[IGSREPORT-8288] Wk 1113 MIT T2 Analysis Report

Tom Herring tah at mtglas.mit.edu
Wed May 23 23:45:42 PDT 2001


******************************************************************************
IGS Electronic Report   23 May 23:46:26 PDT 2001      Message Number 8288
******************************************************************************

Author: Thomas Herring

********************************************************************************
MIT ANALYSIS REPORT GPS-WEEK 1113    Dates: 01may06  to  01may12 
********************************************************************************

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

PRODUCTS GENERATED:
The following products are generated and uploaded into CDDIS @ NASA/GSFC
   MIT1113g.SNX   Combined sinex file from all available analysis centers
   MIT1113g.SUM   Name of this summary file
   MIT1113g.RES   File of the individual AC position estimates residuals 
                  to the combined solution for the week. 

0.0 Starting Week 1110, we stopped applied a pole-tide correction to
    SIO sinex files because this correction is already made in their
    analysis.
0.1 Starting Week 1066, we adopted the IGS realization of the ITRF97
    (referred to as IGS97).  We also replaced our constrained solution
    a loose solution with translation (+-1 mm) and orientation (+-0.1 mas)
    constraints applied.
0.2 Starting Week 1020, we adopted the ITRF97 reference frame
0.3 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    127     .7     .9      .9     .9     3.5    1.1  
 JPL     71    2.3     .8     2.0     .8     9.8    1.0  
 SIO      0     .0     .0      .0     .0      .0     .0  
 EMR     50    2.4     .8     3.2     .8     7.6     .9  
 ESA     54    3.4    1.7     4.1    1.1    10.4    1.5  
 GFZ     70    1.7    1.5     1.4    1.4     5.6    1.4  
 NGS     72    7.2    1.9     8.2    1.6    21.7    2.2  
 
CENTER SINEX ERRORS: (corrected during processing).
 CNT  Site Type of Error           Used values                       IGS.SNX values
 COM  LAE1 Eccentricity: Used          .0000   .0000   .0500 Real   .0000   .0000   .0150  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  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  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  THTI Used TRM29659.00      dL1   .0000   .0000   .1098  dL2   .0000   .0000   .1280  m
 NOA  THTI Real TRM29659.00      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
 NOA  WUHN Used ASH700936E       dL1   .0000   .0000   .1081  dL2   .0000   .0000   .1256  m
 NOA  WUHN Real ASH700936E       dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 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  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
 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
 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 IGS97 
 Transformation of loose solution COMBINED to IGS97
 -----------------------------------------------
 For   42 Sites, RMS after 7 parameter transformation   3.0 mm  COMBINED wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    1.1    1.6     -6.0    1.7      6.1    2.8  -2.488  0.070  COMBINED  CoM
 
 Adjustments to core site positions for COMBINED
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     1.9    0.4   -3.4    0.6   -2.5    1.8  COMBINED wrt IGS97
 FORT    -5.8    1.7    5.7    4.0   -4.5    8.4  COMBINED wrt IGS97
 KOUR     2.1    0.6   -3.6    1.3  -12.7    2.8  COMBINED wrt IGS97
 OHIG    -8.9    0.9   -5.5    0.9   -7.7    2.8  COMBINED wrt IGS97
 BRMU    -0.1    0.5    0.0    0.6   -2.9    2.3  COMBINED wrt IGS97
 SANT    -2.7    0.9    4.3    0.9  -14.8    2.6  COMBINED wrt IGS97
 AREQ    -4.0    0.6    8.2    0.8  -13.9    2.0  COMBINED wrt IGS97
 WES2    -3.5    0.5   -4.9    0.5  -12.6    2.9  COMBINED wrt IGS97
 GODE    -1.1    0.5   -3.3    0.5    4.9    3.0  COMBINED wrt IGS97
 ALGO    -2.8    0.4    0.6    0.4   -1.4    1.6  COMBINED wrt IGS97
 NLIB     3.0    0.5    2.9    0.5  -11.7    2.8  COMBINED wrt IGS97
 MDO1     3.3    0.5    2.7    0.6    7.2    2.5  COMBINED wrt IGS97
 PIE1     4.4    0.5    1.8    0.6    9.1    2.4  COMBINED wrt IGS97
 YELL    -0.1    0.5    2.8    0.4   -3.6    1.7  COMBINED wrt IGS97
 GOL2     2.7    0.9  -11.0    2.3   11.8    4.6  COMBINED wrt IGS97
 DRAO     4.3    0.4   -0.4    0.5   -2.4    1.6  COMBINED wrt IGS97
 FAIR     2.2    0.7    1.0    0.7   15.1    3.0  COMBINED wrt IGS97
 KOKB     6.4    0.7   -3.0    1.3    7.2    3.0  COMBINED wrt IGS97
 CHAT    -1.8    0.6    2.3    0.7  -11.8    2.1  COMBINED wrt IGS97
 AUCK    -1.6    0.6    2.3    0.8  -11.4    2.6  COMBINED wrt IGS97
 MCM4    -3.4    1.0   -1.3    1.0   17.8    4.5  COMBINED wrt IGS97
 MAC1     0.1    0.5   -0.2    0.5   -3.0    1.8  COMBINED wrt IGS97
 TIDB    -3.0    0.5   -0.2    0.5   11.3    1.9  COMBINED wrt IGS97
 HOB2    -3.7    0.6    1.4    0.5   10.9    2.3  COMBINED wrt IGS97
 GUAM     1.8    0.6   -0.2    0.8   -7.4    2.2  COMBINED wrt IGS97
 SHAO     3.8    0.7    1.0    0.7   12.9    3.7  COMBINED wrt IGS97
 YAR1     0.1    0.7   -4.8    0.8   10.1    3.4  COMBINED wrt IGS97
 CAS1    -4.2    0.6   -0.5    0.6   14.6    1.9  COMBINED wrt IGS97
 IRKT     2.0    0.6   -0.9    0.6   24.0    1.9  COMBINED wrt IGS97
 LHAS     2.9    0.6   -2.5    0.8   -7.5    2.7  COMBINED wrt IGS97
 DAV1    -5.0    0.6   -0.2    0.6   11.2    2.0  COMBINED wrt IGS97
 KERG    -3.0    0.7   -1.1    0.8   -5.4    2.2  COMBINED wrt IGS97
 BAHR     3.8    0.5    2.0    0.7    2.6    1.9  COMBINED wrt IGS97
 MALI    -5.7    0.7    7.6    1.2   19.8    3.1  COMBINED wrt IGS97
 TROM     2.0    0.9    1.1    1.2  -20.2    3.8  COMBINED wrt IGS97
 MATE     0.1    0.5    0.1    0.5   -8.4    2.3  COMBINED wrt IGS97
 GRAZ     4.3    0.5    1.7    0.5    0.0    2.4  COMBINED wrt IGS97
 POTS    -0.7    0.4   -2.3    0.4   -2.3    1.6  COMBINED wrt IGS97
 WTZR     1.0    0.4   -3.0    0.4   -3.0    1.5  COMBINED wrt IGS97
 ONSA     0.7    0.4   -1.3    0.4    4.4    1.6  COMBINED wrt IGS97
 NYAL     1.3    1.0    0.1    1.0  -17.9    4.1  COMBINED wrt IGS97
 WSRT     1.4    0.5   -2.3    0.4   -3.8    1.8  COMBINED wrt IGS97
 Reference sites NOT used 
 MADR     2.3    0.5   -2.9    0.5  -38.5    2.5  COMBINED wrt IGS97
 
