[IGSREPORT-9458] Wk 1174 MIT T2 Analysis Report

Tom Herring tah at chandler.mit.edu
Thu Jul 25 00:15:45 PDT 2002


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IGS Electronic Report   25 Jul 00:16:16 PDT 2002      Message Number 9458
******************************************************************************

Author: Thomas Herring

********************************************************************************
MIT ANALYSIS REPORT GPS-WEEK 1174    Dates: 02jul07  to  02jul13 
********************************************************************************

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
   MIT1174g.SNX   Combined sinex file from all available analysis centers
   MIT1174g.SUM   Name of this summary file
   MIT1174g.RES   File of the individual AC position estimates residuals 
                  to the combined solution for the week. 

0.0 Starting Week 1125, we removed AREQ from the sites used in determining
    the variance re-scaling of the center SINEX files.  This site
    appears to have moved by 0.5 meters at around week 1120.
0.1 Starting Week 1110, we stopped applied a pole-tide correction to
    SIO sinex files because this correction is already made in their
    analysis.
0.2 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.
0.3 Starting Week 1020, we adopted the ITRF97 reference frame
0.4 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    144    1.1     .9      .7     .7     5.5    1.4  
 JPL     87    1.8    1.0     1.6    1.0    14.5    2.2  
 SIO    139    2.3    1.0     3.5    1.1     9.8    1.5  
 EMR     43    2.1     .5     1.6     .4     6.8     .4  
 ESA     61    6.4    3.0     4.3    1.0    16.8    2.2  
 GFZ     90    1.1     .4     1.6     .6     6.0     .5  
 NGS      0     .0     .0      .0     .0      .0     .0  
 
CENTER SINEX ERRORS: (corrected during processing).
 CNT  Site Type of Error           Used values                       IGS.SNX values
 NRC  NYAL Eccentricity: Used          .0040  -.0010  5.2160 Real   .0000   .0000  5.2160  m
 COD  PDEL Used LEIAT504         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 COD  PDEL Real LEIAT504         dL1   .0003  -.0003   .1093  dL2   .0011   .0011   .1282  m
 COD  QAQ1 Used ASH701941.B      dL1   .0000   .0000   .1100  dL2  -.0003   .0002   .1267  m
 COD  QAQ1 Real ASH701941.B      dL1  -.0002   .0001   .1080  dL2  -.0003   .0002   .1267  m
 JPL  ALGO Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  ALGO Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  AOML Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  AOML Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  ASC1 Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  ASC1 Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  BRMU Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  BRMU Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  CIC1 Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  CIC1 Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  CRO1 Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  CRO1 Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  DGAR Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  DGAR Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  EISL Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  EISL Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  GALA Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  GALA Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  HRAO Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  HRAO Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  IISC Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  IISC Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  IRKT Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  IRKT Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  KERG Used TRM29659.00      dL1   .0003  -.0003   .1093  dL2   .0011   .0011   .1282  m
 JPL  KERG Real TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  KUNM Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  KUNM Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  KWJ1 Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  KWJ1 Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  MAD2 Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  MAD2 Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  MALI Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  MALI Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  MCM4 Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  MCM4 Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  NOT1 Used TRM29659.00      dL1   .0003  -.0003   .1093  dL2   .0011   .0011   .1282  m
 JPL  NOT1 Real TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  NRC1 Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  NRC1 Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  PERT Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  PERT Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  PIE1 Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  PIE1 Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  STJO Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  STJO Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  THTI Used TRM29659.00      dL1   .0003  -.0003   .1093  dL2   .0011   .0011   .1282  m
 JPL  THTI Real TRM29659.00      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  TSKB Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  TSKB Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  WHIT Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  WHIT Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 JPL  YELL Used AOAD/M_T         dL1   .0000   .0000   .0780  dL2   .0000   .0000   .0960  m
 JPL  YELL Real AOAD/M_T         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  PDEL Used LEIAT504         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  PDEL Real LEIAT504         dL1   .0003  -.0003   .1093  dL2   .0011   .0011   .1282  m
 SIO  KELY Used ASH701945C_M     dL1   .0005   .0003   .1090  dL2   .0003   .0012   .1279  m
 SIO  KELY Real ASH701945C_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  CHAT Eccentricity: Used          .0000   .0000   .0031 Real   .0000   .0000   .0062  m
 SIO  PIMO Used ASH701945C_M     dL1   .0005   .0003   .1090  dL2   .0003   .0012   .1279  m
 SIO  PIMO Real ASH701945C_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  TCMS Used LEIAT504         dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  TCMS Real LEIAT504         dL1   .0003  -.0003   .1093  dL2   .0011   .0011   .1282  m
 SIO  NRIL Used ASH701945.02B    dL1   .0005   .0003   .1090  dL2   .0003   .0012   .1279  m
 SIO  NRIL Real ASH701945B_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  KIRU Used ASH701945C_M     dL1   .0005   .0003   .1090  dL2   .0003   .0012   .1279  m
 SIO  KIRU Real ASH701945C_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  TRO1 Used ASH701073.1      dL1   .0014  -.0010   .1089  dL2   .0010   .0005   .1274  m
 SIO  TRO1 Real ASH701073.1      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  GRAZ Used ASH701945C_M     dL1   .0005   .0003   .1090  dL2   .0003   .0012   .1279  m
 SIO  GRAZ Real ASH701945C_M     dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 SIO  NYA1 Used ASH701073.1      dL1   .0014  -.0010   .1089  dL2   .0010   .0005   .1274  m
 SIO  NYA1 Real ASH701073.1      dL1   .0000   .0000   .1100  dL2   .0000   .0000   .1280  m
 ESA  AUCK Eccentricity: Used          .0000   .0000   .0018 Real   .0000   .0000   .0016  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   3.2 mm  COMBINED wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -2.0    2.0     -3.9    2.0    -16.7    2.7  -1.577  0.093  COMBINED  CoM
 
