0.9   -6.0    2.7  COD wrt COMB
 GODE    -1.4    1.0    1.4    1.1   -6.4    5.5  COD wrt COMB
 ALGO    -0.5    0.7    1.3    0.9   -3.7    2.7  COD wrt COMB
 NLIB    -0.3    0.7    0.1    0.8   -3.7    3.1  COD wrt COMB
 MDO1    -1.4    0.8   -0.8    1.0    6.6    3.6  COD wrt COMB
 PIE1    -0.8    0.7   -1.3    0.9    6.4    3.3  COD wrt COMB
 YELL     0.8    0.7   -0.8    0.7    4.4    2.6  COD wrt COMB
 GOLD    -0.2    0.8   -2.0    1.0    2.3    3.1  COD wrt COMB
 DRAO    -0.2    0.7   -1.8    0.8    4.5    2.6  COD wrt COMB
 FAIR    -0.4    0.9   -0.8    1.0    9.8    3.5  COD wrt COMB
 KOKB     2.3    1.5   -2.2    2.5   -0.1    8.8  COD wrt COMB
 KWJ1     1.3    1.5    0.4    3.7   -3.5    7.2  COD wrt COMB
 MAC1    -3.1    1.3    2.8    1.4   -5.0    3.5  COD wrt COMB
 TIDB    -1.9    0.9    2.3    1.4  -10.3    3.1  COD wrt COMB
 HOB2    -2.9    1.0    1.5    1.3  -11.8    3.1  COD wrt COMB
 GUAM     3.0    1.7    0.4    4.5    7.4   10.3  COD wrt COMB
 TSKB     1.1    1.1   -2.6    1.6   10.3    3.9  COD wrt COMB
 SHAO     1.4    1.1   -1.6    1.7   12.7    4.4  COD wrt COMB
 PERT    -1.6    0.9   -2.4    1.5  -10.0    3.7  COD wrt COMB
 YAR1    -1.3    0.9   -2.2    1.5   -4.5    3.4  COD wrt COMB
 IRKT     0.4    0.9    0.1    1.1   11.7    3.1  COD wrt COMB
 LHAS     2.8    1.2   -0.6    1.9    9.0    4.7  COD wrt COMB
 DAV1    -7.1    2.0    2.8    2.6    3.7    5.7  COD wrt COMB
 KIT3     1.9    1.1   -0.7    1.4    3.9    5.7  COD wrt COMB
 MALI     3.7    1.8   -0.5    4.7  -21.6    7.3  COD wrt COMB
 ZWEN     0.4    0.7    1.0    0.8    2.7    2.8  COD wrt COMB
 MATE     1.3    0.8    0.8    1.0   -2.4    3.7  COD wrt COMB
 GRAZ     1.0    0.7    0.8    0.8    1.2    2.9  COD wrt COMB
 POTS     0.5    0.7    0.7    0.8    4.0    3.3  COD wrt COMB
 WTZR     0.5    0.8    0.7    0.8   -2.2    3.1  COD wrt COMB
 ONSA     0.1    0.8    1.0    0.7    1.2    2.9  COD wrt COMB
 KOSG     0.1    0.7    0.7    0.8    3.7    2.7  COD wrt COMB
 Reference sites NOT used 
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 2.006
 
 Transformation of loose solution SIO to COMB
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation   2.4 mm  SIO wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   16.7    5.7      0.8    5.9   -120.7   19.8  -0.786  0.210  SIO  CoM
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -2.9    1.3    2.7    2.3   -4.1    5.0  SIO wrt COMB
 FORT    -3.7    2.0    2.0    4.7   -5.2    7.8  SIO wrt COMB
 KOUR    -1.0    1.9    7.7    4.8   -0.9    9.5  SIO wrt COMB
 BRMU    -0.2    1.1    4.8    2.6    1.9    5.3  SIO wrt COMB
 THU1    -3.3    1.5   -0.6    1.9    1.4    7.2  SIO wrt COMB
 SANT     5.5    2.8   -5.2    4.5   18.8    7.3  SIO wrt COMB
 AREQ     1.7    2.2   -1.4    4.6   11.9    7.9  SIO wrt COMB
 WES2     0.3    1.1    2.9    2.2    3.8    4.7  SIO wrt COMB
