[IGSREPORT-20531] Wk 1671 IGS Final Orbits

IGS ACC igs.acc at noaa.gov
Thu Feb 2 08:55:22 PST 2012


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1671   (Jan 15, 2012 - Jan 21, 2012)

Contacts: J. Griffiths (jake.griffiths at noaa.gov)
          K. Choi (kevin.choi at noaa.gov)


COMBINATION STRATEGY:
---------------------

Starting with GPS week 860, the IGS Final orbit combination is done directly
in the ITRF without any alignment to the Bulletin B EOP series.

Each centre satellite clock corrections are first transformed to a common 
reference. One of the following two methods can be used (the REMARKS section of
this report gives which method is used):
[1] For each centre, a clock offset and a drift are estimated with respect to
    the broadcast clock corrections using only non-SA satellites;
[2] A chosen reference centre is aligned to the broadcast clock corrections
    using all satellites. All other centres are then aligned to that reference
    centre. 
The offsets and drifts are used to align each centre satellite clock
corrections to GPS time. Ephemerides and clock corrections are then combined
as weighted averages computed over all centres. Each centre is given a
position weight and a clock weight. The position weights are computed from
each centre's absolute deviation to the unweighted average orbit after the
estimation of a 7-parameter Helmert transformation. The clock weights are
either computed from [1] the absolute deviation of the initial alignment to
broadcast clock for the non-SA satellites, or [2] from the absolute deviation
of centre's aligned clock corrections with respect to the unweighted mean.
Finally, a 7-parameter Helmert transformation and clock offset and drift are
estimated for each centre with respect to the combined solutions and parameters
and RMS of fit reported. All the above estimations are performed using the
L1-norm robust scheme.

  Each centre ephemerides are also evaluated individually and independently from
the orbit combination by using week long arcs. The Earth Orientation Parameters
(EOP) used in this evaluation are those submitted by the respective centres.
The IGS combined orbits/clocks and all centres providing both orbit and clock 
solutions are further evaluated by an independent point positioning (navigation)
program that uses both phase and pseudorange data. This is primarily intended 
for testing clock solution precision as well as the orbit/clock consistency.

 Like the clock solutions broadcast in the navigation message, the combined
satellite clocks are corrected for the periodical relativistic correction (see
e.g. GPS interface Control document ICD-GPS-200, p.73):

                              -2*(X.V)/c  [distance unit],

where X and V are the inertial sv state and velocity vectors and c is the speed
of light. Also for compatibility, no satellite L1/L2 delay calibration should be
applied.


SOFTWARE:
---------

The weighted average software used was originally developed by T. Springer
and G. Beutler in 1993. The GPS long arc orbit analysis software used here for
individual centre ephemeris evaluation was developed by Beutler et al. at the
Astronomical Institute of the University of Bern (AIUB). For more details on
the orbit combination and complete references for both software see:

  Beutler G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS 
  Analysis Centers, Bulletin Geodesique, 69, pp 200-222.

  Kouba J., Mireault Y. and F. Lahaye, 1995, 1994 IGS Orbit/Clock Combination
  and Evaluation, Appendix I of the Analysis Coordinator Report, International
  GPS Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.

  Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1995 Annual Report, 
  pp. 45-76.

  Kouba J. and Y. Mireault, 1997, Analysis Coordinator Report, 
  International GPS Service for Geodynamics (IGS) 1996 Annual Report, 
  pp. 55-100.


PRODUCTS GENERATED:
-------------------

The resulting average ephemeris and clocks are output to daily files in SP3
format. The satellite accuracy codes displayed in the header are based on the
weighted RMS for each satellite. Note that each file contains all the
satellites that appear in any of the centre ephemeris files. If a satellite or
centre was excluded from combination, a note in the REMARKS section of this
report will identify the exclusion and the reason.

  The resulting x and y earth rotation parameters (ERP) associated with the IGS
ephemeris files and their rates (xrt, yrt) are computed using a weighted average
of all available centres (as part of the separate SINEX combination since GPS
week 1051; weighted according to the orbit combination before that time). 

  Starting with GPS wk 0894, IGS LOD combinations were implemented in the 
Final IGS solutions.  AC LOD biases with respect to Bulletin A are estimated
using Bulletin A most recent 3 weeks (21 days), i.e. up to 5 days prior to
the last non-predicted day of Bulletin A.  AC LOD biases are removed and the
new AC bias-free LODs are used to compute a weighted IGS LOD which in turn
is integrated into IGS UT1-UTC. The starting UT1-UTC value is chosen as
Bulletin A fifth day prior to its last non-predicted day. Both IGS LOD and 
UT1-UTC values are printed in the IGS Final erp file.



The Final Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:

igs1671[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1671[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1671[0-6].cls  IGS GPS clock combination summary report.
igs16717.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16717.sum      Complete report.

    
REMARKS concerning the IGS Orbit Combination:                                  
---------------------------------------------

 1. The centres used in the clock combination are COD, EMR, ESA, GFZ, MIT, and
    JPL. The other centres are excluded because of poorer consistency (GRG),
    they provide broadcast clocks (NGS), or clock corrections are not provided
    (SIO).  The clock information not used is still compared to combination for
    completeness.  
    The value of 999999.999999 microseconds, according to the sp3 format 
    convention, is used to signify that no clock solution is available and 
    therefore must not be used.

 2. Rapid (IGR) orbits/clocks are included in the combination for statistics only.
    Starting week 1582, a new solution from CNES/GRGS (GRG) is included with
    weight except for the clock and LOD combinations.

 3. The following centre clock solutions, which provide broadcast clock
    corrections, were excluded from the combination but kept in the combination
    statistics:
             -> Centre: NGS 

 4. The following clock solutions were excluded from the combination because they
    were biasing the combined clock solutions (clock shifts/outliers) but were
    kept for the RMS computation.  Duplicate entries can arise due to separate
    combination runs for the 30-s clocks ACs (listed first) and the 5-min clock
    ACs (listed second).
    
               Day | Centre | PRN/STA list
               ----+--------+---------------
                0  |  COD   | MOBS
                0  |  EMR   | 3 6 3 6
                0  |  ESA   | KOUR
                0  |  GFZ   | 3 13 14 23 26 COCO DAV1 HYDE WAB2 YAR2
                0  |  GRG   | AMC2 KOUR LPGS TLSE USNO
                0  |  JPL   | 6 26 30 AREQ
                0  |  MIT   | 3 6 7 8 15 26 31 3 6 7 8 15 26 31 CAS1 DAV1 NICO
                0  |  MIT   | CAS1 DAV1 NICO
                1  |  COD   | 30 SOFI SUTM TIXI XMIS
                1  |  EMR   | 3 6 3 6 WUHN
                1  |  ESA   | WHIT TIXI WHIT
                1  |  GFZ   | 3 6 13 14 23 26 29 BRFT COCO NYAL WHIT
                1  |  GRG   | AMC2
                1  |  JPL   | 6 9 26
                1  |  MIT   | 3 4 6 8 18 26 28 30 3 4 6 8 18 26 28 30 DAV1 MAW1
                1  |  MIT   | NYAL CAS1 MAW1 NYAL
                2  |  COD   | XMIS
                2  |  EMR   | 3 30 6
                2  |  ESA   | KOUR
                2  |  GFZ   | 3 5 6 14 26 WSRT
                2  |  GRG   | AMC2 KOUR LPGS
                2  |  JPL   | 6 AREQ
                2  |  MIT   | 3 6 26 30 3 6 26 30 NICO NICO
                3  |  COD   | 6 6 MOBS MOBS
                3  |  EMR   | 3 3
                3  |  ESA   | 6 6 KOUR UNSA
                3  |  GFZ   | 3 6 14 26 WTZR
                3  |  GRG   | KOUR USN3
                3  |  JPL   | 3 6 AREQ KOUR
                3  |  MIT   | 3 26 3 26 MAW1 CAS1 MAW1
                4  |  COD   | WROC
                4  |  EMR   | 3 6 3 6
                4  |  ESA   | UNSA
                4  |  GFZ   | 3 6 14 26 NYAL
                4  |  GRG   | KOUR USN3
                4  |  JPL   | 3 26 KOUR YELL
                4  |  MIT   | 3 6 26 3 6 26 YELL YELL
                5  |  COD   | SUTM XMIS
                5  |  EMR   | 3 6 3 6
                5  |  ESA   | UNSA
                5  |  GFZ   | 3 5 6 17 26 BRAZ BRFT GRAZ OHI2 REUN TWTF WSRT
                5  |  GRG   | AMC2
                5  |  JPL   | 3 6 26
                5  |  MIT   | 3 6 26 3 6 26 MAW1 GRAZ MAW1
                6  |  COD   | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
                6  |  COD   | 21 22 23 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7 8
                6  |  COD   | 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26
                6  |  COD   | 27 28 29 30 31 32
                6  |  ESA   | 3 3 KOUR UNSA
                6  |  GFZ   | 3 6 19 26 THTI
                6  |  GRG   | AMC2 KOUR
                6  |  JPL   | AREQ
                6  |  MIT   | 1 6 7 26 1 6 7 9 26 CAS1 HYDE MAW1

 5. The following orbit solutions were excluded from the combination because 
    they were biasing the weighted average (generally indicated by long arc RMS).
    They were still used for statistics computation.
    