 Adjustments to core site positions for COMBINED
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     0.9    0.6    0.4    0.7    0.5    2.3  COMBINED wrt IGS97
 MAS1     2.0    0.7   -0.7    0.9   -5.3    2.7  COMBINED wrt IGS97
 BRAZ    -6.1    1.0    1.4    1.0    1.5    3.9  COMBINED wrt IGS97
 KOUR    -5.7    0.6    0.0    0.7   -2.2    2.2  COMBINED wrt IGS97
 BRMU     2.0    0.9   -1.5    0.9  -19.8    3.7  COMBINED wrt IGS97
 THU1     1.1    9.2   -8.2   10.6  -24.7   54.3  COMBINED wrt IGS97
 SANT    -4.7    0.9    4.5    0.8   -3.4    2.4  COMBINED wrt IGS97
 WES2    -1.8    0.8   -8.3    0.8    6.2    2.9  COMBINED wrt IGS97
 GODE     2.3    0.7   -1.5    0.8    0.5    2.8  COMBINED wrt IGS97
 ALGO     1.2    0.6    0.4    0.6    1.9    2.1  COMBINED wrt IGS97
 NLIB    -3.9    1.0    1.3    1.3   -4.1    5.3  COMBINED wrt IGS97
 MDO1    -1.4    0.8    0.1    1.0    7.4    3.4  COMBINED wrt IGS97
 PIE1     3.0    0.8    5.9    0.9   11.0    3.2  COMBINED wrt IGS97
 YELL    -1.4    0.8    1.1    0.6   -6.9    2.5  COMBINED wrt IGS97
 DRAO     2.6    0.7    2.8    0.7   -3.0    2.3  COMBINED wrt IGS97
 FAIR     3.7    0.8    2.4    0.7  -13.6    2.7  COMBINED wrt IGS97
 KOKB    -1.1    0.8   -5.3    1.1   25.4    3.1  COMBINED wrt IGS97
 CHAT     1.3    0.7    0.8    0.7    5.2    2.2  COMBINED wrt IGS97
 AUCK    -1.2    4.0   -2.3    3.8  -11.7   14.5  COMBINED wrt IGS97
 KWJ1     0.4    1.1   -1.7    1.4   -8.6    5.2  COMBINED wrt IGS97
 MCM4     1.3    0.9   -4.6    0.8   -8.7    4.1  COMBINED wrt IGS97
 MAC1     2.4    0.7   -1.8    0.6    0.8    2.2  COMBINED wrt IGS97
 TIDB    -3.8    0.7    0.4    0.7   -0.3    2.6  COMBINED wrt IGS97
 HOB2    -3.0    0.7    0.2    0.6    9.0    2.2  COMBINED wrt IGS97
 TSKB     9.5    0.8    3.9    0.8    1.0    2.8  COMBINED wrt IGS97
 PERT    -1.5    0.7   -0.1    0.7  -29.5    3.0  COMBINED wrt IGS97
 YAR1    -0.2    0.9   -1.8    0.8    4.2    3.3  COMBINED wrt IGS97
 CAS1    -6.2    0.7    1.7    0.6    0.1    2.3  COMBINED wrt IGS97
 IRKT     0.7    0.8   -3.4    0.7   16.1    2.6  COMBINED wrt IGS97
 LHAS    -0.8    0.9   -9.3    1.1    2.1    3.9  COMBINED wrt IGS97
 DAV1    -7.8    0.7    1.5    0.7   -5.7    2.3  COMBINED wrt IGS97
 KERG    -3.6    0.9   -0.8    0.8   -6.2    2.9  COMBINED wrt IGS97
 BAHR     2.5    0.6    9.6    0.7    5.4    2.3  COMBINED wrt IGS97
 ZWEN     0.0    0.8    2.7    0.7    7.3    2.6  COMBINED wrt IGS97
 TROM     2.0    1.5    8.4    2.1   -5.4    5.9  COMBINED wrt IGS97
 MATE     0.1    0.9    1.8    0.9   11.1    3.3  COMBINED wrt IGS97
 GRAZ     0.3    0.7   -5.1    0.7   12.1    2.5  COMBINED wrt IGS97
 POTS     0.7    0.7   -1.3    0.6    3.6    2.2  COMBINED wrt IGS97
 WTZR     2.0    0.6   -0.1    0.6    6.3    2.0  COMBINED wrt IGS97
 ONSA     2.8    0.6   -0.2    0.5   -9.9    2.0  COMBINED wrt IGS97
 NYAL    -0.2    1.1    3.6    1.1    0.3    5.4  COMBINED wrt IGS97
 WSRT     1.9    0.6    0.0    0.6    0.6    1.8  COMBINED wrt IGS97
 Reference sites NOT used 
 MADR    17.1    1.1  -43.4    0.9  -13.6    4.0  COMBINED wrt IGS97
 
 
 3.0 CENTER FITS TO IGS1997
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 107.1
 
 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)
   -4.2    2.7     -9.0    2.7    -27.5    3.6  -2.111  0.125  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.0    1.0    1.6    0.9   -8.5    3.7  COD wrt IGS97
 MAS1     3.3    1.1    0.2    1.1  -15.2    4.4  COD wrt IGS97
 BRAZ    -5.5    1.2    1.6    1.2    3.1    4.6  COD wrt IGS97
 KOUR    -5.3    0.9    0.2    0.9   -2.3    3.0  COD wrt IGS97
 BRMU     3.2    1.3   -1.8    1.3  -21.8    5.9  COD wrt IGS97
 SANT    -5.2    1.3    3.6    1.0    4.4    3.3  COD wrt IGS97
 WES2    -0.4    1.2   -9.0    1.0   -2.7    4.4  COD wrt IGS97
 GODE     2.6    1.1   -2.8    1.0   -3.2    3.9  COD wrt IGS97
 ALGO     1.1    1.1   -0.3    0.9    2.3    3.5  COD wrt IGS97
 NLIB    -2.4    1.5    2.0    1.5  -17.5    7.3  COD wrt IGS97
 MDO1    -2.3    1.2    0.6    1.2   11.3    5.3  COD wrt IGS97
 PIE1     2.5    1.2    5.7    1.2   17.2    5.0  COD wrt IGS97
 YELL    -2.7    1.2    0.4    0.8   -2.4    3.4  COD wrt IGS97
 DRAO     2.3    1.1    2.2    0.9   -3.4    3.2  COD wrt IGS97
 FAIR     1.9    1.5    1.2    1.0   -6.6    4.4  COD wrt IGS97
 CHAT     1.6    1.0    0.4    0.9   -9.0    3.1  COD wrt IGS97
 AUCK    -1.3    4.2   -2.5    3.9  -12.5   15.2  COD wrt IGS97
 KWJ1     1.3    1.5   -1.2    1.6    5.1    6.7  COD wrt IGS97
 MCM4     1.2    1.3   -6.9    1.0   -4.5    6.6  COD wrt IGS97
 MAC1     1.7    1.0   -2.4    0.8   -4.8    3.0  COD wrt IGS97
 TIDB    -3.2    1.0    0.1    0.8   -7.2    3.8  COD wrt IGS97
 HOB2    -3.0    0.9   -0.2    0.7    5.3    3.0  COD wrt IGS97
 TSKB     9.7    1.7    4.4    1.4   18.0    6.2  COD wrt IGS97
 PERT    -0.8    1.0   -0.4    1.0  -25.6    4.3  COD wrt IGS97
 YAR1     0.7    0.9   -1.9    0.9    6.2    3.4  COD wrt IGS97
 CAS1    -7.5    1.0    1.5    0.8    4.9    3.4  COD wrt IGS97
 IRKT    -1.8    1.4   -2.4    1.1   31.8    4.4  COD wrt IGS97
 LHAS     1.2    1.5   -8.2    1.4   10.2    5.8  COD wrt IGS97
 DAV1    -8.6    0.9    1.7    0.9   -0.4    3.0  COD wrt IGS97
 KERG    -3.7    1.4    0.7    1.1   -4.8    4.8  COD wrt IGS97
 ZWEN    -2.6    1.1    4.5    0.8    8.2    3.3  COD wrt IGS97
 MATE     1.3    1.3    3.0    1.1   11.5    4.9  COD wrt IGS97
 GRAZ     0.9    1.0   -3.2    0.8   11.2    3.4  COD wrt IGS97
 POTS     0.9    1.0    0.0    0.8    3.8    3.1  COD wrt IGS97
 WTZR     2.2    1.0    1.1    0.8    2.2    3.4  COD wrt IGS97
 ONSA     2.8    1.0    0.5    0.8  -12.1    3.4  COD wrt IGS97
 WSRT     1.5    0.9    1.4    0.7   -1.1    2.8  COD wrt IGS97
 Reference sites NOT used 
 MADR    16.9    1.2  -42.3    1.0  -16.1    4.5  COD wrt IGS97
 
