[IGSREPORT-19014] Wk 1601 IGS Final Orbits

Jim Ray igs.acc at noaa.gov
Thu Sep 30 05:42:17 PDT 2010


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1601   (Sep 12, 2010 - Sep 18, 2010)

Contacts: J. Ray       (jim.ray at noaa.gov),
          J. Griffiths (jake.griffiths 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:

igs1601[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1601[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1601[0-6].cls  IGS GPS clock combination summary report.
igs16017.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16017.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 they either 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  |  ALL   | 1
                0  |  COD   | DGAR
                0  |  EMR   | WTZR HARB WTZR
                0  |  ESA   | IRKJ KERG SUTH UNSA
                0  |  GFZ   | ADE1 BAKO BRMU CEDU MATE MDVJ TIDB
                0  |  GRG   | DGAR IRKJ ONSA
                0  |  JPL   | 32
                0  |  MIT   | 15 15 TWTF TWTF
                1  |  ALL   | 1
                1  |  COD   | DGAR XMIS
                1  |  EMR   | WTZR WTZR
                1  |  ESA   | HARB KERG SUTH UNSA WHIT
                1  |  GFZ   | 30 FAA1 GLPS HARB HOB2 THTI WHIT
                1  |  GRG   | DGAR ONSA
                1  |  JPL   | 32
                1  |  MIT   | 22 22
                2  |  ALL   | 1 1
                2  |  COD   | DGAR
                2  |  EMR   | WTZR STR1 WTZR
                2  |  ESA   | STR1 ALGO SUTH
                2  |  GFZ   | ASPA BAKO GRAS KERG KOUC MDVJ
                2  |  GRG   | DGAR ONSA
                2  |  JPL   | 32
                2  |  MIT   | 24 21 24
                3  |  ALL   | 1
                3  |  COD   | YELL DGAR GOLD XMIS YELL
                3  |  EMR   | WTZR WTZR
                3  |  ESA   | KERG SUTH
                3  |  GFZ   | 12 25 ADE1 BJFS BRUS CEDU CHAT KARR MATE SFER WAB2
                3  |  GRG   | DGAR ONSA
                3  |  JPL   | 32 OUS2
                3  |  MIT   | FLIN IRKJ
                4  |  ALL   | 1
                4  |  COD   | BRMU DGAR XMIS
                4  |  EMR   | WTZR WTZR
                4  |  ESA   | BRMU IRKJ KERG NURK SUTH YAKT
                4  |  GFZ   | 12 HOFN KOUR MDVJ POVE WTZR YAKT
                4  |  GRG   | DGAR IRKJ ONSA YAKT
                4  |  JPL   | 32 KOUR
                4  |  MIT   | 1 25 25 BRMU
                5  |  ALL   | 1
                5  |  COD   | BJFS DGAR
                5  |  EMR   | WTZR WTZR
                5  |  ESA   | BJFS KERG UNSA
                5  |  GFZ   | BAKO GODE HARB MDVJ SFER WES2
                5  |  GRG   | DGAR NRC1 WTZR
                5  |  JPL   | 32 ZWE2
                5  |  MIT   | 9 15 18 20 22 26 28 6 9 15 18 20 22 26 28 BJFS NRC1
                6  |  COD   | DGAR
                6  |  EMR   | WTZR WTZR
                6  |  ESA   | BJFS
                6  |  GFZ   | BJFS DGAR IRKJ KOUC MDVJ UNSA
                6  |  GRG   | DGAR NRC1 ONSA
                6  |  JPL   | 32 HARB
                6  |  MIT   | 4 4 ALGO ALGO BJFS GRAZ

 5. Velocity changes were estimated to alleviate the effects of modeling
    problems, experienced by all centres,in the Long Arc (LA) process.
    
             Velocity changes per day and affected satellites:
    
               Day |  0 |  1 |  2 |  3 |  4 |  5 |  6 |
           --------+----+----+----+----+----+----+----+
           PRN G01 |    |    |    |    |    |    |  2 |
           PRN G09 |    |    |  2 |    |    |    |    |

 6. Starting on 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) 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.

 7. Small rotations were applied to all the AC orbit and ERP values in order
    to align them to the IGS05 frame. These rotations were estimated in the IGS
    SINEX combination process, performed by the IGS Reference Frame Coordinator
    at the Institut Geographique National (IGN), and are based on the common
    stations between the individual AC SINEX solutions and the IGS05.snx SINEX
    frame. 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  |     .7    1.5     .7     -16    -10    -33    -.27
       EMR  |    6.1    7.5   -3.2       0    -10      4     .05
       ESA  |    3.9    3.5    8.4      55     11    -44    -.17
       GFZ  |    -.1    1.8     .5      32     10    -51    -.14
       GRG  |    3.5   12.4    4.8      35     60    -15    -.18
       JPL  |    3.8    9.2   -4.5      -2    -43      1     .0 
       MIT  |    4.2    3.8    9.5      17     20    -31    -.28
       NGS  |    6.2    4.8    5.5      81    -99     21    -.16
       SIO  |    5.3    6.5   -5.9     103   -110     -7    -.14


 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 on 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) the absolute antenna
    model is introduced (IGSMAIL #5272). The antenna phase center offsets and
    phase center variations are given in the file:
        ftp://igscb.jpl.nasa.gov/pub/station/general/igs05.atx

    
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 1.1601.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1601.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 2.1601.[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 3.1601.[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 5.1601.0-6).

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 1601 summary.                       (Sep 12, 2010 - Sep 18, 2010)

Table 1.1601.a   GPS week: 1601   MJD: 55451.000-55457.000

         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  230|    0     0    -1    87   -17   -33  -.18    7    7 |    -413    -145     15     62
        |    0     0     0    13    18    19   .03           |     382     730
emr   88|    1     0    -2    85     5    19   .50   19   19 |   -3140    1244     15     83
        |    2     2     0    21    31    16   .04           |    3409    1261
esa  131|    0     0     2   -57   -47   -11   .29    8    8 |   -1347    1408     13    108
        |    1     0     0     5    15    20   .04           |    1578    2423
gfz  198|   -1     1    -1    25   -52     0  -.17   13   13 |     218    -152     25    108
        |    0     0     1    80    70    16   .01           |     206     483
grg  123|    0     2     6    -6  -166     3   .59   17   17 | 1428457     -58     48    210
        |    1     0     2    20    25    21   .03           | 3779694     712
igr  n/a|    0    -1     0    63   -21    14  -.02    5    5 |     801    1548     16     52
        |    0     0     0    28    25    15   .03           |    4388    1381
jpl  123|    0    -1    -3    48    50    51   .54   19   19 |     125    1218     18    108
        |    1     1     1    13    23    23   .03           |    5017    1188
mit  259|    0     0    -1    30   -70    19  -.36   11   10 |    -139     140     21    157
        |    0     0     1    23    18     7   .04           |     296     532
ngs  215|    0    -1     0  -106   165    21  -.22   10    8 |  -67357  210517   2228   3792
        |    0     0     1    47    29    13   .04           |  423239 1121364
sio  255|    0     1    -2  -151   208    -5  -.28   22   22 |     ---     ---    ---    ---
        |    0     0     1    33    14     7   .03           |     ---     ---


Table 1.1601.b   GPS week : 1601   MJD: 55451.000-55457.000   

         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  |   18   19   16   17   17   24   35 |
   2  |    5    5    5    5    4    5    5 |
   3  |    4    4    4    4    4    4    4 |
   4  |    4    4    4    5    4    4    5 |
   5  |    4    4    4    4    4    4    5 |
   6  |    4    4    4    4    4    4    4 |
   7  |    5    5    5    5    5    5    5 |
   8  |    4    4    4    4    4    4    4 |
   9  |    4    5    8    5    4    4    5 |
  10  |    3    3    3    4    4    4    4 |
  11  |    4    4    4    4    4    4    4 |
  12  |    5    5    4    5    5    4    5 |
  13  |    5    5    4    5    5    5    5 |
  14  |    4    5    4    4    4    5    5 |
  15  |    5    5    5    5    5    5    6 |
  16  |    5    5    5    5    5    5    5 |
  17  |    4    5    5    4    4    4    5 |
  18  |    5    5    5    5    4    5    5 |
  19  |    4    4    5    4    4    4    4 |
  20  |    4    4    4    4    4    4    5 |
  21  |    5    5    5    5    5    5    6 |
  22  |    4    4    4    4    4    4    5 |
  23  |    5    5    5    5    5    5    5 |
  24  |    4    4    4    4    4    4    4 |
  25  |   12   11   11   12   10   11   12 |
  26  |    4    3    4    4    4    4    4 |
  27  |    5    5    4    4    4    4    5 |
  28  |    5    5    5    6    5    6    6 |
  29  |    6    6    5    6    6    5    6 |
  30  |    4    5    4    5    3    4    4 |
  31  |    5    5    5    5    4    4    4 |
  32  |    4    4    4    4    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 2.1601.0   GPS week: 1601   Day: 0   MJD: 55451.000                            