               Day | Centre | PRN list
               ----+--------+---------------
                6  |  JPL   | ALL (high Transformation - See Table 2)

 6. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011
    (GPS Week 1631, day 6, MJD 55667) all IGS products, including the IGS
    combined orbits, are based on the IGS realization of the ITRF2005 reference
    frame (IGS05).   For more information see IGSMAIL #5447.  The IGS05 frame
    is also the basis for the homogeneously reprocessed IGS products from GPS
    Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) all IGS products,
    are based on the IGS realization of the ITRF2008 reference frame (IGS08).
    For more information see IGSMAIL #6354.
    

 7. Small rotations were applied to all the AC orbit and ERP values in order
    to align them to the current IGS reference frame. These rotations were
    estimated in the IGS SINEX combination process, performed by the IGS Reference
    Frame Coordinator at the Institut Geographique National (IGN). The estimated 7
    transformations, from which only the 3 rotations are applied to the orbit and
    ERP values, are:
    
            |    DX     DY     DZ      RX     RY     RZ     SCL
     Centre |   [mm]   [mm]   [mm]   [uas]  [uas]  [uas]   [ppb]
     -------+---------------------------------------------------
       COD  |   -1.3    -.4   -1.7     -37    -16      8     .20
       EMR  |    4.2    -.7   22.8      10     13      0     .48
       ESA  |    8.1    3.7    3.6      98   -187    120     .15
       GFZ  |   -2.0     .6   -1.8     -54     17    -10     .26
       GRG  |    8.2   -7.5   -3.3     -27     32    -36     .21
       JPL  |    4.1    2.2   10.2     -48    109      0     .40
       MIT  |    9.6   -1.1   -1.9     -31     12    -42     .29
       NGS  |    6.5    1.1   -3.2      16    -56     42     .32
       SIO  |    6.8    3.6   19.3      42    -76     36     .21


 8. Starting on 22-Oct-2000 (GPS Week 1085-0; mjd=51839) all IGS clock products
    are based on the new clock combination scheme which uses the clock RINEX
    files as input if available, otherwise SP3 clocks are used. 
    The navigation solution is still based on the SP3 clocks but this will soon
    adopt the clock RINEX files as well.

 9. Starting on 27-Feb-2000 (GPS Week 1051-0; MJD 51601) the IGS final products
    are aligned to the IGS reference frame products (station coordinates and
    ERPs as generated by IGN). For more information see IGSMAIL #2750.
    Because of this change in alignment Table 2 has been enhanced with one 
    additional line per AC. This additional line shows the X- and Y-rotations 
    which were applied to each of the AC orbits prior to the orbit combination. 
    These rotations are based on the difference between the individual AC ERP 
    estimates and the IGS reference frame ERP product. The total rotation of
    the individual AC orbits w.r.t. the IGS combined orbit is the sum of the
    values in the two lines of Table 2 plus the reference frame rotation.

10. Starting 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) until 16-Apr-2011
    (GPS Week 1631, day 6, MJD 55667) the absolute antenna model is introduced
    (IGSMAIL #5438). The antenna phase center offsets and phase center
    variations are given in the file:
        ftp://igs.org/igscb/station/general/igs05.atx
    These antenna calibrations are also used in the homogeneously reprocessed
    IGS products from GPS Weeks 730 to 1459 (1994-2007); see IGSMAIL #6136.
    Starting 17-Apr-2011 (GPS Week 1632, day 0, MJD 55668) the absolute antenna
    model is updated (IGSMAIL #6255 & #6374) as given in the file:
        ftp://igs.org/igscb/station/general/igs08.atx
    The JPL solution did not use IGS08/igs08.atx until GPS Week 1649, which
    caused their RMS clock residuals to be higher during that period than for
    the other centres; since GPS Week 1632 the JPL solution is excluded from
    the weekly SINEX combination.

    
ORBIT COMBINATION AND EVALUATION STATISTICS:                                    
--------------------------------------------                                    
      
Most combination statistics are with respect to the combined orbits and
consist of five parts. The first, Table 1, summarizes all statistics for
the week.  It contains means and standard deviations over the week of
satellite ephemeris and clock correction transformation parameters for
each centre (table 1.1671.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1671.b).
The second part, Table 2, contains the complete ephemeris and clock
correction transformation parameters (includes both the apriori and a
posteriori values) for each centre and each day (tables 2.1671.[0-6]).
The third part, Table 3, contains two types of daily RMS for each satellite
and centre, along with the computed satellite position sigmas for the
combined orbits (tables 3.1671.[0-6]). The first type of satellite RMS is
based on orbit combination and the second RMS type is a result of the 7-day
arc evaluation of each centre ephemerides. The fourth part, Table 4, is a
weekly summary of the daily precise navigation summaries for centres
providing both orbit and clock solutions.  It contains weekly station RMS
w.r.t. the initial coordinates for the Latitude, Longitude and Height 
components for up to three IGS stations (table 4.1307). The fifth and final
part, Table 5, is similar to Table 4 and contains daily precise navigation
statistics (tables 5.1671.0-6).

In tables 1-3, the most important statistic which is meaningful for intra
centre/satellite analysis is labeled WRMS. It is a weighted RMS where
normalized weights are based on accuracy codes given in the SP3 files, and
should not be affected by downweighted/problem satellites when acknowledged
by individual centres in their SP3 file.
                                                                               

             
Table 1: Week 1671 summary.                       (Jan 15, 2012 - Jan 21, 2012)

Table 1.1671.a   GPS week: 1671   MJD: 55941.000-55947.000

         Mean and standard deviations of transformation parameters to the 
         combined IGS orbit.
         WRMS - orbit RMS weighted by the SP3 header accuracy codes.
         STA  - Mean number of stations in the daily solutions.
   
CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0     0     7    52    -5   -18  -.36   10    9 |     132   -1352    317    379
        |    0     0     1    24    19    20   .01           |     548     616
emr  100|   -1     0    15   -13   -77   -40   .33   19   19 |    3269      28     18     97
        |    0     1     1    23    30    14   .04           |     685    1510
esa  129|    0     1     0  -119   203    55   .11    8    8 |      41    -352     16    133
        |    0     0     2    18    31    13   .03           |    1508    1319
gfz  193|   -1    -1    -6    79  -107   -15   .50   12   12 |      31     -16     31    106
        |    0     0     1    77    63    17   .02           |     186     325
grg  122|    2    -1    -6    39  -105   -29   .62   15   13 |      57     -23     56    224
        |    0     0     2    22    30     6   .07           |     214     658
igr  n/a|    0     0     0    -4   -36   -17  -.07    5    5 |   -2004    -116     20     81
        |    0     0     1    29    30    12   .03           |     837    1431
jpl  162|    0    -1     1    83  -274    33   .41   15   14 |    4318      -5     19     80
        |    0     1     1    24    29    44   .03           |     727    1570
mit  262|    0     0    -4    55   -77   -44  -.47   13   11 |      47    -266     21    163
        |    0     0     0    39    25    13   .03           |     217     574
ngs  217|    0     0    -3   -13    73   -16  -.34   11    8 |      71   -1021   2088   3708
        |    0     0     2    54    44    14   .05           |     583     684
sio  247|    0     0     6  -105    84    36  -.23   19   17 |     ---     ---    ---    ---
        |    2     0     1    29    32     5   .03           |     ---     ---


Table 1.1671.b   GPS week : 1671   MJD: 55941.000-55947.000   

         Satellite position sigmas for the combined orbits
         (coded in the IGS SP3 orbit files).
         "E" flags eclipsing satellites.
         Units: mm.

              Day of GPS week
 PRN  |    0    1    2    3    4    5    6 |  Remarks
------+------------------------------------+------------------------------------------
   1  |    4    4    4    5    4    5    4 |
   2  |    5    5    5    5    5    5    5 |
   3  |    5    5    5    6    6    6    6 |
   4  |    3    3    3    4    4    3    4 |
   5  |    4    5    5    4    4    5    4 |
   6  |    6    5    6    6    6    6    6 |
   7  |    4    4    4    4    4    5    5 |
   8  |    4    3    4    3    3    4    5 |
   9  |    4    4    4    4    4    4    4 |
  10  |    4    3    4    4    3    4    4 |
  11  |    4    4    4    5    5    5    4 |
  12  |    5    4    5    6    5    5    5 |
  13  |    4    4    3    4    4    4    4 |
  14  |    4    4    4    5    4    4    4 |
  15  |    4    5    5    5    5    5    5 |
  16  |    4    5    5    5    5    5    5 |
  17  |    4    5    6    5    5    5    5 |
  18  |    5    5    5    5    5    5    5 |
  19  |    4    4    4    5    5    5    5 |
  20  |    4    4    4    5    5    5    4 |
  21  |    5    4    5    5    5    5    5 |
  22  |    4    4    5    5    4    4    4 |
  23  |    4    4    4    4    4    5    5 |
  25  |    4    4    4    5    4    4    4 |
  26  |    8    8    8    7    6    6    6 |
  27  |    4    5    4    5    5    4    4 |
  28  |    4    5    5    5    5    4    5 |
  29  |    5    5    5    5    5    5    5 |
  30  |    5    4    5    4    4    4    5 |
  31  |    4    4    4    4    4    4    4 |
  32  |    4    4    4    5    4    4    4 |



Table 2: Daily transformation of each centre to the combined IGS orbit and
         clocks for each day of the week. The transformation displayed is the
         sum of a priori and estimated transformations.
         WRMS - RMS weighted by the centres SP3 header accuracy codes.
         STA  - Number of stations in the daily solutions.
   