 CENTER EMR
 -------------------
 VARIANCE RESCALING FACTOR FOR EMR 68.425
 
 Transformation of loose solution EMR to IGS97
 -----------------------------------------------
 For   19 Sites, RMS after 7 parameter transformation   3.2 mm  EMR wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -9.7   16.7     -3.6   18.6     -0.2   19.6  -0.743  0.598  EMR  CoM
 
 Adjustments to core site positions for EMR
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -3.9    3.2   -0.4    2.9    3.2   11.7  EMR wrt IGS97
 ALGO    -0.8    3.4    0.3    3.0    3.6   11.7  EMR wrt IGS97
 MDO1    -3.2    3.5   -2.9    3.6   -0.9   13.9  EMR wrt IGS97
 YELL    -2.7    3.6   -0.6    2.5   -6.7   12.1  EMR wrt IGS97
 DRAO     0.3    3.3    0.4    2.7   -5.2   11.3  EMR wrt IGS97
 FAIR     2.9    3.8    1.4    2.9  -20.2   13.2  EMR wrt IGS97
 KOKB    -6.5    3.8   -5.3    4.8   18.9   14.9  EMR wrt IGS97
 CHAT     1.2    7.4    5.1   11.4   -5.2   25.3  EMR wrt IGS97
 KWJ1    -3.6    8.1   -9.8   12.2  -13.8   34.9  EMR wrt IGS97
 MAC1     3.0    4.5   -0.2    4.4   -4.6   15.6  EMR wrt IGS97
 TSKB     9.9    4.2    4.0    3.9    6.8   14.3  EMR wrt IGS97
 PERT     0.0    4.4    1.2    5.1  -20.0   17.6  EMR wrt IGS97
 CAS1    -5.4    4.3    0.3    3.7   -5.9   16.1  EMR wrt IGS97
 IRKT     1.1    4.2   -3.6    3.4   18.9   13.0  EMR wrt IGS97
 KERG    -2.0    4.5   -3.7    4.5    4.9   15.3  EMR wrt IGS97
 BAHR     3.6    3.4    7.3    3.4   13.1   13.0  EMR wrt IGS97
 MATE    -0.6    4.3    2.7    3.7   10.7   16.0  EMR wrt IGS97
 NYAL     0.1    3.1    4.0    2.6    2.7   16.5  EMR wrt IGS97
 WSRT    -0.2    3.4    0.2    2.6   -9.3   11.1  EMR wrt IGS97
 Reference sites NOT used 
 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 12.35
 
 Transformation of loose solution JPL to IGS97
 -----------------------------------------------
 For   25 Sites, RMS after 7 parameter transformation   4.0 mm  JPL wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    3.4    5.5      0.0    5.8     15.2    6.0  -2.635  0.199  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 KOUR    -5.5    1.3   -1.0    1.3    8.8    5.1  JPL wrt IGS97
 BRMU     0.9    1.7   -2.6    1.5  -28.8    7.1  JPL wrt IGS97
 SANT    -1.7    1.7    7.1    1.3   11.4    5.3  JPL wrt IGS97
 ALGO     1.1    1.4   -1.6    1.1  -16.2    4.7  JPL wrt IGS97
 PIE1     2.6    2.4    3.2    2.3   -9.3   10.1  JPL wrt IGS97
 YELL    -1.6    1.5   -1.3    1.1  -26.8    5.1  JPL wrt IGS97
 DRAO     2.0    3.6    1.4    2.7    3.3   12.1  JPL wrt IGS97
 FAIR     4.0    1.6    1.1    1.2   -5.1    5.6  JPL wrt IGS97
 KOKB    -3.0    1.3   -8.1    1.4   31.0    5.5  JPL wrt IGS97
 CHAT     2.1    1.4    2.2    1.2   14.7    4.9  JPL wrt IGS97
 KWJ1     0.9    2.4   -1.6    3.0  -32.5   11.2  JPL wrt IGS97
 MCM4    -0.6    2.1   -2.5    1.7  -11.6    9.6  JPL wrt IGS97
 MAC1     4.6    1.4   -1.1    1.0   16.3    4.7  JPL wrt IGS97
 TIDB    -0.3    1.3    1.4    1.1   23.1    4.7  JPL wrt IGS97
 HOB2     0.9    1.7    2.0    1.3   14.6    5.8  JPL wrt IGS97
 TSKB     9.6    1.5    4.1    1.2  -14.9    5.4  JPL wrt IGS97
 PERT     0.1    1.3   -0.3    1.2  -33.8    5.5  JPL wrt IGS97
 CAS1    -4.0    1.6   -0.1    1.2   -2.4    6.3  JPL wrt IGS97
 IRKT    -0.4    1.6   -4.5    1.1    0.1    4.8  JPL wrt IGS97
 DAV1    -4.3    1.5   -1.4    1.3   -2.6    5.9  JPL wrt IGS97
 KERG    -1.3    1.5   -5.9    1.3    5.1    5.3  JPL wrt IGS97
 BAHR     1.8    1.3    6.7    1.2   17.1    5.1  JPL wrt IGS97
 WTZR     2.1    1.4   -1.1    1.1   10.8    4.6  JPL wrt IGS97
 ONSA     3.7    1.4   -0.7    1.1   -1.4    4.6  JPL wrt IGS97
 NYAL     0.0    1.8    2.9    1.5   11.5   10.6  JPL wrt IGS97
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 93.75
 
