[IGSREPORT-19447] Wk 1620 IGS Final Orbits

Jim Ray igs.acc at noaa.gov
Thu Feb 10 05:01:26 PST 2011


Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1620   (Jan 23, 2011 - Jan 29, 2011)

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:

igs1620[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1620[0-6].clk  IGS GPS satellite and station clocks in clock RINEX format.
igs1620[0-6].cls  IGS GPS clock combination summary report.
igs16207.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs16207.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  |  COD   | CAS1 RAMO XMIS
                0  |  EMR   | 26 3 WTZR HARB WTZR
                0  |  ESA   | 13 13 COCO KERG NRMD
                0  |  GFZ   | 3 14 15 23 MDVJ NICO
                0  |  GRG   | ADIS AMC2 CAS1
                0  |  JPL   | 13
                0  |  MIT   | 3 26 30 3 30
                1  |  EMR   | 3 26 3 26 WTZR WTZR
                1  |  ESA   | DAV1 KERG
                1  |  GFZ   | 3 13 14 15 23 26 DAV1 MDVJ
                1  |  GRG   | ADIS
                1  |  JPL   | 3 26 HARB
                1  |  MIT   | 3 19 21 22 26 28 3 19 21 22 26 28 MAW1
                2  |  COD   | CAS1 RAMO
                2  |  EMR   | 26 3 26 WTZR WILL WTZR
                2  |  ESA   | DAV1 DAV1 UNSA
                2  |  GFZ   | 3 13 14 15 23 26 KIRU MAW1 MDVJ WILL
                2  |  GRG   | ADIS NRC1
                2  |  JPL   | 26 DAV1
                2  |  MIT   | 26 3 6 9 26
                3  |  ALL   | 26
                3  |  COD   | DAV1
                3  |  EMR   | 3 3 WTZR WTZR
                3  |  GFZ   | 3 13 14 15 23 24 DGAV IRKT MDVJ
                3  |  GRG   | ADIS DAV1 HOB2
                3  |  JPL   | KOUC
                3  |  MIT   | 3 6 24 3 6 24 DAV1 KOUC MDVJ
                4  |  COD   | DAV1
                4  |  EMR   | 3 6 26 3 6 10 26 WTZR WTZR
                4  |  ESA   | 21 10 21 RAMO UNSA
                4  |  GFZ   | 3 13 14 15 21 23 26 ALIC AUCK CAS1 COCO CONZ HARB
                4  |  GFZ   | WHIT
                4  |  JPL   | 21 26
                4  |  MIT   | 3 6 23 26 28 3 6 23 26 28 MAW1 MAW1 USN3
                5  |  EMR   | 3 6 26 3 6 26 WTZR HARB WTZR
                5  |  ESA   | 21 MATE NURK UNSA
                5  |  GFZ   | 3 13 14 15 23 26 BRUS CAS1 MDVJ
                5  |  GRG   | NRC1
                5  |  JPL   | 26 MDVJ
                5  |  MIT   | 3 6 26 30 3 6 26 30 32
                6  |  COD   | DAV1 RAMO
                6  |  EMR   | 3 6 26 3 6 26 WTZR WTZR
                6  |  ESA   | 30 30 DAV1
                6  |  GFZ   | 3 13 14 15 24 26 MDVJ
                6  |  GRG   | ADIS DAV1
                6  |  JPL   | 26
                6  |  MIT   | 3 6 8 26 30 30 DAV1 SYOG

    
 5. New clock offsets and drifts were estimated for centres showing reference
    clock resets.  Note that only the largest clock offset and drift are output
    to the summary file.  However, the clock combination and the listed RMS
    include all the clock segments.  In summary, the following clock
    shifts/resets were noticed and accounted for:
    
               Day | Centre |  Time  |  Jump
               ----+--------+--------+-------------
                6  |  MIT   | ~01:25 | ~ -0.07 ns

 6. The following table lists all maneuvered satellites for this week.
    The solutions from COD and ESA, which modeled the maneuver, are used
    that day for combination. An associated accuracy code of 0 (unknown) 
    is given if only one AC is left (no redundancy). For the long arc  
    evaluation the arc is split into two parts at the given maneuver epoch.
    
               PRN |    Date    | Ref. NANU
               ----+------------+----------
               G12 | 2011_01_26 | 2011011 

 7. 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 G06 |    |    |    |  1 |    |    |    |

 8. 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.

 9. 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  |    -.6    1.1    1.2       4     22    -31     .15
       EMR  |   -1.7     .2    2.4      39      0     -3     .35
       ESA  |    1.1    9.5    -.9     120    -13    -49     .02
       GFZ  |     .2    1.5     .6      17      0    -32     .09
       GRG  |    -.7    8.7  -11.4      28     44   -107     .12
       JPL  |    1.5    4.3    7.7      59    -52     70     .03
       MIT  |    3.0     .3  -12.0      24    -17    -46     .30
       NGS  |    4.3    3.1   -6.4      54   -108      5    -.03
       SIO  |    3.9    3.2    1.0      50    -34    -17     .42


10. 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.

11. 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.

12. 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 1.1620.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1620.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 2.1620.[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 3.1620.[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 5.1620.0-6).

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 1620 summary.                       (Jan 23, 2011 - Jan 29, 2011)

Table 1.1620.a   GPS week: 1620   MJD: 55584.000-55590.000

         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  235|    0     0     6    62   -82   -16  -.20    9    8 |    -146    -629     17     79
        |    0     0     2    18    24    21   .03           |     367     536
emr   89|    0    -1     6    -4   -67    -3   .45   19   19 |    -647     301     15    113
        |    2     1     2    26    31    21   .05           |     822     813
esa  135|    0     0     0   -86   -33   -12   .21    9    9 |   -1029     192     15    111
        |    1     0     2    25    28    13   .04           |    1058    1518
gfz  190|    0     0    -5    52    27    14  -.17   11   10 |     160     -46     21     96
        |    0     1     1    70    73     9   .03           |     279     424
grg  136|    0     0   -13     8  -134   -51   .67   17   15 |   63061  -96804     47    214
        |    1     0     2    26    22     6   .03           |  160922  219032
igr  n/a|    0     0     1    68   -23    21  -.03    5    5 |    8058     646     16     68
        |    0     0     1    25    41    28   .03           |    1778     758
jpl  140|    1    -1    11   -45    71    15   .46   19   19 |    1945     443     18     89
        |    1     1     1    27    25    26   .05           |    1008     659
mit  257|    1    -1    -6    53    -4     0  -.33   13   12 |    -189      67     23    140
        |    0     0     0    37    26     8   .07           |     257     308
ngs  217|    0     0    -1   -22   163    21  -.26   10    8 | -234952  352969   2235   3797
        |    0     0     1    44    42     6   .03           |  266661  353139
sio  259|    0     0     9   -53    16     5  -.16   19   18 |     ---     ---    ---    ---
        |    1     1     1    35    37    15   .05           |     ---     ---


Table 1.1620.b   GPS week : 1620   MJD: 55584.000-55590.000   

         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  |    0    0    0    0    0    0    0 |
   2  |    5    5    5    5    9    5    5 |
   3  |    6    5    5    4    5    5    5 |
   4  |    4    4    3    4    5    4    4 |
   5  |    5    5    5    5    5    5    5 |
   6  |    5    5    7    6    6    6    6 |
   7  |    5    5    4    4    5    5    5 |
   8  |    4    4    3    3    3    3    3 |
   9  |    4    4    3    4    4    4    3 |
  10  |    4    3    4    3    5    5    3 |
  11  |    4    4    4    4    4    4    4 |
  12  |    5    5    5   15    6    5    5 |
  13  |    7    5    4    4    4    5    4 |
  14  |    5    4    4    4    4    5    4 |
  15  |    4    5    5    5    5    5    5 |
  16  |    5    5    5    5    5    5    5 |
  17  |    4    4    4    4    5    5    5 |
  18  |    5    5    5    5    5    4    5 |
  19  |    5    5    5    5    5    5    5 |
  20  |    5    5    5    4    5    5    5 |
  21  |    5    5    5    4    5    9    5 |
  22  |    5    4    4    4    4    4    4 |
  23  |    5    5    5    5    5    5    5 |
  24  |    5    4    4    6    4    4    5 |
  25  |    6    6    5    5    6    6    5 |
  26  |    8    5    5    5    7    5    6 |
  27  |    4    4    4    4    5    4    4 |
  28  |    4    4    4    4    5    5    5 |
  29  |    5    5    5    5    5    5    5 |
  30  |    5    4    4    5    4    4    5 |
  31  |    5    4    5    5    4    4    5 |
  32  |    5    4    4    4    5    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 2.1620.0   GPS week: 1620   Day: 0   MJD: 55584.000                            