Table 2.1671.0   GPS week: 1671   Day: 0   MJD: 55941.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0     0     7    35     0   -14  -.36    9    8 |     876   -1846     21     71
        |                     22    -9                       |
emr  100|   -1     3    13   -24   -46   -38   .30   18   18 |    2963    2844     18    103
        |                     -9   -53                       |
esa  129|    0     0     0  -118   206    32   .09    7    7 |     850     517     16    123
        |                     33    26                       |
gfz  193|    0     0    -6   151  -156     1   .49   12   12 |       7     119     30     99
        |                    -73    24                       |
grg  122|    3    -1    -8    35  -106   -29   .56   14   12 |    -280    1374     51    223
        |                     28   -47                       |
igr  n/a|    0     0    -1   -38   -26   -32  -.04    5    5 |   -1810    2584     18     64
        |                    -53    16                       |
jpl  162|    0     0     0    65  -258    82   .41   14   14 |    4099    2937     17     89
        |                    -40   145                       |
mit  262|    0    -1    -5   108   -78   -54  -.48   13   11 |    -255     881     25    178
        |                    -47    17                       |
ngs  217|   -1     0     0   -84   127   -23  -.39   11    8 |     865   -1810   2180   3670
        |                     -7   -50                       |
sio  247|   -2     0     4   -92    47    37  -.22   19   16 |     ---     ---    ---    ---
        |                     99     5                       |

Table 2.1671.1   GPS week: 1671   Day: 1   MJD: 55942.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    1     0     6    54   -15   -41  -.36    9    8 |     498   -1562     22     74
        |                     -3    -3                       |
emr  100|   -1     1    15    11   -80   -52   .33   19   19 |    4420    -988     14     88
        |                    -40    -6                       |
esa  129|    1     1     2  -110   245    44   .09    7    7 |   -1234     296     14    151
        |                     15    -3                       |
gfz  193|   -1     0    -5    55  -175     1   .49   10   10 |     -33     481     29    120
        |                    -29    47                       |
grg  122|    2    -1    -9    22  -102   -24   .60   16   14 |     318    -440     45    238
        |                     42   -34                       |
igr  n/a|    0     0    -2    -7   -34   -12  -.06    4    4 |    -603   -1163     21    104
        |                     -3    45                       |
jpl  162|   -1    -1     0   100  -286    76   .39   15   14 |    5638   -1152     19     87
        |                    -26   213                       |
mit  262|    0     0    -3    37   -59   -59  -.47   12   10 |     -69    -167     17    171
        |                    -16    20                       |
ngs  217|    0     0    -6    -9   116   -11  -.41   11    9 |     473   -1627   2019   3861
        |                    -81   -96                       |
sio  247|   -3     1     6  -129    59    33  -.17   18   18 |     ---     ---    ---    ---
        |                     90    19                       |

Table 2.1671.2   GPS week: 1671   Day: 2   MJD: 55943.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0     0     8    65     1     6  -.36   10    9 |     632   -1698     23     70
        |                      1   -29                       |
emr  100|   -1     1    16    15   -83   -44   .34   20   20 |    3689    -376     20     92
        |                    -24    -1                       |
esa  129|    1     1     0  -123   221    53   .11    8    8 |    3008   -2918     17    139
        |                     16     0                       |
gfz  193|   -1    -1    -5   -26   -89    -8   .48   12   11 |     277    -161     29    121
        |                    -13     3                       |
grg  122|    2    -1    -8    31   -83   -30   .56   16   14 |     304     -57     58    223
        |                     28   -38                       |
igr  n/a|    0     0    -1     8   -36    -6  -.06    4    4 |   -1505    -687     19     83
        |                    -12    47                       |
jpl  162|    0    -1     1    74  -276    23   .45   14   14 |    4917    -695     22     86
        |                     16   141                       |
mit  262|    0     0    -5    60   -84   -59  -.51   13   11 |     454    -715     22    180
        |                    -23    15                       |
ngs  217|    0     0    -3    36    79   -19  -.38   11    8 |     621   -1500   2166   3866
        |                   -107    38                       |
sio  247|   -2    -1     5  -107    54    29  -.24   19   18 |     ---     ---    ---    ---
        |                     87    -4                       |

Table 2.1671.3   GPS week: 1671   Day: 3   MJD: 55944.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0     1     5    36     3   -50  -.38   10    9 |      16   -1106     26     82
        |                     38    -6                       |
emr  100|   -1     1    15   -17  -123   -22   .34   18   18 |    2946    1323     18     99
        |                     -2    47                       |
esa  129|    1     0     0  -113   217    63   .12    9    9 |   -1079     188     16    134
        |                     17    25                       |
gfz  193|   -1    -2    -5    33   -35    -7   .51   14   12 |     186       9     31    111
        |                      2    19                       |
grg  122|    2     0    -8    27  -107   -38   .56   16   14 |     145    -172     48    208
        |                     33   -10                       |
igr  n/a|    0     0     0   -15   -43    -7  -.06    5    5 |   -2424    1078     21     85
        |                     -4    51                       |
jpl  162|    0     0     1    77  -260   -18   .39   14   14 |    3765    1280     20     89
        |                     19    54                       |
mit  262|    0    -1    -5    65   -50   -39  -.48   13   11 |      -5    -111     17    141
        |                    -17    10                       |
ngs  217|   -1     0    -3    -6    42    13  -.29   11    8 |     -17    -986   2022   3744
        |                   -136    20                       |
sio  247|   -1     0     5  -111   110    47  -.23   18   17 |     ---     ---    ---    ---
        |                     80   -36                       |

Table 2.1671.4   GPS week: 1671   Day: 4   MJD: 55945.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0     0     5    36   -10   -15  -.35    9    8 |    -544   -1126     26     82
        |                      4     3                       |
emr  100|   -2     0    17   -36  -100   -49   .36   20   20 |    3701    -388     22    101
        |                    -18    19                       |
esa  129|    0     0    -2  -150   190    55   .13    8    8 |    -128     288     15    127
        |                     44    31                       |
gfz  193|    0     0    -8   179   -35   -18   .51   12   11 |     167    -370     33    107
        |                     -2    14                       |
grg  122|    1    -2    -1    34  -100   -22   .63   15   13 |      12      90     68    233
        |                     36    -2                       |
igr  n/a|    0     0     0   -33   -45   -18  -.10    6    6 |   -1814    -434     20     81
        |                     -8    30                       |
jpl  162|    0     1     2    69  -273    52   .40   15   15 |    4318    -166     18     71
        |                      0    91                       |
mit  262|    1     0    -5    61   -59   -28  -.47   12   12 |     118    -666     19    158
        |                    -26    12                       |
ngs  217|    0     0    -4   -52    52   -35  -.34   10    8 |    -590    -949   2284   3711
        |                     -3    35                       |
sio  247|    1     1     6   -98   124    39  -.24   18   17 |     ---     ---    ---    ---
        |                     42   -39                       |

Table 2.1671.5   GPS week: 1671   Day: 5   MJD: 55946.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0     0     7    39    22   -17  -.38   10    9 |    -459    -172     21     73
        |                     12   -23                       |
emr  100|   -1     0    15   -45   -36   -17   .26   19   19 |    2572    -863     18    103
        |                    -23    -8                       |
esa  129|    0     1    -2  -132   199    72   .09    8    8 |   -1089   -1412     16    128
        |                     16    31                       |
gfz  193|   -1    -2    -8   139  -183   -32   .52   15   16 |    -214    -422     34     96
        |                     31     9                       |
grg  122|    1     0    -5    34   -71   -21   .69   14   13 |     -30    -595     57    236
        |                     37   -67                       |
igr  n/a|    0     0     0     3    16    -8  -.13    6    6 |   -2868    -835     19     77
        |                    -52    22                       |
jpl  162|   -2    -3    -1    67  -238   -33   .36   14   14 |    3564    -813     15     63
        |                     12   163                       |
mit  262|    2     0    -6    75  -125   -33  -.45   13   13 |      95    -781     21    151
        |                    -14    46                       |
ngs  217|    0     0    -2   -49    95   -14  -.29   11    9 |    -373    -263   1968   3268
        |                    -58   -42                       |
sio  247|    4     0     6   -52    73    33  -.26   19   18 |     ---     ---    ---    ---
        |                     37   -28                       |

Table 2.1671.6   GPS week: 1671   Day: 6   MJD: 55947.000                            

CENT STA|   DX    DY    DZ    RX    RY    RZ   SCL  RMS  WRMS|    TOFT   TDRFT   SDEV    RMS
        |  [mm]  [mm]  [mm] [uas] [uas] [uas] [ppb] [mm] [mm]|    [ps]  [ps/d]   [ps]   [ps]
--------+----------------------------------------------------+------------------------------
cod  251|    0    -1     9   101   -40     2  -.36   11   10 |     -92   -1960   2082   2205
        |                    -42    12                       |
emr  100|   -1    -1    15     1   -68   -56   .35   21   21 |    2598   -1356     19     96
        |                    -17   -44                       |
esa  129|    0     0    -3   -90   143    63   .17    7    6 |     -41     573     20    133
        |                     42    21                       |
gfz  193|   -1    -2    -5    22   -74   -44   .53   13   13 |    -171     226     36     94
        |                      0    53                       |
grg  122|    1     0    -4    89  -167   -36   .74   14   13 |     -68    -364     66    208
        |                     -9   -27                       |
igr  n/a|   -1     0     1    48   -86   -35  -.05    5    5 |   -3004   -1359     23     79
        |                      9    72                       |
jpl  162|    0    -3     4   133  -330    50   .42   18   18 |    3930   -1430     23     79
        |                     10   163                       |
mit  262|    0     0    -3   -19   -81   -34  -.42   11   10 |      -4    -307     28    167
        |                     12    18                       |
ngs  217|    0     0    -1    72     1   -21  -.29   11    8 |    -482     -14   1982   3837
        |                    -73   102                       |
sio  247|    2     0     9  -146   118    35  -.23   20   18 |     ---     ---    ---    ---
        |                     55   -70                       |

       
       
Table 3: Daily fit for each satellite and each centre resulting from weighted
         average combination and from long arc orbit dynamics (7-day). The
         first IGS column gives resulting satellite accuracy measures found in
         SP3 header. The last IGS column gives the RMS fit of the IGS orbit
         when processed through the 7-day arc evaluation.

