Subject: [IGSREPORT-7185] Wk 1060 MIT T2 Analysis Report
From: Tom Herring <[email-masked]>
To: [email-masked], [email-masked], [email-masked], [email-masked]
Date: Thu, 18 May 2000 07:57:35 -0400 (EDT)

******************************************************************************
IGS Electronic Report   18 May 04:58:02 PDT 2000      Message Number 7185
******************************************************************************

Author: Thomas Herring

********************************************************************************
MIT ANALYSIS REPORT GPS-WEEK 1060    Dates: 00apr30  to  00may06 
********************************************************************************

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
   MIT1060g.SNX   Combined sinex file from all available analysis centers
   MIT1060g.SUM   Name of this summary file
   MIT1060g.RES   File of the individual AC position estimates residuals 
                  to the combined solution for the week. 

We once again eliminated EMR due to large UT1 errors

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     70    2.1    1.2     2.1    1.2     9.0    1.5  
 JPL    119    1.2    1.2     1.3    1.2     6.2    1.6  
 SIO    103    2.4    1.3     2.4     .9     8.4    1.5  
 EMR      0     .0     .0      .0     .0      .0     .0  
 ESA     55    4.6    2.3     4.8    1.3     9.9    1.4  
 GFZ     62    2.4     .9     2.0     .8     8.1     .9  
 NGS     72    5.8    1.5     6.2    1.1    14.0    1.4  
 
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 TRM14532.00      dL1   .0000  -.0030   .0780  dL2  -.0031  -.0013   .0744  m
 NOA  BAKO Eccentricity: Used          .0000   .0000  1.6760 Real   .0000   .0000  1.6160  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  INEG Used TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 COD  INEG Real ASH700228D       dL1   .0005   .0003   .0799  dL2  -.0012   .0008   .0792  m
 COD  INEG Eccentricity: Used          .0000   .0000   .0705 Real   .0000   .0000   .0660  m
 SIO  INEG Used ASH700228D       dL1  -.0002  -.0010   .0808  dL2  -.0019   .0038   .0778  m
 SIO  INEG Real ASH700228D       dL1   .0005   .0003   .0799  dL2  -.0012   .0008   .0792  m
 ESA  REYK Eccentricity: Used          .0000   .0000   .0685 Real   .0000   .0000   .0680  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   3.6 mm  COMBINED wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    3.2    0.7     -1.7    0.7      7.9    0.8  -2.336  0.087  COMBINED  CoM
 
 Adjustments to core site positions for COMBINED
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     5.6    0.6    4.6    0.7   -7.8    2.7  COMBINED wrt ITRF97
 MAS1     6.2    0.5   -0.5    0.8    4.2    2.0  COMBINED wrt ITRF97
 FORT    -2.3    1.0   -7.7    2.5  -14.3    5.7  COMBINED wrt ITRF97
 KOUR    -0.5    0.6   -8.2    1.2    2.0    2.7  COMBINED wrt ITRF97
 OHIG     4.1    1.1   -3.2    1.0   -1.0    3.6  COMBINED wrt ITRF97
 BRMU    -0.9    0.5   -1.7    0.7    1.8    2.9  COMBINED wrt ITRF97
 THU1    -2.4    0.6    1.0    0.6   15.4    2.7  COMBINED wrt ITRF97
 SANT     5.6    0.8    7.5    0.9   -7.5    2.7  COMBINED wrt ITRF97
 AREQ     4.8    0.7    5.9    0.8   -1.8    2.2  COMBINED wrt ITRF97
 WES2    -5.4    0.5    6.6    0.5   10.4    2.1  COMBINED wrt ITRF97
 GODE    -1.7    0.5    4.0    0.6    2.0    2.1  COMBINED wrt ITRF97
 ALGO    -0.8    0.5    3.4    0.5   11.8    1.9  COMBINED wrt ITRF97
 NLIB    -2.6    0.6    0.0    0.6   14.4    2.6  COMBINED wrt ITRF97
 MDO1    -2.2    0.6    1.5    0.7   -1.7    3.1  COMBINED wrt ITRF97
 PIE1    -4.3    0.5    4.0    0.7    6.5    2.6  COMBINED wrt ITRF97
 YELL    -1.7    0.6   -2.6    0.6    5.0    2.1  COMBINED wrt ITRF97
 DRAO    -0.1    0.5   -1.5    0.6   -5.9    2.0  COMBINED wrt ITRF97
 FAIR     1.5    1.2    2.9    1.0   -7.2    3.9  COMBINED wrt ITRF97
 KOKB    -4.3    0.7   -2.4    1.2   -3.6    2.7  COMBINED wrt ITRF97
 MAC1    -0.8    0.7   -8.3    0.7    2.1    2.5  COMBINED wrt ITRF97
 TID2     1.1    0.6   -0.2    0.7   12.3    2.6  COMBINED wrt ITRF97
 HOB2     0.9    0.6   -1.1    0.6   14.7    2.0  COMBINED wrt ITRF97
 GUAM    -3.2    0.7  -11.7    1.2   -4.5    2.8  COMBINED wrt ITRF97
 TSKB     4.6    0.9  -10.3    1.2    2.1    3.6  COMBINED wrt ITRF97
 PERT    -0.4    0.7    5.2    0.9   -7.1    3.4  COMBINED wrt ITRF97
 YAR1     0.2    0.6    8.3    0.8   -2.8    2.7  COMBINED wrt ITRF97
 IRKT     1.1    0.7   -4.3    0.7    4.6    2.4  COMBINED wrt ITRF97
 LHAS    -2.9    2.3    5.4    5.9  -11.8   12.4  COMBINED wrt ITRF97
 DAV1    -1.7    1.1    6.6    1.0    8.8    4.0  COMBINED wrt ITRF97
 KERG    -0.2    0.8    2.4    1.0   -3.8    2.7  COMBINED wrt ITRF97
 MALI    -2.3    1.8  -10.8    7.5   47.7   12.8  COMBINED wrt ITRF97
 MATE    -1.8    0.8    3.0    0.9  -14.0    3.7  COMBINED wrt ITRF97
 GRAZ     1.9    0.6   -0.1    0.6  -13.3    2.6  COMBINED wrt ITRF97
 POTS    -0.7    0.5   -1.8    0.5  -14.4    1.7  COMBINED wrt ITRF97
 WTZR     2.2    0.5    0.0    0.5   -2.9    1.8  COMBINED wrt ITRF97
 ONSA     1.6    0.5    0.3    0.5  -17.7    1.8  COMBINED wrt ITRF97
 NYAL     5.3    1.2    3.1    1.3   15.6    5.0  COMBINED wrt ITRF97
 KOSG     1.0    0.5    1.6    0.5  -13.1    2.0  COMBINED wrt ITRF97
 Reference sites NOT used 