 GODE    -0.6    1.5    3.2    3.4   -3.0    8.4  SIO wrt COMB
 ALGO     0.9    1.0    3.6    1.7    0.5    3.6  SIO wrt COMB
 NLIB     1.0    1.2    1.5    2.3    1.5    5.1  SIO wrt COMB
 MDO1     1.5    1.3   -4.5    2.5   -8.6    5.9  SIO wrt COMB
 PIE1     1.9    1.2   -4.7    2.5  -12.2    5.4  SIO wrt COMB
 YELL     1.3    1.3    0.6    2.2    0.1    5.0  SIO wrt COMB
 GOL2     0.8    1.1   -4.0    2.1    3.0    4.3  SIO wrt COMB
 DRAO     2.5    1.1   -2.8    1.9   -2.1    3.6  SIO wrt COMB
 FAIR     1.3    1.5   -2.2    2.4   -0.8    5.6  SIO wrt COMB
 KOKB    -1.1    1.7   -6.8    3.0   -8.0    5.7  SIO wrt COMB
 KWJ1    -1.3    1.9    0.5    4.2  -18.2    9.0  SIO wrt COMB
 MAC1    -2.2    1.8   -0.9    2.9   15.4    5.9  SIO wrt COMB
 TID2    -3.3    1.3   -0.3    2.6    9.2    5.5  SIO wrt COMB
 HOB2    -2.6    1.4    2.3    2.5   14.3    5.2  SIO wrt COMB
 GUAM    -0.7    1.7    0.0    3.8   -5.9    8.4  SIO wrt COMB
 TSKB     4.0    1.7    1.3    2.7  -15.8    7.8  SIO wrt COMB
 SHAO     4.8    1.7    5.2    3.1   -4.0    6.0  SIO wrt COMB
 PERT    -0.6    1.2   -2.4    2.8   13.3    5.6  SIO wrt COMB
 YAR1    -0.7    1.2   -4.2    2.8    4.2    5.5  SIO wrt COMB
 IRKT     5.2    1.8    2.6    2.5   -5.5    5.3  SIO wrt COMB
 LHAS     3.8    1.7    3.2    3.4   -6.5    7.1  SIO wrt COMB
 DAV1     0.3    2.5    5.6    3.9    2.8    7.8  SIO wrt COMB
 KIT3     4.5    1.3    2.5    2.4   -4.3    4.4  SIO wrt COMB
 MALI    -3.2    2.6   -1.5    6.8   -0.6   10.5  SIO wrt COMB
 ZWEN     2.8    1.2   -1.0    2.2    1.1    4.7  SIO wrt COMB
 MATE    -1.3    1.3    0.7    2.5    0.6    5.4  SIO wrt COMB
 GRAZ    -0.5    1.3    0.1    2.2   -1.2    5.7  SIO wrt COMB
 POTS     0.4    1.1   -1.0    1.8   -1.8    4.0  SIO wrt COMB
 WTZR     0.4    1.1   -2.0    1.8    2.5    3.6  SIO wrt COMB
 ONSA     0.3    1.2   -3.1    1.8    3.1    4.3  SIO wrt COMB
 KOSG     0.5    1.2   -0.4    1.9   -5.9    3.9  SIO wrt COMB
 Reference sites NOT used 
 
 CENTER NGS
 -------------------
 VARIANCE RESCALING FACTOR FOR NGS 125.2
 
 Transformation of loose solution NGS to COMB
 -----------------------------------------------
 For   40 Sites, RMS after 7 parameter transformation   3.3 mm  NGS wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   15.0    9.1     -2.3    9.7    -90.3   34.1  -0.026  0.450  NGS  CoM
 
 Adjustments to core site positions for NGS
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -2.2    2.2    2.7    3.3    1.7    6.0  NGS wrt COMB
 FORT     5.6    6.0   14.4   12.5   -0.3   15.5  NGS wrt COMB
 BRMU     1.8    1.9    0.1    3.5    6.1    6.0  NGS wrt COMB
 THU1    -2.9    2.1   -2.5    2.0    6.4    5.7  NGS wrt COMB
 WES2     2.1    1.7   -1.3    2.9    4.7    5.0  NGS wrt COMB
 GODE     3.3    2.0   -1.4    4.1    9.0    9.8  NGS wrt COMB
 ALGO     2.5    1.7   -1.8    2.7    2.1    4.9  NGS wrt COMB