         "E"    stands for eclipsing satellites (earth).
         "M"    stands for eclipsing satellites (moon).
         "X"    stands for excluded from the statistics but included in IGS orbit.
         "T"    stands for Total long arc orbit RMS for all satellites.
         "NE"   stands for long arc orbit RMS for Non-Eclipsing satellites only.
         "MEDI" stands for median of the centre's satellite RMS.
         "MD"
         Units: mm.

Table 3.1671.0   GPS week: 1671   Day: 0   MJD: 55941.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   10   14    6   15    9    4   15   13   11   13    4 |    53   52   61   63   64   60   63   64   62   54    59
   2  |    8   16    5   14   10    3   12   10   11   31    4 |    17   25   24   35   22   22   26   22   24   25    21
   3E |   12   12    7   10   18    4   19   12   13   21    4 |    45   42   42   39   35   41   41   48   47   46    41
   4  |    8    8    4   11    9    3    7    9    9   15    3 |    29   31   36   42   40   37   37   40   39   39    36
   5  |    8   16    7    9    9    5   16   12    8   28    4 |    23   34   27   29   32   26   37   23   22   29    25
   6E |   20   17   10   18   19    9   21   13   15   17    6 |   148  144  144  144  143  141  146  147  143  139   144
   7  |    5   21    7   10   15    2   14    7    9   18    4 |    10   26   18   19   22   15   20   12   15   21    14
   8  |    8   13    9   11   16    5   10   12    9   19    4 |    19   23   19   24   27   18   25   22   20   16    18
   9  |    7   14    5    9   12    5   10   13    6   15    3 |    22   29   21   30   23   24   29   23   21   22    21
  10  |    9   12    5    9   10    5    8    8    9   20    3 |    16   21   24   27   27   24   22   25   27   22    22
  11  |    7   18    4   12   13    4   13   14    8   18    4 |    28   36   37   40   47   35   42   40   36   36    35
  12  |    6   26    6   12   16    5   17   12   10   15    4 |    25   37   27   31   34   30   36   24   28   20    26
  13E |    5   17    8   11   12    4    9   12    8   17    3 |    17   31   21   24   24   19   26   17   19   26    19
  14E |    8   17    5   10   11    3   12   10    5   14    3 |    22   31   24   27   21   25   27   26   26   23    23
  15E |    8   19    5   13   13    5   22    8   13   12    4 |    34   40   36   32   31   34   38   37   35   36    34
  16  |    6   23    7   10   15    5   14   13    9   19    4 |    26   36   28   28   32   30   35   26   35   29    28
  17  |    7   16    8   11   17    2   16   11   12   12    4 |    23   28   25   34   36   24   30   35   26   33    27
  18  |    9   18    7   18   10    4   14   10    9   23    4 |    26   33   26   38   27   26   30   25   24   28    24
  19  |    8   28    6   12   15    3   11    6    9   17    4 |    27   41   35   41   46   33   36   28   34   28    33
  20  |    7   17    8   12    8    4   12   12    8   24    4 |    27   35   30   29   31   26   35   30   26   32    28
  21  |    8   21    8    9    7    6   15   11   10   29    4 |    27   26   28   25   25   27   25   29   28   32    25
  22  |    7   15    7   11   10    5   11   13    8   19    3 |    22   30   25   27   26   24   31   28   24   29    24
  23E |    6   19    8   11   16    6   14   12   10   12    4 |    29   38   29   29   31   28   33   28   31   31    28
  25  |   12   15    8   11   15    6   12    9   12   16    4 |    33   33   32   29   33   34   36   31   35   29    30
  26E |   18   19   11   13   19    9   20   37   22   24    7 |    55   64   62   64   72   61   69   74   65   74    63
 X27  |    7   15    6   10   13    8  ---   12    9  ---    4 |    22   27   21   31   23   22  ---   21   21  ---    21
  28  |    7   19    6    8   19    3   11   12   10   14    4 |    36   39   35   33   31   35   37   38   38   35    34
  29  |    9   27   11   12   12    5   22   15    9   21    5 |    25   32   30   33   35   29   36   35   30   32    28
  30  |    8   15    7   14   14    5   10   16   15   19    4 |    11   21   18   19   17   16   19   16   19   20    14
  31  |    5   20    9   12   18    7   11   11    7   16    4 |    13   25   18   21   31   16   22   15   17   16    15
  32  |    7   17    6   10   10    5   14   13    8   14    3 |    13   17   20   21   23   15   23   16   14   14    15
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18    7   12   14    5   14   13   11   19      |T   29   36   33   35   35   32   37   33   33   33    31
 WRMS |    8   18    7   12   12    5   14   11    8   16      |NE  23   30   27   30   30   26   31   27   27   27    25
 MEDI |    8   17    7   11   13    5   13   12    9   17      |MD  25   32   27   30   31   26   33   28   27   29    26

Table 3.1671.1   GPS week: 1671   Day: 1   MJD: 55942.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   12    6    9   11    3   16   13   11   13    3 |    36   37   37   39   46   41   45   44   43   37    39
   2  |   10   20    5   15   11    4   16    9    7   30    4 |    13   25   17   33   21   16   24   17   16   20    16
   3E |   15   15    7   10   21    4   18    9   10   21    4 |    41   40   41   32   32   40   39   42   45   39    38
   4  |    9   11    5   10   15    5    9    7    9   16    3 |    26   24   25   35   36   26   28   29   30   31    27
   5  |    9   16    6   12   13    5   15   13   12   25    4 |    19   28   21   28   29   19   31   18   19   26    19
   6E |   16   16    8   12   20    5   18   12   14   26    5 |   122  121  125  121  120  124  123  125  129  122   123
   7  |    5   23    6    8   18    3   14    5    9   14    3 |    10   26   16   17   25   11   21    9   11   14    12
   8  |    7   13    4    9   16    4    9   11    9   10    3 |    22   27   25   26   27   22   29   24   23   27    24
   9  |    9   14    5   10   11    5   11    8   11   15    3 |    26   29   24   25   27   24   27   25   25   27    24
  10  |    8   11    6   10   13    5    7    7    8   18    3 |    17   18   16   22   23   18   20   19   22   19    16
  11  |    7   16    4    8   14    4   15   12   12   15    3 |    20   31   26   30   42   26   35   29   28   26    26
  12  |    9   24    7   10   16    5   18    8   11   14    4 |    21   37   23   28   30   25   32   22   27   21    22
  13E |    6   19    8   11    9    5   10   10   11   14    3 |    16   26   15   23   24   16   22   21   19   21    16
 X14E |    7   18    8    9  ---    4   12    8   10   12    3 |    23   29   24   22  ---   20   26   21   23   22    22
  15E |    8   25    7   14   20    4   19   12   13   10    4 |    17   27   19   24   22   17   23   18   18   19    16
  16  |    7   24    8   11   13    5   19   11   14   20    4 |    17   30   24   21   30   20   29   20   22   21    20
  17  |    5   23    8   10   20    3   22   14   13   14    4 |    30   35   32   36   40   31   40   32   32   35    32
  18  |    9   23   10   15   13    2   15    7   11   23    4 |    17   30   17   32   21   17   25   17   19   20    17
  19  |    5   24    6    9   20    6   13    7   12   15    4 |    24   31   34   35   43   30   33   28   29   28    30
  20  |    6   16    8    9   10    6   13   11   13   23    4 |    18   27   23   20   25   21   29   22   22   26    21
  21  |    7   21    7    6   11    4   14   10    8   28    4 |    20   20   18   14   19   18   19   22   22   27    16
  22  |    8   20    9    8   12    4   13   10    8   20    4 |    14   25   17   21   21   13   25   15   13   19    13
  23E |    7   21    9   11   16    5   14    8    9   12    4 |    20   28   19   25   22   17   25   18   18   17    18
  25  |    9   14    5    7   17    6   15    8   12   17    3 |    29   31   27   28   31   27   34   24   30   24    25
  26E |   22   19    9   15   20    7   17   39   19   20    7 |    46   56   51   58   60   49   61   55   51   63    51
 X27  |   11   19    7   12   12    6  ---    9   12  ---    4 |    17   26   20   20   22   19  ---   21   22  ---    19
  28  |    7   25    6   14   26    4   12   12   10   15    4 |    37   44   35   36   32   37   36   37   42   34    34
  29  |   12   28    7   10   10    4   19   10    8   19    4 |    16   27   17   22   24   18   25   20   20   21    16
  30  |    9   16    8    8   12    3   12   12   12   13    3 |    11   25   22   17   17   15   18   17   17   17    15
  31  |    5   16    7    9   18    4   15    9   11   15    3 |    16   24   19   22   31   18   28   18   20   19    18
  32  |    8   19    7    5   12    4   16   13    8   17    4 |    10   16   16   20   22   14   24   13   13   17    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   19    7   10   16    4   15   12   11   18      |T   24   32   27   30   32   26   32   27   28   28    25
 WRMS |    8   19    7   10   14    4   14   10    9   18      |NE  19   27   22   25   27   21   27   22   23   23    20
 MEDI |    8   19    7   10   13    4   15   10   11   15      |MD  20   28   23   25   27   20   28   21   22   22    20