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  230|    0     0    -2    72   -19   -27  -.24    7    7 |    -585     142     15     61
        |                     31    13                       |
emr   88|    4     1    -1   110    30    39   .42   19   19 |   -6542    1859     15     78
        |                   -108   -51                       |
esa  131|   -1     0     3   -57   -40   -43   .25    7    7 |   -3180    5286     13     99
        |                     33     0                       |
gfz  198|   -2     0    -3     6  -127     9  -.18   12   12 |     172      63     24    111
        |                    -37   -14                       |
grg  123|    0     2     9   -24  -157    26   .54   17   17 |    -583     973     43    214
        |                     32    15                       |
igr  n/a|    0    -1     0    70   -33    39  -.04    5    5 |   -4130    2329     16     51
        |                    -63   -21                       |
jpl  123|    2    -2     0    45    38    98   .51   18   18 |   -6533    1832     19    115
        |                     43    38                       |
mit  259|    0     0    -2    37   -92    26  -.33   14   13 |    -671     961     22    158
        |                      3    14                       |
ngs  215|    1    -1     1   -68   214     3  -.17    9    7 |   66593   24742   2052   4092
        |                    -18   -35                       |
sio  255|    0     1    -5  -170   221    -6  -.32   23   21 |     ---     ---    ---    ---
        |                     63  -112                       |

Table 2.1601.1   GPS week: 1601   Day: 1   MJD: 55452.000                            

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  230|    0     0     0   109   -26   -48  -.18    7    7 |    -927     606     13     54
        |                     -4    33                       |
emr   88|    3    -2    -3   116    65    36   .51   20   20 |   -5559    -532     16     75
        |                   -110   -41                       |
esa  131|   -1     0     2   -49   -45     2   .29    8    7 |    -736    1040     15    112
        |                     22    53                       |
gfz  198|   -2     1    -2  -102   -77    20  -.16   13   11 |      25     253     28    109
        |                     -8    60                       |
grg  123|    0     1     6    21  -164    10   .59   18   17 |    -292     598     46    206
        |                    -37    64                       |
igr  n/a|    0     0     1    89   -18    14   .01    5    5 |   -2610      39     17     54
        |                    -81   -10                       |
jpl  123|    0    -2    -1    61   101    26   .57   20   20 |   -5457    -569     20    119
        |                     42  -101                       |
mit  259|    0     1     0   -13   -53    20  -.33   10    9 |    -148     520     22    185
        |                      6    -3                       |
ngs  215|    0     0     0   -57   170    24  -.18   10    7 |    -944     610   2241   3863
        |                    -50   -25                       |
sio  255|    0     1    -3  -210   212    -5  -.31   23   22 |     ---     ---    ---    ---
        |                     57   -85                       |

Table 2.1601.2   GPS week: 1601   Day: 2   MJD: 55453.000                            

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  230|    0     1    -1    97   -49     5  -.17    7    7 |     229   -1478     18     66
        |                     24    36                       |
emr   88|    5     2    -2    73     2    15   .50   20   20 |   -6593    2697     18     86
        |                    -49   -27                       |
esa  131|    0     0     1   -51   -58   -25   .27    9    8 |   -1767    2272     15     97
        |                     57    32                       |
gfz  198|   -1     2     2    -4    72   -28  -.19   11   11 |     612   -1049     25    107
        |                     -2     4                       |
grg  123|    0     2     7   -29  -213   -32   .62   19   19 |     249   -1027     48    230
        |                     29   125                       |
igr  n/a|   -1    -1     1    63   -62    13  -.01    6    5 |   -3014    3037     17     53
        |                    -18     6                       |
jpl  123|    1     0    -2    29    49    60   .56   19   19 |   -1867    2341     18    103
        |                     46   -41                       |
mit  259|    0    -1    -1    39   -47    10  -.32   10    9 |     -51    -424     25    132
        |                     -1    -7                       |
ngs  215|    0    -2     0  -129   124     1  -.21   10    8 | -945212 2666902   2335   3816
        |                     46    43                       |
sio  255|    0     1    -3  -134   211    -7  -.29   25   20 |     ---     ---    ---    ---
        |                     55   -78                       |

Table 2.1601.3   GPS week: 1601   Day: 3   MJD: 55454.000                            

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  230|    0     0    -2    75   -11   -33  -.17    7    7 |    -252    -161     15     64
        |                     28    28                       |
emr   88|    3    -1    -2    60    -6     1   .50   20   20 |   -4136    2418     16     83
        |                    -47     2                       |
esa  131|    0    -1     3   -62   -68    -9   .34    7    7 |   -1413    1353     12    110
        |                     47    48                       |
gfz  198|   -1     3     0   157   -14    10  -.15   16   15 |     117     -82     26    126
        |                    -38    -8                       |
grg  123|   -1     2     6   -19  -174    -4   .58   19   17 |    -270      18     44    210
        |                     26   106                       |
igr  n/a|   -1     0     1     1   -29    -4   .01    5    5 |    -110    2689     16     63
        |                     10   -23                       |
jpl  123|   -1     0    -6    45    50    50   .55   18   18 |     321    2192     17    109
        |                     18    12                       |
mit  259|    0     0     0    62   -59    18  -.37    9    9 |    -390     334     18    172
        |                      5    -6                       |
ngs  215|    0     0     1  -194   145    29  -.26   10    8 |      52    -639   2397   3734
        |                     84    65                       |
sio  255|    0     1    -2  -117   219     7  -.30   20   22 |     ---     ---    ---    ---
        |                     54   -84                       |

Table 2.1601.4   GPS week: 1601   Day: 4   MJD: 55455.000                            

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  230|    0     0    -1    93     0   -45  -.16    7    7 |    -440    -397     17     58
        |                     -2     8                       |
emr   88|    0     1    -3    77   -17     6   .54   19   19 |   -1394    1812     15     85
        |                    -60    17                       |
esa  131|    0    -1     2   -61   -50   -14   .33    8    7 |    1458   -1569     18    115
        |                     44    61                       |
gfz  198|    0     1    -1    76  -103     0  -.15   12   11 |     256    -200     27    105
        |                    -45    -2                       |
grg  123|    0     1     2    19  -131    26   .63   16   15 |      50    -542     53    204
        |                    -27    49                       |
igr  n/a|    0    -1     0    69    -6    17  -.01    4    4 |    2953    2384     17     47
        |                    -21     2                       |
jpl  123|   -1    -2    -5    56    34    32   .55   21   21 |    2831    2054     20    120
        |                     44    -3                       |
mit  259|    2     0    -1    22   -85    24  -.37    9    8 |      88    -458     20    127
        |                     14    -3                       |
ngs  215|    0     0     2  -124   187    37  -.23    9    7 |    -649    -131   2228   3503
        |                    -45     3                       |
sio  255|    1     0    -1  -166   181     1  -.26   21   24 |     ---     ---    ---    ---
        |                     67   -90                       |