 
 3.0 CENTER FITS TO IGS1997
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 60.57
 
 Transformation of loose solution COD to IGS97
 -----------------------------------------------
 For   38 Sites, RMS after 7 parameter transformation   3.2 mm  COD wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -7.8    2.3    -11.0    2.3      9.9    3.4  -2.524  0.113  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     0.8    0.7   -3.4    1.0   -7.2    2.8  COD wrt IGS97
 KOUR     1.4    0.9   -2.7    2.1   -9.3    3.7  COD wrt IGS97
 BRMU     0.0    0.7    1.4    1.0   -9.7    3.7  COD wrt IGS97
 SANT    -4.7    1.7    0.5    2.0  -24.2    3.9  COD wrt IGS97
 AREQ    -4.7    1.3    6.5    1.8  -20.0    3.3  COD wrt IGS97
 WES2    -3.3    0.7   -4.3    0.8  -19.6    4.2  COD wrt IGS97
 GODE    -1.1    0.6   -3.0    0.8    0.9    3.5  COD wrt IGS97
 ALGO    -2.4    0.6    0.9    0.7   -4.8    2.6  COD wrt IGS97
 NLIB     3.5    0.7    2.0    0.8   -5.2    4.3  COD wrt IGS97
 MDO1     3.2    0.6    1.8    0.8   15.1    3.6  COD wrt IGS97
 PIE1     4.2    0.6    0.8    0.8   12.3    3.4  COD wrt IGS97
 YELL     0.0    0.8    2.3    0.7   -1.0    2.4  COD wrt IGS97
 DRAO     3.9    0.7   -2.0    0.7    2.1    2.5  COD wrt IGS97
 FAIR     1.4    0.9    0.7    0.9   18.8    3.6  COD wrt IGS97
 KOKB     6.6    1.0   -3.4    1.9    6.6    3.8  COD wrt IGS97
 CHAT    -1.2    0.9    2.1    1.5  -13.6    3.3  COD wrt IGS97
 AUCK    -1.2    0.9    2.1    1.5  -15.6    3.7  COD wrt IGS97
 MCM4     0.9    1.7   -1.4    2.6   20.9    8.5  COD wrt IGS97
 MAC1     0.0    0.8   -0.8    1.0   -3.6    2.8  COD wrt IGS97
 TIDB    -3.4    0.7   -1.2    0.9    7.7    2.7  COD wrt IGS97
 HOB2    -4.0    0.8    0.8    0.9    9.2    3.2  COD wrt IGS97
 GUAM    -0.6    1.2    1.8    2.3   -2.2    3.8  COD wrt IGS97
 SHAO     3.1    1.1    2.5    1.2   17.6    4.7  COD wrt IGS97
 YAR1    -0.7    1.0   -6.6    1.2   20.2    5.8  COD wrt IGS97
 CAS1    -2.3    0.9   -0.3    1.3   22.8    2.8  COD wrt IGS97
 IRKT     1.9    0.9    0.1    1.0   22.1    3.3  COD wrt IGS97
 LHAS     1.8    1.0    0.0    1.5   -7.1    3.7  COD wrt IGS97
 DAV1    -3.5    1.1    2.0    1.2   19.8    2.9  COD wrt IGS97
 KERG    -1.6    1.1    0.9    1.8   -4.7    4.2  COD wrt IGS97
 BAHR     2.1    0.8    1.4    1.4   -8.0    3.0  COD wrt IGS97
 MATE    -1.1    0.6    0.6    0.8  -10.9    2.8  COD wrt IGS97
 GRAZ     3.5    0.7    2.4    0.7   -2.1    2.9  COD wrt IGS97
 POTS    -1.3    0.6   -1.7    0.6   -4.0    2.3  COD wrt IGS97
 WTZR     0.3    0.6   -2.3    0.7   -5.9    2.3  COD wrt IGS97
 ONSA    -0.1    0.7   -0.6    0.6    4.7    2.6  COD wrt IGS97
 WSRT     0.8    0.6   -1.9    0.6   -6.0    2.2  COD wrt IGS97
 Reference sites NOT used 
 MADR     2.2    0.7   -1.9    0.8  -47.6    3.3  COD wrt IGS97
 
 CENTER EMR
 -------------------
 VARIANCE RESCALING FACTOR FOR EMR 5.95
 
 Transformation of loose solution EMR to IGS97
 -----------------------------------------------
 For   25 Sites, RMS after 7 parameter transformation   3.4 mm  EMR wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
  -23.2   11.0     19.6   11.5     15.0   27.6  -2.263  0.313  EMR  CoM
 