Table 3.1671.2   GPS week: 1671   Day: 2   MJD: 55943.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   10   11    7   11   12    3   15   12   16   14    4 |    44   44   47   48   54   46   53   52   51   46    47
   2  |    9   20    6   14   11    4   13    9    8   29    4 |    16   24   20   32   20   17   22   22   17   23    17
   3E |   14   15    9   14   21    4   16   11   14   18    5 |    45   39   38   34   32   37   37   42   43   36    37
   4  |    9   10    4   12   11    5    8    8    8   15    3 |    24   25   29   37   36   30   29   32   30   31    29
   5  |    8   16   10   21   10    4   14   16    8   18    4 |    20   29   21   34   28   19   30   23   20   23    20
   6E |   15   20    9   12   22    4   17   15   14   30    5 |    81   74   80   80   73   78   74   78   82   77    77
   7  |    7   24    5   10   17    4   14    7    5   14    3 |    11   27   14   20   26   11   20    9   11   12    11
   8  |    8   15    6    9   16    4    8   13    8    8    3 |    17   25   18   21   22   17   22   21   20   18    17
   9  |    7   16    6   10   13    4    9    9    9   12    3 |    21   25   19   25   24   19   25   23   18   20    19
  10  |   11   12    3   10   13    3    9    9    8   18    3 |    14   19   17   19   23   17   20   23   20   18    16
  11  |    9   16    6    8   16    4   12   12   12   16    4 |    24   34   30   33   43   28   38   35   30   31    30
  12  |   10   29    8   12   20    5   21   14    9   15    5 |    21   35   20   31   33   22   34   22   22   20    21
  13E |    7   16    6    9   12    4    9    8    8   14    3 |    15   24   15   20   25   15   22   18   15   21    15
  14E |    9   19   11    7   13    3    8    9    8   13    3 |    15   27   18   21   22   15   19   19   17   20    16
  15E |    8   25    9   14   19    4   20    9    8   10    4 |    28   38   30   25   30   26   33   28   26   30    27
  16  |    9   25    7   13   17    4   17   14   12   19    4 |    24   35   25   22   29   25   33   22   29   25    24
  17E |   15   17    9   13   19    5   21   19   12   26    5 |    35   42   42   45   45   39   43   42   41   39    38
  18  |   11   23    9   18   12    3   13   12   12   21    5 |    21   33   22   36   26   20   27   22   23   24    21
  19  |    8   24    8    9   21    5   12    8    9   16    4 |    26   36   29   34   44   29   34   27   28   24    29
  20  |    9   15    6    7    9    5   12   15    9   26    4 |    23   31   24   24   26   22   32   26   21   29    23
  21  |    9   20    8   10   11    4   14    8   10   29    4 |    23   20   23   20   21   21   21   24   23   28    19
  22  |    9   20    9   11   12    7   13   14   15   18    4 |    19   27   20   25   27   18   27   22   23   27    19
  23E |    8   21    8    8   13    4   12    7   11   15    3 |    23   35   22   23   26   22   28   24   26   22    22
  25  |    9   14    7   11   16    4   13   10    7   16    3 |    27   30   31   31   32   27   35   25   25   24    26
  26E |   20   23    9   17   24    5   19   36   19   21    7 |    47   55   51   57   62   49   63   48   50   61    51
 X27  |   10   18    6   11   12    7  ---   10   10  ---    4 |    17   25   19   23   22   18  ---   20   19  ---    17
  28  |    8   24    8   11   23    5   13   12   14   17    4 |    47   55   48   49   52   48   50   55   48   53    48
  29  |   15   24   10   13   14    6   19   10    8   17    5 |    51   57   59   63   60   58   60   61   55   61    57
 X30  |   10   17    7   10   16    5  ---   17   16  ---    5 |    15   24   19   15   16   14  ---   17   22  ---    15
  31  |    8   15    9    8   17    4   13   11   16   13    4 |    12   22   14   19   30   15   24   16   17   17    14
  32  |   11   20    7    4   10    4   14   13    6   24    4 |    16   22   17   21   23   16   23   19   13   26    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   20    8   12   16    4   14   13   11   19      |T   26   33   28   31   33   27   33   29   28   30    27
 WRMS |    9   20    8   11   14    4   14   11    8   18      |NE  21   29   23   27   29   22   29   25   23   26    22
 MEDI |    9   19    8   11   14    4   13   11    9   17      |MD  23   30   22   25   28   22   30   23   23   25    21

Table 3.1671.3   GPS week: 1671   Day: 3   MJD: 55944.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    9   14    9   20   11    4   16   16   16   17    5 |    44   43   46   54   54   47   53   54   50   47    46
   2  |    9   19    9   14   10    4   15    8   10   28    4 |    21   29   23   32   29   22   27   25   23   27    23
   3E |   22   17   11   17   23    7   14   14   15   17    6 |    43   42   41   33   37   41   41   45   46   35    39
   4  |    9   10    7    9   15    6    8   10    7   13    3 |    32   33   33   36   45   35   36   39   41   37    36
   5  |   11   13    6   15   10    4   14   10   15   17    4 |    22   31   23   31   30   22   34   22   19   25    23
   6E |   17   18   10   13   20    6   16   20   13   31    6 |   136  132  135  130  134  133  132  135  132  129   133
   7  |    7   21    5   13   18    5   16    9    7   12    4 |    11   27   16   22   29   14   25   13   14   16    14
   8  |    7   12    8   10   15    3   11    8    6    8    3 |    18   25   17   20   26   16   31   18   16   16    17
   9  |    7   17   10   12    9    5   10    9   12   15    4 |    18   29   21   27   23   18   28   17   21   17    18
  10  |   12   10    6    6   15    3    9    8    8   23    3 |    19   20   14   22   28   17   24   22   24   20    18
  11  |   10   20    8   16   17    5   16   13   11   14    4 |    26   34   28   37   43   31   40   36   34   32    30
  12  |   12   25    9   14   20    5   21   14   11   16    5 |    27   40   25   29   32   25   37   26   28   22    26
  13E |    5   15    7    8   19    4   10    8    9   13    3 |    21   32   20   23   34   19   28   21   22   24    21
  14E |   10   20   12   13   11    4    9   11   13   16    4 |    20   32   26   24   24   21   26   21   24   21    21
  15E |    8   26    9   15   16    5   20   13   12   12    5 |    36   47   35   37   39   35   42   40   38   39    35
  16  |    8   21   11   12   15    5   19   13   10   16    4 |    26   34   27   26   33   23   35   24   28   25    25
  17E |    8   17    8   11   18    5   19   12    8   17    4 |    24   24   19   23   29   20   27   26   22   25    21
  18  |    7   19    9   21   10    5   13   11    8   23    4 |    23   32   22   39   28   24   30   25   24   25    23
  19  |    8   26    8   16   23    8   15   10   14   15    5 |    22   34   30   38   45   29   31   28   34   23    28
  20  |    8   14    8   17   13    6   13   17   10   25    4 |    30   37   30   30   31   29   38   30   27   34    29
  21  |    9   20   12   10    9    4   13    9   11   28    4 |    26   23   25   23   26   22   23   27   24   29    22
  22  |    9   19   14   10   11    7   12   12   14   18    4 |    21   30   26   25   27   22   29   25   23   27    22
  23E |    6   21    8   14   14    6   14    8   12   13    4 |    28   42   29   27   35   27   36   28   33   29    29
  25  |    9   14   10   11   16    7   14   14   11   18    4 |    35   36   35   33   34   33   39   33   35   29    32
  26E |   19   18    8   17   20    6   21   28   13   19    6 |    54   64   56   57   70   55   66   53   53   63    57
 X27  |   10   19    8   13   11    5   10   16    9  ---    4 |    16   31   19   27   24   18   22   19   18  ---    18
  28  |   10   18    7   17   21    5   14   11    8   15    4 |    88   91   87   86   94   89   92   89   85   88    87
  29E |    9   24   13   13   13    6   17   12   13   16    5 |    26   39   30   29   31   27   32   28   31   27    27
  30  |    9   17    5    8   14    4   10   12    9   13    3 |    13   30   16   19   20   13   23   16   17   15    15
  31  |    8   16    9   12   16    6   12   10   13   12    4 |    13   22   17   25   31   14   21   15   19   14    15
  32  |    9   19    6   10   12    5   12   14   10   24    4 |    14   21   16   20   22   13   21   18   16   23    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   18    9   14   16    5   14   13   11   18      |T   30   38   31   34   38   30   37   32   32   32    31
 WRMS |    9   18    9   12   14    5   14   11    8   17      |NE  25   33   26   31   33   26   33   28   27   28    26
 MEDI |    9   18    8   13   15    5   14   12   11   16      |MD  24   32   26   29   31   23   31   26   24   25    23