 NLIB     0.1    1.5   -2.8    2.6    2.2    5.6  NGS wrt COMB
 MDO1    -0.5    2.1   -0.8    3.3    0.4    7.0  NGS wrt COMB
 PIE1    -0.9    1.9   -1.1    3.2   -5.7    6.5  NGS wrt COMB
 YELL    -1.0    1.8   -1.6    2.6    2.0    5.0  NGS wrt COMB
 GOLD    -1.7    2.0   -1.4    3.4   -2.5    6.4  NGS wrt COMB
 DRAO    -1.4    1.7   -0.9    2.9   -1.2    5.3  NGS wrt COMB
 FAIR    -3.0    2.0   -2.2    3.2    3.3    5.9  NGS wrt COMB
 KOKB    -3.4    4.4  -11.6    7.4   -8.2   10.6  NGS wrt COMB
 KWJ1     1.3    5.1  -12.6   10.3   -0.3   16.7  NGS wrt COMB
 MAC1     4.2    4.3    2.6    6.4    6.4    8.3  NGS wrt COMB
 TIDB     4.9    2.6    0.2    5.3   12.3    7.6  NGS wrt COMB
 HOB2     3.7    3.1    1.3    5.5    1.8    8.1  NGS wrt COMB
 GUAM    -2.3    3.9    0.8    6.6  -18.6   10.3  NGS wrt COMB
 TSKB    -1.9    3.2    1.9    4.3   -4.8    5.7  NGS wrt COMB
 SHAO    -1.1    3.2    5.3    4.4   -7.6    5.9  NGS wrt COMB
 PERT     3.5    2.3   -4.2    4.9    8.4    6.7  NGS wrt COMB
 YAR1     3.3    2.3   -6.6    5.0    2.2    6.8  NGS wrt COMB
 IRKT     0.6    2.7    3.1    3.3  -13.8    5.6  NGS wrt COMB
 LHAS    -0.8    3.3    1.4    5.0  -12.8    8.4  NGS wrt COMB
 DAV1    -9.3    6.6    9.8    7.7    4.3   10.8  NGS wrt COMB
 KIT3    -0.8    3.0    1.0    5.0    0.8    9.3  NGS wrt COMB
 MALI    -9.4    4.8   -0.8    9.8  -13.4    9.9  NGS wrt COMB
 ZWEN     1.2    1.8   -4.6    2.6   -0.9    5.0  NGS wrt COMB
 TROM     0.6    1.7   -3.6    2.1    0.0    5.2  NGS wrt COMB
 MATE    -3.0    2.2   -3.8    3.3   -1.4    6.1  NGS wrt COMB
 GRAZ    -2.4    1.9   -2.6    2.7    2.6    5.2  NGS wrt COMB
 POTS    -1.7    1.8   -2.5    2.5   -0.6    5.0  NGS wrt COMB
 WTZR    -2.0    1.9   -1.6    2.8   -0.8    5.5  NGS wrt COMB
 ONSA    -1.0    1.7   -4.4    2.4    2.4    5.4  NGS wrt COMB
 NYAL     2.0    1.8   -2.5    2.1    0.5    6.1  NGS wrt COMB
 KOSG    -1.7    1.8   -0.7    2.5   -3.9    5.0  NGS wrt COMB
 Reference sites NOT used 
 MADR    -2.1    2.3    0.6    3.7    0.8    6.8  NGS wrt COMB
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 20.12
 
 Transformation of loose solution ESA to COMB
 -----------------------------------------------
 For   36 Sites, RMS after 7 parameter transformation   4.7 mm  ESA wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    5.4    5.4      4.3    5.5     -7.5   12.9  -0.137  0.287  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.0    1.7    2.1    3.6   -1.6    5.4  ESA wrt COMB
 BRAZ    -8.6   12.0    8.1   44.9  -19.7   43.7  ESA wrt COMB
 KOUR    -1.9    2.2    0.2    7.1  -16.6   10.6  ESA wrt COMB
 OHIG   -30.2   72.8  -24.5   83.4  -68.2  129.2  ESA wrt COMB
 BRMU     1.4    1.7   -4.4    3.9   10.6    6.6  ESA wrt COMB
 THU1    -4.1    2.4    2.8    2.8   -0.4    6.9  ESA wrt COMB
 SANT    -9.4    3.5   -9.0    5.6  -24.8    7.2  ESA wrt COMB