 3.0 CENTER FITS TO ITRF 1996
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 82.77
 
 Transformation of loose solution JPL to ITRF97
 -----------------------------------------------
 For   32 Sites, RMS after 7 parameter transformation   3.2 mm  JPL wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -7.0    2.8      5.3    2.8     10.2    4.4  -3.088  0.145  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     5.1    0.9    2.8    0.9  -16.1    4.9  JPL wrt ITRF97
 MAS1     5.9    0.8   -0.2    1.7   -1.9    3.5  JPL wrt ITRF97
 KOUR    -3.2    1.0   -7.6    2.3   -1.7    4.2  JPL wrt ITRF97
 OHIG     4.7    2.4   -1.8    2.5   20.6    6.1  JPL wrt ITRF97
 BRMU    -1.5    0.7   -0.1    1.0   -1.3    4.1  JPL wrt ITRF97
 THU1    -1.6    0.7    1.9    0.8   20.5    3.5  JPL wrt ITRF97
 SANT     3.7    1.7    5.3    1.9   -8.5    4.8  JPL wrt ITRF97
 AREQ     3.0    1.2    3.7    1.8   -3.3    3.6  JPL wrt ITRF97
 WES2    -5.2    0.7    7.9    0.8    3.6    3.1  JPL wrt ITRF97
 GODE    -1.3    0.7    4.8    0.8   -1.6    2.9  JPL wrt ITRF97
 ALGO    -0.1    0.7    4.3    0.7    6.3    2.9  JPL wrt ITRF97
 NLIB    -1.0    0.7   -0.9    0.7   12.2    3.4  JPL wrt ITRF97
 MDO1    -1.4    0.8   -1.1    1.0    1.6    4.4  JPL wrt ITRF97
 PIE1    -3.5    0.8    1.0    0.9   13.8    4.5  JPL wrt ITRF97
 YELL     0.9    0.9   -4.4    0.8   11.4    3.1  JPL wrt ITRF97
 DRAO     2.9    0.8   -4.6    0.9   -1.9    2.9  JPL wrt ITRF97
 KOKB     1.4    1.4   -7.5    2.5   -3.7    7.0  JPL wrt ITRF97
 MAC1    -1.7    1.2   -7.2    1.2   -0.8    3.6  JPL wrt ITRF97
 TID2     1.4    0.8   -0.9    1.0    6.0    3.8  JPL wrt ITRF97
 HOB2     0.2    0.8   -1.3    1.0    7.9    3.1  JPL wrt ITRF97
 PERT     0.0    0.9    1.7    1.1  -10.3    5.2  JPL wrt ITRF97
 YAR1     0.7    0.9    4.5    1.1   -1.1    4.3  JPL wrt ITRF97
 IRKT     1.2    1.3   -2.9    1.4   12.0    4.0  JPL wrt ITRF97
 DAV1    -3.0    2.1    4.2    2.0   22.9    7.8  JPL wrt ITRF97
 KERG    -1.2    1.3   -0.7    2.2    2.1    4.6  JPL wrt ITRF97
 MATE    -1.6    1.2    2.0    1.1  -18.5    7.3  JPL wrt ITRF97
 GRAZ     1.5    0.8   -1.0    0.8  -16.5    4.1  JPL wrt ITRF97
 POTS    -1.5    0.7   -2.9    0.7  -14.5    2.8  JPL wrt ITRF97
 WTZR     1.9    0.7   -0.9    0.7   -4.9    3.1  JPL wrt ITRF97
 ONSA     0.0    0.7   -0.3    0.7  -17.2    2.9  JPL wrt ITRF97
 KOSG    -0.2    0.7    0.4    0.7  -12.8    2.9  JPL wrt ITRF97
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 16.23
 