Table 3.1671.4   GPS week: 1671   Day: 4   MJD: 55945.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |    8   13    7   13   10    6   18   14   10   15    4 |    38   39   39   47   46   39   49   46   43   40    41
   2  |    9   19    6   11   10    4   17    9    7   28    4 |    16   25   20   26   21   20   23   21   19   22    18
   3E |   19   19   10   11   22    4   16   15   13   24    5 |    37   38   33   27   23   33   34   38   36   31    30
   4  |   11   11    4   10   11    5    9   10    9   18    3 |    34   36   38   43   35   40   38   40   43   41    37
   5  |   10   15    8   11   12    8   16   11   10   20    4 |    22   34   24   29   33   24   34   21   25   24    23
   6E |   20   15   10   13   24    6   18   20   13   30    6 |    53   58   61   57   51   58   59   65   57   60    56
   7  |    6   19    8   12   13    5   19   15    6   11    4 |    14   27   16   23   24   14   25   17   11   18    13
   8  |    7   13    7   10   14    5   10    8    7   10    3 |    16   27   15   24   20   17   25   17   15   19    16
   9  |    6   16    8   10   10    5    9    8   12   16    3 |    20   27   20   27   23   21   27   21   24   19    20
  10  |    8   12    4    8   11    5    9    8   10   17    3 |    15   21   19   22   19   19   21   22   23   24    18
  11  |    8   19   15   11   15    8   18   13   11   13    4 |    21   35   39   36   41   27   38   32   30   27    29
  12  |    9   29    9   14   13    5   18   13    8   16    4 |    26   38   23   28   31   24   32   26   25   22    24
  13E |    7   18    6   11   13    4   11    9   14    9    3 |    21   30   20   26   30   20   27   21   18   22    20
  14E |    9   23    7   14   14    6    9    6    9   11    4 |    20   34   21   25   22   21   24   21   23   19    20
  15E |    9   22    7   13   15    6   20   10    8   24    4 |    31   39   30   30   36   32   34   28   29   35    29
  16  |    7   28   10   10   14    4   18   17   13   16    5 |    24   36   27   26   28   26   35   21   28   22    23
  17E |    6   22    9   11   20    5   21   12    8   13    4 |    21   30   22   22   25   22   28   24   21   22    20
  18  |    9   23    7   22   10    6   15    8   12   23    5 |    20   32   23   41   25   23   30   22   24   23    22
  19  |    7   25    7   11   20    9   15   13   11   11    4 |    40   50   46   49   52   46   45   43   41   42    43
  20  |    6   16    8   11    9    4   14   16    9   29    4 |    23   36   27   28   29   25   35   23   26   29    25
  21  |    8   22    8   11   12    6   16    9   11   26    4 |    27   24   24   21   24   25   22   27   25   30    22
  22  |    8   17    7   12   12    7   15   11   11   16    4 |    18   29   22   23   24   19   29   24   19   25    19
  23E |    7   24    8   13   17    4   14   11    9   11    4 |    31   41   29   29   34   29   35   32   31   31    29
  25  |    7   18    7   11   12    6   13   12    9   12    3 |    31   32   29   30   31   32   35   33   34   29    29
  26E |   17   21    8   13   20    8   19   18   12   20    5 |    47   59   51   57   63   49   62   44   52   59    52
 X27  |    8   17    8    7   13    5  ---   12   11  ---    4 |    16   25   17   20   21   19  ---   21   20  ---    17
  28  |    8   24   10   13   20    6   14   12    8   14    4 |    99   98   96   96   83   97   99  102   99  100    96
  29E |    8   25   13   13   12    4   17   12   14   16    5 |    28   33   29   28   27   29   30   30   31   30    27
  30  |    9   15    7    8   17    4   11   15    8    9    3 |    16   25   21   20   19   18   22   17   17   13    16
  31  |    5   17    8   10   15    5   15   11   13   13    4 |    12   26   17   22   30   17   23   16   19   14    15
  32  |    6   20    9    8   11    6   14   10    8   23    4 |    10   22   18   23   22   15   22   13   14   17    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   20    8   12   15    6   15   12   10   18      |T   27   35   29   32   32   29   34   29   29   30    27
 WRMS |    8   20    8   11   13    6   15   12    8   17      |NE  24   33   27   31   29   26   33   27   27   27    25
 MEDI |    8   19    8   11   13    5   15   12   10   16      |MD  22   33   24   27   28   24   30   24   25   24    23

Table 3.1671.5   GPS week: 1671   Day: 5   MJD: 55946.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   17   16   10   18   12    7   17   17   11   16    5 |    33   34   32   36   41   34   40   34   37   28    32
   2  |    8   22    5   16   13    5   13   12   13   28    4 |    19   28   22   29   20   23   25   20   27   25    20
   3E |   15   17    7   13   23    7   16   14   15   33    6 |    47   50   47   41   41   47   41   48   56   42    45
   4  |   10   11    5   11   12    6    7    9    8   14    3 |    26   27   29   28   27   29   31   28   33   29    28
   5  |   11   14    6   28   11    8   15   10    9   26    5 |    23   31   24   37   28   26   32   21   29   31    24
   6E |   21   15    9   18   23    9   18   16   14   27    6 |   139  136  137  134  134  136  130  138  139  132   136
   7  |    5   22    7   13   13    5   13   18   10   12    4 |    13   28   19   22   24   18   23   20   18   19    16
   8  |    8   12    5   11   15    7   12   14   12   11    3 |    11   20   14   22   12   14   20   16   15   14    12
   9  |   10   15    7   14   12    4   11    9   11   15    4 |    16   25   17   23   16   16   22   12   17   13    15
  10  |    8   10    7   10   11    5    9   13    8   21    3 |    15   21   20   21   18   20   23   21   24   23    18
  11  |    9   25    9   14   16    8   14   14    9   10    4 |    19   34   26   29   40   24   33   28   29   22    25
  12  |    9   21    9   14   13    5   18   10    9   18    4 |    21   28   21   30   27   22   29   20   28   21    21
  13E |    6   18   11   11   12    3    9   15   11    8    4 |    20   29   26   26   29   22   23   18   27   22    21
  14E |    9   19    8   14   13    5    8    9   14    8    4 |    23   31   24   25   21   26   24   18   28   20    22
  15  |   12   21    7   17   15    6   15    9   13   13    4 |    46   51   47   54   52   46   49   47   48   50    47
  16  |    7   25    9   14   13    5   20   22    7   18    5 |    23   33   27   24   25   26   34   22   28   23    23
  17E |    6   20    8   11   18    6   18   14   13   13    4 |    18   27   20   19   21   21   23   27   25   22    19
  18  |    9   22    5   21   11    4   14    8   16   22    4 |    21   36   27   37   22   27   31   21   29   24    23
  19E |    8   26   12   16   13    8   13   14   12   20    5 |    32   41   46   44   44   36   40   40   39   29    38
  20  |    7   18    8   18    7    6   15   13   10   27    4 |    25   34   26   29   32   25   34   23   28   30    26
  21  |    8   18    7   15   10    4   14    9   13   28    4 |    21   23   24   22   18   23   23   26   27   29    21
  22  |    9   18    9   15   14    6   12   14    9   17    4 |    22   31   29   26   24   26   30   25   25   27    24
  23E |    9   25   13   12   13    3   13   12   13   12    4 |    24   37   29   28   27   24   29   22   30   23    24
  25  |   10   20    8   15   11    5   14   12    9   14    4 |    28   32   28   32   28   27   31   27   31   25    25
  26E |   16   18    9   14   13    5   20   14   17   21    5 |    45   61   56   57   64   52   65   45   54   62    54
 X27  |    9   15    8   13   12    6   12    9   12  ---    4 |    13   24   18   22   16   16   21   15   17  ---    15
  28  |    6   18    8   15   14    8   12   14    7   13    4 |    89   89   87   88   87   89   90   90   88   89    88
  29E |    9   25   12   16   20    4   16   11   10   17    5 |    17   30   27   29   22   23   25   23   25   26    21
  30  |    7   14    7   14   16    6   10   15    8    9    4 |    15   24   22   24   16   21   26   19   20   17    17
  31  |    6   18    7   11   11    4   14   13   11   13    4 |    17   26   17   21   29   19   24   12   23   13    16
  32  |    8   16   10    9   12    4   15   11    7   20    4 |    16   21   21   21   23   19   25   18   22   17    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   19    8   15   14    6   14   13   11   19      |T   28   36   32   34   33   31   35   30   34   31    30
 WRMS |    9   19    8   16   13    6   14   13    9   18      |NE  23   30   26   29   27   25   30   24   28   25    24
 MEDI |    9   18    8   14   13    5   14   13   11   16      |MD  21   31   26   28   27   24   29   22   28   24    23