 Adjustments to core site positions for EMR
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1    -1.0    2.1   -4.6    3.0    0.1    6.2  EMR wrt IGS97
 FORT    -3.8    4.1    4.0    9.5    3.1   15.9  EMR wrt IGS97
 OHIG    -7.1    4.2   -7.5    4.2   -6.8   10.2  EMR wrt IGS97
 BRMU    -5.6    2.0    3.4    3.3    2.4    6.4  EMR wrt IGS97
 AREQ    -7.0    4.0    6.4    6.8   -3.5   11.8  EMR wrt IGS97
 ALGO    -2.9    1.8   -0.3    2.7   -4.6    5.4  EMR wrt IGS97
 PIE1     4.7    2.1   -0.3    3.5   -4.3    6.7  EMR wrt IGS97
 YELL     0.1    2.3   -1.3    3.3   -7.1    6.6  EMR wrt IGS97
 DRAO     4.0    1.9   -1.3    2.7   -6.3    5.6  EMR wrt IGS97
 FAIR     0.7    3.4   -9.0    5.1    6.7   10.2  EMR wrt IGS97
 KOKB     5.0    3.5   -4.1    5.9    0.4   10.9  EMR wrt IGS97
 CHAT    -2.8    3.4    5.7    5.4   -7.4    9.7  EMR wrt IGS97
 AUCK    -0.6    3.6   -0.1    6.2   -9.2   11.4  EMR wrt IGS97
 MCM4    -3.2    5.8    1.3    6.9   17.7   17.5  EMR wrt IGS97
 MAC1     4.3    2.7    1.3    3.7   -6.4    7.7  EMR wrt IGS97
 TIDB    -3.4    3.2    0.0    4.8   16.2   10.3  EMR wrt IGS97
 GUAM     5.0    3.2    3.1    4.9  -22.7    9.3  EMR wrt IGS97
 YAR1    -3.1    3.2    0.2    5.5   -8.9   11.0  EMR wrt IGS97
 IRKT     1.8    2.9    3.2    3.5   30.1    6.6  EMR wrt IGS97
 DAV1    -1.3    3.4    1.9    4.0    4.8    9.0  EMR wrt IGS97
 KERG    -0.6    3.4  -11.0    4.6    4.1    8.5  EMR wrt IGS97
 BAHR     6.1    4.1    2.6    7.4   16.8   15.2  EMR wrt IGS97
 MATE     1.2    2.3    3.4    3.2   -2.1    6.6  EMR wrt IGS97
 ONSA     3.1    2.1   -4.1    2.6    8.1    5.7  EMR wrt IGS97
 NYAL     1.7    2.6    0.2    2.8  -11.6    8.6  EMR wrt IGS97
 Reference sites NOT used 
 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 16.48
 
 Transformation of loose solution JPL to IGS97
 -----------------------------------------------
 For   26 Sites, RMS after 7 parameter transformation   3.4 mm  JPL wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -6.9    8.4      1.4    8.9     17.6    8.9  -2.227  0.286  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     2.5    1.7   -5.6    2.0   -2.0    6.6  JPL wrt IGS97
 FORT    -3.6    3.3    1.6    4.8   -7.6   16.2  JPL wrt IGS97
 OHIG    -0.9    3.2   -7.3    2.8   -4.6    9.8  JPL wrt IGS97
 BRMU    -2.4    4.4    0.7    4.2  -20.2   18.5  JPL wrt IGS97
 SANT     1.1    3.1    7.0    2.6    8.1   10.3  JPL wrt IGS97
 AREQ    -1.3    2.3    7.5    2.1    5.5    8.0  JPL wrt IGS97
 ALGO    -3.2    2.0   -0.5    1.5  -10.8    6.1  JPL wrt IGS97
 YELL     0.8    2.3   -0.1    1.8   -9.7    7.7  JPL wrt IGS97
 DRAO     4.5    4.8   -2.7    3.9  -14.0   14.7  JPL wrt IGS97
 FAIR    -0.3    3.4   -2.5    2.6    0.3   13.2  JPL wrt IGS97
 KOKB     1.5    2.7   -7.3    2.9    1.1   10.4  JPL wrt IGS97
 AUCK    -0.2    2.0    1.3    2.0  -10.0    7.0  JPL wrt IGS97
 MCM4    -2.4    5.7    4.9    5.3   18.9   20.1  JPL wrt IGS97
 MAC1     4.6    2.3   -0.8    1.7  -13.7    6.7  JPL wrt IGS97
 TIDB    -0.4    1.7   -1.7    1.5   19.7    6.1  JPL wrt IGS97
 GUAM     1.3    1.8   -3.3    1.8   -2.6    7.0  JPL wrt IGS97
 TSKB     5.8    2.1    9.4    2.1    1.0    7.9  JPL wrt IGS97
 YAR1     1.0    2.5   -3.3    3.2   -3.6   11.0  JPL wrt IGS97
 IRKT     0.3    2.1   -1.3    1.6   28.1    6.5  JPL wrt IGS97
 DAV1    -6.0    2.6   -2.0    2.4    9.9    8.8  JPL wrt IGS97
 KERG    -3.3    2.3   -5.8    2.1   -4.6    7.2  JPL wrt IGS97
 BAHR     3.1    1.8    1.4    1.9   13.2    6.8  JPL wrt IGS97
 MALI    -4.8    2.8   10.0    3.7   10.4   13.2  JPL wrt IGS97
 WTZR    -0.4    1.7   -3.2    1.5   -6.2    5.7  JPL wrt IGS97
 ONSA     2.1    1.9   -0.2    1.5   -0.8    6.0  JPL wrt IGS97
 NYAL     1.0    2.4    1.2    2.0  -12.4   12.8  JPL wrt IGS97
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 144.45
 
 Transformation of loose solution GFZ to IGS97
 -----------------------------------------------
 For   30 Sites, RMS after 7 parameter transformation   2.9 mm  GFZ wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    1.4 3552.7     -3.9 3552.7      3.1 3552.7  -2.897  0.122  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     3.0    0.9   -1.5    1.0    0.6    3.5  GFZ wrt IGS97
 KOUR    -1.0    1.4   -4.6    1.9  -19.7    6.6  GFZ wrt IGS97
 OHIG    -4.0    1.5   -6.8    1.2   -6.4    4.8  GFZ wrt IGS97
 BRMU    -0.1    0.9   -2.7    0.9   -0.5    3.9  GFZ wrt IGS97
 SANT     0.0    1.5    6.6    1.2    1.8    4.9  GFZ wrt IGS97
 AREQ    -1.9    1.1    6.6    1.0   -8.3    3.6  GFZ wrt IGS97
 WES2    -2.4    1.2   -6.4    1.0  -14.7    5.0  GFZ wrt IGS97
 ALGO    -3.6    0.9    0.0    0.8   -4.6    3.2  GFZ wrt IGS97
 NLIB     2.8    1.1    3.8    1.1  -24.9    4.7  GFZ wrt IGS97
 MDO1     3.7    0.9    1.5    1.0   -3.3    3.9  GFZ wrt IGS97
 YELL    -2.1    1.0    0.3    0.8   -8.7    3.2  GFZ wrt IGS97
 DRAO     4.3    1.0   -0.4    0.9   -9.0    3.1  GFZ wrt IGS97
 CHAT    -0.4    1.1    2.0    1.0  -13.1    3.7  GFZ wrt IGS97
 MCM4    -5.4    1.5   -0.6    1.2   16.7    7.0  GFZ wrt IGS97
 MAC1     3.6    1.0   -0.4    0.8   -1.1    3.3  GFZ wrt IGS97
 TIDB    -0.4    0.9   -0.6    0.8   15.5    3.3  GFZ wrt IGS97
 HOB2    -0.5    1.2    0.5    0.9    6.2    4.2  GFZ wrt IGS97
 GUAM     4.7    1.0   -1.0    1.0   -9.2    3.7  GFZ wrt IGS97
 YAR1     2.3    1.5   -3.6    1.6    3.1    6.6  GFZ wrt IGS97
 CAS1    -4.1    1.0   -0.2    0.8   10.1    3.5  GFZ wrt IGS97
 IRKT     0.2    1.1   -0.2    0.9   28.5    3.6  GFZ wrt IGS97
 LHAS     2.4    1.1   -2.6    1.1   -4.2    4.5  GFZ wrt IGS97
 DAV1    -4.7    1.0   -1.0    0.9    2.4    3.7  GFZ wrt IGS97
 KERG    -4.1    1.1   -0.4    1.0   -6.1    3.6  GFZ wrt IGS97
 BAHR     2.0    0.9    3.4    1.0    9.5    3.6  GFZ wrt IGS97
 MALI    -6.1    1.2    4.7    1.5   23.9    5.0  GFZ wrt IGS97
 POTS     0.8    0.9   -1.4    0.7    3.8    3.1  GFZ wrt IGS97
 WTZR     0.4    0.9   -2.3    0.8    2.1    3.1  GFZ wrt IGS97
 ONSA     3.1    1.0    0.2    0.8    6.9    3.3  GFZ wrt IGS97
 WSRT     2.0    0.9   -1.3    0.8    0.9    3.0  GFZ wrt IGS97
 Reference sites NOT used 
 MADR    -0.6    1.1   -4.2    1.0  -26.1    4.3  GFZ wrt IGS97
 