 Transformation of loose solution GFZ to ITRF97
 -----------------------------------------------
 For   22 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)
    3.6    9.0     -4.6    9.1     27.7    9.2  -2.360  0.290  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     7.7    1.7   -0.6    1.8   -3.1    6.9  GFZ wrt ITRF97
 FORT    -3.8    2.2   -5.4    3.1  -12.0   10.7  GFZ wrt ITRF97
 KOUR    -4.9    2.1   -7.4    2.6   -7.9    9.3  GFZ wrt ITRF97
 OHIG     5.2    3.2   -5.2    2.5  -11.0    9.7  GFZ wrt ITRF97
 SANT     4.8    2.1   10.9    1.9    3.3    7.2  GFZ wrt ITRF97
 AREQ     5.1    1.9   11.4    2.0    4.3    7.7  GFZ wrt ITRF97
 ALGO    -3.4    1.9    1.8    1.5   -1.9    6.3  GFZ wrt ITRF97
 MDO1    -2.2    5.3    4.1    4.7   16.5   20.7  GFZ wrt ITRF97
 YELL    -4.8    2.2   -2.6    1.7    2.4    7.2  GFZ wrt ITRF97
 FAIR    -0.7    2.0    3.1    1.6  -14.0    7.2  GFZ wrt ITRF97
 KOKB    -5.5    1.9    1.7    2.4   -5.5    7.5  GFZ wrt ITRF97
 MAC1     3.7    2.7   -4.9    2.0   -2.1    7.6  GFZ wrt ITRF97
 HOB2     7.2    2.9    2.2    2.3   12.3   10.0  GFZ wrt ITRF97
 GUAM    -3.9    1.8   -9.6    1.9   -8.0    7.3  GFZ wrt ITRF97
 TSKB     3.5    2.2   -8.1    2.0   16.7    8.8  GFZ wrt ITRF97
 YAR1    -2.1    2.0   11.3    2.2  -13.0    8.2  GFZ wrt ITRF97
 IRKT    -0.7    2.2   -4.2    1.8    2.6    7.1  GFZ wrt ITRF97
 DAV1    -0.1    3.7    8.2    3.3   19.8   12.0  GFZ wrt ITRF97
 KERG     1.3    2.4    1.0    2.3    5.8    7.4  GFZ wrt ITRF97
 MALI    -2.7    2.9  -11.7    9.5   59.1   17.9  GFZ wrt ITRF97
 WTZR     2.0    1.9    2.1    1.7   -6.9    6.5  GFZ wrt ITRF97
 ONSA     3.9    1.9    2.3    1.6  -18.8    6.3  GFZ wrt ITRF97
 Reference sites NOT used 
 
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 170.95
 
 Transformation of loose solution COD to ITRF97
 -----------------------------------------------
 For   30 Sites, RMS after 7 parameter transformation   4.0 mm  COD wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    1.9    1.1     -2.9    1.0      7.0    1.2  -1.941  0.199  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     5.1    1.7    6.2    1.5   -1.9    6.0  COD wrt ITRF97
 MAS1     6.6    1.3    0.4    1.4    6.6    5.1  COD wrt ITRF97
 KOUR    -8.3    1.8  -11.6    2.3   10.3    8.2  COD wrt ITRF97
 OHIG     7.4    2.3   -3.3    1.7   -9.3    7.5  COD wrt ITRF97
 BRMU    -0.5    1.4   -3.6    1.4    4.0    6.1  COD wrt ITRF97
 SANT     6.7    1.7    7.2    1.4    7.2    5.5  COD wrt ITRF97
 AREQ     5.7    1.5    5.6    1.4    9.9    5.2  COD wrt ITRF97
 WES2    -6.6    1.5    4.8    1.3    9.7    5.0  COD wrt ITRF97
 ALGO    -2.8    1.4    1.4    1.2    8.8    4.6  COD wrt ITRF97
 NLIB    -3.9    1.6    0.4    1.5   12.1    6.3  COD wrt ITRF97
 MDO1    -3.3    1.5    0.2    1.6  -14.0    6.3  COD wrt ITRF97
 YELL    -2.3    1.7   -2.2    1.5   -1.7    5.3  COD wrt ITRF97
 DRAO    -0.5    1.5   -0.3    1.5  -10.4    4.8  COD wrt ITRF97
 FAIR     1.3    1.9    1.6    1.6  -11.2    6.1  COD wrt ITRF97
 KOKB    -7.1    1.7   -5.2    2.8   -5.1    6.4  COD wrt ITRF97
 MAC1     2.2    1.7   -7.4    1.4    3.2    5.4  COD wrt ITRF97
 TID2     4.2    1.6    5.8    2.3   18.5    5.9  COD wrt ITRF97
 HOB2     3.2    1.4    0.6    1.4    9.3    5.2  COD wrt ITRF97
 TSKB     0.3    3.5  -16.2    3.2    8.9   15.5  COD wrt ITRF97
 YAR1     0.9    1.6    3.7    2.0  -15.2    6.5  COD wrt ITRF97
 IRKT    -1.5    1.8   -8.0    1.5    8.3    5.4  COD wrt ITRF97
 DAV1    -0.9    1.9    3.8    1.6   -8.4    6.7  COD wrt ITRF97
 KERG     1.3    1.7   -0.6    1.6   -4.7    5.3  COD wrt ITRF97
 MATE    -2.4    3.5    3.1    6.1   -4.9   10.6  COD wrt ITRF97
 POTS    -0.7    1.5   -1.0    1.2   -8.8    4.7  COD wrt ITRF97
 WTZR    -0.9    1.5    0.2    1.3    2.9    5.0  COD wrt ITRF97
 ONSA     2.2    1.5    0.9    1.2  -12.6    4.8  COD wrt ITRF97
 KOSG    -0.4    1.6    2.7    1.3   -9.6    5.2  COD wrt ITRF97
 Reference sites NOT used 
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 2.15
 
 Transformation of loose solution SIO to ITRF97
 -----------------------------------------------
 For   18 Sites, RMS after 7 parameter transformation   3.8 mm  SIO wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -5.7    5.8     22.0    5.8    -59.5   16.0  -2.084  0.302  SIO  CoM
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     5.3    1.8    6.8    2.0   -1.8    6.4  SIO wrt ITRF97
 MAS1     6.8    1.3    0.5    2.0   15.6    4.3  SIO wrt ITRF97
 FORT     6.7    2.9  -17.0    5.9   -9.9   10.8  SIO wrt ITRF97
 THU1    -1.8    2.0   -0.9    2.2   17.3    6.0  SIO wrt ITRF97
 WES2    -2.4    1.4    5.2    2.2   17.8    4.3  SIO wrt ITRF97
 GODE     1.2    1.4    2.5    2.3    6.7    4.6  SIO wrt ITRF97
 PIE1    -2.8    1.4    5.4    2.2    2.7    4.5  SIO wrt ITRF97
 KOKB   -12.0    1.7   -1.2    2.6   -7.2    5.0  SIO wrt ITRF97
 HOB2     4.2    1.7   -2.3    2.6   20.5    5.3  SIO wrt ITRF97
 TSKB     2.6    2.3  -10.5    2.7  -11.8    5.6  SIO wrt ITRF97
 PERT    -1.3    1.6    4.7    2.8   -6.7    6.7  SIO wrt ITRF97
 KERG     1.5    2.2    4.3    3.1  -14.5    7.2  SIO wrt ITRF97
 MATE    -3.1    1.7    1.4    2.2   -7.6    6.3  SIO wrt ITRF97
 GRAZ     0.4    1.6   -1.8    1.8   -5.8    5.4  SIO wrt ITRF97
 POTS    -2.2    1.1   -1.5    1.3   -8.6    3.2  SIO wrt ITRF97
 WTZR    -0.7    1.1   -0.1    1.4    2.6    3.6  SIO wrt ITRF97
 ONSA     0.9    1.6   -0.7    1.6  -12.5    4.8  SIO wrt ITRF97
 KOSG    -0.9    1.6    1.7    1.7   -5.8    5.2  SIO wrt ITRF97
 Reference sites NOT used 
 