Table 2.1601.5   GPS week: 1601   Day: 5   MJD: 55456.000                            

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  230|    0     0     0    83     5   -31  -.19    7    8 |    -726     663     15     71
        |                     20    13                       |
emr   88|   -2     0    -1    65   -14     3   .52   19   19 |    1253     485     14     77
        |                    -73    17                       |
esa  131|    1     0     2   -55   -50    -9   .27    7    7 |   -3029    2923     11    105
        |                     59    15                       |
gfz  198|    0     0     0     1   -14     2  -.18   13   12 |      24     392     22    103
        |                    -26    -6                       |
grg  123|    0     2     6    -8  -151     6   .62   16   17 |      52     186     50    206
        |                     11    86                       |
igr  n/a|    0     0     0    63    18    26  -.05    4    4 |    6286     731     15     55
        |                    -18   -32                       |
jpl  123|    0    -1    -3    66    40    51   .50   19   19 |    5774     820     18     94
        |                     -2    -3                       |
mit  259|    1     0    -2    34   -69     9  -.43   10   10 |     173     292     25    183
        |                      9     0                       |
ngs  215|   -1     0     0   -73   147    30  -.26   10    9 |  -45860 -594772   2204   3972
        |                    -52    75                       |
sio  255|    0     2    -2  -139   195    -9  -.27   22   21 |     ---     ---    ---    ---
        |                     63   -84                       |

Table 2.1601.6   GPS week: 1601   Day: 6   MJD: 55457.000                            

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  230|   -1     0     0    79   -20   -53  -.15    7    7 |    -192    -393     15     63
        |                     21    28                       |
emr   88|    0     4    -1    92   -17    34   .50   18   18 |     990     -30     16    101
        |                    -90    28                       |
esa  131|    1     0     0   -64   -19    20   .24    8    8 |    -767   -1449     12    123
        |                     21     8                       |
gfz  198|   -1     0    -3    39  -103   -17  -.18   15   16 |     326    -442     26    101
        |                    -66    31                       |
grg  123|    2     1     6    -4  -175   -11   .57   17   18 | 9999999    -616     54    204
        |                     -7    57                       |
igr  n/a|   -1     0     0    83   -19    -2  -.05    5    5 |    6232    -368     19     47
        |                    -21    13                       |
jpl  123|   -1     1    -3    37    40    43   .51   19   19 |    5810    -139     17     96
        |                     47    26                       |
mit  259|    0    -1    -1    31   -88    29  -.41   12   12 |      22    -243     18    146
        |                     22     4                       |
ngs  215|    0    -1     1   -98   170    20  -.26   10    8 |  454517 -623089   2143   3565
        |                    -93    61                       |
sio  255|    0     2     0  -119   214   -16  -.24   23   22 |     ---     ---    ---    ---
        |                     55   -90                       |

       
       
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 3.1601.0   GPS week: 1601   Day: 0   MJD: 55451.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   16  ---  ---   56  ---   28  ---   22   30  ---   18 |    31  ---  ---   60  ---   67  ---   24   36  ---    31
   2  |    7   27    6   14   20    5   20   10    8   21    4 |    18  ---   14   15   29   14   27   16   19   22    16
   3  |    5   17    7   13   11    5   14   18    7   24    4 |    15  ---   19   16   23   17   29   14   17   29    18
   4  |    6   15    8   15   12    6   14   13    8   25    4 |    60  ---   60   67   65   64   62   64   58   60    62
   5  |    6   19    6   11   19    5   17   12    9   26    4 |    23  ---   29   30   36   25   30   23   28   23    25
   6  |    5   18    6   13   11    6   15   14    7   24    4 |    18  ---   21   18   25   20   32   18   20   31    21
   7  |    8   24    7   12   21    6   23   10    8   13    4 |    14  ---   14   16   27   11   23   12   15   17    12
   8  |    7   16    6   10   14    5   12   10   10   17    3 |     9  ---   12   12   17    9   19   11   12   18    12
   9  |    7   16    8   11   13    6   15   15    8   29    4 |    13  ---   15   14   18   12   24   16   16   28    14
  10  |    5   16    5   11   11    4   11   10    9   11    3 |    25  ---   28   32   33   28   24   28   30   22    25
  11  |    4   16    9   14   19    4   17   11    8   11    4 |    27  ---   27   27   34   27   31   28   30   28    25
  12  |    9   19    9   16   17    4   21   13   11   29    5 |    21  ---   28   27   29   23   34   20   29   23    25
  13  |    8   20    5   10   22    5   19   14    9   21    4 |    15  ---   19   19   33   16   31   19   18   24    16
  14  |    6   24    7   12   16    4   23   11    7   17    4 |    14  ---   18   20   25   15   27   14   17   17    15
  15  |    9   21    8   13   16    3   24   14   10   16    4 |    17  ---   19   22   24   19   31   21   22   20    21
  16  |    7   20    9   11   16    6   20   17    8   33    4 |    27  ---   30   28   35   28   38   24   30   25    29
  17  |    5   22    7   11   18    5   23   12    6   21    4 |    23  ---   23   23   36   25   39   28   25   30    26
  18  |    7   20    6   15   16    7   20   19    8   28    4 |    16  ---   23   26   22   17   25   22   21   24    18
  19  |    6   23    8    9   19    3   23   12    6   16    4 |    20  ---   29   22   33   23   37   20   24   25    26
  20  |    6   17    6    8   16    3   16   10    6   19    3 |    31  ---   40   37   43   34   37   35   32   30    34
  21  |    5   26    8   11   20    7   23   22   14   13    5 |    22  ---   20   13   26   18   34   26   24   22    21
  22  |    7   18    6   10   10    5   19   10    8   30    4 |    21  ---   29   29   28   25   28   28   28   34    25
  23  |    6   20    9    8   17    3   22   13    9   25    4 |    17  ---   21   18   28   19   32   19   21   26    20
  24  |    7   14    7   10   14    5   12   16    7   23    3 |    14  ---   20   18   17   18   24   13   14   22    15
 X25  |   33  ---   16   23  ---    9  ---   20   15  ---   11 |    28  ---   26   26  ---   21  ---   24   24  ---    20
  26  |    6   16    7    9   15    3   12   13   10   17    3 |    13  ---   16   16   22   13   23   15   13   19    13
  27  |   12   17    6   12   15    5   16   19    7   22    4 |    64  ---   65   65   65   67   76   65   66   71    64
  28  |    6   21    7   11   13    7   22   12   10   48    5 |    22  ---   26   28   31   24   33   24   21   46    23
 X29  |    6   21    9   11   38    4   19   13   16  ---    6 |    26  ---   23   21   42   23   37   23   31  ---    23
  30  |    9   14    6   18   19    4   10   11   13   20    4 |    26  ---   29   29   30   26   26   26   32   19    28
  31  |    6   19    7   11   24    4   17   12   10   19    4 |    21  ---   24   20   34   20   28   19   21   25    20
  32  |    6   18    6   10   18    4   15   12   11   24    4 |    16  ---   24   23   29   20   20   19   18   27    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    7   12   17    5   18   14    9   23      |T   22  ---   25   26   31   24   32   23   25   27    23
 WRMS |    7   19    7   12   17    5   18   13    7   21      |NE  22  ---   25   26   31   24   32   23   25   27    23
 MEDI |    6   19    7   11   16    5   17   13    8   21      |MD  21  ---   23   22   29   20   30   21   22   25    21