 CENTER NGS
 -------------------
 VARIANCE RESCALING FACTOR FOR NGS 250.6
 
 Transformation of loose solution NGS to IGS97
 -----------------------------------------------
 For   41 Sites, RMS after 7 parameter transformation   8.4 mm  NGS wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   19.9   11.9     14.4   12.7    -66.8   42.6  -2.502  0.455  NGS  CoM
 
 Adjustments to core site positions for NGS
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1    -6.0    4.4  -12.8    6.8    1.4   11.9  NGS wrt IGS97
 FORT    -9.4    5.8   24.6   14.0  -38.6   18.8  NGS wrt IGS97
 KOUR     5.0    4.1   -4.4    6.0  -45.2    9.8  NGS wrt IGS97
 OHIG   -27.9    8.5    6.7   10.3    0.0   14.3  NGS wrt IGS97
 BRMU    12.2    2.7    4.1    4.3   15.2    7.7  NGS wrt IGS97
 SANT   -12.4    6.8    2.6    9.0  -31.4   11.8  NGS wrt IGS97
 AREQ    -8.0    5.3   -2.8    7.5  -40.1    9.4  NGS wrt IGS97
 WES2     7.0    2.5    0.5    4.1   21.0    8.0  NGS wrt IGS97
 GODE    11.8    2.4   -1.2    3.7   22.2    7.3  NGS wrt IGS97
 ALGO     7.8    2.4    1.7    3.5   20.8    6.2  NGS wrt IGS97
 NLIB    14.6    2.5    3.7    4.2    8.6    8.0  NGS wrt IGS97
 MDO1    17.4    3.1   -2.0    5.0   28.2    9.3  NGS wrt IGS97
 PIE1    16.5    2.9   -1.4    4.7   24.9    8.3  NGS wrt IGS97
 YELL     3.2    2.9    5.4    4.1    7.1    6.9  NGS wrt IGS97
 GOL2    13.6    3.1  -11.2    4.8   29.1    8.6  NGS wrt IGS97
 DRAO    10.7    2.8    3.1    4.3   13.4    7.3  NGS wrt IGS97
 FAIR     6.9    6.2    6.5    9.2    5.7   16.7  NGS wrt IGS97
 KOKB     7.8    6.6   -2.5   10.9    7.1   16.5  NGS wrt IGS97
 CHAT   -11.3    5.0    2.1    6.7   -7.7   10.6  NGS wrt IGS97
 AUCK   -11.3    5.2   -4.6    6.6   -8.6   11.3  NGS wrt IGS97
 MCM4    -3.7    5.4   -9.8    6.8   37.5   15.2  NGS wrt IGS97
 MAC1    -7.4    3.4  -11.1    4.8   24.0    9.6  NGS wrt IGS97
 HOB2   -10.2    3.9  -11.7    6.4   45.9   12.3  NGS wrt IGS97
 GUAM   -11.5    5.9   21.4    9.0  -57.1   14.1  NGS wrt IGS97
 TSKB    10.5    4.4   21.1    6.5  -49.0   10.2  NGS wrt IGS97
 SHAO    -0.5    4.1   13.4    5.7  -27.6   10.6  NGS wrt IGS97
 YAR1    -9.6    4.4    6.3    7.1   35.5   13.3  NGS wrt IGS97
 CAS1     2.5    3.5   -2.0    4.8   45.3    9.0  NGS wrt IGS97
 IRKT     5.2    3.4    0.1    4.3  -10.3    7.9  NGS wrt IGS97
 LHAS    -5.2    3.9   -2.3    6.0  -46.6   11.6  NGS wrt IGS97
 DAV1     1.0    4.3    6.4    5.0   43.3    9.3  NGS wrt IGS97
 KERG    -7.8    4.1    5.4    5.3   26.9    8.9  NGS wrt IGS97
 BAHR    -4.9    4.4    3.7    6.4  -27.2    9.6  NGS wrt IGS97
 TROM     2.4    2.6   -5.0    2.9  -16.7    6.9  NGS wrt IGS97
 MATE    -1.5    3.2   -7.2    4.1  -20.5    8.6  NGS wrt IGS97
 GRAZ     3.8    2.9  -10.1    3.6  -11.5    8.1  NGS wrt IGS97
 POTS    -0.6    2.6  -12.1    3.3  -10.7    7.1  NGS wrt IGS97
 WTZR     1.7    2.7  -13.6    3.4  -15.8    7.2  NGS wrt IGS97
 ONSA     1.1    2.6  -11.9    3.2   -3.3    7.0  NGS wrt IGS97
 NYAL     2.3    2.9   -4.3    3.0  -15.1    9.2  NGS wrt IGS97
 Reference sites NOT used 
 MADR    -1.5    3.5  -12.4    5.5  -27.7    9.5  NGS wrt IGS97
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 26.992
 