 CENTER NGS
 -------------------
 VARIANCE RESCALING FACTOR FOR NGS 277.2
 
 Transformation of loose solution NGS to ITRF97
 -----------------------------------------------
 For   38 Sites, RMS after 7 parameter transformation   7.2 mm  NGS wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    3.5   11.9     33.2   12.3     12.2   41.9  -2.020  0.650  NGS  CoM
 
 Adjustments to core site positions for NGS
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     3.1    2.9   -4.2    4.4   -8.0    8.8  NGS wrt ITRF97
 MAS1     2.5    4.0  -13.9    5.9    8.7   10.5  NGS wrt ITRF97
 KOUR     8.9    6.1  -16.2    7.8   14.2   11.2  NGS wrt ITRF97
 BRMU     4.4    3.0    4.0    4.5    9.4    8.5  NGS wrt ITRF97
 THU1    -0.8    2.6   -0.9    2.8   16.7    7.7  NGS wrt ITRF97
 AREQ    22.0   10.4   -0.8   11.3   26.1   12.0  NGS wrt ITRF97
 WES2     0.7    2.6   11.7    4.0   24.4    7.0  NGS wrt ITRF97
 GODE     4.7    2.5    7.5    3.9   16.0    7.9  NGS wrt ITRF97
 ALGO     5.8    2.5    7.5    3.7   20.3    6.8  NGS wrt ITRF97
 NLIB     3.2    2.2    6.8    3.7   25.4    8.0  NGS wrt ITRF97
 MDO1     4.4    2.8    9.7    4.2    4.8    9.6  NGS wrt ITRF97
 PIE1     1.1    2.5   10.2    4.1    6.7    8.9  NGS wrt ITRF97
 YELL    -1.0    2.3   -3.9    3.3    3.0    6.7  NGS wrt ITRF97
 GOL2     0.0    2.7   -7.8    4.5    7.2    8.8  NGS wrt ITRF97
 DRAO     0.4    2.1   -1.3    3.8   -4.5    7.3  NGS wrt ITRF97
 FAIR    -0.9    3.9   -1.6    6.7  -16.5   13.6  NGS wrt ITRF97
 KOKB   -14.7    5.9   11.7   10.1  -16.9   12.9  NGS wrt ITRF97
 MAC1     1.4    4.3  -22.5    7.0   -1.3   10.3  NGS wrt ITRF97
 TID2     6.4    3.5   -8.9    6.1    7.1   10.6  NGS wrt ITRF97
 HOB2     6.9    3.3  -13.4    5.8    7.6    9.8  NGS wrt ITRF97
 TSKB    -8.8    5.5    3.9    7.0  -20.9   11.0  NGS wrt ITRF97
 PERT     2.5    3.4    6.2    5.8    2.4   11.5  NGS wrt ITRF97
 YAR1     2.8    3.5   10.2    5.4    3.0   10.2  NGS wrt ITRF97
 IRKT    -3.0    4.2   -4.3    4.8  -23.2    9.2  NGS wrt ITRF97
 LHAS   -18.2    6.0    3.6    7.9  -41.0   14.5  NGS wrt ITRF97
 DAV1    11.1    6.4   11.7    7.8   15.7   11.6  NGS wrt ITRF97
 KERG     8.0    4.8   11.5    7.2    6.0   11.1  NGS wrt ITRF97
 MALI    -6.2    7.8   -1.9   18.8   34.5   25.7  NGS wrt ITRF97
 MATE    -6.9    3.2   -3.7    4.8  -23.4    9.5  NGS wrt ITRF97
 GRAZ    -2.0    2.8   -5.7    3.9  -17.6    8.3  NGS wrt ITRF97
 POTS    -3.1    2.4   -6.2    3.3  -20.2    7.6  NGS wrt ITRF97
 WTZR     0.2    2.6   -4.8    3.6  -13.8    8.3  NGS wrt ITRF97
 ONSA     0.5    2.3   -4.7    3.0  -23.4    7.5  NGS wrt ITRF97
 NYAL     5.3    2.6    0.8    2.7   20.7    8.6  NGS wrt ITRF97
 KOSG     0.4    2.4   -1.2    3.3  -24.3    7.6  NGS wrt ITRF97
 Reference sites NOT used 
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 31.216
 