Table 3.1671.6   GPS week: 1671   Day: 6   MJD: 55947.000                            

        Weighted Average                                            Orbit Dynamics (7 days)
 PRN  |  cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio  IGS |   cod  emr  esa  gfz  grg  igr  jpl  mit  ngs  sio   IGS
------+--------------------------------------------------------+---------------------------------------------------------
   1  |   13   12    6   14   11    4   20   13   11   12    4 |    53   53   56   64   62   55   65   61   58   51    56
   2  |    9   24    5   16   11    4   18    6    8   30    4 |    25   33   29   32   32   25   28   29   25   31    26
   3E |   15   21   12   16   17    5   19   14   21   26    6 |    49   46   44   40   42   41   42   48   50   38    43
   4  |    8   13    5   14   16    4   10    7    7   14    3 |    39   35   41   47   48   41   40   46   42   42    41
   5  |   11   17    6   10   11    7   21    5    8   30    4 |    28   37   27   31   35   27   37   27   26   33    26
   6E |   23   20    8   15   18    8   24   10   18   30    6 |   148  137  138  138  136  135  135  144  140  130   140
   7  |    8   23   10    9   14    3   17   18    9   13    5 |    18   33   23   22   33   20   27   25   17   23    19
   8  |   12   15    6    9   14    4   10   16   14   16    4 |    20   29   22   23   26   22   28   24   23   24    20
   9  |   11   15    8   11   13    4   17    8    8   15    4 |    22   30   25   27   29   23   31   21   21   22    22
  10  |    9   16    5    8   16    4   10    8    7   28    4 |    21   27   28   27   34   24   30   30   26   29    25
  11  |   10   20    5    8   14    5   14    9    8    7    3 |    29   40   41   44   54   37   45   42   37   34    38
  12  |   10   29    8   13   15    6   21    9    9   20    4 |    29   42   29   35   37   31   39   29   28   29    28
  13E |    9   18    5   13   12    3   13    8   14   15    4 |    25   34   26   25   33   27   30   27   26   26    24
  14E |   11   20    6   14   12    4   11    7   11   13    4 |    20   30   22   27   25   22   26   21   24   21    20
  15  |   12   24    7   12   20    4   21   12   11   17    5 |    28   31   29   30   36   27   29   28   27   28    26
  16  |    8   31    6    7   12    7   22   18   10   19    5 |    29   42   31   33   38   30   41   28   25   27    28
  17E |   10   25    7   12   18    4   24   16   13   15    5 |    25   30   24   24   34   25   31   28   26   23    22
  18  |   10   19    5   22   12    4   17    6    9   24    4 |    29   33   27   43   32   28   33   26   28   27    26
  19E |   11   24    7   14   13    4   13   16   11   16    4 |    39   47   48   53   53   47   47   47   44   39    44
  20  |    7   16    7   11    7    5   16   10   10   27    4 |    34   42   38   36   39   36   42   32   35   38    35
  21  |    9   23    6   14   11    4   24    9   12   29    4 |    28   26   30   30   31   28   29   31   25   32    26
  22  |   10   19    6   14   10    5   15    7    7   20    4 |    26   29   25   29   34   25   32   25   23   27    24
  23E |   10   22    5   14   17    5   16   10   14   17    4 |    37   45   33   36   42   35   38   35   39   37    34
  25  |    7   13    6   12   15    5   22    8   11   13    3 |    37   40   40   42   40   39   42   37   38   37    36
  26E |   17   18    7   14   20    4   21    9   17   18    5 |    56   62   59   64   74   57   67   52   55   66    58
 X27  |   12   16    8    9   14    4   14    6    8  ---    4 |    19   30   24   23   28   22   20   21   20  ---    20
  28  |   10   19    9   15   12    3   14   13    8   16    4 |    77   82   77   80   81   77   84   73   70   73    74
  29E |   11   31    7   17   20    5   23    8   10   15    5 |    25   36   24   25   27   24   29   24   26   30    22
 X30  |    8   17    7   10   18    7  ---   11   11  ---    4 |    20   28   24   23   24   22  ---   21   18  ---    20
  31  |    8   22    6   11   13    5   16    9    8   17    4 |    18   31   21   25   33   20   29   18   22   19    19
  32  |    8   19    3    9    9    4   15    9    9   19    3 |    17   24   22   25   30   20   28   19   21   22    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   21    7   13   14    5   18   11   11   20      |T   34   40   36   38   42   35   40   36   35   36    34
 WRMS |   10   21    6   13   13    5   18   10    8   18      |NE  29   36   32   35   38   31   37   31   29   32    29
 MEDI |   10   19    6   13   14    4   17    9   10   17      |MD  28   34   29   31   34   27   32   28   26   30    26



Table 4: Precise Navigation Summary.

         Weekly station RMS w.r.t. the estimated coordinates for the Latitude,
         Longitude and Height components.  See Table 5 for the daily summary.

         CLK  - Satellite clocks used.
         EPO  - Mean number of satellite clock epochs available in the daily
                solutions.
         Units: mm.

Table 4.1671   GPS week: 1671   MJD: 55941.0-55947.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2975 |U    7     7    19 |U   10    11    29 |U   14    11    25 |
emr | emr 2964 |    10    12    26 |U   12    13    34 |    18    14    29 |
esa | esa 2976 |     8     9    21 |U   10    11    31 |    11    11    28 |
gfz | gfz 2963 |U    9    10    21 |U   14    21    74 |U   14    13    30 |
grg | grg 2962 |     9    11    23 |U   13    13    40 |    16    18    36 |
igr | igr 2975 |     8     8    19 |    10    11    30 |    12    11    25 |
igs | igs 2925 |     8     9    19 |    11    11    30 |    13    13    28 |
jpl | jpl 2879 |U   10    12    26 |U   11    13    34 |    22    16    38 |
mit | mit 2976 |U   16    13    32 |U   15    13    41 |U   20    16    31 |



Table 5: Daily Precise Navigation Summary using the corresponding Centre orbit 
         positions and satellite clock corrections at 15 min intervals.

         Each line gives the daily station RMS w.r.t. the estimated coordinates 
         for the Latitude, Longitude and Height components.
        
         CLK  - Satellite clocks used.
         EPO  - Number of satellite clock epochs available for that day.
         Units: mm.

Table 5.1671.0   GPS week: 1671   Day: 0   MJD: 55941.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     5     8    15 |    14    13    32 |    40    13    22 |
emr | emr 2964 |     7     8    17 |    15    14    37 |    41    12    24 |
esa | esa 2976 |     7     8    17 |    14    12    36 |    32     9    21 |
gfz | gfz 2962 |     5     8    16 |    19    27    94 |    29     6    16 |
grg | grg 2976 |     6     7    18 |    13    14    39 |    40    15    20 |
igr | igr 2976 |     6     8    17 |    13    12    31 |    35    10    21 |
igs | igs 2930 |     5     7    14 |    15    12    35 |    37    12    18 |
jpl | jpl 2868 |    10    11    35 |    14    13    33 |    36    16    25 |
mit | mit 2976 |    13    18    42 |    24    21    49 |    56    14    29 |

Table 5.1671.1   GPS week: 1671   Day: 1   MJD: 55942.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     5     6    22 |     8    15    23 |  ----  ----  ---- |
emr | emr 2964 |     6     6    21 |    10    17    29 |    16    13    37 |
esa | esa 2976 |     7     5    22 |     8    13    23 |     9    14    26 |
gfz | gfz 2963 |    13    12    19 |    12    25    81 |    11    14    29 |
grg | grg 2880 |     8    11    21 |    12    17    42 |  ----  ----  ---- |
igr | igr 2976 |     6     6    20 |     8    14    25 |  ----  ----  ---- |
igs | igs 2900 |     6     6    23 |     8    13    23 |    14    15    30 |
jpl | jpl 2866 |     7     7    24 |    10    15    35 |    11    14    29 |
mit | mit 2976 |    50    29    71 |    13    14    38 |  ----  ----  ---- |

Table 5.1671.2   GPS week: 1671   Day: 2   MJD: 55943.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6     5    13 |     8    10    20 |     6     9    16 |
emr | emr 2964 |     9     8    20 |    11    11    31 |    10    12    18 |
esa | esa 2976 |     7     4    14 |     8    10    21 |     6     8    15 |
gfz | gfz 2964 |     8     4    14 |    12    21   104 |     7    11    16 |
grg | grg 2976 |     7     6    17 |    13    10    32 |    11    21    21 |
igr | igr 2976 |     7     4    13 |     8    10    21 |     7    10    15 |
igs | igs 2957 |     7     5    12 |     8    10    22 |     8    12    14 |
jpl | jpl 2772 |     7     7    17 |    12    11    36 |    26    25    48 |
mit | mit 2976 |     7     5    16 |    14    10    30 |    11    16    18 |

Table 5.1671.3   GPS week: 1671   Day: 3   MJD: 55944.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2975 |     7     5    20 |    11    16    31 |     9     7    20 |
emr | emr 2964 |    10    12    26 |    13    17    32 |    11    11    23 |
esa | esa 2976 |     8     9    25 |    11    16    33 |    10     8    22 |
gfz | gfz 2963 |     7     9    22 |    13    25    88 |     9     7    21 |
grg | grg 2976 |    10    15    29 |    12    15    41 |    12    15    31 |
igr | igr 2976 |     7     7    21 |    11    15    32 |     7     8    19 |
igs | igs 2910 |     8     8    21 |    11    16    28 |     9    10    20 |
jpl | jpl 2959 |     9    12    22 |    12    17    31 |     9     7    18 |
mit | mit 2976 |     8     8    23 |    13    16    39 |    12    12    24 |

Table 5.1671.4   GPS week: 1671   Day: 4   MJD: 55945.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9     9    19 |    12    11    37 |    16    19    64 |
emr | emr 2964 |    11    16    33 |    15    14    44 |    24    17    50 |
esa | esa 2976 |     9    12    21 |    13    11    37 |    10    20    74 |
gfz | gfz 2964 |    10    11    22 |    21    18    69 |    16    25    63 |
grg | grg 2976 |     9    11    24 |    16    14    45 |    16    25    90 |
igr | igr 2976 |     9    11    19 |    13    11    35 |    12    18    66 |
igs | igs 2918 |     9    11    18 |    13    11    37 |     7    25    82 |
jpl | jpl 2868 |    14    14    28 |    14    16    41 |    26    19    64 |
mit | mit 2976 |     9    10    25 |    14    12    41 |    16    21    57 |