 Transformation of loose solution ESA to IGS97
 -----------------------------------------------
 For   32 Sites, RMS after 7 parameter transformation   5.0 mm  ESA wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   17.4    4.9    -16.8    5.2    -11.3   13.5  -2.067  0.250  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     3.1    1.5   -3.4    3.4    3.8    5.5  ESA wrt IGS97
 FORT   -12.4    3.3    4.1   13.3    0.9   20.6  ESA wrt IGS97
 KOUR     7.3    2.8   -3.4    6.6  -14.2    9.3  ESA wrt IGS97
 BRMU     5.2    3.5   -9.8    9.2    6.8   17.6  ESA wrt IGS97
 SANT    -9.3    3.1   -2.8    6.0  -39.1    8.5  ESA wrt IGS97
 AREQ    -8.5    1.8    3.6    3.3  -24.4    5.2  ESA wrt IGS97
 GODE     3.2   11.2   -7.6   22.8    5.8   33.2  ESA wrt IGS97
 ALGO     0.1    1.6   -1.5    2.8   10.8    4.8  ESA wrt IGS97
 PIE1     8.7    1.7    2.9    3.8    6.9    6.4  ESA wrt IGS97
 YELL     5.1    2.1    4.6    3.4   -3.8    6.4  ESA wrt IGS97
 GOL2     6.1    1.8   -7.1    3.8    8.0    6.9  ESA wrt IGS97
 DRAO     8.6    1.6    4.6    2.7   -7.3    4.5  ESA wrt IGS97
 FAIR     6.1    4.0   -2.0    6.8    4.1   11.3  ESA wrt IGS97
 KOKB     9.8    3.0    5.5    5.6    8.9   10.3  ESA wrt IGS97
 CHAT    -2.8    2.1    1.3    4.0    5.8    7.0  ESA wrt IGS97
 AUCK    -5.4    1.9   -0.5    3.9    7.8    6.7  ESA wrt IGS97
 MCM4    -0.1    4.0   -0.4    6.0   26.0   20.2  ESA wrt IGS97
 HOB2    -8.8    2.2   -3.2    4.5   37.4    6.7  ESA wrt IGS97
 GUAM    -3.1    1.6    8.2    3.9  -11.1    5.9  ESA wrt IGS97
 TSKB     9.4    2.1    6.2    4.1  -18.6    8.1  ESA wrt IGS97
 SHAO     1.4    2.1    1.3    4.7   -4.2   11.2  ESA wrt IGS97
 YAR1    -5.1    2.4   -6.6    5.7   28.5    9.8  ESA wrt IGS97
 CAS1    -3.6    2.8    1.3    3.8    9.0    7.2  ESA wrt IGS97
 IRKT     2.7    2.1   -3.4    3.8   19.1    6.5  ESA wrt IGS97
 BAHR     4.8    1.6    0.0    2.9   12.2    5.0  ESA wrt IGS97
 MALI    -6.9    2.5    9.5    6.7   33.5   11.1  ESA wrt IGS97
 TROM     5.0    1.7    0.5    2.1  -31.7    5.3  ESA wrt IGS97
 GRAZ     3.5    2.9   -2.7    5.5    0.9    8.8  ESA wrt IGS97
 POTS    -0.9    1.4   -2.6    2.3  -11.9    4.5  ESA wrt IGS97
 WTZR     2.5    1.5   -4.7    2.6   -5.8    4.8  ESA wrt IGS97
 ONSA     0.0    1.6   -3.8    2.5   -5.5    5.3  ESA wrt IGS97
 NYAL     2.2    2.0   -0.1    2.1  -30.3    6.7  ESA wrt IGS97
 Reference sites NOT used 
 
 
 4.0 CENTER FITS TO COMBINED SOLUTION 
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 60.57
 
 Transformation of loose solution COD to COMB
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation   1.2 mm  COD wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -9.0    2.2    -10.0    2.3      9.0    3.4  -2.530  0.110  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1    -0.3    0.7   -1.0    1.0   -3.0    2.8  COD wrt COMB
 KOUR     0.7    0.9    0.8    2.1    5.1    3.7  COD wrt COMB
 OHIG    -1.0    2.0   -0.8    2.3   -1.0    4.9  COD wrt COMB
 BRMU     0.7    0.7    1.5    1.1   -5.0    3.7  COD wrt COMB
 SANT     0.0    1.6   -3.0    1.9   -8.7    3.9  COD wrt COMB
 AREQ     1.0    1.2   -1.0    1.8   -5.0    3.2  COD wrt COMB
 WES2     0.4    0.7    0.8    0.8   -5.3    4.2  COD wrt COMB
 GODE     0.4    0.6    0.7    0.8   -2.4    3.5  COD wrt COMB
 ALGO     0.5    0.7    0.6    0.7   -1.8    2.6  COD wrt COMB
 NLIB     0.8    0.7   -0.3    0.8    7.9    4.3  COD wrt COMB
 MDO1     0.5    0.7   -0.2    0.9    8.9    3.6  COD wrt COMB
 PIE1     0.3    0.7   -0.2    0.8    4.2    3.4  COD wrt COMB
 YELL     0.1    0.8    0.2    0.7    3.6    2.4  COD wrt COMB
 DRAO    -0.1    0.7   -0.8    0.8    5.5    2.5  COD wrt COMB
 FAIR    -0.4    0.9    0.5    0.9    4.4    3.6  COD wrt COMB
 KOKB     0.9    1.0    0.4    1.9   -1.0    3.8  COD wrt COMB
 CHAT    -0.1    1.0    0.8    1.6   -3.3    3.3  COD wrt COMB
 AUCK    -0.3    0.9    0.4    1.5   -5.8    3.8  COD wrt COMB
 MCM4     2.4    1.8    0.5    2.7    1.9    8.5  COD wrt COMB
 MAC1    -1.4    0.9   -0.3    1.0   -2.1    2.8  COD wrt COMB
 TIDB    -1.1    0.7   -1.3    1.0   -5.4    2.7  COD wrt COMB
 HOB2    -1.3    0.8   -0.9    1.0   -3.5    3.2  COD wrt COMB
 GUAM    -1.8    1.1    1.7    2.3    3.9    3.8  COD wrt COMB
 TSKB     0.2    1.1    1.5    1.2    2.1    4.8  COD wrt COMB
 SHAO     0.4    1.0    0.8    1.2    4.0    4.7  COD wrt COMB
 YAR1    -1.0    1.0   -3.0    1.3    8.4    5.8  COD wrt COMB
 CAS1     0.6    1.0   -1.3    1.3    6.8    2.8  COD wrt COMB
 IRKT     1.1    0.9    0.2    1.0   -1.9    3.3  COD wrt COMB
 LHAS     0.1    1.0    1.3    1.5    0.1    3.7  COD wrt COMB
 DAV1     1.1    1.2    0.0    1.2    7.4    2.9  COD wrt COMB
 KERG     1.6    1.1   -0.3    1.9   -0.2    4.2  COD wrt COMB
 BAHR    -0.6    0.8   -2.3    1.4  -10.1    3.0  COD wrt COMB
 MALI    -2.0    1.2    6.8    3.4   -2.2    5.0  COD wrt COMB
 MATE    -0.5    0.7   -0.8    0.8   -1.2    2.8  COD wrt COMB
 GRAZ    -0.3    0.7   -0.5    0.8   -0.7    2.9  COD wrt COMB
 POTS    -0.2    0.7   -0.6    0.7   -0.2    2.3  COD wrt COMB
 WTZR    -0.3    0.6   -0.4    0.7   -1.5    2.3  COD wrt COMB
 ONSA    -0.5    0.7   -0.5    0.7    1.8    2.6  COD wrt COMB
 WSRT    -0.3    0.7   -0.6    0.7   -0.8    2.2  COD wrt COMB
 Reference sites NOT used 
 MADR     0.5    0.7    0.0    0.9   -7.5    3.3  COD wrt COMB
 