 Transformation of loose solution GFZ to IGS97
 -----------------------------------------------
 For   32 Sites, RMS after 7 parameter transformation   3.0 mm  GFZ wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    0.7 2927.7     -2.9 2927.7      0.2 2927.7  -0.635  0.334  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -0.6    2.5   -1.0    2.4    2.9    8.8  GFZ wrt IGS97
 MAS1     1.1    2.5   -3.9    2.9    3.0   10.9  GFZ wrt IGS97
 BRAZ    -3.7    3.1    1.7    3.3  -13.9   12.5  GFZ wrt IGS97
 KOUR    -3.6    3.0   -0.4    3.3  -12.4   12.8  GFZ wrt IGS97
 BRMU     2.8    3.1   -0.3    3.0  -18.6   13.2  GFZ wrt IGS97
 SANT    -2.6    3.3    4.8    3.2   -8.3    9.4  GFZ wrt IGS97
 WES2     0.3    2.9   -8.5    2.4    6.4    9.9  GFZ wrt IGS97
 ALGO     2.5    2.9    1.5    2.4    6.1    9.4  GFZ wrt IGS97
 NLIB    -1.7    4.0    1.3    4.2   -7.7   19.6  GFZ wrt IGS97
 MDO1    -0.5    2.8    0.4    3.1    2.7   11.7  GFZ wrt IGS97
 YELL    -1.1    3.1    0.6    2.3   -5.4    9.9  GFZ wrt IGS97
 DRAO     3.8    2.7    2.6    2.3   -6.5    8.4  GFZ wrt IGS97
 FAIR     3.9    3.4    2.9    2.6  -24.9   11.4  GFZ wrt IGS97
 KOKB    -0.5    2.9    0.9    4.2   23.1   10.6  GFZ wrt IGS97
 CHAT     3.2    2.9   -1.9    3.0   10.0    9.0  GFZ wrt IGS97
 KWJ1     1.1    8.7   -3.7   20.4  -29.1   37.5  GFZ wrt IGS97
 MCM4     0.9    3.7   -2.2    3.7   -6.0   18.7  GFZ wrt IGS97
 TIDB    -5.3    2.8   -1.8    2.5    4.3    9.6  GFZ wrt IGS97
 HOB2    -3.1    2.7   -1.6    2.3   13.9    8.7  GFZ wrt IGS97
 TSKB    10.2    3.5    2.2    3.2   -4.9   12.7  GFZ wrt IGS97
 CAS1    -5.3    2.6    1.0    2.2    6.3    9.2  GFZ wrt IGS97
 IRKT     0.1    3.4   -3.5    2.8   21.5   10.3  GFZ wrt IGS97
 LHAS    -0.6    3.2   -6.2    3.3    1.6   13.6  GFZ wrt IGS97
 DAV1    -6.1    2.7    0.4    2.4   -6.0    9.5  GFZ wrt IGS97
 KERG    -3.0    4.0    0.7    3.3   -6.5   13.6  GFZ wrt IGS97
 BAHR     1.5    2.7    9.3    2.8   11.9   10.8  GFZ wrt IGS97
 ZWEN    -0.1    2.8    2.5    2.1    0.1    9.1  GFZ wrt IGS97
 MATE    -0.5    3.7    1.5    3.5    9.0   13.6  GFZ wrt IGS97
 POTS     0.8    2.7   -1.6    2.1    2.6    8.5  GFZ wrt IGS97
 WTZR     2.0    2.6   -0.4    2.1    6.8    8.1  GFZ wrt IGS97
 ONSA     3.3    2.6    0.3    2.0  -12.5    8.4  GFZ wrt IGS97
 WSRT     1.7    2.5   -0.6    2.0    1.2    7.9  GFZ wrt IGS97
 Reference sites NOT used 
 MADR    17.8    2.8  -45.2    2.5   -6.0    9.4  GFZ wrt IGS97
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 3.844
 
 Transformation of loose solution SIO to IGS97
 -----------------------------------------------
 For   36 Sites, RMS after 7 parameter transformation   3.4 mm  SIO wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -0.8    6.1      4.0    6.2    -16.8   15.1  -0.720  0.223  SIO  CoM
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.8    1.4   -0.2    2.0    3.1    4.4  SIO wrt IGS97
 MAS1     3.0    1.3   -0.7    2.2   -1.1    4.1  SIO wrt IGS97
 BRAZ    -3.8    3.0    6.1    4.9   -5.7   10.3  SIO wrt IGS97
 KOUR    -3.6    1.8   -4.2    2.9    0.3    5.5  SIO wrt IGS97
 BRMU     1.3    2.1   -2.1    3.9    0.6    8.2  SIO wrt IGS97
 THU1    -1.4    9.2  -10.0   10.6  -21.8   54.2  SIO wrt IGS97
 SANT     1.4    3.7   -0.8    4.8  -29.3    8.7  SIO wrt IGS97
 WES2    -0.5    2.0   -8.5    3.2   13.7    6.1  SIO wrt IGS97
 GODE     3.7    1.9   -2.3    3.0    9.2    5.8  SIO wrt IGS97
 ALGO     0.5    1.8   -0.8    3.2   13.7    5.3  SIO wrt IGS97
 NLIB    -3.8    3.1   12.0    5.9   -0.5   13.9  SIO wrt IGS97
 MDO1    -1.0    2.2   -0.6    4.3   10.2    7.4  SIO wrt IGS97
 PIE1     3.1    2.1    6.1    4.0   14.7    6.5  SIO wrt IGS97
 DRAO     0.7    2.2    2.8    3.1   -2.6    5.8  SIO wrt IGS97
 FAIR     1.3    2.8    3.7    3.5  -24.5    7.5  SIO wrt IGS97
 KOKB    -2.9    2.1    5.3    3.4   18.1    5.3  SIO wrt IGS97
 CHAT     2.6    2.8   -0.5    3.7   -6.5    6.5  SIO wrt IGS97
 KWJ1    -4.8    3.6   -1.9    7.7   -7.7   14.4  SIO wrt IGS97
 MCM4     1.2    2.2   -2.0    2.4   -8.1    8.1  SIO wrt IGS97
 MAC1     4.5    2.1   -3.4    2.9    4.8    5.4  SIO wrt IGS97
 HOB2    -3.6    2.7   -6.4    4.1   19.2    6.7  SIO wrt IGS97
 TSKB     5.0    2.2    1.1    2.8  -10.8    5.5  SIO wrt IGS97
 PERT    -5.0    2.6   -5.4    4.5  -15.2    8.0  SIO wrt IGS97
 CAS1    -0.5    1.9    1.4    2.4    2.7    5.6  SIO wrt IGS97
 IRKT    -2.4    2.6   -2.7    4.0    0.8    7.1  SIO wrt IGS97
 LHAS    -5.9    2.4   -8.4    4.5  -11.5    8.4  SIO wrt IGS97
 DAV1    -3.2    2.2    5.1    2.5   -7.3    5.9  SIO wrt IGS97
 KERG    -2.5    2.2    1.7    2.8   -8.3    6.2  SIO wrt IGS97
 BAHR    -1.3    2.0    6.2    3.2    1.1    6.2  SIO wrt IGS97
 ZWEN    -1.4    2.4    4.8    3.1   -1.0    6.3  SIO wrt IGS97
 MATE    -1.2    1.5    4.3    2.2   11.5    5.2  SIO wrt IGS97
 GRAZ     0.4    1.6   -4.5    1.9   12.2    4.8  SIO wrt IGS97
 POTS     0.6    1.4   -0.2    1.7    3.7    4.0  SIO wrt IGS97
 WTZR     1.8    1.4    0.8    1.7    6.9    3.9  SIO wrt IGS97
 ONSA     3.3    1.4   -0.1    1.6  -12.3    3.8  SIO wrt IGS97
 WSRT     1.9    1.2   -0.2    1.5   -0.6    3.4  SIO wrt IGS97
 Reference sites NOT used 
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 46.888
 