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  235|    0     1     3    49   -60    -7  -.17    8    7 |     170    -994     16     79
        |                     25    29                       |
emr   89|    1    -4    11    30   -35    11   .50   21   21 |   -1047    -858     16    124
        |                    -66    -6                       |
esa  135|    3     1     0  -114   -26   -12   .22   11   10 |    -861     727     18    119
        |                    -30    -3                       |
gfz  190|   -1     0    -5    98   -30     5  -.17   12   11 |     359    -411     24    102
        |                    -31    11                       |
grg  136|    2     0   -12    15  -123   -51   .70   21   14 |     396    -506     53    191
        |                     14     5                       |
igr  n/a|    0     0     1    50   -14    24  -.03    5    5 |    5675     111     16     68
        |                    -38    10                       |
jpl  140|    0     0    11   -40    43   -17   .48   20   19 |    1049    -620     16     81
        |                    -41    27                       |
mit  257|    2    -1    -4    75    16     8  -.23   12   11 |     271    -316     19    137
        |                    -15     3                       |
ngs  217|   -1     0    -1   -90   188    24  -.25   11    7 |     304   -1127   2323   3551
        |                     37    72                       |
sio  259|    0     0    10   -58    28     0  -.16   20   17 |     ---     ---    ---    ---
        |                     26    46                       |

Table 2.1620.1   GPS week: 1620   Day: 1   MJD: 55585.000                            

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  235|    0     0     3    43   -62     5  -.18    8    7 |    -432    -278     17     86
        |                     48    16                       |
emr   89|    1    -2     7     0   -44   -33   .45   19   19 |   -2111    1460     14    112
        |                    -38     7                       |
esa  135|    0     0     3  -107     3   -14   .23    9    9 |   -1609   -1843     15    123
        |                    -11   -29                       |
gfz  190|    0     0    -5   111   -47     7  -.12   10    9 |      47    -167     21     86
        |                    -25    -9                       |
grg  136|    0     0   -16    -9  -117   -40   .66   16   14 |  -25296   76525     50    185
        |                     83   -42                       |
igr  n/a|    0     0     2    34    22     2  -.03    5    5 |    5752    1908     15     74
        |                    -25   -15                       |
jpl  140|    1     0    10   -70   103    -6   .41   19   18 |     375    1283     19     83
        |                      4   -34                       |
mit  257|    1    -1    -7   101   -34    -2  -.27   12   12 |    -405     506     24    159
        |                    -15     6                       |
ngs  217|    0     0     0   -69   199    17  -.27   10    8 |    -365    -218   1899   3638
        |                     19   -25                       |
sio  259|   -1     0     7   -24    -8    -8  -.19   19   17 |     ---     ---    ---    ---
        |                     19    56                       |

Table 2.1620.2   GPS week: 1620   Day: 2   MJD: 55586.000                            

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  235|    0     0     6    71   -96   -21  -.22   11    9 |    -225    -503     14     81
        |                    -10    47                       |
emr   89|    1    -2     7    -4   -55   -31   .45   19   19 |    -806     404     15    100
        |                    -31    16                       |
esa  135|    0     0     0   -77   -18    -1   .21    7    7 |     343    -360     13    103
        |                     11     7                       |
gfz  190|   -1    -1    -3    52   -24     7  -.16   10    9 |      55     271     21    106
        |                    -35    28                       |
grg  136|    1     0   -12    48  -150   -51   .69   15   13 |  424887 -548757     45    192
        |                     32   -12                       |
igr  n/a|    0     0     0   106   -21    -8  -.06    5    5 |    7580     925     15     77
        |                    -66     6                       |
jpl  140|    3     0    11   -36    53    50   .47   19   19 |    1545     329     19     90
        |                    -39    26                       |
mit  257|    0     0    -6    35    -6     3  -.31   12   11 |    -243     132     17    107
        |                    -16    -2                       |
ngs  217|    0     0    -2   -13   188    16  -.30    9    7 | -511903  700320   2173   3764
        |                    -44    41                       |
sio  259|    0     0     9   -48    30    -3  -.16   17   16 |     ---     ---    ---    ---
        |                     -1    51                       |

Table 2.1620.3   GPS week: 1620   Day: 3   MJD: 55587.000                            

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  235|    0     0     8    57   -52     0  -.25    9    8 |     446   -1498     16     78
        |                     81    25                       |
emr   89|   -3     0     4   -31   -43    21   .36   16   16 |      96     325     17     97
        |                     -4    24                       |
esa  135|    0     1     0   -78   -13   -37   .14    7    7 |   -1918    2853     16    103
        |                      1     5                       |
gfz  190|    0    -2    -3    91    -5    14  -.20   11   12 |     704    -620     19     93
        |                    -46    24                       |
grg  136|    0     0   -12   -35   -97   -49   .68   15   14 |     180      71     35    233
        |                    106   -50                       |
igr  n/a|    0     0     1    48    25    24  -.09    5    5 |    9026     670     17     51
        |                    -29   -12                       |
jpl  140|    3    -1     7   -73   107     8   .38   18   17 |    2575     480     18     86
        |                      8   -65                       |
mit  257|    1    -1    -7    87   -40     1  -.40   14   14 |     -16      25     25    153
        |                    -18   -16                       |
ngs  217|    0     0    -1   -24   188    34  -.24   11    9 | -452742  593770   2842   4211
        |                      1    13                       |
sio  259|   -2     2    11   -10   -54    25  -.22   20   19 |     ---     ---    ---    ---
        |                     13    68                       |

Table 2.1620.4   GPS week: 1620   Day: 4   MJD: 55588.000                            

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  235|    0     0     6    78  -115   -47  -.20   10   10 |    -209    -861     17     69
        |                    -36    64                       |
emr   89|    0    -3     6    30  -119    -4   .41   20   19 |    -865     940     14    132
        |                    -59    88                       |
esa  135|    0     0    -2   -36   -78    -8   .25    9    8 |   -1220     749     12    108
        |                    -36    46                       |
gfz  190|    0     0    -5   -97   121    28  -.18   17   11 |      90    -132     22    106
        |                    -29    26                       |
grg  136|    0     1    -9    25  -140   -63   .63   16   15 |   -3652   10335     39    252
        |                    -16    46                       |
igr  n/a|    0     0     0    73   -44    80   .01    6    5 |    8687     931     18     72
        |                    -38    53                       |
jpl  140|    1    -3    10   -15    53    50   .50   19   19 |    2132    1005     20    108
        |                    -42    15                       |
mit  257|    1    -1    -5     8     0     0  -.41   14   13 |    -476    -330     26    157
        |                     -5   -13                       |
ngs  217|    0     0    -2    35   148    21  -.27    9    8 | -579734  793231   2227   3906
        |                    -54    65                       |
sio  259|   -1     1    10  -106    57    10  -.19   18   18 |     ---     ---    ---    ---
        |                      8    21                       |