 CENTER EMR
 -------------------
 VARIANCE RESCALING FACTOR FOR EMR 5.95
 
 Transformation of loose solution EMR to COMB
 -----------------------------------------------
 For   26 Sites, RMS after 7 parameter transformation   2.6 mm  EMR wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
  -24.0   11.0     19.4   11.5     14.8   27.6  -2.266  0.305  EMR  CoM
 
 Adjustments to core site positions for EMR
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1    -3.9    2.2   -0.9    3.1    3.2    6.2  EMR wrt COMB
 FORT     1.6    4.1   -1.1    9.5    8.1   15.9  EMR wrt COMB
 OHIG     1.7    4.2   -1.9    4.2    0.9   10.2  EMR wrt COMB
 BRMU    -5.7    2.1    4.5    3.3    5.5    6.4  EMR wrt COMB
 AREQ    -3.1    4.0   -1.3    6.8   10.5   11.8  EMR wrt COMB
 ALGO    -0.1    1.9    0.4    2.7   -3.1    5.4  EMR wrt COMB
 PIE1     0.9    2.1   -1.2    3.6  -13.7    6.7  EMR wrt COMB
 YELL     1.1    2.3   -3.0    3.3   -3.7    6.6  EMR wrt COMB
 DRAO     0.7    1.9    0.1    2.7   -4.1    5.6  EMR wrt COMB
 FAIR    -0.1    3.4   -9.5    5.2   -8.6   10.2  EMR wrt COMB
 KOKB    -0.2    3.4   -1.1    5.9   -7.4   10.9  EMR wrt COMB
 CHAT    -0.7    3.5    3.1    5.4    3.7    9.7  EMR wrt COMB
 AUCK     1.3    3.7   -2.8    6.2    1.5   11.4  EMR wrt COMB
 MCM4     0.3    5.8    2.3    6.9   -0.4   17.5  EMR wrt COMB
 MAC1     4.5    2.7    1.3    3.8   -3.8    7.7  EMR wrt COMB
 TIDB     0.1    3.2   -0.3    4.9    4.4   10.3  EMR wrt COMB
 GUAM     4.1    3.0    2.4    4.7  -15.8    9.2  EMR wrt COMB
 TSKB    -1.8    2.9    3.6    3.9    4.4    8.5  EMR wrt COMB
 YAR1    -2.8    3.3    4.5    5.5  -19.2   11.0  EMR wrt COMB
 IRKT     0.0    2.7    2.6    3.5    6.3    6.5  EMR wrt COMB
 DAV1     3.9    3.4    2.0    4.0   -6.4    9.1  EMR wrt COMB
 KERG     2.5    3.4  -10.1    4.6    9.8    8.5  EMR wrt COMB
 BAHR     1.6    4.1   -0.2    7.4   14.9   15.2  EMR wrt COMB
 MATE    -0.1    2.4    3.1    3.2    7.0    6.6  EMR wrt COMB
 ONSA     1.0    2.2   -3.0    2.6    4.4    5.7  EMR wrt COMB
 NYAL    -1.1    2.7    0.1    2.8    6.6    8.6  EMR wrt COMB
 Reference sites NOT used 
 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 16.48
 
 Transformation of loose solution JPL to COMB
 -----------------------------------------------
 For   26 Sites, RMS after 7 parameter transformation   2.4 mm  JPL wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -7.3    8.4      1.3    8.9     17.7    8.9  -2.251  0.287  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1    -0.7    1.7   -1.3    2.0    0.9    6.6  JPL wrt COMB
 FORT     0.8    3.3   -2.1    4.8   -2.7   16.2  JPL wrt COMB
 OHIG     6.6    3.2   -0.6    2.8    3.4    9.8  JPL wrt COMB
 BRMU    -3.9    4.4    2.4    4.2  -17.1   18.5  JPL wrt COMB
 SANT     2.3    3.1    4.3    2.6   23.2   10.3  JPL wrt COMB
 AREQ     1.0    2.3    1.1    2.1   19.7    8.0  JPL wrt COMB
 ALGO    -2.0    2.0    0.7    1.5   -9.3    6.1  JPL wrt COMB
 YELL     0.2    2.3   -0.9    1.8   -6.3    7.7  JPL wrt COMB
 DRAO    -0.4    4.8    0.0    3.9  -11.7   14.7  JPL wrt COMB
 FAIR    -2.3    3.4   -1.4    2.6  -14.9   13.2  JPL wrt COMB
 KOKB    -4.6    2.7   -2.3    2.9   -6.3   10.4  JPL wrt COMB
 AUCK     1.8    2.0   -0.7    2.0    1.2    7.0  JPL wrt COMB
 MCM4     1.6    5.7    5.2    5.3    1.3   20.1  JPL wrt COMB
 MAC1     5.2    2.3   -0.8    1.7  -10.6    6.7  JPL wrt COMB
 TIDB     3.7    1.7   -1.1    1.5    8.4    6.1  JPL wrt COMB
 GUAM     0.8    1.8   -1.9    1.8    4.6    7.0  JPL wrt COMB
 TSKB    -2.9    2.1    1.3    2.1   10.9    7.9  JPL wrt COMB
 YAR1     2.3    2.5    2.4    3.2  -13.6   11.0  JPL wrt COMB
 IRKT    -0.3    2.1   -0.3    1.6    4.1    6.5  JPL wrt COMB
 DAV1     0.2    2.6   -0.9    2.4   -1.0    8.8  JPL wrt COMB
 KERG     0.8    2.3   -3.3    2.1    1.2    7.2  JPL wrt COMB
 BAHR    -0.4    1.8   -0.2    1.9   11.1    6.9  JPL wrt COMB
 MALI     1.1    2.8    3.7    3.7   -8.7   13.2  JPL wrt COMB
 WTZR    -2.3    1.8   -0.2    1.5   -2.8    5.7  JPL wrt COMB
 ONSA     0.5    1.9    0.7    1.5   -4.8    6.0  JPL wrt COMB
 NYAL    -1.1    2.4    0.0    2.0    5.7   12.8  JPL wrt COMB
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 144.45
 