 Transformation of loose solution ESA to IGS97
 -----------------------------------------------
 For   32 Sites, RMS after 7 parameter transformation   5.7 mm  ESA wrt IGS97 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    7.0    5.5     -6.6    5.7    -10.8   17.0   0.091  0.291  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.7    1.5   -1.3    3.2   -4.7    5.7  ESA wrt IGS97
 MAS1    -2.3    5.9   -7.9   13.1   -5.9   17.2  ESA wrt IGS97
 KOUR   -12.3    2.0    1.9    3.7  -18.5    6.9  ESA wrt IGS97
 WES2    -3.0    1.7   -5.8    3.7   14.0    6.2  ESA wrt IGS97
 GODE     2.4    1.5   -2.2    3.3   -1.0    6.1  ESA wrt IGS97
 ALGO     1.6    1.6    0.8    3.2    9.9    5.8  ESA wrt IGS97
 NLIB    -7.5    2.2    7.9    5.3   29.4   11.3  ESA wrt IGS97
 MDO1     0.6    1.8   -4.3    4.6   -4.6    8.4  ESA wrt IGS97
 PIE1     5.1    1.7    4.8    4.2    3.9    7.6  ESA wrt IGS97
 YELL     2.5    1.9    6.7    2.9    7.1    6.6  ESA wrt IGS97
 DRAO     5.7    1.6    5.3    2.9   -5.5    5.5  ESA wrt IGS97
 FAIR    11.0    2.1    5.0    2.9  -29.2    6.8  ESA wrt IGS97
 KOKB     9.5    2.4   -1.1    5.6   24.4    9.6  ESA wrt IGS97
 AUCK    -7.2   25.4  -17.5   49.7  -16.2   57.0  ESA wrt IGS97
 MCM4     9.5    3.2  -10.8    4.5   -8.1   14.4  ESA wrt IGS97
 TIDB    -9.2    1.8   -7.1    3.9    3.6    7.7  ESA wrt IGS97
 HOB2    -7.2    1.7   -4.8    3.3   29.8    6.4  ESA wrt IGS97
 TSKB     9.5    2.5    3.0    4.7    7.3    8.9  ESA wrt IGS97
 PERT    -9.6    2.7   -3.4    6.5   -4.6   12.8  ESA wrt IGS97
 CAS1    -7.5    2.6    9.4    3.4    1.6    7.7  ESA wrt IGS97
 IRKT     3.0    2.4   -2.5    4.3   13.4    7.0  ESA wrt IGS97
 LHAS    -6.2    2.3   -9.2    5.2  -13.4    8.9  ESA wrt IGS97
 BAHR    -3.2    1.7   13.1    3.2   -9.5    6.1  ESA wrt IGS97
 ZWEN    11.1    2.0    7.2    3.4    2.7    7.5  ESA wrt IGS97
 TROM     4.7    1.7    7.1    2.3  -12.6    6.1  ESA wrt IGS97
 GRAZ     0.7    1.8   -4.6    3.6    8.0    6.1  ESA wrt IGS97
 POTS     3.7    2.0   -0.1    3.7   -3.2    7.8  ESA wrt IGS97
 WTZR     4.4    1.8    1.2    3.5   -0.4    6.6  ESA wrt IGS97
 ONSA     4.2    1.8   -2.2    3.0  -19.2    6.3  ESA wrt IGS97
 NYAL     2.0    1.9    2.9    2.2  -11.4    7.2  ESA wrt IGS97
 WSRT     5.4    1.5   -1.3    2.6   -0.1    5.3  ESA wrt IGS97
 Reference sites NOT used 
 
 
 4.0 CENTER FITS TO COMBINED SOLUTION 
 CENTER COD
 -------------------
 VARIANCE RESCALING FACTOR FOR COD 107.1
 
 Transformation of loose solution COD to COMB
 -----------------------------------------------
 For   39 Sites, RMS after 7 parameter transformation   1.4 mm  COD wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -4.9    2.7     -8.2    2.7    -27.5    3.6  -2.026  0.122  COD  CoM
 
 Adjustments to core site positions for COD
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -0.7    1.0    0.1    0.9   -9.0    3.7  COD wrt COMB
 MAS1     0.5    1.1   -0.2    1.1   -9.7    4.4  COD wrt COMB
 BRAZ     0.8    1.2   -0.4    1.2    2.1    4.7  COD wrt COMB
 KOUR     0.2    0.9   -0.3    0.9    0.4    3.0  COD wrt COMB
 BRMU     0.6    1.3   -0.3    1.3   -1.7    5.9  COD wrt COMB
 SANT     0.0    1.3   -1.2    1.0    8.1    3.3  COD wrt COMB
 WES2     0.7    1.2   -0.5    1.0   -8.7    4.4  COD wrt COMB
 GODE    -0.3    1.1   -1.0    1.0   -3.4    3.9  COD wrt COMB
 ALGO    -0.8    1.1   -0.4    0.9    0.5    3.5  COD wrt COMB
 NLIB     1.2    1.5    1.2    1.5  -13.2    7.3  COD wrt COMB
 MDO1    -1.1    1.3    1.1    1.2    3.9    5.3  COD wrt COMB
 PIE1    -0.6    1.2    0.3    1.2    6.2    5.0  COD wrt COMB
 YELL    -1.5    1.2    0.3    0.8    4.1    3.4  COD wrt COMB
 DRAO    -0.2    1.1    0.2    0.9   -0.6    3.2  COD wrt COMB
 FAIR    -1.4    1.5   -0.3    1.0    6.4    4.4  COD wrt COMB
 CHAT     0.4    1.0    0.2    0.9  -15.2    3.1  COD wrt COMB
 AUCK    -0.2    4.2    0.3    3.9   -2.0   15.2  COD wrt COMB
 KWJ1     1.5    1.5    0.6    1.6   12.4    6.7  COD wrt COMB
 MCM4    -0.5    1.3   -1.6    1.0    3.5    6.6  COD wrt COMB
 MAC1    -1.1    1.0   -0.1    0.8   -6.6    3.0  COD wrt COMB
 TIDB     0.3    1.0   -0.3    0.8   -8.2    3.8  COD wrt COMB
 HOB2    -0.3    0.9   -0.2    0.8   -5.1    3.1  COD wrt COMB
 TSKB     1.1    1.7    0.2    1.4   15.7    6.2  COD wrt COMB
 PERT     0.3    1.0   -0.7    1.0    2.5    4.3  COD wrt COMB
 YAR1     0.5    0.9   -0.6    0.9    0.5    3.4  COD wrt COMB
 CAS1    -2.2    1.0   -0.3    0.8    3.8    3.4  COD wrt COMB
 IRKT    -1.7    1.4   -0.1    1.1   14.6    4.4  COD wrt COMB
 LHAS     2.3    1.5   -0.1    1.4    6.8    5.8  COD wrt COMB
 DAV1    -1.6    0.9   -0.5    0.9    4.5    3.0  COD wrt COMB
 KERG    -0.7    1.5    0.4    1.1    0.5    4.8  COD wrt COMB
 BAHR     1.3    0.9    1.4    0.9   -4.6    3.6  COD wrt COMB
 MALI     1.4    1.3    1.5    1.5    8.0    5.7  COD wrt COMB
 ZWEN    -3.0    1.1    0.4    0.8    0.3    3.3  COD wrt COMB
 MATE     0.6    1.3   -0.1    1.1    0.1    4.9  COD wrt COMB
 GRAZ    -0.1    1.0    0.6    0.8   -1.2    3.4  COD wrt COMB
 POTS    -0.5    1.0    0.1    0.8   -0.1    3.1  COD wrt COMB
 WTZR    -0.5    1.0   -0.1    0.8   -4.4    3.4  COD wrt COMB
 ONSA    -0.7    1.1   -0.5    0.8   -2.5    3.4  COD wrt COMB
 WSRT    -1.2    0.9    0.2    0.7   -1.9    2.8  COD wrt COMB
 Reference sites NOT used 
 MADR    -0.9    1.2    0.1    1.0   -2.5    4.5  COD wrt COMB
 