Table 2.1620.5   GPS week: 1620   Day: 5   MJD: 55589.000                            

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  235|    0     0     7    46  -102     0  -.17    9    9 |    -112    -421     17     66
        |                     52    63                       |
emr   89|    1     0     4   -35   -95     2   .51   18   18 |      34     457     17    104
        |                      5    55                       |
esa  135|    0     0    -2   -97   -61     5   .23   13   11 |     380     330     17    117
        |                    -40     8                       |
gfz  190|    0    -1    -4    64   131    11  -.16    9    9 |    -104     646     21     90
        |                    -77    67                       |
grg  136|    0     1   -16    -3  -153   -51   .65   19   18 |   45061 -215297     61    234
        |                     40    34                       |
igr  n/a|    0     0     0    69   -94    17  -.02    6    6 |    9720     512     18     61
        |                    -20    18                       |
jpl  140|    2    -2    12   -74    62    13   .52   20   20 |    2701     769     21     98
        |                      7   -26                       |
mit  257|    1     0    -5    60    36   -16  -.35   15   14 |    -130     142     24    124
        |                      8   -28                       |
ngs  217|    0     1    -3   -13    78    15  -.26   11    7 |  -99788  384881   2204   3846
        |                    -94   121                       |
sio  259|    0     1     9   -32    45   -12  -.08   18   18 |     ---     ---    ---    ---
        |                      3    21                       |

Table 2.1620.6   GPS week: 1620   Day: 6   MJD: 55590.000                            

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  235|    0     0     7    92   -89   -42  -.23   10    9 |    -662     146     26     95
        |                    -43    26                       |
emr   89|   -2     0     6   -19   -78     8   .47   17   17 |     168    -615     18    123
        |                     -2    60                       |
esa  135|    0     0    -3   -90   -41   -16   .21    8    8 |   -2321   -1109     14    110
        |                    -40    12                       |
gfz  190|    0     0    -6    48    44    27  -.16   11   10 |     -28      88     23     89
        |                    -83    57                       |
grg  136|    1     0   -15    17  -161   -50   .68   19   16 |    -149      -5     51    214
        |                     33    18                       |
igr  n/a|    0    -1     0    93   -40    11  -.00    5    5 |    9971    -535     18     76
        |                    -60     4                       |
jpl  140|    1    -1    13    -8    77    12   .49   20   20 |    3240    -141     19     78
        |                      3   -31                       |
mit  257|    0     0    -6     7    -1     8  -.32   12   11 |    -329     314     31    144
        |                      7    -6                       |
ngs  217|    0     0     0    19   154    22  -.19   10    8 |    -440     -68   1982   3668
        |                      0   102                       |
sio  259|    0     0    10   -94    14    28  -.13   19   18 |     ---     ---    ---    ---
        |                    -10    10                       |

       
       
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 3.1620.0   GPS week: 1620   Day: 0   MJD: 55584.000                            

        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  |    5  ---  ---  ---  ---   69  ---  ---  ---  ---    0 |    57  ---  ---  ---  ---   69  ---  ---  ---  ---    57
   2  |    5   17    8   18   13    6   21   12    8   31    5 |    18   30   24   29   25   21   33   19   19   19    19
   3E |   14   20   15   13   21    9   18   14   17   19    5 |   116  114  105  106  114  111  113  113  103  106   109
   4  |    6   13    7   17   17    6   12   12    8   18    4 |    26   29   31   34   43   29   28   28   34   23    28
   5  |    6   24    7   12   12    6   25    9   12   29    5 |    16   27   21   19   29   18   31   19   18   30    18
   6  |    8   19   11   10   15    6   17   13   12   18    4 |    50   57   55   57   58   55   59   60   58   53    55
   7  |    7   25   13   11   18    5   21   14   10   21    5 |    16   30   23   17   30   18   26   19   18   24    17
   8  |    6   18    7    9   11    4   12    9   10   17    3 |    21   28   24   20   28   22   27   22   18   23    22
   9  |    6   19   11    8   15    3   15   15    7   13    4 |    15   22   21   19   22   17   20   17   16   16    16
  10  |    4   17    8   10   14    5   14    9    9   19    3 |    24   26   31   28   34   28   25   27   30   26    27
  11  |    7   18    8    9   16    5   17    7   12   20    4 |    27   39   35   35   48   29   34   36   30   35    31
  12  |    8   32   11    7   18    5   25   16    9   14    5 |    12   27   15   15   19   13   24   10   18   10    14
  13E |    9   19   29   12   23    4   24   21   10   32    7 |    32   40   45   34   38   33   43   36   34   35    32
  14E |    7   18    9    9   19    6   23   13   10   15    4 |    21   26   26   25   31   22   32   21   23   23    22
  15E |    7   18    9    9   14    4   20   11    9   15    4 |    16   23   23   24   21   19   21   19   22   19    19
  16  |    4   21   12   10   16    3   21   11   16   15    4 |    14   29   19   19   27   16   30   16   27   16    16
  17  |    7   22   11    9   18    5   20    9    6    7    4 |    22   34   22   18   34   22   36   17   20   22    21
  18  |    8   26    9   12   13    4   23   12   12   21    4 |    18   34   25   23   26   23   34   22   23   27    21
  19  |    7   23   10   13   18    5   20   10   12   20    4 |    33   40   27   24   38   30   39   26   34   30    29
  20  |    7   18   10   13   12    5   17    9   14   27    4 |    20   26   23   25   27   18   26   23   21   22    19
  21  |   10   23   10   12    9    4   23   12    9   32    5 |    22   26   19   22   21   21   27   24   25   30    21
  22  |    6   19    9    8   11    5   24   13   11   22    4 |    21   30   24   24   32   21   32   25   25   25    22
  23E |    6   21   10   13   17    4   24   12    8   14    4 |    12   25   19   18   23   15   22   20   18   15    14
  24  |    9   13    8   25   14    6    9    7   18   16    5 |    17   25   25   35   33   18   24   27   28   26    23
 X25  |   17   22    8   13   19    7  ---   13    9  ---    6 |    33   36   32   31   36   32  ---   28   31  ---    30
  26E |   11   27   13   14   72    7   30   14    9   12    8 |    19   32   26   25   65   24   33   25   30   19    23
  27  |    7   18    8   10   15    4   13   10    7   17    3 |    13   23   22   21   23   17   23   16   19   24    18
  28  |    7   24   11    7   20    3   16    9    8   18    4 |    16   30   19   17   33   16   26   19   16   16    16
  29  |   10   23    9   10   16    4   23   10    6   21    4 |    26   35   28   25   30   26   32   24   23   30    24
 X30  |    8   21   12   11   14    5   13   10   15  ---    4 |    21   31   29   19   25   19   28   20   20  ---    20
  31  |    8   19   15    8   20    4   22   11   12   16    4 |    21   30   28   22   36   20   31   19   23   21    21
  32  |    8   19   10   10   15    3   11   13   12   20    4 |    16   23   23   25   28   17   19   23   20   20    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   21   11   12   21    5   20   12   11   20      |T   25   33   28   27   34   26   32   26   27   27    26
 WRMS |    7   21   10   11   14    5   19   11    7   17      |NE  21   29   24   23   30   23   27   22   23   23    22
 MEDI |    7   19   10   10   16    5   20   12   10   18      |MD  21   30   24   24   30   21   28   22   23   23    21