 Transformation of loose solution ESA to ITRF97
 -----------------------------------------------
 For   32 Sites, RMS after 7 parameter transformation   4.8 mm  ESA wrt ITRF97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   10.6    5.2     -7.3    5.3      6.7   14.1  -1.573  0.256  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     2.5    1.7    4.0    3.4   -4.0    7.0  ESA wrt ITRF97
 MAS1     2.5    1.3    2.1    2.8    9.2    5.8  ESA wrt ITRF97
 FORT    -6.0    2.1  -11.8    8.2  -17.0   13.8  ESA wrt ITRF97
 KOUR     0.9    1.3   -4.5    3.0    6.0    5.5  ESA wrt ITRF97
 BRMU     0.8    1.5    2.4    3.8   13.9    8.4  ESA wrt ITRF97
 THU1    -1.4    3.7   -0.7    4.6    2.6   12.2  ESA wrt ITRF97
 SANT    -2.8    2.6   -1.4    4.6  -37.7    7.0  ESA wrt ITRF97
 AREQ    -1.8    1.7   -3.8    3.4  -20.3    5.5  ESA wrt ITRF97
 GODE     0.0    2.4   13.5    4.9   13.6    7.2  ESA wrt ITRF97
 ALGO     3.1    1.4    7.9    2.6   27.6    4.6  ESA wrt ITRF97
 MDO1     3.5    2.6    6.4    6.1    5.5   12.9  ESA wrt ITRF97
 PIE1    -0.2    1.7    6.2    3.7    8.9    7.5  ESA wrt ITRF97
 YELL     0.4    2.1    0.9    3.4    1.6    6.2  ESA wrt ITRF97
 GOL2     0.5    1.8  -13.5    4.4    8.6    7.7  ESA wrt ITRF97
 DRAO     1.8    1.5   -2.9    2.7   -8.0    4.6  ESA wrt ITRF97
 FAIR     6.7    3.0    5.0    5.0   -8.9    9.0  ESA wrt ITRF97
 KOKB    -3.3    2.3    0.4    5.1    8.4    8.9  ESA wrt ITRF97
 TID2    -6.6    1.8   -1.7    3.6   16.7    7.4  ESA wrt ITRF97
 HOB2    -7.3    1.8   -9.8    3.0   31.3    5.8  ESA wrt ITRF97
 GUAM    -1.2    1.7    2.6    3.9   -6.2    6.2  ESA wrt ITRF97
 TSKB     6.9    2.4   -1.8    4.8  -16.2   12.9  ESA wrt ITRF97
 PERT    -0.3    2.0    2.4    4.7    6.6   10.3  ESA wrt ITRF97
 YAR1    -0.6    1.7    5.3    3.7    7.4    6.9  ESA wrt ITRF97
 IRKT     7.3    2.2   -1.9    3.7   -5.9    6.5  ESA wrt ITRF97
 MALI    -5.2    3.4    8.9   17.8   50.7   29.5  ESA wrt ITRF97
 GRAZ     2.0    1.7   -2.1    3.3  -12.7    6.4  ESA wrt ITRF97
 POTS    -1.3    1.4   -2.2    2.4  -20.9    4.6  ESA wrt ITRF97
 WTZR     4.0    1.7   -2.6    2.9    0.6    5.6  ESA wrt ITRF97
 ONSA     1.9    1.6   -3.2    2.5  -23.8    5.0  ESA wrt ITRF97
 NYAL     6.6    2.0    2.8    2.2    7.9    6.9  ESA wrt ITRF97
 KOSG     1.5    1.6    2.2    2.8  -11.2    5.5  ESA wrt ITRF97
 Reference sites NOT used 

 4.0 CENTER FITS TO COMBINED SOLUTION 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 82.77
 
 Transformation of loose solution JPL to COMB
 -----------------------------------------------
 For   33 Sites, RMS after 7 parameter transformation   1.5 mm  JPL wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -6.6    2.8      6.0    2.8     10.2    4.4  -3.086  0.142  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.4    0.9   -1.2    0.9   -8.6    4.9  JPL wrt COMB
 MAS1     0.3    0.9    1.1    1.7   -6.3    3.5  JPL wrt COMB
 KOUR    -2.7    1.0    2.0    2.3   -3.5    4.2  JPL wrt COMB
 OHIG     0.8    2.4    2.4    2.5   21.7    6.1  JPL wrt COMB
 BRMU    -1.0    0.7    2.3    1.0   -2.7    4.1  JPL wrt COMB
 THU1     0.1    0.7   -0.2    0.8    5.2    3.4  JPL wrt COMB
 SANT    -1.9    1.7   -0.5    1.9   -0.6    4.8  JPL wrt COMB
 AREQ    -1.9    1.2   -0.6    1.8   -1.0    3.6  JPL wrt COMB
 WES2    -0.4    0.7    1.7    0.8   -6.4    3.1  JPL wrt COMB
 GODE    -0.4    0.7    1.4    0.8   -3.2    2.9  JPL wrt COMB
 ALGO    -0.1    0.7    1.3    0.7   -5.1    2.9  JPL wrt COMB
 NLIB     0.6    0.7    0.0    0.7   -1.7    3.4  JPL wrt COMB
 MDO1    -0.3    0.8   -1.2    0.9    4.1    4.4  JPL wrt COMB
 PIE1    -0.5    0.8   -1.6    0.9    7.9    4.5  JPL wrt COMB
 YELL     1.1    0.9   -1.2    0.8    6.7    3.1  JPL wrt COMB
 GOL2     0.4    0.7   -2.1    0.9    1.6    3.9  JPL wrt COMB
 DRAO     1.5    0.8   -1.9    0.8    4.5    2.8  JPL wrt COMB
 KOKB     4.7    1.4   -2.4    2.5    0.6    7.0  JPL wrt COMB
 MAC1    -1.2    1.2    2.5    1.3   -2.9    3.6  JPL wrt COMB
 TID2     0.1    0.8    1.5    1.1   -6.3    3.8  JPL wrt COMB
 HOB2    -1.0    0.9    1.6    1.1   -6.8    3.1  JPL wrt COMB
 GUAM     3.2    1.4   -1.1    2.9   -0.2    4.5  JPL wrt COMB
 PERT     0.4    0.9   -1.3    1.2   -3.5    5.2  JPL wrt COMB
 YAR1     0.6    0.8   -1.6    1.1    1.3    4.3  JPL wrt COMB
 IRKT     0.9    1.2    4.0    1.3    7.1    4.0  JPL wrt COMB
 DAV1    -1.4    2.1   -1.8    2.0   13.8    7.8  JPL wrt COMB
 KERG    -1.0    1.4   -1.7    2.3    5.3    4.6  JPL wrt COMB
 MATE     1.5    1.2   -0.1    1.1   -5.1    7.3  JPL wrt COMB
 GRAZ     0.9    0.9   -0.3    0.8   -3.6    4.1  JPL wrt COMB
 POTS     0.5    0.7   -0.7    0.7   -0.5    2.8  JPL wrt COMB
 WTZR     0.9    0.8   -0.3    0.8   -2.5    3.1  JPL wrt COMB
 ONSA    -0.4    0.8   -0.3    0.7    0.2    2.9  JPL wrt COMB
 KOSG     0.0    0.7   -0.8    0.7    0.0    2.9  JPL wrt COMB
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 16.23
 