 CENTER EMR
 -------------------
 VARIANCE RESCALING FACTOR FOR EMR 68.425
 
 Transformation of loose solution EMR to COMB
 -----------------------------------------------
 For   19 Sites, RMS after 7 parameter transformation   1.8 mm  EMR wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -9.7   16.7     -3.2   18.6     -1.8   19.6  -0.776  0.600  EMR  CoM
 
 Adjustments to core site positions for EMR
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -3.8    3.2   -0.1    2.9    4.0   11.7  EMR wrt COMB
 ALGO    -0.6    3.4    0.7    3.0    3.4   11.7  EMR wrt COMB
 MDO1     0.1    3.5   -2.1    3.6   -7.0   13.9  EMR wrt COMB
 YELL    -0.2    3.6   -1.1    2.5    1.9   12.1  EMR wrt COMB
 DRAO    -0.7    3.4   -1.8    2.7   -0.5   11.3  EMR wrt COMB
 FAIR     0.2    3.9   -0.6    2.9   -4.9   13.2  EMR wrt COMB
 KOKB    -3.6    3.8    1.1    4.8   -5.5   14.9  EMR wrt COMB
 CHAT     1.3    7.3    6.0   11.4  -11.2   25.3  EMR wrt COMB
 KWJ1    -2.3    8.0   -7.0   12.1   -4.8   34.8  EMR wrt COMB
 MAC1     1.3    4.5    3.2    4.4   -6.5   15.6  EMR wrt COMB
 TSKB     1.5    4.2    0.8    3.9    6.7   14.3  EMR wrt COMB
 PERT     2.0    4.4    2.5    5.1    8.5   17.6  EMR wrt COMB
 CAS1     0.3    4.4   -0.4    3.7   -7.3   16.1  EMR wrt COMB
 IRKT     1.1    4.2    0.1    3.4    4.0   13.0  EMR wrt COMB
 KERG     1.5    4.6   -2.6    4.5    9.8   15.3  EMR wrt COMB
 BAHR     2.0    3.4   -1.6    3.4    8.2   13.0  EMR wrt COMB
 MATE     0.1    4.3    1.6    3.7    0.6   16.0  EMR wrt COMB
 NYAL     0.4    3.1    0.8    2.6    4.2   16.5  EMR wrt COMB
 WSRT    -1.5    3.4    0.9    2.6   -8.5   11.1  EMR wrt COMB
 Reference sites NOT used 
 
 CENTER JPL
 -------------------
 VARIANCE RESCALING FACTOR FOR JPL 12.35
 
 Transformation of loose solution JPL to COMB
 -----------------------------------------------
 For   26 Sites, RMS after 7 parameter transformation   2.8 mm  JPL wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    3.6    5.5     -0.3    5.8     15.4    6.0  -2.539  0.200  JPL  CoM
 
 Adjustments to core site positions for JPL
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 KOUR     0.0    1.3    0.5    1.3   10.1    5.1  JPL wrt COMB
 BRMU    -1.0    1.7    0.4    1.5  -10.0    7.1  JPL wrt COMB
 SANT     2.8    1.7    3.8    1.3   14.0    5.4  JPL wrt COMB
 ALGO     0.1    1.4   -0.8    1.1  -19.0    4.7  JPL wrt COMB
 PIE1    -0.1    2.4   -1.5    2.3  -21.2   10.1  JPL wrt COMB
 YELL     0.2    1.5   -1.7    1.1  -20.7    5.2  JPL wrt COMB
 DRAO    -0.2    3.6   -0.5    2.7    5.5   12.1  JPL wrt COMB
 FAIR     0.6    1.6   -0.8    1.2    7.7    5.6  JPL wrt COMB
 KOKB    -1.7    1.3   -1.7    1.4    4.9    5.5  JPL wrt COMB
 CHAT     1.1    1.4    2.3    1.2    9.0    4.9  JPL wrt COMB
 KWJ1     0.7    2.4    1.3    3.0  -24.3   11.2  JPL wrt COMB
 MCM4    -1.5    2.1    2.4    1.8   -3.3    9.6  JPL wrt COMB
 MAC1     2.5    1.4    1.5    1.0   15.1    4.7  JPL wrt COMB
 TIDB     3.7    1.3    2.2    1.1   23.1    4.8  JPL wrt COMB
 HOB2     4.2    1.7    2.9    1.3    5.2    5.8  JPL wrt COMB
 TSKB    -0.1    1.5    1.2    1.2  -16.4    5.4  JPL wrt COMB
 PERT     1.6    1.3    1.2    1.2   -4.6    5.5  JPL wrt COMB
 CAS1     2.3    1.6   -0.8    1.2   -2.8    6.3  JPL wrt COMB
 IRKT    -1.5    1.6   -0.4    1.2  -16.6    4.8  JPL wrt COMB
 DAV1     3.5    1.6   -2.0    1.3    2.8    5.9  JPL wrt COMB
 KERG     2.1    1.5   -3.7    1.3   11.0    5.3  JPL wrt COMB
 BAHR    -1.1    1.3   -1.2    1.2   11.1    5.1  JPL wrt COMB
 MALI     1.1    2.4   -7.8    3.1  -22.5   11.6  JPL wrt COMB
 WTZR    -0.2    1.4    0.3    1.1    3.7    4.7  JPL wrt COMB
 ONSA     0.5    1.5    0.7    1.1    7.8    4.7  JPL wrt COMB
 NYAL    -0.1    1.8    0.0    1.5   10.4   10.6  JPL wrt COMB
 Reference sites NOT used 
 