Table 3.1620.1   GPS week: 1620   Day: 1   MJD: 55585.000                            

        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  |    6  ---  ---  ---  ---   69  ---  ---  ---  ---    0 |    49  ---  ---  ---  ---   76  ---  ---  ---  ---    50
   2  |    7   17    6   20   11    3   17   10    8   31    5 |    11   25   19   29   20   16   24   16   16   19    16
   3E |   13   20   10    9   19    9   14   17   13   15    5 |    80   80   82   77   80   78   81   74   76   83    79
   4  |    5   10    6   17   11    6    9    9    6   17    3 |    19   21   18   29   26   22   19   19   20   22    20
   5  |    5   20    9   11   11    4   22   12    8   27    4 |    10   26   20   14   25   15   28   16   16   21    15
   6  |    8   21    9    7   18    5   15   16   11   18    4 |    60   67   53   60   59   59   62   57   64   60    60
   7  |    8   24   11   10   18    5   19   15    6   16    4 |    12   30   20   18   27   17   26   17   17   21    17
   8  |    7   16    6    6   13    3   10   10    9   16    3 |    13   22   14   15   18   15   20   17   14   22    14
   9  |    6   16    5    9   14    4   13   12    8   14    3 |    19   24   22   24   24   22   24   21   26   22    22
  10  |    5   15    6    9    9    3   12   10    5   19    3 |    15   18   17   18   22   15   16   16   16   18    14
  11  |    4   18   10    5   18    5   18   12   10   18    4 |    20   31   17   23   35   18   26   25   20   27    19
  12  |    8   29    9   13   21    4   24   14    8   15    5 |    14   29   19   15   15   15   24   11   14   11    15
  13E |    6   17    7    8   23    6   24   13   11   16    4 |    24   36   27   24   38   24   35   30   24   27    26
  14E |    7   18   12    7   16    5   23   11    4    9    4 |    19   26   21   21   29   20   27   18   22   23    21
  15E |    7   20    9   12   13    4   21   12   12   27    4 |    15   23   21   21   22   17   20   21   22   33    19
  16  |    4   22   10    8   19    4   22   11   10   14    4 |    14   25   16   16   25   16   27   17   19   17    15
  17  |    6   19   11    6   20    4   19   10   10    9    4 |    14   26   18   10   29   15   26   12   15   15    14
  18  |    7   21    8   11   13    5   25   10   11   19    4 |    10   25   16   18   22   15   29   15   14   20    14
  19  |    9   22    9   11   20    5   23   12   11   17    4 |    22   37   31   25   32   26   36   22   28   20    25
  20  |    8   17   10   12   12    6   19   12   12   24    4 |    13   23   19   19   23   15   25   21   18   18    14
  21  |    7   20    8    7    6    3   21   11    9   30    4 |    18   21   16   20   14   19   21   23   22   29    18
  22  |    6   18    9    8   10    5   20   13   10   15    4 |    13   25   18   19   28   16   27   18   15   20    17
  23E |    4   22    8   10   19    5   25   12   12   13    4 |    12   30   15   17   18   12   23   15   15   15    11
  24  |    7   13    9   10   14    5   12   14   11   18    4 |    18   21   19   27   24   17   16   23   17   25    18
 X25  |   16   19    8   11   15    4  ---   17   12  ---    5 |    26   30   28   26   29   23  ---   25   27  ---    25
  26E |   14   20    9    9   29    5   18   16   13   12    5 |    17   24   17   20   36   19   23   25   27   17    18
  27  |    9   15    7    8   15    4   12   11    9   19    4 |    17   24   20   21   26   20   24   21   25   27    21
  28  |    6   18    8   10   21    3   14   13   10   19    4 |    14   29   16   16   28   17   24   19   21   19    16
  29  |   10   27   12   11   14    5   20   16   13   21    5 |    19   30   23   22   25   21   23   21   24   29    19
 X30  |    6   19    7    8   15    7   14   12    9  ---    4 |    14   26   19   13   23   15   25   19   15  ---    15
  31  |    8   19    8    7   19    4   20   13    8   12    4 |    19   31   22   18   35   19   28   20   19   20    20
  32  |    8   16    7    5   11    4   15   11   12   14    3 |    11   17   15   15   20   13   17   17   14   18    12
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    8   19    9   10   16    5   19   12   10   19      |T   20   29   22   22   28   22   27   22   22   24    21
 WRMS |    7   19    9    9   14    5   18   12    8   17      |NE  17   25   19   19   24   20   24   19   18   20    18
 MEDI |    7   19    9    9   15    5   19   12   10   17      |MD  15   26   19   20   25   17   24   19   19   21    18

Table 3.1620.2   GPS week: 1620   Day: 2   MJD: 55586.000                            

        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  |    9  ---  ---  ---  ---   92  ---  ---  ---  ---    0 |    35  ---  ---  ---  ---  104  ---  ---  ---  ---    34
   2  |    9   15    7   18    9    5   22    9   12   32    5 |    15   23   18   27   21   16   28   17   18   21    16
   3E |   12   15    9   11   20    6   16   11   10   15    4 |    58   59   58   59   60   59   59   58   58   60    58
   4  |    6    9    6   11   13    5   12    9    8   16    3 |    20   23   21   21   31   23   23   24   25   25    22
   5  |    7   19    7    8   13    6   23   16   10   25    4 |    18   26   19   20   30   17   28   21   20   22    17
   6E |   35   19   10   12   24    5   20   16    7   16    6 |   100  122  121  117  124  118  121  121  117  122   116
   7  |    8   20    8    9   16    5   19   11    6   13    4 |    17   28   21   18   29   17   26   20   19   20    18
   8  |    7   13    8    5   13    4   13    7    7   10    3 |    21   26   22   23   24   23   26   22   22   25    21
   9  |    7   14    6   10   12    4   11    9    8   13    3 |    16   23   20   20   22   19   23   19   21   21    19
  10  |    6   15    7    8   10    3   11   10    6   20    3 |    22   25   27   24   29   25   23   25   25   24    23
  11  |   10   16    6    8   15    4   20   12   10   17    4 |    20   31   25   23   38   23   28   29   25   27    23
  12  |    7   27   10    9   16    7   22   11    7   13    4 |    12   29   17   17   22   13   24   13   17   14    15
  13E |    7   14    5    8   20    5   22   11    8   12    4 |    18   28   24   21   38   23   29   24   22   23    22
  14E |    9   16    8    9   13    6   24   10    6   15    4 |    15   21   18   22   25   18   23   16   22   23    17
  15E |    8   26    9   12   11    4   22   11    8   11    4 |    15   27   21   22   20   19   22   20   20   21    18
  16  |    5   26    7    8   21    4   22   12    8   18    4 |    14   28   21   20   28   18   26   19   23   19    17
  17  |    9   22    7    8   17    3   20   13    8   10    4 |    20   28   20   20   31   19   30   20   18   19    18
  18  |    9   23    9   11   12    5   21   13    7   19    4 |    19   30   21   19   24   19   29   18   22   24    19
  19  |   11   22    6   13   18    4   21   10    8   10    4 |    28   33   23   21   35   23   35   22   27   25    24
  20  |    8   20    6   11   11    5   17   15    8   22    4 |    15   25   17   21   23   15   24   22   19   15    15
  21  |    8   19    9    9   10    5   23   12    8   30    4 |    21   21   18   22   17   20   23   24   25   31    19
  22  |    7   20    6    9    9    4   20   14    6   17    4 |    17   29   20   17   27   15   27   19   19   21    17
  23E |    6   23    8   11   17    3   23   11   10   13    4 |    22   31   25   23   30   23   27   23   26   22    21
  24  |   11   11    8   10   11    7   12   13   12   16    4 |    18   21   23   23   22   20   22   28   23   27    20
 X25  |   15   19    7    9   16    6  ---   14    6  ---    4 |    26   31   22   25   29   23  ---   24   26  ---    23
  26E |   15   19    7   11   19    4   17   17   12   11    5 |    19   26   22   25   34   23   26   28   31   19    21
  27  |    9   14    6   11    9    6   11   11    9   18    3 |    14   23   17   18   20   18   21   21   20   26    18
  28  |    9   23    6   11   19    5   14    8    8   14    4 |    19   33   21   21   28   21   27   21   21   21    20
  29  |   11   27    6   12   16    5   22   13    7   20    4 |    25   35   23   21   31   22   29   25   22   29    21
 X30  |    7   18    6   10   20    8   16   12    6  ---    4 |    19   29   22   21   27   21   23   22   23  ---    20
  31  |    7   16   10    9   21    4   23   12    7   13    4 |    17   29   22   22   33   20   30   21   23   23    19
  32  |    8   15    7    7   13    7   16   11   11   16    4 |    14   16   19   17   25   15   19   17   17   15    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   19    7   10   15    5   19   12    9   17      |T   22   30   25   25   31   26   30   25   26   27    23
 WRMS |    9   19    7    9   13    5   19   11    7   16      |NE  19   26   20   20   26   22   25   21   21   22    19
 MEDI |    8   19    7   10   15    5   20   11    8   16      |MD  19   28   21   21   28   20   26   22   22   23    19