Table 3.1601.1   GPS week: 1601   Day: 1   MJD: 55452.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   13  ---  ---   26  ---  230  ---  ---  ---  ---   18 |    25  ---  ---   37  ---  201  ---  ---  ---  ---    28
   2  |    8   25    6   10   20    6   22    7   15   20    4 |    16  ---   18   15   27   15   27   15   19   22    14
   3  |    5   19    6   11   17    5   14   12    7   23    4 |    15  ---   20   14   18   15   28   16   14   24    15
   4  |    7   16    9    9   12    5   13   13   11   25    4 |    75  ---   78   70   72   74   76   75   74   78    75
   5  |    5   18    7   10   18    5   19    7    9   22    4 |    22  ---   25   19   31   21   30   19   22   21    20
   6  |    5   22    5   13   14    5   17   10    8   22    4 |    16  ---   22   18   21   17   32   19   17   26    18
   7  |    7   24    7   15   19    5   25    9    9   14    4 |    17  ---   19   19   27   16   25   16   18   16    15
   8  |    7   16    5    8   13    5   15    9   10   19    3 |    15  ---   14   13   17   12   19   13   19   17    13
   9  |   12   21    9   16   16    4   18    9   16   27    5 |    18  ---   23   24   20   20   25   18   24   37    18
  10  |    5   12    6    9   12    4   12    7   13   15    3 |    24  ---   23   21   27   21   23   22   26   20    22
  11E |    6   18    7    9   16    3   18    8    9   26    4 |    29  ---   30   30   36   30   34   27   26   32    28
  12  |    7   20    7   18   15    5   21    9   13   25    4 |    18  ---   25   22   27   22   33   18   22   20    19
  13  |    7   21    7    7   23    5   22   12    8   21    4 |    17  ---   17   15   32   16   31   19   16   22    14
  14  |    6   25    8   11   18    6   25    9   10   16    4 |    16  ---   20   17   28   17   27   15   19   16    16
  15  |    7   23    7   13   15    6   28   10    8   15    4 |    18  ---   20   20   25   18   30   18   17   16    17
  16  |    8   21   10   18   19    5   23    7    6   32    5 |    23  ---   26   26   29   23   34   23   20   22    22
  17  |    8   24    9   12   20    3   26   11   10   23    4 |    22  ---   22   19   28   19   32   22   21   27    20
  18  |    6   22    6   17   13    5   23   13    6   27    4 |    14  ---   20   24   23   14   26   16   15   22    14
  19  |    6   25    6    8   18    4   27   10    8   17    4 |    17  ---   21   17   30   19   34   16   20   18    18
  20  |    4   18    6   10   22    4   18    8   10   18    4 |    32  ---   35   33   40   32   41   31   34   31    33
  21  |    7   26   11   13   27    6   23   15    8   16    5 |    20  ---   20   13   32   17   28   21   21   20    18
  22  |    7   19    7   10   10    5   24    7    5   30    4 |    16  ---   20   19   23   15   27   18   16   27    15
  23  |    7   24    8    8   22    4   24   10   11   24    4 |    19  ---   20   19   29   19   35   20   20   21    18
  24  |    6   18   10    9   13    4   17   12    8   20    4 |    15  ---   19   14   18   14   24   14    9   19    13
 X25  |   29  ---   16   22  ---   13  ---   19   12  ---   10 |    20  ---   32   26  ---   27  ---   21   24  ---    21
  26  |    6   15    6   10   12    5   13    9    9   14    3 |    17  ---   19   15   20   15   20   16   18   16    15
  27  |   12   18   10   11   15    5   17   10   14   19    4 |    36  ---   39   39   39   38   37   36   42   41    36
  28  |    7   20    9   12   15    5   22   10    7   46    5 |    13  ---   19   21   22   15   27   13   14   43    13
 X29  |    8   17    6   13   39    5   19   11   12  ---    5 |    23  ---   28   24   43   22   31   20   17  ---    20
  30  |    8   15    5   29   19    5    9    8   11   17    4 |    22  ---   24   28   26   22   24   18   24   18    21
  31  |    7   18    6   10   24    5   19   16   12   19    4 |    24  ---   27   25   37   25   30   23   26   24    23
  32  |    5   19    8    9   19    3   17    9    6   23    4 |    15  ---   20   17   24   16   24   14   19   25    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   20    8   13   18    5   20   10   10   23      |T   21  ---   24   22   29   27   30   21   22   25    20
 WRMS |    7   20    7   11   17    5   20    9    7   22      |NE  21  ---   24   22   28   27   30   20   22   25    20
 MEDI |    7   19    7   11   17    5   19   10    9   21      |MD  18  ---   21   19   27   19   28   18   20   22    18

Table 3.1601.2   GPS week: 1601   Day: 2   MJD: 55453.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   23   72  ---   28  ---   50  ---   18   35  ---   16 |    26  ---  ---   49  ---   57  ---   25   44  ---    32
   2  |    7   26    7   14   21    5   20   10   11   17    4 |    13  ---   16   17   29   15   24   19   18   22    16
   3  |    7   17    8   11   16    3   13    7    9   21    3 |    12  ---   17   20   18   14   22   13   16   24    14
   4  |    8   18    8   12   13    5   12   10    8   23    4 |    77  ---   75   76   75   76   71   78   79   73    74
   5  |    6   19    7   14   18    4   19   10   11   20    4 |    22  ---   26   30   38   25   31   23   22   20    23
   6  |    7   19    9   13   15    3   16    7    9   19    4 |    12  ---   18   21   19   14   24   15   16   22    14
   7  |    7   26   10   15   23    6   26    9    9   16    5 |    15  ---   21   19   31   15   26   18   17   18    14
   8  |    7   16    7   12   19    5   12   10    8   16    3 |    13  ---   13   14   17   15   20   15   14   18    12
   9  |    9   21   16    7   27   17   18   22   19   74    8 |    18  ---   20   19   30   28   26   23   33   59    19
  10  |    5   12    8   11   16    3   11    8    7   15    3 |    20  ---   21   30   27   22   21   26   24   18    22
  11E |    6   16    9    8   14    4   16    7    8   11    3 |    24  ---   26   21   30   23   27   23   25   20    21
  12  |    5   17    9   12   18    7   19    8   10   25    4 |    19  ---   22   24   24   24   30   20   23   21    19
  13  |    7   22    8    8   24    4   23    9    6   19    4 |    17  ---   21   20   34   19   30   19   18   26    16
  14  |    5   17    8   11   17    5   21    8    8   15    4 |    13  ---   18   19   27   15   24   15   16   18    14
  15  |    7   25    8   11   23    5   24   12   10   12    4 |    22  ---   20   23   31   20   30   19   14   21    17
  16  |    9   22    8   15   20    4   22   12   11   29    5 |    20  ---   22   25   24   21   31   19   22   22    18
  17  |    8   26    7    9   20    4   22    9    9   20    4 |    20  ---   19   19   24   21   31   23   20   29    19
  18  |    8   22    9   16   16    6   20   10    9   27    4 |    12  ---   20   26   26   16   25   16   15   20    14
  19  |    7   28    9   10   16    4   25    8    7   15    4 |    17  ---   27   26   29   21   35   20   20   25    22
  20  |    8   18    7    8   19    4   20    8    9   14    4 |    33  ---   34   38   37   32   34   33   31   32    33
  21  |    7   25   10   13   26    4   23   13   12   12    5 |    14  ---   14   16   27   11   26   20   19   19    15
  22  |    8   19    6   11   15    5   20    6    8   30    4 |    22  ---   26   27   32   24   29   23   22   30    22
  23  |    7   25    9    9   21    6   22    8    7   22    4 |    21  ---   28   22   31   23   32   22   20   24    19
  24  |    6   17    9    8   16    5   13   12    7   19    3 |    16  ---   21   16   22   19   22   17   16   21    16
 X25  |   31  ---   19   14  ---    7  ---   18   11  ---   10 |    27  ---   26   18  ---   18  ---   21   20  ---    17
  26  |    5   14    9    9   21    3   13   11    9   13    3 |    14  ---   17   14   21   14   20   15   11   15    13
  27  |    6   18    8    9   17    7   16   10   13   17    4 |    29  ---   29   30   34   31   34   31   37   35    30
  28  |    6   18    9   11   18    6   22    9   10   45    5 |    17  ---   20   20   26   18   27   21   17   48    17
 X29  |    6   21    8   16   37    5   17   10   10  ---    5 |    31  ---   25   21   45   29   32   22   23  ---    22
  30  |    5   12    9   10   20    4    9    7    9   19    3 |    20  ---   28   21   29   22   23   22   21   19    22
  31  |    8   19    7   13   21    4   17   16    9   16    4 |    15  ---   19   16   28   16   24   14   16   19    15
  32  |    7   18   10    7   19    5   16   10    7   23    4 |    14  ---   21   18   26   19   22   17   16   26    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   20    9   11   19    6   19   10   10   25      |T   20  ---   23   24   29   23   28   22   22   26    20
 WRMS |    7   20    8   11   19    5   19    9    8   20      |NE  20  ---   23   24   29   23   28   22   22   26    20
 MEDI |    7   19    8   11   19    5   19   10    9   19      |MD  18  ---   21   21   28   20   26   20   20   22    17