 Transformation of loose solution GFZ to COMB
 -----------------------------------------------
 For   30 Sites, RMS after 7 parameter transformation   1.5 mm  GFZ wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    1.1 3552.7     -3.8 3552.7      3.7 3552.7  -2.905  0.122  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     0.3    0.9    1.9    1.0    3.1    3.5  GFZ wrt COMB
 KOUR    -4.0    1.4   -0.5    1.9   -6.6    6.6  GFZ wrt COMB
 OHIG     4.7    1.5   -0.6    1.2    2.1    4.8  GFZ wrt COMB
 BRMU    -0.9    0.9   -2.3    0.9    2.4    3.9  GFZ wrt COMB
 SANT     2.0    1.5    3.0    1.2   17.4    4.9  GFZ wrt COMB
 AREQ     1.1    1.1   -0.9    1.0    6.2    3.6  GFZ wrt COMB
 WES2     0.0    1.2   -1.0    1.0   -2.3    5.0  GFZ wrt COMB
 ALGO    -1.8    0.9   -0.1    0.8   -3.5    3.2  GFZ wrt COMB
 NLIB    -1.2    1.1    1.5    1.1  -13.6    4.7  GFZ wrt COMB
 MDO1    -0.6    0.9   -0.5    1.0  -10.7    3.9  GFZ wrt COMB
 YELL    -2.6    1.0   -2.0    0.8   -5.8    3.2  GFZ wrt COMB
 DRAO    -0.7    1.0    0.7    0.9   -7.1    3.1  GFZ wrt COMB
 CHAT     0.5    1.1    0.0    1.0   -1.1    3.7  GFZ wrt COMB
 MCM4    -2.6    1.5    0.5    1.2   -0.4    7.0  GFZ wrt COMB
 MAC1     2.7    1.0   -0.2    0.8    2.3    3.3  GFZ wrt COMB
 TIDB     1.9    0.9   -0.4    0.8    4.3    3.3  GFZ wrt COMB
 HOB2     2.3    1.2   -0.9    0.9   -4.4    4.2  GFZ wrt COMB
 GUAM     2.4    1.0   -0.5    1.0   -2.4    3.7  GFZ wrt COMB
 YAR1     1.8    1.5    1.2    1.6   -6.8    6.6  GFZ wrt COMB
 CAS1    -0.3    1.0   -0.1    0.8   -3.8    3.5  GFZ wrt COMB
 IRKT    -1.8    1.1    0.7    0.9    3.8    3.6  GFZ wrt COMB
 LHAS    -0.8    1.1   -0.1    1.1    2.9    4.5  GFZ wrt COMB
 DAV1     0.2    1.0   -1.2    0.9   -8.1    3.7  GFZ wrt COMB
 KERG    -1.3    1.1    0.5    1.0   -0.1    3.6  GFZ wrt COMB
 BAHR    -2.2    0.9    1.3    1.0    6.8    3.6  GFZ wrt COMB
 MALI    -0.9    1.2   -2.9    1.5    4.4    5.0  GFZ wrt COMB
 POTS     1.0    0.9    0.7    0.7    5.9    3.1  GFZ wrt COMB
 WTZR    -1.2    0.9    0.6    0.8    4.9    3.1  GFZ wrt COMB
 ONSA     1.9    1.0    1.1    0.8    2.2    3.3  GFZ wrt COMB
 WSRT     0.0    0.9    0.9    0.8    4.4    3.0  GFZ wrt COMB
 Reference sites NOT used 
 MADR    -3.6    1.1   -1.3    1.0   12.2    4.3  GFZ wrt COMB
 
 CENTER NGS
 -------------------
 VARIANCE RESCALING FACTOR FOR NGS 250.6
 
 Transformation of loose solution NGS to COMB
 -----------------------------------------------
 For   41 Sites, RMS after 7 parameter transformation   7.2 mm  NGS wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   19.2   11.8     15.4   12.7    -68.1   42.6  -2.251  0.448  NGS  CoM
 
 Adjustments to core site positions for NGS
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1    -6.9    4.4  -11.3    6.8    3.7   11.9  NGS wrt COMB
 FORT    -2.1    5.8   17.8   14.1  -34.6   18.7  NGS wrt COMB
 KOUR     4.0    4.1   -1.9    6.1  -32.7    9.8  NGS wrt COMB
 OHIG   -17.4    8.6   12.3   10.3    5.4   14.3  NGS wrt COMB
 BRMU    12.7    2.7    3.3    4.3   18.3    7.8  NGS wrt COMB
 SANT    -8.0    6.9   -1.8    9.0  -17.9   11.8  NGS wrt COMB
 AREQ    -2.6    5.4  -11.4    7.5  -27.0    9.4  NGS wrt COMB
 WES2    10.4    2.5    4.8    4.1   33.8    8.0  NGS wrt COMB
 GODE    13.0    2.4    1.6    3.8   17.4    7.4  NGS wrt COMB
 ALGO    10.4    2.4    0.7    3.5   22.4    6.2  NGS wrt COMB
 NLIB    11.6    2.5    0.7    4.2   20.3    8.0  NGS wrt COMB
 MDO1    14.4    3.1   -4.7    5.0   20.8    9.3  NGS wrt COMB
 PIE1    12.3    2.9   -3.1    4.7   15.5    8.4  NGS wrt COMB
 YELL     2.9    2.9    3.0    4.1   10.5    7.0  NGS wrt COMB
 GOL2    11.2    3.1    0.1    4.8   16.8    8.6  NGS wrt COMB
 DRAO     6.4    2.8    3.9    4.3   15.6    7.3  NGS wrt COMB
 FAIR     4.9    6.2    6.4    9.2   -9.9   16.7  NGS wrt COMB
 KOKB     2.3    6.6    1.0   10.9   -1.5   16.4  NGS wrt COMB
 CHAT    -9.4    5.1    0.1    6.7    1.1   10.7  NGS wrt COMB
 AUCK    -9.5    5.2   -6.8    6.6   -0.3   11.4  NGS wrt COMB
 MCM4    -1.2    5.5   -8.3    6.8   16.7   15.2  NGS wrt COMB
 MAC1    -7.8    3.4  -11.0    4.9   23.8    9.6  NGS wrt COMB
 HOB2    -6.5    3.9  -13.6    6.5   31.7   12.3  NGS wrt COMB
 GUAM   -11.8    5.9   21.2    9.0  -52.2   14.1  NGS wrt COMB
 TSKB     2.0    4.4   11.6    6.6  -40.8   10.1  NGS wrt COMB
 SHAO    -2.4    4.1   11.7    5.7  -42.5   10.6  NGS wrt COMB
 YAR1    -9.0    4.3    9.9    7.1   22.0   13.2  NGS wrt COMB
 CAS1     6.3    3.5   -2.6    4.9   27.5    9.0  NGS wrt COMB
 IRKT     5.1    3.4    0.3    4.3  -35.6    7.8  NGS wrt COMB
 LHAS    -6.1    3.8   -1.1    5.9  -40.9   11.6  NGS wrt COMB
 DAV1     6.0    4.3    5.0    5.1   29.0    9.3  NGS wrt COMB
 KERG    -4.1    4.0    4.7    5.2   29.3    8.9  NGS wrt COMB
 BAHR    -6.8    4.2   -0.3    6.2  -31.1    9.5  NGS wrt COMB
 MALI   -10.6    5.5   23.6   11.0    3.0   13.2  NGS wrt COMB
 TROM     1.0    2.7   -7.8    3.0    3.3    6.9  NGS wrt COMB
 MATE    -0.4    3.2   -9.3    4.1  -12.5    8.6  NGS wrt COMB
 GRAZ     0.4    2.9  -13.7    3.7  -11.9    8.1  NGS wrt COMB
 POTS     1.0    2.7  -11.7    3.3   -8.7    7.0  NGS wrt COMB
 WTZR     1.5    2.7  -12.4    3.4  -13.0    7.2  NGS wrt COMB
 ONSA     1.1    2.6  -12.5    3.2   -7.9    7.0  NGS wrt COMB
 NYAL     1.3    3.0   -6.0    3.1    2.7    9.2  NGS wrt COMB
 Reference sites NOT used 
 MADR    -2.9    3.5  -11.2    5.6   10.6    9.4  NGS wrt COMB
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 26.992
 