Table 3.1620.3   GPS week: 1620   Day: 3   MJD: 55587.000                            

        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  |    8  ---  ---  ---  ---  175  ---  ---  ---  ---    0 |    54  ---  ---  ---  ---  162  ---  ---  ---  ---    50
   2  |    7   13    7   18    9    5   18   11    9   30    4 |    17   26   18   31   23   20   27   17   19   19    19
   3E |   10   14    7    7   19    5   15   15   14   13    4 |    69   65   65   66   67   65   68   65   68   66    66
   4  |    6    9    4   10   12    5    9   13   12   15    3 |    16   26   23   29   29   21   23   26   21   22    22
   5  |   10   19    9   10   12    6   20   15   12   23    4 |    16   26   20   21   30   17   28   18   21   22    19
   6E |   20   19   10   13   22    8   17   14   12   32    6 |   136  135  139  130  136  136  136  136  136  139   133
   7  |    6   18    6    9   15    4   17   12   11   14    4 |    16   28   18   20   27   17   26   16   20   18    18
   8  |    6   11    4    5   12    3   13   12    7   13    3 |    20   23   20   20   25   20   27   21   21   18    21
   9  |    7   11    5    8   11    4   13   10   10   17    3 |    21   25   21   22   26   22   21   23   26   24    21
  10  |    6   10    5    8   11    4    9   13    8   20    3 |    15   19   20   25   27   18   21   22   20   22    19
  11  |   11   15    5    8   15    5   17   16   10   18    4 |    21   33   27   27   37   24   29   30   24   24    25
 X12  |   11  ---  ---   17  ---   21  ---  ---  ---  ---   14 |    14  ---  ---   28  ---   28  ---  ---  ---  ---    20
  13E |   11   14    6    6   14    5   20   11   11   21    4 |    25   36   27   28   39   25   35   28   27   33    27
  14E |    8   14    8    7   10    3   22   12   11   17    4 |    18   21   22   20   26   19   23   21   26   21    21
  15E |   11   20    8   11   15    4   19   11   10   15    4 |    22   28   15   20   23   19   21   23   25   26    20
  16  |    7   21    8   10   18    3   24   17   13   16    5 |    13   30   20   16   25   17   29   16   21   17    18
  17  |    8   15    6    7   17    3   18   16    9   14    4 |    25   29   22   20   31   21   32   18   22   18    22
  18  |    7   20    6   11   11    4   23   11   15   17    4 |    15   31   17   21   21   19   31   16   22   22    19
  19  |   11   25    8   11   22    5   22   13   14   12    5 |    29   35   28   25   38   29   36   23   31   27    27
  20  |    8   13    5    8    9    8   18   18   10   25    4 |    20   27   19   20   25   20   28   20   22   19    18
  21  |    7   14    4    6    8    4   20   10   14   29    4 |    22   23   19   23   23   21   22   24   22   28    21
  22  |    6   18    5    7   10    5   21   16    8   15    4 |    17   31   21   19   30   19   29   23   19   20    21
  23E |    6   21    9   12   15    3   30   13   11   14    5 |    17   29   22   22   30   17   31   20   18   23    21
  24  |   14   12    7   31   11    8   12   16   12   19    5 |    19   24   22   37   24   20   21   28   22   24    21
 X25  |   19   14    7    7   13    4  ---   18    9  ---    5 |    28   29   24   28   34   25  ---   27   30  ---    27
  26E |   15   17    9   10   23    3   15   20   12   12    5 |    16   20   17   22   26   18   20   24   27   17    17
  27  |    7   10    8    8   13    4   12   14   12   24    4 |    21   27   21   22   25   23   24   24   26   29    22
  28  |    7   20    6    9   16    5   16   15    7   21    4 |    15   33   19   16   29   18   26   19   19   19    18
  29  |   11   24    8    8   12    6   19   16   11   22    4 |    25   33   24   26   29   24   30   24   22   35    23
  30  |    8   14    9    9   17    3   13   17   11   29    4 |    16   23   20   13   24   16   23   18   14   28    16
  31  |    9   17    7    8   18    6   19   16   14   14    4 |    17   28   18   16   34   16   26   19   17   19    18
  32  |    9   15    8    9   11    8   16   17   11   18    4 |    15   22   24   23   25   18   21   17   18   16    18
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   16    7   11   15    5   18   14   11   20      |T   25   32   26   27   32   29   31   26   27   28    26
 WRMS |    8   16    7   12   14    5   17   14    9   19      |NE  19   27   20   22   27   26   25   21   21   21    21
 MEDI |    8   15    7    9   13    5   18   14   11   17      |MD  18   28   21   22   27   20   27   22   22   22    21

Table 3.1620.4   GPS week: 1620   Day: 4   MJD: 55588.000                            

        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  |   10  ---  ---  ---  ---   90  ---  ---  ---  ---    0 |    51  ---  ---  ---  ---   75  ---  ---  ---  ---    53
   2  |   14   22   11   69   11    8   22   12   10   30    9 |    21   33   24   74   26   26   31   24   22   26    24
   3E |   11   15    8    9   23    6   15   17    8   17    4 |    34   35   36   32   40   35   40   37   35   38    32
   4  |   10   10    7   25   10    6   10   16    9   16    4 |    21   25   29   33   27   24   24   27   26   27    23
   5  |    8   17    9    7   11    3   21   13    9   23    4 |    17   28   23   20   29   20   31   24   19   22    19
   6E |   19   18    9   11   24   13   17   17    8   15    5 |    81   95   90   94   96   95   95   91   92   97    91
   7  |    8   24   10   10   20    4   20   10   10   12    4 |    21   37   25   25   31   26   33   26   24   23    22
   8  |    8   13    7    8   14    3   13    6    8    8    3 |    24   27   25   29   27   29   31   25   29   29    25
   9  |    8   12    6   13   14    4   11   10    8   17    3 |    28   27   26   24   30   27   27   30   28   31    25
  10  |    6   36    8   11   11    5   10   11    6   17    4 |    22   43   26   24   26   25   22   26   22   24    22
  11  |   13   16    6    8   16    4   19   13    8   14    4 |    22   33   30   30   33   28   32   33   28   31    26
 X12  |    6  ---   12  ---  ---    6   21   17    8  ---    6 |    13  ---   17  ---  ---   17   26   17   14  ---    16
  13E |    7   14    7    8   14    4   20   12    8   22    4 |    37   40   39   35   41   40   43   39   37   36    36
  14E |    8   13   10   10   13    4   21   11    7   14    4 |    14   23   23   27   25   20   23   19   21   22    19
  15E |   10   24    8   17   13    7   23   11   11   20    5 |    26   32   29   34   31   27   29   33   29   35    27
  16  |    8   24    9    9   16    8   29   15    9   18    5 |    19   31   24   22   27   24   33   26   23   24    20
  17  |    7   20   10    9   20    4   20   18    7   15    4 |    25   34   28   25   37   28   35   23   22   24    25
  18  |    9   19   11   14   13    4   23    7    8   16    4 |    20   27   23   24   26   22   31   23   23   22    20
  19  |   12   26    9   12   20    5   23   11    8   12    5 |    26   37   27   25   38   25   34   26   23   26    25
  20  |   11   16    8   10   10    6   20   17    7   25    4 |    22   31   29   24   29   25   31   31   24   26    23
  21  |   11   17   14    8   13    4   24   11   10   27    5 |    25   28   30   28   20   27   30   30   27   31    25
  22  |    6   17   10    9   11    5   23   10    7   13    4 |    18   26   25   21   28   20   32   21   18   19    19
  23E |    8   21    9   11   15    4   28   14    5   12    4 |    21   30   28   23   25   25   32   22   24   25    21
  24  |   10   13    8    9   10    5   11   14   11   16    4 |    20   27   27   30   24   26   23   32   24   30    24
 X25  |   22   17    9    9   15    6  ---   15   12  ---    6 |    31   34   27   34   36   31  ---   30   31  ---    29
  26E |   17   35   10   14   28    6   15   26   16   11    7 |    23   41   22   27   35   27   28   35   24   26    22
  27  |    9   12   10   12   15    3   11   18    8   21    4 |    27   29   29   29   32   29   26   35   27   35    26
  28  |    9   23    7   12   19    4   18   11    6   18    4 |    22   36   24   25   29   25   28   20   22   25    21
  29  |   12   30    9   12   12    5   20   14    9   16    5 |    29   36   26   30   28   26   32   25   27   29    25
  30  |    8   15    6    9   12    7   13   13   10   23    4 |    20   29   24   21   24   22   27   26   23   32    20
  31  |    7   17   10   10   19    6   21   11    8   12    4 |    21   31   26   23   36   23   32   24   22   25    21
  32  |   14   17    6   10   10    4   18   14    7   20    4 |    20   26   26   22   28   23   25   26   21   26    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   20    9   17   16    6   19   14    9   18      |T   25   33   28   30   32   29   32   29   26   29    26
 WRMS |   10   19    8   11   15    5   19   13    8   18      |NE  23   30   25   27   28   26   29   26   23   26    23
 MEDI |    9   17    9   10   14    5   20   13    8   16      |MD  22   31   26   25   29   26   31   26   24   26    23