Table 3.1601.3   GPS week: 1601   Day: 3   MJD: 55454.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   26   59  ---   25  ---   53  ---   15   47  ---   17 |    32  ---  ---   39  ---   72  ---   20   56  ---    30
   2  |    6   21    6   22   21    9   18    9   15   16    4 |    13  ---   17   20   26   18   24   15   22   20    16
   3  |    8   17    6   11   16    5   15    7    9   20    3 |    12  ---   17   11   16   16   23   14   20   24    16
   4  |    7   16   10   16   43    6   13    8    7   19    5 |    76  ---   79   79   58   78   78   81   78   79    77
   5  |    5   16    6   16   17    4   19    8    9   20    4 |    25  ---   33   32   35   28   33   27   31   25    29
   6  |    8   21    6   10   14    5   16    7    6   19    3 |    15  ---   17   13   19   17   27   15   19   24    16
   7  |    8   24    7   20   18    4   22    7    9   16    4 |    19  ---   20   24   28   18   23   19   22   20    19
   8  |    7   15    7   13   20    4   12    9    8   16    3 |    10  ---   15   14   18   14   18   12   17   16    13
   9  |    9   20    7   11   16    9   15   13   14   23    4 |    17  ---   20   18   23   22   26   19   28   27    20
  10  |    5   14    6   14   13    4   14    8   11   14    3 |    23  ---   29   29   30   27   21   25   27   21    25
  11E |    8   16    8    9   16    4   19    8    9    9    3 |    23  ---   30   25   35   26   33   24   29   21    26
  12  |    8   18    6   31   16    7   18    8   11   22    4 |    19  ---   25   29   29   26   31   23   25   25    23
  13  |    7   24    7   13   25    3   22   10   10   19    4 |    13  ---   17   19   35   17   29   14   21   23    16
  14  |    6   16    9   13   17    6   21    7   10   13    4 |    16  ---   20   19   26   20   29   18   23   21    19
  15  |    7   24    9   18   18    5   26   10   12   13    5 |    23  ---   28   27   32   24   33   25   25   28    25
  16  |    7   22    8   15   17    5   19   11    8   31    4 |    28  ---   29   31   32   29   35   28   32   24    29
  17  |    8   20    8   12   18    4   20   10    8   17    4 |    23  ---   25   25   28   26   32   27   30   31    26
  18  |    6   20    6   19   14    5   21    6   13   29    4 |    14  ---   19   25   24   19   26   15   25   23    18
  19  |    6   25    8   11   18    3   25    8    6   17    4 |    21  ---   22   17   30   23   32   19   21   23    22
  20  |    6   17    7   11   15    6   17    7   12   13    3 |    22  ---   31   27   36   27   30   26   29   21    26
  21  |   12   23    8   24   21    4   20   13    9   13    5 |    19  ---   20   18   29   16   29   23   23   22    18
  22  |    6   18    6   14   12    5   18    7    8   28    4 |    17  ---   23   28   28   24   28   23   26   31    22
  23  |    6   26    8   14   20    3   23    9   12   22    4 |    17  ---   23   18   30   20   31   19   29   25    21
  24  |    7   16    7    8   12    4   13   11   10   20    3 |    11  ---   16   12   16   14   21   11   13   20    12
 X25  |   34  ---   16   25  ---    8  ---   20   14  ---   12 |    27  ---   26   27  ---   26  ---   25   26  ---    22
  26  |    5   17    8   13   15    5   13   10   12   13    3 |    15  ---   21   18   24   18   22   14   18   16    17
  27  |    9   20    6   16   17    7   15   11    9   16    4 |    22  ---   27   25   31   28   31   25   32   34    26
  28  |    6   18    6   25   14    5   21    8    8   46    5 |    19  ---   20   32   27   21   31   21   23   46    20
 X29  |    6   18   10   21   40    5   19   11   13  ---    5 |    26  ---   27   32   42   29   34   28   27  ---    27
 X30  |    8   14    7   18   18    7  ---    8   12  ---    4 |    23  ---   24   24   31   25  ---   25   26  ---    23
  31  |    4   20    7   14   22    4   17   14   15   13    4 |    24  ---   29   26   36   27   29   26   27   26    25
  32  |    6   16   10    9   19    5   12    6   10   19    3 |    15  ---   22   18   26   18   21   15   25   24    19
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   20    7   16   19    5   18    9   10   20      |T   21  ---   24   25   29   25   29   22   27   26    23
 WRMS |    7   20    7   15   17    5   18    9    8   22      |NE  21  ---   24   25   29   25   29   22   27   26    23
 MEDI |    7   18    7   14   17    5   18    8   10   17      |MD  19  ---   23   25   29   23   29   21   25   24    22

Table 3.1601.4   GPS week: 1601   Day: 4   MJD: 55455.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   29   54  ---   33  ---   67  ---   16   44  ---   17 |    32  ---  ---   55  ---   96  ---   27   66  ---    39
   2  |    5   23    8   10   17    3   21   10    7   17    4 |    11  ---   15   12   23   11   25   11   16   19    11
   3  |    5   15    6   17   14    3   14    6    9   22    3 |    11  ---   16   13   19   13   23   11   18   25    13
   4  |    5   17   10   10   12    4   15    7   11   19    3 |    34  ---   33   37   31   35   36   39   42   33    36
   5  |    5   17    8   13   16    5   18    8   10   20    4 |    21  ---   26   25   29   19   27   20   26   19    22
   6  |    6   17    7   11   14    3   18    5    9   19    3 |    13  ---   18   15   22   14   29   13   22   24    16
   7  |   14   20    7   10   24    7   25    9    8   16    4 |    17  ---   15   14   30   13   23   11   17   13    11
   8  |    7   16    6   10   14    5   16   10    6   18    3 |     9  ---   14   14   18   12   19   12   17   14    10
   9  |    8   19    9   14   13    3   16   12    8   23    4 |    11  ---   18   16   16   13   21   16   25   25    14
  10  |    5   16    5   10   13    5   16    7   10   13    3 |    18  ---   20   23   24   18   24   21   23   15    19
  11E |    5   20    6    7   15    4   22   11    9   10    3 |    22  ---   24   22   29   23   33   24   25   19    23
  12  |    6   16    9   28   14    5   19   11    8   21    5 |    14  ---   18   28   23   14   28   16   20   16    14
  13  |    7   21    7   10   23    3   25    9    9   17    4 |    14  ---   19   21   30   15   29   15   20   24    15
  14  |    5   18    8   13   13    5   25    6    7   14    3 |    13  ---   16   19   24   14   27   14   19   18    14
  15  |    8   25   10   14   15    3   32    7   14   16    5 |    14  ---   22   21   25   17   31   18   27   23    18
  16  |    6   24   10   12   18    5   23   10   10   31    5 |    21  ---   22   20   29   19   34   20   27   18    20
  17  |    7   24    6    9   20    4   24    8    7   17    4 |    16  ---   18   15   27   18   31   19   29   26    19
  18  |    6   19    7   15   13    5   23    5    6   30    4 |    12  ---   22   21   20   14   25   14   23   23    16
  19  |    6   23    7   10   20    4   24    6   10   18    4 |    15  ---   18   12   29   15   29   13   20   19    15
  20  |    4   20    6   10   16    3   22    8    7   12    3 |    22  ---   30   24   30   22   30   25   24   21    23
  21  |    7   20    9   16   20    5   23   14    7   14    4 |    17  ---   18   13   28   15   32   24   22   21    16
  22  |    6   18    9   12   11    5   21   12    5   29    4 |    15  ---   25   23   23   18   26   21   26   25    19
  23  |    6   24    8    8   20    4   28    8    6   21    4 |    14  ---   20   16   27   15   31   14   17   23    15
  24  |    5   15    9    9   11    3   14    9    6   20    3 |    14  ---   20   17   17   14   26   13   18   22    15
 X25  |   29  ---   15   14  ---    9  ---   20   14  ---   10 |    29  ---   25   21  ---   24  ---   22   26  ---    22
  26  |    7   16    9    9   10    3   12   10   12   15    3 |    11  ---   17   13   18   11   19   13   22   15    13
  27  |    7   19   10   11   14    3   17   12    7   19    4 |    16  ---   19   16   24   16   26   15   23   22    16
  28  |    8   19    8   13   15    7   27    8    9   47    5 |    13  ---   24   21   24   18   28   19   21   44    17
 X29  |    6   22    7   13   38    5   21    9    9  ---    5 |    20  ---   20   19   37   19   28   16   24  ---    19
  30  |    6   12    5   14   17    4   10    8    9    9    3 |    21  ---   20   16   25   17   24   20   25   21    18
  31  |    6   17    8   12   23    5   16    9    9   13    4 |    17  ---   18   16   33   17   23   14   18   18    14
  32  |    5   17    7    8   17    5   13    7    9   19    3 |    13  ---   24   18   20   17   19   15   18   25    16
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    8   12   16    4   21    9    9   21      |T   16  ---   20   19   25   19   26   17   23   21    17
 WRMS |    7   19    7   11   15    4   21    8    7   24      |NE  16  ---   20   19   25   19   26   17   23   21    17
 MEDI |    6   19    8   11   15    4   21    9    9   18      |MD  15  ---   20   18   24   16   27   16   22   21    16