 CENTER GFZ
 -------------------
 VARIANCE RESCALING FACTOR FOR GFZ 93.75
 
 Transformation of loose solution GFZ to COMB
 -----------------------------------------------
 For   33 Sites, RMS after 7 parameter transformation   1.4 mm  GFZ wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    1.0 2927.7     -2.7 2927.7      0.7 2927.7  -0.793  0.329  GFZ  CoM
 
 Adjustments to core site positions for GFZ
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL    -1.7    2.5   -1.5    2.4    2.8    8.8  GFZ wrt COMB
 MAS1    -1.3    2.5   -3.4    2.9    8.8   10.9  GFZ wrt COMB
 BRAZ     1.8    3.1    0.1    3.3  -14.3   12.5  GFZ wrt COMB
 KOUR     1.5    3.1   -0.6    3.4   -9.3   12.8  GFZ wrt COMB
 BRMU     0.3    3.1    0.9    3.0    2.0   13.2  GFZ wrt COMB
 SANT     1.6    3.3    0.1    3.2   -3.5    9.4  GFZ wrt COMB
 WES2     1.5    2.9   -0.5    2.4    0.9    9.9  GFZ wrt COMB
 ALGO     0.7    2.9    0.8    2.4    4.9    9.4  GFZ wrt COMB
 NLIB     1.6    4.0   -0.2    4.2   -2.6   19.6  GFZ wrt COMB
 MDO1     0.2    2.8    0.3    3.1   -3.8   11.7  GFZ wrt COMB
 YELL    -0.4    3.1   -0.6    2.4    2.2    9.9  GFZ wrt COMB
 DRAO     0.6    2.7   -0.2    2.3   -2.6    8.4  GFZ wrt COMB
 FAIR    -0.5    3.4    0.7    2.6  -10.6   11.4  GFZ wrt COMB
 KOKB    -0.1    2.9    6.5    4.2   -1.0   10.6  GFZ wrt COMB
 CHAT     1.9    3.0   -2.4    3.0    6.4    9.1  GFZ wrt COMB
 KWJ1     0.3    8.7   -1.6   20.4  -19.2   37.5  GFZ wrt COMB
 MCM4    -0.1    3.7    2.6    3.7    4.3   18.7  GFZ wrt COMB
 TIDB    -1.7    2.8   -1.8    2.6    6.1    9.6  GFZ wrt COMB
 HOB2    -0.1    2.8   -1.4    2.4    6.4    8.7  GFZ wrt COMB
 TSKB     0.3    3.5   -1.0    3.2   -5.0   12.7  GFZ wrt COMB
 CAS1     0.8    2.6   -0.1    2.2    7.7    9.2  GFZ wrt COMB
 IRKT    -0.7    3.4    0.4    2.8    6.0   10.3  GFZ wrt COMB
 LHAS    -0.1    3.2    3.7    3.3    0.0   13.6  GFZ wrt COMB
 DAV1     1.4    2.7   -0.6    2.4    1.1    9.5  GFZ wrt COMB
 KERG     0.2    4.0    2.0    3.3    0.9   13.7  GFZ wrt COMB
 BAHR    -1.1    2.7    0.1    2.8    6.9   10.8  GFZ wrt COMB
 MALI    -0.3    3.1   -0.2    3.7   -1.5   13.7  GFZ wrt COMB
 ZWEN    -0.1    2.8    0.0    2.1   -6.9    9.1  GFZ wrt COMB
 MATE    -0.7    3.7   -0.3    3.5   -1.8   13.6  GFZ wrt COMB
 POTS     0.1    2.7   -0.3    2.1   -0.7    8.5  GFZ wrt COMB
 WTZR     0.0    2.6   -0.4    2.1    0.9    8.1  GFZ wrt COMB
 ONSA     0.5    2.6    0.3    2.1   -2.3    8.4  GFZ wrt COMB
 WSRT    -0.2    2.5   -0.7    2.1    0.9    7.9  GFZ wrt COMB
 Reference sites NOT used 
 MADR     0.6    2.8   -1.8    2.5    8.1    9.4  GFZ wrt COMB
 
 CENTER SIO
 -------------------
 VARIANCE RESCALING FACTOR FOR SIO 3.844
 
 Transformation of loose solution SIO to COMB
 -----------------------------------------------
 For   36 Sites, RMS after 7 parameter transformation   2.5 mm  SIO wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
   -0.6    6.1      4.8    6.2    -17.7   15.1  -0.669  0.235  SIO  CoM
 
 Adjustments to core site positions for SIO
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     1.4    1.4   -1.0    2.0    2.7    4.4  SIO wrt COMB
 MAS1     1.4    1.3   -0.4    2.2    4.2    4.1  SIO wrt COMB
 BRAZ     3.0    3.2    4.6    5.0   -7.4   10.4  SIO wrt COMB
 KOUR     2.6    1.9   -4.3    2.9    2.7    5.5  SIO wrt COMB
 BRMU    -0.4    2.1   -0.5    3.9   21.1    8.2  SIO wrt COMB
 THU1    -3.2    9.2   -1.9   10.6    3.5   54.2  SIO wrt COMB
 WES2     1.3    2.1   -0.1    3.2    8.3    6.1  SIO wrt COMB
 GODE     1.4    1.9   -0.5    3.0    9.5    5.8  SIO wrt COMB
 ALGO    -0.8    1.7   -1.0    3.2   12.6    5.3  SIO wrt COMB
 NLIB     0.2    3.0   11.1    5.8    4.5   13.8  SIO wrt COMB
 MDO1     0.6    2.1    0.0    4.1    3.5    7.3  SIO wrt COMB
 PIE1     0.4    2.1    0.8    4.0    4.5    6.5  SIO wrt COMB
 GOL2    -0.2    2.1    2.7    3.5    1.8    7.0  SIO wrt COMB
 DRAO    -1.8    2.1    0.8    3.0    1.2    5.8  SIO wrt COMB
 FAIR    -2.4    2.7    2.4    3.5  -10.2    7.5  SIO wrt COMB
 CHAT     2.4    2.8   -0.2    3.7  -12.4    6.6  SIO wrt COMB
 KWJ1    -3.9    3.7    1.1    7.8    0.8   14.4  SIO wrt COMB
 MCM4     0.5    2.2    3.4    2.4   -0.6    8.2  SIO wrt COMB
 MAC1     2.9    2.1   -0.5    2.8    2.9    5.4  SIO wrt COMB
 HOB2     0.3    2.7   -5.5    4.1    9.0    6.7  SIO wrt COMB
 TSKB    -3.2    2.3   -1.6    2.9  -11.8    5.6  SIO wrt COMB
 PERT    -2.8    2.6   -4.2    4.5   13.1    8.0  SIO wrt COMB
 CAS1     5.7    1.9    0.7    2.4    1.2    5.6  SIO wrt COMB
 IRKT    -1.8    2.6    1.2    4.0  -15.3    7.1  SIO wrt COMB
 LHAS    -3.8    2.4    1.5    4.5  -14.1    8.4  SIO wrt COMB
 DAV1     4.3    2.2    4.1    2.4   -3.0    5.9  SIO wrt COMB
 KERG     1.2    2.1    3.0    2.8   -3.6    6.2  SIO wrt COMB
 BAHR    -2.7    1.9   -3.3    3.2   -4.9    6.2  SIO wrt COMB
 MALI    -4.6    3.9   -8.0    7.5  -16.5   16.9  SIO wrt COMB
 ZWEN    -0.6    2.4    1.8    3.1   -8.3    6.3  SIO wrt COMB
 MATE    -0.6    1.5    2.2    2.2    0.3    5.2  SIO wrt COMB
 GRAZ     0.8    1.6    0.1    1.9    0.2    4.8  SIO wrt COMB
 POTS     0.5    1.4    0.7    1.7    0.2    4.0  SIO wrt COMB
 WTZR     0.5    1.4    0.4    1.7    0.6    4.0  SIO wrt COMB
 ONSA     1.0    1.4   -0.5    1.6   -2.2    3.8  SIO wrt COMB
 WSRT     0.6    1.2   -0.7    1.5   -1.0    3.4  SIO wrt COMB
 Reference sites NOT used 
 