Table 3.1620.5   GPS week: 1620   Day: 5   MJD: 55589.000                            

        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  |    8  ---  ---  ---  ---  103  ---  ---  ---  ---    0 |    46  ---  ---  ---  ---   53  ---  ---  ---  ---    45
   2  |    8   14   10   13   11    6   23   11    9   29    5 |    16   27   25   23   22   22   30   19   20   20    18
   3E |   11   16    7   10   24    8   16   20   13   15    5 |    69   67   66   66   68   65   65   67   65   66    65
   4  |    7   10    9   11   13    6   11   16    9   19    4 |    15   22   23   21   26   21   20   22   23   22    18
   5  |    9   18   10    7   14    5   23   14   12   24    4 |    17   31   25   18   28   21   33   18   23   22    19
   6E |   12   18   10   11   28    7   16   25    9   20    5 |    99  103  102   99  109  101  104   99  104  103   101
   7  |   14   21   10    9   23    5   21   10   10   15    5 |    23   37   24   24   35   25   32   22   22   21    22
   8  |    6   12    7    8   16    4   11    9    7    9    3 |    21   27   21   22   24   23   27   23   23   23    22
   9  |    6   13    8    8   12    5   14   13   10   11    3 |    27   32   31   30   34   28   31   30   30   33    29
 X10  |    8   11    5   14   16    5  ---    9   10  ---    4 |    16   25   24   24   26   22  ---   19   21  ---    17
  11  |    9   16    4    6   15    7   21   13   12   14    4 |    23   36   27   27   36   27   35   27   26   26    25
  12  |    7   21   14    8   19    7   24   16    9   17    5 |    19   26   21   12   12   20   27   16   17    6    19
  13E |    7   14    9   12   16    7   20   13   13   21    4 |    32   42   37   36   46   36   42   33   30   40    34
  14E |    7   18   12    9   17    5   25   14   10   13    4 |    18   29   27   25   23   20   27   21   22   23    21
  15E |    9   25   12   14   22    4   21   13    8   12    5 |    25   31   27   28   32   24   27   27   20   27    24
  16  |    8   25    9   11   22    7   24   17    9   19    5 |    17   30   21   20   28   19   32   21   18   23    18
  17  |    7   16   12    9   15    6   23   20   13   15    5 |    33   38   29   23   38   34   38   26   35   31    31
  18  |    7   19    8    8   11    5   21   10   10   20    4 |    17   26   19   22   25   19   28   17   19   16    17
  19  |    8   23   10    9   24    6   21   12   19   13    5 |    32   39   32   30   42   31   39   26   34   29    30
  20  |    9   15   11   11   13    7   20   18   10   26    5 |    23   31   25   21   29   24   32   24   18   19    20
  21  |   16   17   54    8   19    8   23   14   14   31    9 |    25   24   45   20   25   20   26   25   19   27    20
  22  |    6   16    6    9   10    7   19   13    8   18    4 |    18   29   22   21   28   20   30   21   18   17    19
  23E |    7   20    8   12   17    6   28   15   11   17    5 |    18   30   24   22   29   20   29   20   15   26    18
  24  |    7   14    4    7   14    7   13   12   12   15    3 |    17   24   21   22   23   21   20   23   22   23    19
 X25  |   19   17   10   11   24    5  ---   17   10  ---    6 |    31   31   27   29   35   27  ---   26   32  ---    28
  26E |   16   17    7    8   26    5   16   21   12   13    5 |    17   24   18   21   26   19   26   28   24   22    17
  27  |    7   11    8    7   17    5   15   12   10   13    3 |    28   35   35   31   36   32   35   32   32   36    31
  28  |    7   23    8   11   24    7   18   16    5   21    5 |    19   35   19   19   29   21   27   15   19   21    18
  29  |   11   21   10    7   20    3   25   12   14   15    5 |    40   43   43   37   42   39   46   38   44   37    39
  30  |    7   14    8    8   20    7   13   17    6   22    4 |    18   26   24   18   28   20   26   23   16   29    18
  31  |    7   17    9    6   23    7   18   14   10   14    4 |    18   30   23   20   37   20   29   22   18   21    19
  32  |   10   16    8    7   16    8   17   11    8   18    4 |    18   27   28   24   30   25   26   20   20   20    21
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   18   13    9   19    6   20   15   11   18      |T   26   34   30   27   33   28   34   27   27   28    26
 WRMS |    9   18   11    9   18    6   20   14    7   18      |NE  21   29   25   22   29   24   29   22   22   22    22
 MEDI |    8   17    9    9   17    6   20   14   10   17      |MD  19   30   25   23   29   22   30   23   22   23    20

Table 3.1620.6   GPS week: 1620   Day: 6   MJD: 55590.000                            

        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  |   10  ---  ---  ---  ---  212  ---  ---  ---  ---    0 |    44  ---  ---  ---  ---   61  ---  ---  ---  ---    44
   2  |    9   18    8   11   11    5   23    9    9   27    4 |    22   32   23   28   28   22   33   21   23   19    20
   3E |   12   18   12   12   28    7   15   10    8   14    4 |    84   83   77   84   83   77   78   79   82   82    81
   4  |    9    9    6    6   13    6   12   11    9   15    3 |    21   22   31   29   36   25   20   31   27   27    25
   5  |    7   16    8   10   13    4   22   12    7   27    4 |    18   29   24   27   33   20   33   16   25   33    22
   6E |   12   16   11   14   32    3   15   20   11   24    5 |    83   91   89   85   91   88   93   88   88   92    85
   7  |    9   20    6    8   22    5   21   11    9   19    4 |    17   28   17   15   32   16   26   18   16   19    15
   8  |    9   11    7    6   16    4   13    7    9   11    3 |    13   14   10   13   21   12   19   13   14   15    10
   9  |    8   12    6    7   12    4   13    8    9   16    3 |    24   25   24   24   28   23   25   21   22   21    22
  10  |    7   10    5    8   15    3   11    8    9   18    3 |    22   31   30   29   36   27   23   26   31   29    26
  11  |    9   16    7    7   17    4   20   10    7   14    3 |    23   37   32   33   47   28   35   31   30   29    28
 X12  |    7   23    7   10   17    4   22   10    5  ---    4 |    12   24   12    9   13   10   22   12   12  ---    11
  13E |    8   12    5   10   20    5   20    9   10   25    4 |    36   44   40   38   51   38   45   34   36   46    38
  14E |    7   15    7   11   19    5   25    9    6   12    4 |    15   23   19   23   20   16   24   18   22   18    16
  15E |    9   20    7   13   14    2   24   11   13   10    4 |    20   25   22   26   25   19   24   20   25   22    20
  16  |    8   18    9   12   28    4   24   16   12   18    5 |    16   29   20   18   44   20   29   24   22   23    18
  17E |    9   24    9   11   21    4   25   13   10   18    5 |    31   38   30   27   40   32   42   30   32   29    29
  18  |    8   20    9   12   12    4   22    8   12   20    4 |    20   32   20   27   26   21   33   22   26   28    22
  19  |    9   25    8   10   24    4   23   10    7   16    4 |    32   38   28   26   43   29   41   27   31   32    28
  20  |    7   15    5    8   16    6   22   13    7   27    4 |    23   30   23   23   32   21   33   21   25   18    21
  21  |    7   17    8    8   10    4   23    9   11   30    4 |    21   26   31   26   25   22   25   27   25   29    22
  22  |    7   17    8   10   15    6   21   14    9   18    4 |    18   31   21   23   32   19   31   27   22   24    21
  23E |    6   23    8   10   23    5   33   13   10   18    5 |    16   33   22   20   35   17   31   16   20   22    17
  24  |   10   15    8   24   15    7   15   11    7   16    4 |    19   23   26   33   30   20   23   28   23   23    23
 X25  |   18   14    7    9   19    4  ---   13    9  ---    5 |    32   31   29   28   39   30  ---   28   29  ---    28
  26E |   21   17   10   12   18    4   16   21   15   12    5 |    15   22   19   20   22   14   19   24   24   18    15
  27  |   10   12    8   10   13    3   13   11    9   18    3 |    21   25   20   21   25   19   23   17   18   20    18
  28  |   11   22    8   13   23    3   16    9   10   17    4 |    16   31   15   15   30   15   23   15   18   21    13
  29E |   14   26    8    8   18    6   22    9   10   18    5 |    38   42   37   32   41   36   37   33   39   33    33
  30  |    9   16   11   10   23    4   14   14    8   24    4 |    17   30   19   16   35   17   25   25   19   29    17
  31  |    9   17    8   10   19    4   19   14   14   16    4 |    17   29   19   19   34   16   27   21   17   22    17
  32  |    8   17    8    9   16    8   20   10   10   19    4 |    19   23   26   22   33   18   24   19   23   21    20
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   17    8   11   19    5   20   12   10   19      |T   25   32   27   27   35   26   32   26   27   29    25
 WRMS |    9   17    8   10   16    5   20   11    8   18      |NE  21   28   22   22   31   22   27   22   22   24    21
 MEDI |    9   17    8   10   17    4   20   11    9   18      |MD  20   30   23   26   33   20   26   24   24   23    21