Table 3.1601.5   GPS week: 1601   Day: 5   MJD: 55456.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   50  ---  ---   51  ---   38  ---   33   24  ---   24 |    41  ---  ---   35  ---   43  ---   30   35  ---    22
   2  |    5   21    7    9   21    7   21   10   11   21    4 |     9  ---   14   10   27   11   23   12   17   19    11
   3  |    7   16    5   13   13    3   13    8    9   22    3 |    11  ---   14   15   14   11   22   10   17   24    11
   4  |    6   19    7    7   11    5   13    8   14   20    3 |    44  ---   42   42   35   41   35   42   46   37    40
   5  |    5   17    5   10   17    6   21   10   10   20    4 |    19  ---   24   24   31   19   28   20   25   16    21
   6  |   10   17    6   14   10    3   14    8    8   20    3 |    15  ---   16   20   17   15   25   13   19   24    16
   7  |   15   23    9   10   21    4   22    9   11   17    5 |    13  ---   16   13   27   10   20   13   14   14    10
   8  |    7   14    9   12   17    2   12   13   14   19    4 |    10  ---   14   12   14   11   18   12   13   17    10
   9  |    7   17    5    8   12    5   16   15    8   24    4 |    15  ---   15   18   20   14   23   13   21   28    15
  10  |    5   16    5   10   14    5   12   10   14   14    3 |    17  ---   22   22   25   19   16   21   22   16    18
  11E |    5   18    7   10   16    4   19    7    9   11    3 |    21  ---   25   18   29   22   30   22   21   18    20
  12  |    6   15    7   13   13    6   19   10    9   25    4 |    14  ---   20   23   22   18   28   18   21   22    17
  13  |    8   20    7    9   23    4   21    9    9   20    4 |    13  ---   15   15   32   13   26   13   18   22    13
  14  |    6   24   10   15   16    4   25    6   15   15    4 |    10  ---   15   21   22   11   24   13   21   16    12
  15  |    6   25    8   13   16    4   29   13   13   15    5 |    19  ---   21   23   28   18   31   18   23   24    19
  16  |    9   23    8   18   16    3   21   10   10   30    5 |    19  ---   19   26   22   18   29   17   22   17    19
  17  |    6   17    5   10   16    4   21    8    9   19    3 |    18  ---   19   22   24   18   26   20   26   30    19
  18  |    6   18    6   19   10    5   21    7   12   32    4 |     9  ---   12   23   20   11   22   13   20   22    12
  19  |    7   22    6   11   16    3   22    7    9   18    4 |    13  ---   17   17   26   15   27   13   15   17    15
  20  |    6   18    5   13   16    4   19    7   10   12    3 |    16  ---   21   23   26   18   24   17   21   13    18
  21  |   14   21    8   18   21    6   21   15   11   14    5 |    17  ---   12   13   26   11   24   21   19   15    11
  22  |    6   17    7   14    9    4   19   11   10   30    4 |    15  ---   17   22   23   16   24   18   18   24    16
  23  |    8   25   10   11   20    5   23   11    7   23    5 |    15  ---   20   19   29   17   29   18   17   23    16
  24  |    7   14    7   11   14    5   13   11   13   20    4 |    12  ---   18   17   18   14   21   13   16   20    15
 X25  |   30  ---   14   19  ---   10  ---   22   15  ---   10 |    14  ---   20   27  ---   16  ---   17   19  ---    14
  26  |    6   14    7    9   12    3   12   12    8   15    3 |    12  ---   14   16   18   13   16   13   13   14    11
  27  |    7   19    5   11   13    5   16   17    7   22    4 |    21  ---   21   23   27   22   30   22   26   32    23
  28  |    8   19    7   17   15    4   23   10    8   49    5 |    15  ---   20   25   25   19   28   22   18   49    17
 X29  |    7   23    7   12   31    6   21    9    8  ---    5 |    27  ---   25   27   36   25   32   24   26  ---    24
  30  |    7   10    9   19   13    4   10   11    9   11    3 |    13  ---   15   29   25   14   16   19   16   16    14
  31  |    6   17    8   15   20    4   15   11   12   13    4 |    16  ---   17   21   28   17   22   14   22   19    16
  32  |    8   20    8   12   18    3   15    9    9   22    4 |    10  ---   18   17   20   13   16   11   16   24    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   19    7   13   16    4   19   10   10   22      |T   16  ---   18   21   24   17   24   17   20   21    16
 WRMS |    8   19    7   12   17    4   19   10    9   20      |NE  16  ---   18   21   24   17   24   17   20   21    16
 MEDI |    7   18    7   12   16    4   19   10   10   20      |MD  15  ---   18   21   25   16   24   17   19   20    16

Table 3.1601.6   GPS week: 1601   Day: 6   MJD: 55457.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
  X1  |   56  ---  ---   57  ---   48  ---   70   55  ---   34 |    25  ---  ---   59  ---   39  ---   99   63  ---    51
   2  |    7   20    9   13   22    6   18    9    9   22    4 |    14  ---   20   17   28   12   23   14   22   25    16
   3  |    7   13    7   15   14    6   16    7    8   24    4 |    10  ---   15   10   16   12   21   13   18   24    11
   4  |    8   16   10   10   15    5   11   20   12   19    4 |    38  ---   38   37   30   38   33   49   40   32    36
   5  |    7   14    9   21   19    6   21   13   10   20    4 |    23  ---   26   29   38   23   29   27   28   22    24
   6  |    8   12    5   12   13    5   14    8    9   21    3 |    13  ---   16   14   20   13   23   18   16   21    13
   7  |   13   24    7   14   21    3   20    9    7   19    5 |    16  ---   17   18   28   14   22   14   20   15    13
   8  |    8   15    8   13   22    2   15   11    8   20    4 |    11  ---   15   11   19   11   19   13   18   18    11
   9  |    9   21    6   14   10    5   15   20   13   23    5 |    13  ---   16   21   17   13   22   17   23   25    14
  10  |    5   11    6    8   15    4   12   11   10   12    3 |    22  ---   25   25   29   23   20   25   28   23    23
  11E |    6   19    9   11   16    4   20   12    8   13    4 |    27  ---   32   28   31   27   36   29   29   24    27
  12  |    7   14   10   15   14    4   21   15   10   23    4 |    16  ---   23   25   23   20   27   23   26   25    20
  13  |    5   21    8   14   25    2   22    9    7   22    4 |    17  ---   19   19   35   16   30   16   19   24    16
  14  |    5   19    9   12   19    5   23   10   10   17    4 |    13  ---   16   18   25   14   26   19   25   20    15
  15  |    9   26    7   18   18    5   28   16   11   17    5 |    18  ---   20   27   29   18   29   19   22   21    18
  16  |    9   18   13   16   18    4   22   10   10   32    5 |    20  ---   26   24   26   21   30   22   26   22    21
  17  |    7   22   10   15   17    4   21   12   13   19    5 |    22  ---   19   19   25   21   33   28   27   34    21
  18  |    7   17    7   18   15    6   21    8   13   35    5 |    13  ---   22   26   22   17   24   19   27   28    18
  19  |    5   22    7   11   17    3   23    7    7   21    4 |    18  ---   19   15   27   18   33   17   21   24    19
  20  |    4   21   10   16   16    2   21    7   11   15    4 |    22  ---   29   29   34   23   26   21   31   19    24
  21  |   12   22    9   21   23    7   24   15    9   17    5 |    18  ---   16   15   30   12   32   22   22   21    17
  22  |    7   15    9   13   11    5   20   16   13   31    5 |    19  ---   27   30   30   26   26   28   34   28    24
  23  |    6   25   11   13   20    2   24   10    6   25    5 |    17  ---   20   20   31   17   31   19   20   26    17
  24  |    7   16   11   11   14    4   14   14    9   22    4 |    12  ---   14   17   16   12   24   15   16   21    11
 X25  |   30  ---   18   25  ---    8  ---   26   14  ---   12 |    18  ---   22   24  ---   15  ---   26   23  ---    13
  26  |    6   13    7   11   16    4   13   13    7   15    3 |    18  ---   23   20   26   17   22   19   26   16    20
  27  |    8   19    8   14   10    6   17   21   14   22    5 |    23  ---   26   31   27   25   29   29   38   35    27
  28  |    7   17    8   26   17    6   23   11    9   51    6 |    19  ---   20   35   27   18   28   26   22   52    20
 X29  |    7   17    7   21   32    6   22    7   10  ---    5 |    25  ---   22   24   39   29   36   24   25  ---    23
  30  |    7   12    7   18   14    4   12   11   10    8    3 |    23  ---   25   26   30   21   21   27   29   20    23
  31  |    6   19    8   14   21    7   16   10   12   13    4 |    16  ---   19   20   29   19   23   19   27   24    19
  32  |    5   18    8   12   16    4   15    9    7   22    4 |    14  ---   20   20   27   16   17   13   23   25    17
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    7   18    8   15   17    5   19   12   10   23      |T   18  ---   21   23   27   19   26   24   26   24    20
 WRMS |    7   18    8   16   18    5   19   12    8   22      |NE  18  ---   21   23   27   19   26   23   25   24    19
 MEDI |    7   18    8   14   16    5   20   11   10   21      |MD  18  ---   20   21   27   18   26   19   25   24    19