 AREQ    -3.7    2.8   -5.3    5.7   -9.6    7.7  ESA wrt COMB
 GODE     3.3    2.2   -4.8    4.9   14.4   10.6  ESA wrt COMB
 ALGO     1.9    1.9   -0.5    3.8   15.6    6.2  ESA wrt COMB
 MDO1     6.6    2.2    3.9    4.6    2.7    8.3  ESA wrt COMB
 YELL     2.6    2.4    2.3    4.0    6.6    5.8  ESA wrt COMB
 GOLD     5.1    2.0    3.4    3.9    8.7    6.1  ESA wrt COMB
 FAIR     3.4    2.1   -1.6    3.5   -0.9    6.0  ESA wrt COMB
 KOKB     7.3    2.5   -3.4    4.9   31.9    9.2  ESA wrt COMB
 KWJ1     5.8    2.4   14.2    5.6   -9.4   11.1  ESA wrt COMB
 MAC1    -8.8    2.8    1.0    4.9   -7.0    6.8  ESA wrt COMB
 TIDB    -5.3    2.0   -2.9    4.1    1.6    6.2  ESA wrt COMB
 HOB2    -7.3    2.1   -4.7    3.9   14.2    5.9  ESA wrt COMB
 GUAM     2.2    2.2    8.1    5.5   -9.9   11.2  ESA wrt COMB
 TSKB     5.8    2.1    5.9    3.6   -0.9    7.1  ESA wrt COMB
 SHAO     3.6    2.1    6.8    4.2   -2.5    7.4  ESA wrt COMB
 PERT    -2.5    2.0  -14.1    4.3   10.5    6.9  ESA wrt COMB
 YAR1    -2.4    1.9  -14.1    4.2   15.3    5.9  ESA wrt COMB
 IRKT     4.4    2.1    1.9    3.7   -2.8    6.0  ESA wrt COMB
 LHAS     3.9    3.3   -4.4    8.2   -1.6   14.0  ESA wrt COMB
 DAV1    -4.1    5.3    1.5    7.4   21.1   14.7  ESA wrt COMB
 KIT3    -0.1    2.3    0.9    4.7   -6.9    9.3  ESA wrt COMB
 MALI    -8.5    3.2    3.7   10.1    5.4   14.0  ESA wrt COMB
 ZWEN     1.1    1.7    3.7    3.1   -8.9    5.1  ESA wrt COMB
 TROM     2.1    2.8    3.8    4.3   -8.6    8.7  ESA wrt COMB
 POTS     1.1    1.8    2.3    3.4  -12.2    7.3  ESA wrt COMB
 WTZR     1.5    1.8    2.2    3.4   -5.7    5.5  ESA wrt COMB
 ONSA     1.5    1.8   -1.3    3.1   -7.6    5.6  ESA wrt COMB
 NYAL     1.0    4.3    0.0    6.5   -1.7   12.1  ESA wrt COMB
 KOSG     1.5    1.7    2.5    3.1    0.0    4.9  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)
51314.50  -18694  272708  5557801  12186    49    52   66667      47 138 43  0   -611   1744     62     64    -.046   .000   .000
51315.50  -19244  274374  5546451  10619    46    49   66667      41 138 43  0   -489   1587     49     49    -.051   .000   .000
51316.50  -19621  275797  5536077  10235    46    49   66667      40 138 43  0   -266   1259     46     47    -.053   .000   .000
51317.50  -19878  276754  5525627  10751    46    49   66667      39 138 43  0   -248    656     45     47    -.055   .000   .000
51318.50  -20072  277413  5514777  11020    46    49   66667      39 138 43  0   -139    662     45     46    -.055   .000   .000
51319.50  -20114  278101  5503303  11944    46    49   66667      39 138 43  0     55    713     44     46    -.054   .000   .000
51320.50  -20072  278824  5490881  12865    47    50   66667      45 150 43  0     28    732     50     53    -.046   .000   .000

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