Table 5.1671.5   GPS week: 1671   Day: 5   MJD: 55946.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9    10    23 |     7     7    33 |     7     9    16 |
emr | emr 2964 |    15    22    37 |    10     8    31 |    16    20    36 |
esa | esa 2976 |    11    13    22 |     8     8    33 |     8    10    22 |
gfz | gfz 2964 |    10    13    25 |    11    20    45 |    14    11    39 |
grg | grg 2976 |    13    13    25 |    12    11    42 |    10    19    37 |
igr | igr 2976 |    10    11    22 |     8     8    34 |     7     9    17 |
igs | igs 2924 |    10    14    22 |     8     8    35 |     8    10    20 |
jpl | jpl 2964 |    13    19    24 |     8     9    32 |    13    16    39 |
mit | mit 2976 |    11    13    26 |    13     9    45 |    15    20    42 |

Table 5.1671.6   GPS week: 1671   Day: 6   MJD: 55947.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9     7    19 |     9     8    30 |     6    11    15 |
emr | emr 2964 |    13    13    32 |    10     8    35 |    10    12    16 |
esa | esa 2976 |    10     9    23 |    10     8    31 |     6     9    13 |
gfz | gfz 2965 |    11    10    27 |    12    10    38 |     9    16    28 |
grg | grg 2976 |    11    12    26 |    13     7    39 |     8    11    17 |
igr | igr 2974 |     9     9    23 |     9     8    29 |     6    13    14 |
igs | igs 2937 |    10    12    26 |    10     8    31 |     7    11    15 |
jpl | jpl 2861 |    13    13    36 |    10    10    32 |    34    18    41 |
mit | mit 2976 |    10     9    22 |    14    12    45 |     8    11    18 |


Table 6: Earth Orientation Parameters weekly summary.                          
                                                                              
        Weekly mean and standard deviation of Centre ERP, ERP rates and       
        LOD differences with respect to IGS combined values. See Table 7 for  
        the daily summaries.                                                  
                                                                              
        Xpole,Xrt: x pole and x pole rate                          
        Ypole,Yrt: y pole and y pole rate                       
        LOD      : Length Of Day                                               
                                                                              
        AC LOD BIAS    : 21-day mean LOD bias with respect to Bulletin A     
        AC LOD BIAS RMS: RMS of AC LOD BIAS                              
                                                                              
        FLAG: "u" (used), "x" (excluded), "-" (no submission)                 
              for Xpole, Ypole, Xrt, Yrt and LOD                              

Table 6.1671   GPS week: 1671   MJD: 55941.500-55947.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      26      -6      57      87      0 |       7     19
            |      14      29      90      71      4 |       3
emr   uuuuu |      25      17    -139      49     -4 |      34     39
            |      33      14      83      75      6 |       3
esa   uuuuu |       0     -28     155     -86      3 |      -9     18
            |      15       8      37      71      3 |       2
gfz   uuuuu |      -6      10      73      23      1 |       9     19
            |      20      30     110      68      2 |       2
grg   uuuux |      51     -30      75       9     15 |      16     27
            |      20      21      88      49     37 |       4
igr   xxxxx |     -22      16      86      38      3 |      -2     17
            |      17      26      47      78      3 |       2
irf   xxxxx |      18      -2      29      -3     -2 |      -2     17
            |       4       8      23      52      9 |       2
jpl   uuuuu |    -120       0    -123     -48     -4 |      10     20
            |      53      23      95      93      7 |       3
mit   uuuuu |      -1      17    -160      25      4 |       9     18
            |      14      17      60     107      3 |       2
ngs   uuuuu |      17      65      -7      29     -2 |      -2     19
            |      64      44      55     153      9 |       3
sio   uuuuu |      40     -72    -118     136     -7 |      30     35
            |      33      32      84      89     10 |       2


Table 7.1671.0   GPS week: 1671   Day: 0   MJD: 55941.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      20     -26     -15     -38     -2 |      10     22
emr   uuuuu |      64       5    -132      10      0 |      35     40
esa   uuuuu |     -15     -37      86     -27      5 |      -8     20
gfz   uuuuu |     -13      69      25     -47      4 |      10     22
grg   uuuux |      58     -32      14      79    -16 |      20     31
igr   xxxxx |      -5      49      32      86      1 |       0     20
irf   xxxxx |      11      -4     -16     -38     -9 |       1     18
jpl   uuuuu |    -134      36     -24     -43     -4 |      12     22
mit   uuuuu |      -6      43    -111    -118      2 |       9     20
ngs   uuuuu |      61       3     106     119     -9 |       2     20
sio   uuuuu |       6    -103    -212      92      7 |      29     36

Table 7.1671.1   GPS week: 1671   Day: 1   MJD: 55942.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      19      -6     116      85     -1 |       9     21
emr   uuuuu |      22      31    -115      79     -2 |      35     40
esa   uuuuu |      19     -24     185     -25      4 |      -8     20
gfz   uuuuu |     -31      20     -52      29      3 |       9     21
grg   uuuux |      50     -51     102      14    -10 |      18     31
igr   xxxxx |     -29      -6      34      23      1 |      -2     19
irf   xxxxx |      16      -9      37     -56     -6 |       0     18
jpl   uuuuu |    -197      17    -193      20     -6 |      10     22
mit   uuuuu |      -4       7     -84     -89      5 |       9     20
ngs   uuuuu |     112      72     -33      38     -8 |       1     20
sio   uuuuu |      -3     -99     -40      51      4 |      29     36

Table 7.1671.2   GPS week: 1671   Day: 2   MJD: 55943.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      50     -10     126      71     -3 |       8     21
emr   uuuuu |      22      15    -259       9      3 |      35     40
esa   uuuuu |      21     -25     157     -12      2 |      -8     20
gfz   uuuuu |      18       4      88      25     -1 |      10     21
grg   uuuux |      59     -37     171      36    -25 |      17     31
igr   xxxxx |     -26       3     113      22      7 |      -1     19
irf   xxxxx |      21      -9      29     -26    -10 |      -1     19
jpl   uuuuu |    -120     -25     -81    -137      8 |      11     22
mit   uuuuu |       6      14    -159     -33      4 |      10     20
ngs   uuuuu |     -17      98     -16      83    -12 |      -1     20
sio   uuuuu |      25     -96    -141      58     -5 |      30     37

Table 7.1671.3   GPS week: 1671   Day: 3   MJD: 55944.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      24     -46     120     139     -6 |       6     19
emr   uuuuu |     -29      -6    -202      -1     -3 |      34     39
esa   uuuuu |      -7     -25     181    -103      3 |     -10     19
gfz   uuuuu |      -1     -10     157     120     -1 |       8     19
grg   uuuux |      28     -41     111      -5      3 |      10     21
igr   xxxxx |     -33      -4     133     -76      1 |      -3     18
irf   xxxxx |      18      -8      57      81      8 |      -4     17
jpl   uuuuu |     -36     -27    -108    -104    -12 |      10     20
mit   uuuuu |       8       9    -164     169      5 |       8     18
ngs   uuuuu |      -2     128       9    -184      8 |      -4     19
sio   uuuuu |      54     -88    -179     282    -12 |      29     35

Table 7.1671.4   GPS week: 1671   Day: 4   MJD: 55945.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      20       7     -36     191      4 |       5     19
emr   uuuuu |       4      29    -181     -20     -8 |      34     39
esa   uuuuu |      -8     -33     123    -182     -1 |     -10     19
gfz   uuuuu |       9      13     171      16     -1 |       8     19
grg   uuuux |      25     -25     125      11     27 |      11     21
igr   xxxxx |      -7      19     143      77      1 |      -3     18
irf   xxxxx |      23      11      45      55     11 |      -3     17
jpl   uuuuu |     -68      11     -44    -128     -3 |       8     20
mit   uuuuu |      11      37    -222     113     -1 |       9     18
ngs   uuuuu |     -12      14     -10     146     11 |      -4     19
sio   uuuuu |      62     -31    -137     156    -16 |      30     35

Table 7.1671.5   GPS week: 1671   Day: 5   MJD: 55946.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      40      -9     -62     101      5 |       9     19
emr   uuuuu |      25      26     -75      66    -14 |      37     41
esa   uuuuu |     -14     -13     182     -72      2 |      -7     15
gfz   uuuuu |       8     -28     198      91      3 |      11     19
grg   uuuux |      84     -34      97       9     66 |      19     25
igr   xxxxx |      -5      55      48     161      1 |       2     14
irf   xxxxx |      17       3      20       2      3 |       1     15
jpl   uuuuu |    -146      -9    -112     123    -13 |      12     20
mit   uuuuu |     -29      17    -253      67      9 |      13     19
ngs   uuuuu |      59      61     -48    -185      4 |       0     19
sio   uuuuu |      45     -34    -149      85    -14 |      33     36

Table 7.1671.6   GPS week: 1671   Day: 6   MJD: 55947.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   xxxxx |      10      47     146      62      1 |       3     11
emr   uuuuu |      66      22     -11     199     -7 |      28     31
esa   uuuuu |       1     -37     169    -178      8 |     -12     16
gfz   uuuuu |     -31       5     -77     -70      3 |       5     11
grg   uuuux |      49      14     -93     -83     62 |      20     28
igr   xxxxx |     -50      -4     101     -25      9 |      -4     11
irf   xxxxx |      22       5      32     -37    -10 |      -4     12
jpl   xxxxx |    -141      -5    -298     -70     -1 |       4     15
mit   uuuuu |       4      -7    -127      65      3 |       8     11
ngs   uuuuu |     -80      78     -57     188     -9 |      -7     13
sio   uuuuu |      92     -50      30     227    -17 |      26     31



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