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 4.1620   GPS week: 1620   MJD: 55584.0-55590.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3025 |U    7     8    20 |U    7    11    29 |U   11    13    22 |
emr | emr 2937 |U   10     9    29 |U    9    11    36 |    14    15    23 |
esa | esa 2962 |     7     7    20 |U    6    10    28 |    11    14    22 |
gfz | gfz 2932 |U    9    10    29 |U   10    21   115 |U   12    14    23 |
grg | grg 2947 |     8     8    21 |U    7    10    31 |    12    16    23 |
igr | igr 2913 |     8     8    21 |     8    12    30 |    11    14    21 |
igs | igs 2855 |     7     8    20 |     8    12    30 |    12    14    21 |
jpl | jpl 2837 |U   28    19    37 |U    8    11    38 |U   13    15    25 |
mit | mit 2962 |U   10     9    29 |U   10    11    41 |U   14    18    23 |



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 5.1620.0   GPS week: 1620   Day: 0   MJD: 55584.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3027 |     7     7    18 |  ----  ----  ---- |     6     4    14 |
emr | emr 2970 |     9     9    22 |  ----  ----  ---- |     7     7    18 |
esa | esa 2976 |     8     7    21 |  ----  ----  ---- |     5     6    18 |
gfz | gfz 2962 |    10    11    24 |  ----  ----  ---- |     6     5    17 |
grg | grg 2976 |     8     9    23 |  ----  ----  ---- |     6     5    19 |
igr | igr 2951 |     8     7    23 |  ----  ----  ---- |     5     6    16 |
igs | igs 2868 |     8    10    24 |  ----  ----  ---- |     6     7    19 |
jpl | jpl 2866 |    20    11    26 |  ----  ----  ---- |     9     9    21 |
mit | mit 2976 |     7     8    24 |  ----  ----  ---- |     6     6    16 |

Table 5.1620.1   GPS week: 1620   Day: 1   MJD: 55585.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3017 |     6     8    12 |     6    11    25 |     6     6    15 |
emr | emr 2968 |    10     9    34 |     7    12    33 |     8     8    14 |
esa | esa 2976 |     6     8    13 |     6    12    22 |     5     6    20 |
gfz | gfz 2969 |     9     9    32 |     9    22   119 |     7     8    21 |
grg | grg 2976 |     7     9    15 |     6    13    23 |     6     8    18 |
igr | igr 2971 |     6     8    14 |     5    11    21 |     5     6    18 |
igs | igs 2877 |     6     7    12 |     6    11    23 |     5     7    16 |
jpl | jpl 2871 |    12    10    44 |     6    11    30 |     9     7    16 |
mit | mit 2976 |     9    10    35 |     6    10    31 |     9    11    23 |

Table 5.1620.2   GPS week: 1620   Day: 2   MJD: 55586.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3034 |     8     8    16 |     7    11    27 |    40    52    49 |
emr | emr 2968 |     9    10    26 |     7    11    30 |    43    48    46 |
esa | esa 2976 |     9     6    16 |     6    10    24 |    42    51    47 |
gfz | gfz 2969 |     7     6    18 |     8    22   103 |    42    51    47 |
grg | grg 2976 |     9     7    18 |     7    10    26 |    40    53    51 |
igr | igr 2975 |     9     7    18 |     6    10    24 |    40    51    47 |
igs | igs 2855 |     9     8    18 |     6    12    26 |    41    50    46 |
jpl | jpl 2864 |    12    12    28 |     6    12    34 |    42    48    50 |
mit | mit 2976 |     8     6    22 |     7     9    31 |    45    55    45 |

Table 5.1620.3   GPS week: 1620   Day: 3   MJD: 55587.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3031 |    11    11    30 |     8     9    29 |     6     7    19 |
emr | emr 2870 |    10    10    22 |     7     7    31 |     8    12    19 |
esa | esa 2880 |     9     9    24 |     6     8    34 |     4     7    16 |
gfz | gfz 2868 |    11    11    26 |    10    23   118 |     6    10    17 |
grg | grg 2879 |     9     9    24 |     7     8    32 |     6    10    16 |
igr | igr 2822 |     8     7    22 |     8    11    31 |     6    11    15 |
igs | igs 2752 |     9     9    24 |     7    11    33 |     5     8    15 |
jpl | jpl 2769 |   108    65    35 |     8     8    36 |     8    10    26 |
mit | mit 2880 |    17    16    33 |    12     9    38 |     8    13    18 |

Table 5.1620.4   GPS week: 1620   Day: 4   MJD: 55588.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3027 |     5     7    18 |     8     9    34 |     7     9    16 |
emr | emr 2868 |    11    10    39 |    14    10    49 |    10    10    26 |
esa | esa 2976 |     7    11    21 |     6     9    33 |     7     9    17 |
gfz | gfz 2841 |    10    22    48 |    12    23   116 |    10     8    24 |
grg | grg 2880 |     7     8    21 |     7     8    37 |     9    13    21 |
igr | igr 2934 |     8    12    24 |     7     8    36 |     7     7    17 |
igs | igs 2869 |     6     8    21 |     8     8    32 |     7    10    17 |
jpl | jpl 2856 |    23    19    57 |    12    10    51 |     9     9    20 |
mit | mit 2976 |    10    11    45 |    12    15    54 |    10    13    21 |

Table 5.1620.5   GPS week: 1620   Day: 5   MJD: 55589.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3009 |     7     8    24 |     7     9    33 |     8     9    20 |
emr | emr 2957 |    10     8    35 |     9     7    34 |    11    11    21 |
esa | esa 2976 |     7     6    19 |     7     8    30 |     9    10    18 |
gfz | gfz 2957 |     8     8    30 |     8    16   123 |     8    10    20 |
grg | grg 2969 |     8     6    22 |     8     8    35 |     8    15    19 |
igr | igr 2867 |     7     8    23 |     9    13    32 |     8    10    18 |
igs | igs 2872 |     8     5    19 |     8    13    31 |    10    11    20 |
jpl | jpl 2770 |    11     8    39 |     7     9    38 |    10    13    22 |
mit | mit 2976 |     9     6    24 |    11     9    40 |    13    16    19 |