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 4.1601   GPS week: 1601   MJD: 55451.0-55457.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3043 |U    9     9    24 |U    6     8    25 |U    8     8    19 |
emr | emr 2917 |U   10    10    30 |U    7     8    29 |     9     9    21 |
esa | esa 2976 |    10    10    29 |U    6     8    25 |     8     8    20 |
gfz | gfz 3069 |U    9     9    25 |U    7     8    27 |U    8     7    19 |
grg | grg 2880 |    10    11    32 |U    6     6    25 |    11    11    23 |
igr | igr 2982 |    10    10    27 |     6     7    26 |     8     8    19 |
igs | igs 2983 |    10     9    27 |     6     7    25 |     8     7    18 |
jpl | jpl 2864 |U   10    11    31 |     7     9    30 |U    9     8    20 |
mit | mit 3058 |U    9     8    26 |U    7     9    28 |U    8     8    19 |



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 5.1601.0   GPS week: 1601   Day: 0   MJD: 55451.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3057 |     9    13    29 |     5     6    19 |  ----  ----  ---- |
emr | emr 2880 |    14    13    40 |     5     8    23 |  ----  ----  ---- |
esa | esa 2976 |    12    15    42 |     5     7    18 |  ----  ----  ---- |
gfz | gfz 3072 |     9    13    34 |     4     5    19 |  ----  ----  ---- |
grg | grg 2880 |    14    18    42 |     6     7    25 |  ----  ----  ---- |
igr | igr 2976 |    12    15    41 |     5     6    20 |  ----  ----  ---- |
igs | igs 2976 |    12    15    41 |     5     7    19 |  ----  ----  ---- |
jpl | jpl 2876 |    12    15    41 |     6     8    26 |  ----  ----  ---- |
mit | mit 3072 |     9    12    31 |     5     9    27 |  ----  ----  ---- |

Table 5.1601.1   GPS week: 1601   Day: 1   MJD: 55452.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3050 |     7     6    18 |     4     5    20 |  ----  ----  ---- |
emr | emr 2880 |     9     7    22 |     6     6    21 |  ----  ----  ---- |
esa | esa 2976 |     9     6    20 |     4     6    18 |  ----  ----  ---- |
gfz | gfz 3068 |     8     6    19 |     5     7    23 |  ----  ----  ---- |
grg | grg 2880 |     9     6    20 |     5     5    23 |  ----  ----  ---- |
igr | igr 2976 |     9     6    20 |     5     6    19 |  ----  ----  ---- |
igs | igs 2976 |     8     6    19 |     4     5    19 |  ----  ----  ---- |
jpl | jpl 2870 |     8     9    21 |     6     6    22 |  ----  ----  ---- |
mit | mit 2976 |     9     6    20 |     4     5    17 |  ----  ----  ---- |

Table 5.1601.2   GPS week: 1601   Day: 2   MJD: 55453.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3046 |    12     9    32 |     5     6    22 |    12    11    19 |
emr | emr 2972 |    12    11    41 |     6     6    28 |    12    10    22 |
esa | esa 2976 |    14    10    33 |     4     6    22 |    11    10    21 |
gfz | gfz 3068 |    12    10    31 |     5     5    26 |    11    10    21 |
grg | grg 2880 |    13    12    33 |     6     7    27 |    10    11    21 |
igr | igr 2976 |    13     9    31 |     5     4    22 |    10    10    19 |
igs | igs 2976 |    13     9    33 |     5     5    22 |    10    10    20 |
jpl | jpl 2880 |    13    12    39 |     5     7    27 |    11     9    24 |
mit | mit 3072 |    14     9    36 |     5     6    22 |    11    11    22 |

Table 5.1601.3   GPS week: 1601   Day: 3   MJD: 55454.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3039 |     9    12    27 |     5     7    25 |     7     5    18 |
emr | emr 2963 |    10    15    26 |     6     8    22 |     7     7    19 |
esa | esa 2976 |    11    15    31 |     5     7    22 |     7     6    18 |
gfz | gfz 3069 |     9    13    25 |     7     6    25 |     7     5    18 |
grg | grg 2880 |    10    11    28 |  ----  ----  ---- |  ----  ----  ---- |
igr | igr 3018 |     9    15    26 |     6     6    22 |     7     8    18 |
igs | igs 2976 |    10    14    30 |     5     6    22 |     6     5    17 |
jpl | jpl 2784 |     9    16    33 |     6     8    27 |     7     6    20 |
mit | mit 3072 |     8    11    29 |     6     6    20 |     7     6    16 |

Table 5.1601.4   GPS week: 1601   Day: 4   MJD: 55455.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3050 |     7     7    25 |     6     8    18 |     8     7    19 |
emr | emr 2969 |    10    10    29 |     7     6    26 |     9     9    17 |
esa | esa 2976 |     9     8    30 |     5     7    19 |     9     8    18 |
gfz | gfz 3070 |     8     8    26 |     6     8    20 |     8     8    18 |
grg | grg 2880 |     0     0     0 |  ----  ----  ---- |  ----  ----  ---- |
igr | igr 2976 |     8     9    28 |     5     5    20 |     8     7    18 |
igs | igs 2976 |     8     8    27 |     6     6    19 |     8     7    17 |
jpl | jpl 2880 |     8     9    31 |     6     7    26 |    10     9    18 |
mit | mit 3072 |     8     7    25 |     7    13    30 |     9     8    19 |

Table 5.1601.5   GPS week: 1601   Day: 5   MJD: 55456.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3031 |     8     7    23 |    11    16    54 |     6     7    22 |
emr | emr 2880 |     9     8    28 |     9    15    54 |     7     8    24 |
esa | esa 2976 |     9     8    25 |    10    15    52 |     6     8    23 |
gfz | gfz 3072 |     8     7    22 |    11    15    53 |     6     6    20 |
grg | grg 2880 |    15    16    53 |  ----  ----  ---- |    12    12    24 |
igr | igr 2976 |     9     7    25 |    11    15    54 |     6     6    21 |
igs | igs 2976 |     9     7    24 |    10    15    54 |     6     6    20 |
jpl | jpl 2879 |     9     7    26 |    13    17    59 |     7     6    23 |
mit | mit 3072 |     9     7    22 |    14    15    64 |     6     8    21 |