 Transformation of loose solution GFZ to COMB
 -----------------------------------------------
 For   22 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)
    2.8    9.0     -4.9    9.1     27.1    9.2  -2.442  0.291  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     1.7    1.7   -1.4    1.9   -5.9    6.9  GFZ wrt COMB
 FORT    -0.6    2.2    0.7    3.1    3.2   10.7  GFZ wrt COMB
 KOUR    -3.5    2.1   -0.6    2.6   -9.1    9.3  GFZ wrt COMB
 OHIG     1.9    3.2   -2.5    2.5  -10.0    9.7  GFZ wrt COMB
 SANT     0.1    2.1    2.2    1.9   11.0    7.2  GFZ wrt COMB
 AREQ     1.4    1.9    4.0    2.0    6.4    7.7  GFZ wrt COMB
 ALGO    -1.6    1.9   -2.3    1.5  -12.8    6.3  GFZ wrt COMB
 MDO1     1.3    5.3    1.3    4.7   18.7   20.7  GFZ wrt COMB
 YELL    -1.7    2.2   -0.7    1.7   -1.9    7.2  GFZ wrt COMB
 FAIR    -0.8    2.0   -1.0    1.7   -6.1    7.2  GFZ wrt COMB
 KOKB    -0.1    1.9    1.8    2.4   -1.9    7.5  GFZ wrt COMB
 MAC1     4.1    2.7    1.9    2.0   -4.6    7.6  GFZ wrt COMB
 HOB2     6.1    2.9    1.3    2.3   -2.6   10.0  GFZ wrt COMB
 GUAM    -0.3    1.8   -0.9    1.9   -3.4    7.3  GFZ wrt COMB
 TSKB    -0.7    2.2   -0.5    2.0   15.1    8.8  GFZ wrt COMB
 YAR1    -2.2    2.0    0.3    2.2  -10.1    8.2  GFZ wrt COMB
 IRKT    -2.0    2.2   -2.3    1.8   -1.0    7.1  GFZ wrt COMB
 DAV1     1.7    3.7    0.1    3.3   11.2   12.0  GFZ wrt COMB
 KERG     1.7    2.4   -3.6    2.3   10.1    7.4  GFZ wrt COMB
 MALI    -0.1    2.9   -3.4    9.4   12.6   17.9  GFZ wrt COMB
 WTZR    -0.6    1.9    1.1    1.7   -2.6    6.5  GFZ wrt COMB
 ONSA     1.7    2.0    1.3    1.6    0.4    6.3  GFZ wrt COMB
 Reference sites NOT used 
 
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 170.95
 
 Transformation of loose solution COD to COMB
 -----------------------------------------------
 For   31 Sites, RMS after 7 parameter transformation   2.1 mm  COD wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    2.2    1.1     -2.3    1.0      6.4    1.2  -1.858  0.192  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.3    1.7    2.0    1.5    5.6    6.0  COD wrt COMB
 MAS1     1.1    1.3    1.4    1.4    2.0    5.1  COD wrt COMB
 KOUR    -7.5    1.8   -2.4    2.3    8.1    8.2  COD wrt COMB
 OHIG     3.6    2.3    0.4    1.7   -9.2    7.5  COD wrt COMB
 BRMU     0.4    1.4   -1.3    1.5    2.4    6.1  COD wrt COMB
 SANT     1.4    1.8    0.7    1.5   14.1    5.6  COD wrt COMB
 AREQ     1.2    1.5    0.8    1.4   11.4    5.2  COD wrt COMB
 WES2    -1.3    1.5   -1.4    1.3   -0.5    5.0  COD wrt COMB
 ALGO    -2.3    1.4   -1.7    1.2   -2.8    4.7  COD wrt COMB
 NLIB    -1.6    1.6    1.1    1.5   -2.1    6.3  COD wrt COMB
 MDO1    -1.4    1.5   -0.3    1.6  -12.0    6.3  COD wrt COMB
 YELL    -1.3    1.7    1.0    1.5   -6.5    5.3  COD wrt COMB
 GOL2    -0.5    1.6   -1.4    2.2   -5.0    6.2  COD wrt COMB
 DRAO    -1.1    1.5    2.1    1.5   -4.2    4.8  COD wrt COMB
 FAIR    -0.8    1.9   -0.2    1.7   -3.8    6.1  COD wrt COMB
 KOKB    -2.9    1.7   -0.9    2.8   -1.4    6.4  COD wrt COMB
 MAC1     3.2    1.7    1.9    1.5    0.1    5.4  COD wrt COMB
 TID2     3.4    1.6    7.4    2.4    5.3    5.9  COD wrt COMB
 HOB2     2.6    1.5    3.0    1.5   -6.3    5.2  COD wrt COMB
 GUAM     0.0    1.9   -6.7    2.4   10.4    7.0  COD wrt COMB
 TSKB    -3.8    3.5   -3.8    3.2    6.5   15.5  COD wrt COMB
 YAR1     1.3    1.6   -3.0    2.0  -13.6    6.5  COD wrt COMB
 IRKT    -1.7    1.8   -2.2    1.5    3.4    5.4  COD wrt COMB
 DAV1     0.9    1.9   -2.3    1.6  -18.4    6.8  COD wrt COMB
 KERG     1.8    1.7   -2.0    1.6   -2.2    5.3  COD wrt COMB
 ZWEN     0.3    2.2    3.9    2.1   -5.3    6.7  COD wrt COMB
 MATE     0.4    3.5    0.5    6.1    8.7   10.6  COD wrt COMB
 POTS     0.9    1.5    1.1    1.2    5.3    4.7  COD wrt COMB
 WTZR    -2.1    1.5    0.6    1.2    5.3    5.0  COD wrt COMB
 ONSA     1.5    1.5    0.7    1.2    4.9    4.8  COD wrt COMB
 KOSG    -0.5    1.6    1.3    1.3    3.2    5.2  COD wrt COMB
 Reference sites NOT used 
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 2.15
 