 Transformation of loose solution ESA to COMB
 -----------------------------------------------
 For   32 Sites, RMS after 7 parameter transformation   3.3 mm  ESA wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   17.1    4.9    -17.1    5.2    -12.2   13.5  -2.047  0.251  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 MAS1     2.1    1.5    0.7    3.4    6.8    5.5  ESA wrt COMB
 FORT    -5.8    3.3   -0.2   13.3    5.3   20.6  ESA wrt COMB
 KOUR     5.8    2.8    1.4    6.6   -1.5    9.3  ESA wrt COMB
 BRMU     5.7    3.5   -9.0    9.2   10.0   17.6  ESA wrt COMB
 SANT    -6.5    3.1   -5.6    6.0  -25.0    8.5  ESA wrt COMB
 AREQ    -4.3    1.8   -3.1    3.3  -10.9    5.2  ESA wrt COMB
 GODE     4.5   11.2   -3.6   22.8    1.2   33.2  ESA wrt COMB
 ALGO     2.9    1.6   -1.5    2.8   12.7    4.8  ESA wrt COMB
 PIE1     4.4    1.7    2.0    3.8   -2.2    6.4  ESA wrt COMB
 YELL     5.1    2.1    2.3    3.4    0.2    6.4  ESA wrt COMB
 GOL2     3.5    1.8    4.8    3.8   -3.7    6.9  ESA wrt COMB
 DRAO     4.3    1.6    5.7    2.7   -4.5    4.5  ESA wrt COMB
 FAIR     4.0    4.0   -2.3    6.8  -10.5   11.3  ESA wrt COMB
 KOKB     3.7    3.0    9.5    5.6    1.5   10.3  ESA wrt COMB
 CHAT    -1.1    2.1   -1.0    4.0   16.5    7.0  ESA wrt COMB
 AUCK    -3.7    1.9   -2.9    3.9   18.3    6.7  ESA wrt COMB
 MCM4     3.0    4.0   -0.1    6.0    7.2   20.1  ESA wrt COMB
 HOB2    -4.6    2.2   -4.9    4.5   25.6    6.7  ESA wrt COMB
 GUAM    -3.9    1.6    9.1    3.9   -3.8    5.9  ESA wrt COMB
 TSKB     0.2    2.1   -2.3    4.1   -8.3    8.1  ESA wrt COMB
 SHAO    -1.2    2.1    1.0    4.7  -16.7   11.2  ESA wrt COMB
 YAR1    -3.8    2.4   -1.8    5.7   17.9    9.8  ESA wrt COMB
 CAS1     1.6    2.8    1.1    3.8   -6.5    7.2  ESA wrt COMB
 IRKT     1.8    2.1   -2.0    3.8   -4.2    6.5  ESA wrt COMB
 BAHR     2.6    1.6   -1.4    2.9   10.3    5.0  ESA wrt COMB
 MALI     0.6    2.5    2.7    6.7   14.0   11.1  ESA wrt COMB
 TROM     3.6    1.7   -0.8    2.1  -10.6    5.3  ESA wrt COMB
 GRAZ     0.1    2.9   -4.1    5.5    1.8    8.8  ESA wrt COMB
 POTS     0.7    1.4   -0.1    2.3   -8.7    4.5  ESA wrt COMB
 WTZR     2.4    1.5   -1.4    2.6   -1.9    4.8  ESA wrt COMB
 ONSA     0.0    1.6   -2.5    2.5   -8.9    5.3  ESA wrt COMB
 NYAL     1.3    2.0   -0.5    2.1  -11.4    6.7  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)
52035.50  174783  455646   -70989  13683    36    38   94331      60 126  0  0   2105  -2061     67     67     .023   .000   .000
52036.50  177189  453467   -83731  11731    32    34   94335      53 126  0  0   2707  -2300     51     52    -.006   .000   .000
52037.50  179990  451240   -94490   9797    32    34   94340      52 126  0  0   2893  -2148     49     51    -.007   .000   .000
52038.50  182754  449076  -103303   7896    33    35   94345      54 126  0  0   2639  -2183     51     52    -.005   .000   .000
52039.50  185404  446878  -110394   6389    33    35   94349      55 126  0  0   2662  -2212     52     53    -.002   .000   .000
52040.50  188064  444942  -116489   5916    33    35   94354      54 126  0  0   2657  -1656     55     56    -.004   .000   .000
52041.50  190513  443424  -122388   5982    35    38   94359      61 126  0  0   2241  -1384     67     70    -.030   .000   .000



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