Table 5.1620.6   GPS week: 1620   Day: 6   MJD: 55590.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 3036 |     6     6    23 |     9    17    29 |     7     6    19 |
emr | emr 2963 |     9     8    22 |    12    16    40 |    10     9    18 |
esa | esa 2976 |     6     6    23 |     8    14    27 |     7     6    16 |
gfz | gfz 2963 |     7     6    28 |    15    22   109 |     6     9    14 |
grg | grg 2975 |     7     6    22 |    10    14    36 |     6     8    18 |
igr | igr 2877 |     7     7    22 |    10    18    34 |     6     6    13 |
igs | igs 2894 |     7     6    22 |    10    18    34 |     7     8    16 |
jpl | jpl 2866 |    13    11    30 |    10    19    42 |     8     8    19 |
mit | mit 2976 |     8     8    21 |    16    14    53 |    10    13    20 |


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 6.1620   GPS week: 1620   MJD: 55584.500-55590.500

                                                         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 |     -18     -32      39      27     -3 |       3     23
            |      14      42     130      85      4 |       4
emr   uuuuu |     -15      12    -142    -158      3 |      29     38
            |      24      32     142     139      8 |       8
esa   uuuuu |      14       5     152     -56      1 |     -11     25
            |      14      16      89      71      5 |       5
gfz   uuuuu |      -9      31     -12     -38      1 |       0     23
            |      16      22      72      65      5 |       5
grg   uuuux |      20     -57      48     -84    -14 |       5     16
            |      19      31     115     126     21 |       1
igr   xxxxx |      11      24      77     -65      7 |       5     22
            |      14      21      75      70      3 |       6
irf   xxxxx |      20     -16     -72      49     -2 |       8     25
            |      20      14      73      33     18 |       6
jpl   uuuuu |      33      -1     -35     109    -10 |      -3     19
            |      33      25      82      98     10 |       4
mit   uuuuu |      28      -8    -210     130      6 |      15     30
            |      28      24     144      65     23 |       9
ngs   uuuuu |     -35       4      50      -7     -3 |     -10     20
            |      33      36      91     137     17 |       1
sio   uuuuu |     -19     -24      -4     124      8 |      29     38
            |      40      13     136      76     20 |      10


Table 7.1620.0   GPS week: 1620   Day: 0   MJD: 55584.500

                                                         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 |      -9     -36     -20      51      0 |      -4     19
emr   uuuuu |      26      55    -333    -432     13 |      16     27
esa   uuuuu |      23      19     220      12     -7 |     -18     27
gfz   uuuuu |       9      20    -132      79     -5 |      -7     20
grg   uuuux |      15     -25     -99    -227    -29 |       5     19
igr   xxxxx |      10      27      14      66      5 |      -3     15
irf   xxxxx |      20     -11      38      75     11 |      -2     17
jpl   uuuuu |      -7      30    -151     -58    -21 |     -10     22
mit   uuuuu |      17       4      17     108     20 |       2     17
ngs   uuuuu |     -52     -48      58      15    -29 |     -11     21
sio   uuuuu |     -26     -37     195     252     20 |      13     22

Table 7.1620.1   GPS week: 1620   Day: 1   MJD: 55585.500

                                                         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 |     -28     -47     -70     -23     -4 |       0     22
emr   uuuuu |     -19      39    -333    -237     14 |      22     34
esa   uuuuu |      17      12     230      10     -3 |     -16     27
gfz   uuuuu |      -3      26      17     -62      5 |      -4     22
grg   uuuux |      30     -82      18      17    -11 |       3     17
igr   xxxxx |       3      26     -29     -70      7 |       1     19
irf   xxxxx |     -12       1     -73      77     16 |       2     22
jpl   uuuuu |      22      -3     -97      90    -22 |      -6     20
mit   uuuuu |     -18      16    -182     199     30 |       7     25
ngs   uuuuu |      13     -18      45    -126    -17 |     -10     20
sio   uuuuu |     -68     -18      -1     140     26 |      19     31

Table 7.1620.2   GPS week: 1620   Day: 2   MJD: 55586.500

                                                         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 |     -28      -6       2      47     -2 |       2     22
emr   uuuuu |       3      15    -155    -114     -2 |      27     38
esa   uuuuu |      12     -27      99    -166      4 |     -13     26
gfz   uuuuu |      -9      19     -72     -80      3 |      -2     22
grg   uuuux |      31     -48     -21      26     -5 |       3     17
igr   xxxxx |      13      50      52     -82      8 |       3     21
irf   xxxxx |      19     -16       3      77     13 |       6     25
jpl   uuuuu |      -7      23      -4     102    -12 |      -3     17
mit   uuuuu |      21       0     -80     221     27 |      11     30
ngs   uuuuu |     -22      28       4      49     -7 |     -10     20
sio   uuuuu |     -32     -15     170     104     25 |      25     37

Table 7.1620.3   GPS week: 1620   Day: 3   MJD: 55587.500

                                                         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     -79      48      34     -3 |       5     22
emr   uuuuu |     -22       6    -113     -34      2 |      32     39
esa   uuuuu |      -3       1      56      -1      4 |     -10     23
gfz   uuuuu |     -22      48      65     -17      4 |       1     22
grg   uuuux |      52    -104     140      74     15 |       7     15
igr   xxxxx |      14      31     104     -55      8 |       7     22
irf   xxxxx |       2       2    -135      40      4 |      11     26
jpl   uuuuu |      67      -6      -9     276    -16 |      -1     15
mit   uuuuu |      18      20    -312      63     14 |      17     33
ngs   uuuuu |     -11       1     107    -252     12 |      -9     20
sio   uuuuu |     -66     -11    -106      87     19 |      32     42

Table 7.1620.4   GPS week: 1620   Day: 4   MJD: 55588.500

                                                         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       4     317     -34     -7 |       3     23
emr   uuuuu |     -49      27     -50     -74     -5 |      33     40
esa   uuuuu |      -7       4      82    -134      7 |     -10     23
gfz   uuuuu |      13      -3     -41     -38     -1 |       1     22
grg   uuuux |      -7     -16     -51    -103    -39 |       6     15
igr   xxxxx |     -14       6      63     -66      9 |       7     22
irf   xxxxx |      39     -32    -103      32     -9 |      11     26
jpl   uuuuu |      24      10     -91      94      1 |      -3     18
mit   uuuuu |      52     -27    -281     114     -3 |      19     34
ngs   uuuuu |     -26      22     214      74     -3 |     -10     20
sio   uuuuu |      18     -40     -43      92      1 |      34     42

Table 7.1620.5   GPS week: 1620   Day: 5   MJD: 55589.500

                                                         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     -85     -45     187      3 |       5     24
emr   uuuuu |     -15     -38      11     -60      4 |      35     42
esa   uuuuu |      32       7     283     -62      3 |      -7     24
gfz   uuuuu |     -27      44      35    -130      7 |       4     23
grg   uuuux |       6     -73     152    -132    -36 |       5     15
igr   xxxxx |      22     -13     183    -175     11 |      10     25
irf   xxxxx |      40     -33    -168      54    -22 |      13     27
jpl   uuuuu |      66     -40      90     150      2 |      -1     20
mit   uuuuu |      68     -41    -409     158    -20 |      23     36
ngs   uuuuu |     -81      61     -69      44     -2 |      -9     20
sio   uuuuu |      19     -36    -156     178    -15 |      38     46

Table 7.1620.6   GPS week: 1620   Day: 6   MJD: 55590.500

                                                         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 |       9      24      46     -76     -9 |       8     26
emr   uuuuu |     -25     -17     -19    -156     -5 |      39     46
esa   uuuuu |      23      21      97     -49     -2 |      -4     25
gfz   uuuuu |     -22      64      45     -19     -4 |       7     26
grg   uuuux |      17     -52     201    -243      6 |       6     14
igr   xxxxx |      31      41     152     -70      3 |      15     29
irf   xxxxx |      35     -19     -65     -13    -29 |      15     28
jpl   uuuuu |      66     -22      16     107     -3 |       2     22
mit   uuuuu |      41     -26    -218      48    -27 |      25     37
ngs   uuuuu |     -67     -19     -10     150     21 |      -8     21
sio   uuuuu |      25      -9     -87      13    -23 |      41     48



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