 Transformation of loose solution SIO to COMB
 -----------------------------------------------
 For   19 Sites, RMS after 7 parameter transformation   2.2 mm  SIO wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -5.4    5.8     21.8    5.8    -59.6   16.0  -1.732  0.302  SIO  CoM
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -0.5    1.8    2.2    2.0    3.5    6.4  SIO wrt COMB
 MAS1     0.1    1.3    1.3    2.1    8.8    4.4  SIO wrt COMB
 FORT     8.0    2.9   -8.4    5.9    1.7   10.8  SIO wrt COMB
 THU1    -0.3    2.0   -2.1    2.2   -0.4    6.0  SIO wrt COMB
 WES2     2.0    1.4   -1.1    2.2    4.9    4.3  SIO wrt COMB
 GODE     1.8    1.4   -1.2    2.3    2.2    4.6  SIO wrt COMB
 PIE1     0.5    1.4    2.1    2.2   -6.2    4.6  SIO wrt COMB
 KOKB    -7.8    1.7    2.2    2.7   -5.6    5.0  SIO wrt COMB
 HOB2     4.5    1.7   -1.2    2.6    3.9    5.3  SIO wrt COMB
 TSKB    -1.1    2.3    1.1    2.7  -15.7    5.6  SIO wrt COMB
 PERT     0.6    1.6    0.3    2.8   -1.5    6.7  SIO wrt COMB
 KERG     2.8    2.2    3.4    3.1  -12.9    7.2  SIO wrt COMB
 ZWEN    -2.9    3.3    4.9    5.1  -12.3    8.6  SIO wrt COMB
 MATE    -1.0    1.7   -1.6    2.2    4.0    6.3  SIO wrt COMB
 GRAZ    -1.2    1.6   -1.8    1.8    5.0    5.4  SIO wrt COMB
 POTS    -1.4    1.1    0.0    1.3    3.5    3.2  SIO wrt COMB
 WTZR    -2.7    1.1   -0.2    1.4    3.1    3.6  SIO wrt COMB
 ONSA    -0.5    1.6   -1.4    1.7    2.9    4.8  SIO wrt COMB
 KOSG    -1.8    1.6   -0.1    1.7    5.0    5.2  SIO wrt COMB
 Reference sites NOT used 
 
 CENTER NGS
 -------------------
 VARIANCE RESCALING FACTOR FOR NGS 277.2
 
 Transformation of loose solution NGS to COMB
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation   6.1 mm  NGS wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    4.3   11.7     29.9   12.1     14.0   42.0  -2.184  0.618  NGS  CoM
 
 Adjustments to core site positions for NGS
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -3.0    2.9   -6.1    4.6   -1.1    8.7  NGS wrt COMB
 MAS1    -4.8    3.9  -10.4    6.1    3.3   10.2  NGS wrt COMB
 FORT     4.5    6.4  -25.9   12.4    5.1   15.2  NGS wrt COMB
 KOUR     6.1    4.8   -5.4    6.5    9.9   10.4  NGS wrt COMB
 BRMU     3.4    2.7    6.9    4.2    4.9    8.1  NGS wrt COMB
 THU1     2.2    2.7   -2.4    2.8   -0.1    7.9  NGS wrt COMB
 SANT    20.4   12.1   -5.5   12.4   29.3   11.6  NGS wrt COMB
 AREQ    12.2    8.5   -4.7    9.5   26.2   11.3  NGS wrt COMB
 WES2     4.8    2.7    5.6    3.9   11.4    6.7  NGS wrt COMB
 GODE     4.7    2.5    4.0    3.9   11.3    7.6  NGS wrt COMB
 ALGO     5.3    2.7    4.3    3.8    5.9    6.6  NGS wrt COMB
 NLIB     4.1    2.4    6.9    3.9    8.4    7.8  NGS wrt COMB
 MDO1     4.0    2.7    8.0    4.4    4.1    9.3  NGS wrt COMB
 PIE1     3.0    2.5    5.9    4.4   -2.2    8.7  NGS wrt COMB
 YELL    -0.2    2.5   -2.0    3.5   -3.7    6.8  NGS wrt COMB
 GOL2     0.7    2.7    6.0    4.8    0.7    8.6  NGS wrt COMB
 DRAO    -1.3    2.4   -0.5    4.1   -0.6    7.3  NGS wrt COMB
 FAIR    -3.8    4.1   -5.2    6.8  -10.3   13.7  NGS wrt COMB
 KOKB   -13.1    5.9   12.9   10.3  -13.2   12.7  NGS wrt COMB
 MAC1     3.4    5.5  -18.4    8.1    0.1   10.5  NGS wrt COMB
 TID2     6.4    4.0  -11.4    6.9   -1.1   11.1  NGS wrt COMB
 HOB2     7.5    4.1  -15.3    6.7   -3.0   10.3  NGS wrt COMB
 TSKB   -15.0    5.6   14.7    7.1  -20.8   10.7  NGS wrt COMB
 PERT     5.4    3.6    0.8    6.2   14.3   12.1  NGS wrt COMB
 YAR1     5.0    3.7    1.7    5.8   10.6   10.8  NGS wrt COMB
 IRKT    -5.4    4.3    1.5    5.0  -26.0    9.0  NGS wrt COMB
 LHAS   -15.7    6.0    0.3    8.0  -26.1   14.3  NGS wrt COMB
 DAV1    17.7    7.9    7.3    8.9   10.8   11.6  NGS wrt COMB
 KERG    11.8    6.0   12.4    8.2   14.1   11.4  NGS wrt COMB
 MALI    -3.5    7.7   13.5   19.3  -10.5   25.8  NGS wrt COMB
 ZWEN    -1.8    3.5   -6.1    5.2   -1.4    9.6  NGS wrt COMB
 MATE    -5.4    3.2   -3.8    4.9   -9.3    9.3  NGS wrt COMB
 GRAZ    -4.1    2.8   -3.0    4.1   -4.5    8.2  NGS wrt COMB
 POTS    -2.6    2.5   -2.1    3.4   -6.1    7.6  NGS wrt COMB
 WTZR    -2.2    2.6   -2.3    3.7  -11.2    8.2  NGS wrt COMB
 ONSA    -1.1    2.4   -2.9    3.1   -6.1    7.5  NGS wrt COMB
 NYAL     0.6    2.5   -1.2    2.7    4.5    8.8  NGS wrt COMB
 KOSG    -0.7    2.5   -0.5    3.4  -11.8    7.6  NGS wrt COMB
 Reference sites NOT used 
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 31.216
 