Table 5.1601.6   GPS week: 1601   Day: 6   MJD: 55457.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3032 |     8     7    18 |     7     8    22 |     8     9    18 |
emr | emr 2880 |     9    10    28 |     7     9    28 |     9     9    21 |
esa | esa 2976 |    10     9    20 |     6     7    22 |     9     9    19 |
gfz | gfz 3068 |     8     8    19 |     8     8    22 |     8     7    18 |
grg | grg 2880 |    11    17    46 |  ----  ----  ---- |  ----  ----  ---- |
igr | igr 2976 |     9     8    19 |     8     8    23 |     8     8    17 |
igs | igs 3026 |     8     8    18 |     7     7    22 |     8     9    17 |
jpl | jpl 2880 |    10    10    26 |     8     8    26 |     8     7    18 |
mit | mit 3072 |     8     7    18 |     8     8    17 |     9     9    15 |


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 6.1601   GPS week: 1601   MJD: 55451.500-55457.500

                                                         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 |     -11     -12      43      11      7 |      11     21
            |      14      16     132      99      6 |       5
emr   uuuuu |      20      81      99     209     -7 |      70     73
            |      23      18      83     117      7 |       3
esa   uuuuu |     -19     -36      82     101     -4 |      25     31
            |      23      12      34      66      6 |       4
gfz   uuuuu |       3      36     -36     -66     -1 |       8     17
            |      29      20      65      46      5 |       2
grg   uuuux |     -60       1     -57     -99     11 |       1     30
            |      30      21      90      54     18 |       5
igr   xxxxx |      21      35      34      75     -2 |       6     17
            |      19      26      77      41      5 |       3
irf   xxxxx |      12       5     -88     -81      4 |       4     21
            |      12      16      52     104     11 |       4
jpl   uuuuu |      22     -29      35     183      4 |      18     26
            |      49      28      80     114      9 |       4
mit   uuuuu |      12      -4    -207    -110      6 |      18     28
            |      18      23      59     126     10 |       5
ngs   uuuuu |     -15      23      46     -75     -8 |      14     21
            |      35      46      38     155      9 |       3
sio   uuuuu |     101     -54     101    -138     14 |      23     32
            |       8      19      99     172     16 |       5


Table 7.1601.0   GPS week: 1601   Day: 0   MJD: 55451.500

                                                         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 |     -25     -29      61     -69      0 |       7     21
emr   uuuuu |      39     110       4     272     -9 |      70     74
esa   uuuuu |     -12     -31     133      96      0 |      21     31
gfz   uuuuu |       2      39      64     -69     -6 |       8     21
grg   uuuux |     -27     -30     -45    -165     22 |       5     53
igr   xxxxx |       9      65    -113      73      5 |       3     20
irf   xxxxx |     -12       2    -165    -243    -17 |       2     23
jpl   uuuuu |     -50     -41     -37     218     15 |      13     23
mit   uuuuu |     -26      -1    -274    -321    -14 |      15     29
ngs   uuuuu |      23      20      18      74     10 |      11     21
sio   uuuuu |     100     -61     -98    -272    -18 |      20     31

Table 7.1601.1   GPS week: 1601   Day: 1   MJD: 55452.500

                                                         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 |     -27      -4     192     -20     10 |       5     20
emr   uuuuu |      47     102      17     397     -5 |      69     72
esa   uuuuu |     -47     -30      77     167     -4 |      20     30
gfz   uuuuu |     -54       0       6      14     -4 |       5     18
grg   uuuux |     -58      29     -51     -53     -5 |      -6     33
igr   xxxxx |      16      73      45      70     -6 |       2     19
irf   xxxxx |       6      -8     -16    -190     -1 |      -2     23
jpl   uuuuu |     107     -50     -46     402     11 |      13     23
mit   uuuuu |       9     -14    -105    -210      0 |      11     27
ngs   uuuuu |      31      42      -1    -180     -6 |      11     21
sio   uuuuu |      91     -65     137    -421      6 |      16     28

Table 7.1601.2   GPS week: 1601   Day: 2   MJD: 55453.500

                                                         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 |     -23       1     146     180     15 |       9     24
emr   uuuuu |      40      74     174     286    -14 |      72     75
esa   uuuuu |     -19     -32      64     122    -14 |      25     33
gfz   uuuuu |       9      27       0    -102     -8 |       7     20
grg   uuuux |    -112      -4     -43    -185     23 |      -7     32
igr   xxxxx |       7      43     122     113     -5 |       5     20
irf   xxxxx |      13      25     -84    -120      9 |       1     24
jpl   uuuuu |      54     -21      71     120     12 |      18     27
mit   uuuuu |      20      26    -208    -171     12 |      15     29
ngs   uuuuu |     -30     -21      35      80     -7 |      15     23
sio   uuuuu |      91     -30      66    -223     18 |      19     31

Table 7.1601.3   GPS week: 1601   Day: 3   MJD: 55454.500

                                                         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 |      -3      -1    -202      56      5 |      14     23
emr   uuuuu |      23      74     213     123    -17 |      73     76
esa   uuuuu |     -23     -20      23     -22      1 |      27     33
gfz   uuuuu |      33      65     -76     -62      0 |       9     17
grg   uuuux |     -81       1     -30     -96    -17 |      -1     28
igr   xxxxx |      48      17      88     126      5 |       8     17
irf   xxxxx |      25      27     -97     -31     12 |       5     21
jpl   uuuuu |      13       9     133     231      5 |      21     28
mit   uuuuu |      31      22    -231     -63     13 |      20     29
ngs   uuuuu |     -40     -57     110      47    -20 |      17     22
sio   uuuuu |     109     -27      99     -85     25 |      23     32

Table 7.1601.4   GPS week: 1601   Day: 4   MJD: 55455.500

                                                         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 |       5       0      43     -94      6 |      17     24
emr   uuuuu |      -4      58     147      49     -5 |      74     77
esa   uuuuu |     -48     -46      83      57     -2 |      31     34
gfz   uuuuu |      15      43     -65     -46      1 |      12     17
grg   uuuux |     -36      25    -253     -69      0 |       4     21
igr   xxxxx |      11      19      40      74     -3 |      12     17
irf   xxxxx |      13      -2     -31      -6     14 |      10     21
jpl   uuuuu |      16     -46      73     131     -6 |      25     30
mit   uuuuu |      16     -16    -151     -22     13 |      24     31
ngs   uuuuu |      10      43      56     -49    -13 |      18     21
sio   uuuuu |     103     -69     216       1     30 |      28     36

Table 7.1601.5   GPS week: 1601   Day: 5   MJD: 55456.500

                                                         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 |       6     -16     103      85     12 |      14     20
emr   uuuuu |       2      77      33     169      2 |      69     72
esa   uuuuu |       4     -55      91     165     -2 |      28     31
gfz   uuuuu |      25      30     -45     -69      3 |       9     14
grg   uuuux |     -67      -7      12     -64     26 |       4     21
igr   xxxxx |      51      22      67      70     -3 |       9     15
irf   xxxxx |      19       4     -92       6     11 |       7     18
jpl   uuuuu |      22       6     -58     119     -5 |      21     27
mit   uuuuu |      19      -5    -221       2      8 |      22     28
ngs   uuuuu |     -56      56      78    -319    -12 |      15     19
sio   uuuuu |     103     -59     156      -7     23 |      27     35

Table 7.1601.6   GPS week: 1601   Day: 6   MJD: 55457.500

                                                         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 |      -7     -38     -42     -59      0 |      13     18
emr   uuuuu |      -7      73     103     166      1 |      66     68
esa   uuuuu |      13     -38     103     120    -10 |      23     26
gfz   uuuuu |     -10      49    -134    -132      4 |       7     12
grg   uuuux |     -36     -10      12     -63     28 |       5     21
igr   xxxxx |       8       4     -11      -2     -5 |       6     12
irf   xxxxx |      21     -17    -129      15      5 |       5     16
jpl   uuuuu |      -5     -64     109      59     -5 |      18     23
mit   uuuuu |      17     -39    -256      13      6 |      20     25
ngs   uuuuu |     -40      76      27    -180     -9 |      11     17
sio   uuuuu |     111     -72     131      42     14 |      26     34



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