 CENTER ESA
 -------------------
 VARIANCE RESCALING FACTOR FOR ESA 46.888
 
 Transformation of loose solution ESA to COMB
 -----------------------------------------------
 For   32 Sites, RMS after 7 parameter transformation   4.0 mm  ESA wrt COMB 
   X-tran  +-      Y-tran  +-      Z-tran   +-   Scale   +-
   (mm)   (mm)     (mm)   (mm)      (mm)   (mm)  (ppb)  (ppb)
    6.3    5.5     -6.8    5.7    -11.7   17.0  -0.120  0.288  ESA  CoM
 
 Adjustments to core site positions for ESA
 SITE    dNorth  +-     dEast   +-    dUp    +- 
          (mm)  (mm)    (mm)   (mm)   (mm)  (mm)
 VILL     2.0    1.5   -1.3    3.2   -2.7    5.7  ESA wrt COMB
 MAS1    -3.0    5.9   -6.7   13.2    1.7   17.3  ESA wrt COMB
 KOUR    -5.5    2.0    3.0    3.7  -14.6    6.9  ESA wrt COMB
 WES2    -0.8    1.7    2.9    3.7    9.7    6.2  ESA wrt COMB
 GODE     0.5    1.6   -0.2    3.3    0.5    6.1  ESA wrt COMB
 ALGO     0.8    1.6    0.7    3.2    9.9    5.8  ESA wrt COMB
 NLIB    -3.2    2.2    7.1    5.3   35.4   11.3  ESA wrt COMB
 MDO1     2.3    1.8   -3.6    4.6  -10.6    8.4  ESA wrt COMB
 PIE1     2.3    1.7   -0.5    4.3   -5.6    7.6  ESA wrt COMB
 YELL     3.9    1.9    5.8    2.9   15.9    6.7  ESA wrt COMB
 DRAO     3.3    1.7    2.9    2.9   -0.7    5.5  ESA wrt COMB
 FAIR     7.2    2.1    3.0    3.0  -13.7    6.9  ESA wrt COMB
 KOKB    10.7    2.4    4.8    5.7    0.1    9.6  ESA wrt COMB
 AUCK    -6.6   25.4  -15.3   49.7   -4.3   57.0  ESA wrt COMB
 MCM4     7.0    3.2   -7.2    4.5    0.9   14.4  ESA wrt COMB
 TIDB    -5.5    1.8   -8.1    4.0    4.4    7.7  ESA wrt COMB
 HOB2    -4.3    1.8   -5.8    3.3   21.1    6.5  ESA wrt COMB
 TSKB     0.6    2.5   -0.4    4.7    8.0    8.9  ESA wrt COMB
 PERT    -7.3    2.7   -4.1    6.6   25.6   12.8  ESA wrt COMB
 CAS1    -0.9    2.6    6.3    3.4    2.0    7.7  ESA wrt COMB
 IRKT     3.1    2.4    1.3    4.4   -0.5    7.0  ESA wrt COMB
 LHAS    -4.3    2.3    0.5    5.2  -13.5    8.9  ESA wrt COMB
 BAHR    -4.1    1.6    3.9    3.3  -12.6    6.1  ESA wrt COMB
 MALI    -9.7    2.7   -5.8    8.0  -23.8   12.6  ESA wrt COMB
 ZWEN    12.2    2.0    4.8    3.4   -2.1    7.5  ESA wrt COMB
 TROM     3.4    1.7   -1.2    2.3   -4.7    6.1  ESA wrt COMB
 GRAZ     1.6    1.8    0.8    3.7   -1.5    6.1  ESA wrt COMB
 POTS     4.1    2.0    1.5    3.8   -4.3    7.8  ESA wrt COMB
 WTZR     3.6    1.8    1.6    3.5   -4.2    6.6  ESA wrt COMB
 ONSA     2.4    1.8   -1.9    3.0   -6.8    6.3  ESA wrt COMB
 NYAL     2.8    1.9   -0.8    2.2   -9.2    7.2  ESA wrt COMB
 WSRT     4.6    1.5   -1.0    2.7    1.8    5.3  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)
52462.50  231957  441338 -2311437    142    38    39    6701      47 182  0  0    783  -3118     50     50     .008   .000   .000
52463.50  232659  438174 -2312061   1149    37    37    6734      42 182  0  0    622  -3211     40     39    -.001   .000   .000
52464.50  233451  434981 -2313575   1971    37    37    6767      42 182  0  0    964  -3175     38     39    -.001   .000   .000
52465.50  234647  431981 -2315543   2135    37    37    6800      42 182  0  0   1427  -2826     38     39    -.002   .000   .000
52466.50  236076  429085 -2317245   1441    37    37    6833      41 182  0  0   1432  -2968     37     38    -.002   .000   .000
52467.50  237450  426149 -2317999    170    37    37    6865      42 182  0  0   1315  -2903     39     40    -.003   .000   .000
52468.50  238641  423105 -2319315   2481    38    39    6898      48 182  0  0   1068  -3185     49     51    -.004   .000   .000



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