 Transformation of loose solution ESA to COMB
 -----------------------------------------------
 For   31 Sites, RMS after 7 parameter transformation   3.8 mm  ESA wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    9.9    5.2     -8.2    5.3      7.4   14.1  -1.666  0.268  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -1.7    1.7   -0.3    3.5    4.4    7.0  ESA wrt COMB
 MAS1    -2.2    1.3    2.7    2.8    5.6    5.7  ESA wrt COMB
 FORT    -2.4    2.1   -3.8    8.2   -2.2   13.7  ESA wrt COMB
 KOUR     2.4    1.3    3.7    3.0    4.1    5.5  ESA wrt COMB
 BRMU     2.7    1.5    3.3    3.8   11.9    8.4  ESA wrt COMB
 THU1     2.7    3.7   -3.0    4.6  -13.1   12.2  ESA wrt COMB
 AREQ    -6.4    1.7   -9.2    3.4  -18.4    5.5  ESA wrt COMB
 GODE     2.5    2.4    8.2    4.9   11.1    7.2  ESA wrt COMB
 ALGO     4.8    1.4    3.1    2.6   15.3    4.6  ESA wrt COMB
 MDO1     5.4    2.6    3.3    6.1    6.6   12.9  ESA wrt COMB
 PIE1     3.6    1.7    0.4    3.7    1.6    7.5  ESA wrt COMB
 YELL     2.1    2.1    1.3    3.4   -4.0    6.2  ESA wrt COMB
 GOL2     2.9    1.8   -1.1    4.3    3.4    7.7  ESA wrt COMB
 DRAO     1.4    1.5   -3.6    2.7   -2.8    4.6  ESA wrt COMB
 FAIR     4.1    3.0   -0.1    5.0   -2.3    9.0  ESA wrt COMB
 KOKB    -1.4    2.3    0.7    5.0   11.4    8.9  ESA wrt COMB
 TID2   -10.5    2.0   -4.1    3.9    5.4    7.5  ESA wrt COMB
 GUAM    -0.7    1.7   12.4    3.9   -1.3    6.2  ESA wrt COMB
 TSKB    -0.3    2.4    7.2    4.7  -18.0   12.8  ESA wrt COMB
 PERT    -1.5    2.1   -5.8    4.7   15.2   10.4  ESA wrt COMB
 YAR1    -2.3    1.8   -5.9    3.7   11.6    7.0  ESA wrt COMB
 IRKT     4.3    2.2    2.4    3.7  -10.0    6.5  ESA wrt COMB
 MALI    -1.9    3.4   18.9   17.7    4.8   29.5  ESA wrt COMB
 ZWEN     1.5    3.8  -14.2    5.5    2.4    8.9  ESA wrt COMB
 GRAZ     1.1    1.7   -1.4    3.3    1.3    6.3  ESA wrt COMB
 POTS     0.4    1.4    0.4    2.3   -5.8    4.6  ESA wrt COMB
 WTZR     2.9    1.7   -1.8    2.8    4.1    5.6  ESA wrt COMB
 ONSA     1.4    1.5   -2.7    2.4   -5.5    5.0  ESA wrt COMB
 NYAL     2.5    2.0    1.0    2.2   -7.6    6.8  ESA wrt COMB
 KOSG     1.7    1.6    1.3    2.8    2.5    5.5  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)
51664.50   88755  337856  2448155  13260    38    41   94308      69 142 40  0    721   -517     78     81     .049   .000   .000
51665.50   89369  337427  2434235  14475    31    33   94308      57 142 40  0    510   -340     54     55     .032   .000   .000
51666.50   89866  337082  2419398  15058    31    32   94309      56 142 40  0    483   -354     52     53     .037   .000   .000
51667.50   90024  336591  2404360  14862    31    32   94309      57 142 40  0   -167   -627     51     52     .032   .000   .000
51668.50   89739  335722  2390055  13631    30    32   94309      54 142 40  0   -403  -1113     51     52     .030   .000   .000
51669.50   89316  334586  2377241  11971    31    33   94309      55 142 40  0   -439  -1151     52     54     .025   .000   .000
51670.50   88865  333641  2366165  10234    34    37   94309      65 142 40  0   -466   -743     72     76     .029   .000   .000