[IGSREPORT-16548] Wk 1491 IGS Final Orbits

Jim Ray IGS.ACC at noaa.gov
Thu Aug 21 05:41:07 PDT 2008


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IGS Electronic Report   21 Aug 05:41:10 PDT 2008      Message Number 16548
******************************************************************************

Author:  AC Coordinator / NOAA NGS

sum-file Version 2.0
Final IGS Orbit Combination - Week 1491   (Aug 03, 2008 - Aug 09, 2008)

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 (weights are those from the orbit combination). 
Pole rate combination uses only centres providing estimated pole rates.

  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:

igs1491[0-6].sp3  IGS GPS ephemeris files in SP3 format.
igs1491[0-6].clk  IGS GPS satellite and station clocks in SP3 format.
igs1491[0-6].cls  IGS GPS clock combination summary report.
igs14917.erp      Earth Rotation Parameters (ERP) and their rates as well as
                  Universal Time (UT1-UTC) and Length Of Day (LOD) associated 
                  with IGS ephemerides.
igs14917.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 1478, a new solution from CNES/GRGS (GRG) is included for
    evaluation and statistics only.

 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.
    
               Day | Centre | PRN/STA list
               ----+--------+---------------
                0  |  COD   | 5 30 RAMO WROC WTZR
                0  |  EMR   | WTZR
                0  |  ESA   | 5 30 RAMO
                0  |  GFZ   | 7 16 29
                0  |  JPL   | 30 QUIN
                0  |  MIT   | 6 21 ALIC NYAL
                1  |  COD   | 5 30 CAS1 KARR NRIL
                1  |  ESA   | 5 22 30 DARW UNSA
                1  |  GFZ   | 7 29 30 BJFS NLIB PERT
                1  |  JPL   | 30 PERT
                1  |  MIT   | 16 21 22 USNO
                2  |  COD   | 30 BRUS DRAO WTZR
                2  |  EMR   | 5 DRAO MIZU
                2  |  ESA   | 30 NRC1 USNO WTZR
                2  |  GFZ   | 7 16 18 30 BAN2
                2  |  JPL   | CHPI
                2  |  MIT   | 18 NRC1 USNO
                3  |  ALL   | 30
                3  |  COD   | 4 BOR1 BRUS IENG NRIL RAMO
                3  |  EMR   | MIZU YAKT
                3  |  ESA   | 4 19 RAMO UNSA USNO
                3  |  GFZ   | 7 16 19 29
                3  |  JPL   | 19 BOGT
                3  |  MIT   | 5 19 USNO
                4  |  COD   | 3 30 CEDU NRIL
                4  |  EMR   | THU3
                4  |  ESA   | NRC1 RAMO TWTF
                4  |  GFZ   | 7 NISU TWTF
                4  |  JPL   | 30
                4  |  MIT   | 5 USNO
                5  |  COD   | CEDU
                5  |  EMR   | MIZU
                5  |  ESA   | NRC1 RAMO
                5  |  GFZ   | 7 29 BAN2 DAEJ DGAR HARB MAS1
                5  |  MIT   | 4 5 9 DAEJ DARW MAS1 USNO
                6  |  COD   | BRUS CEDU HOB2 IENG MAW1
                6  |  EMR   | MIZU
                6  |  ESA   | NLIB TIXI
                6  |  GFZ   | 7 BAN2 BJFS
                6  |  MIT   | 5 29 USNO

 5. 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
               ----+------------+----------
               G28 | 2008_08_07 | 2008086 
               G28 | 2008_08_08 | 2008086 

 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 the all AC orbit and ERP values in order
    to align them to the IGS05. These rotations were estimated in the process
    of the IGS SINEX combination, performed at NRCan by Remi Ferland, are based 
    on the common stations between the individual AC SINEX solutions and the 
    IGS05.snx SINEX. 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  |     .5     .5     .9      -7     -9      0    -.47
       EMR  |    -.8   -7.6   -6.8      51    -26     30    -.48
       ESA  |    2.1     .8    2.0      21     -7     36    -.44
       GFZ  |    1.3     .3    1.9       0    -41     -3    -.77
       GRG  |    3.5    2.5    5.2     -25    -12     -1    -.24
       JPL  |   -8.0   -3.6   -1.9      17     20     -8    -.41
       MIT  |     .4   -2.2    3.6       0      8    -21    -.59
       NGS  |    1.9   -2.5    5.6     -35      4     19    -.47
       SIO  |   -6.3   -1.8  -12.2     -38     56     -9    -.34


 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 NRCan. 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 1.1491.a). It also displays the computed satellite
position sigmas for the combined orbits (table 1.1491.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 2.1491.[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 3.1491.[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 5.1491.0-6).

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 1491 summary.                       (Aug 03, 2008 - Aug 09, 2008)

Table 1.1491.a   GPS week: 1491   MJD: 54681.000-54687.000

         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  212|    0     0     0    17    18   -34  -.20   10   10 |    -284    -380     17    116
        |    0     0     1     5    13    10   .01           |     757    1271
emr   75|    0     2    -4  -112    59     2   .39   15   15 |    1728    -308     17    155
        |    1     1     1    13    29    11   .04           |     751    1271
esa  111|    0     0     5   -18   -21     0   .32   11   11 |   -8987    -318     22    141
        |    0     0     1    18    19    19   .03           |     642    1892
gfz  198|    0     0    -3    -2    81    68  -.13   13   13 |     147    -177     23    129
        |    1     0     0    14    11    38   .02           |     385     979
grg   80|    0     0     2    31    36     7  1.04   33   31 |    -299    -391    671 143075
        |    1     2     2    18    14    66   .06           |     786    1288
igr  n/a|    0     0     2    11     3   -38   .07    5    5 |    8485     201     24     78
        |    0     0     0     9    10    19   .04           |     970    1194
jpl  120|    2     1    -1   -38   -32     8   .51   14   14 |    2949    -298     20     98
        |    1     2     2    10     9    29   .04           |     414    1166
mit  257|    0    -1    -2   -14   -48    11  -.29   11   10 |    -150     -30     21    121
        |    1     1     1    30    33    11   .03           |     242     684
ngs  230|    0     0     2    84     8   -58  -.27   10    9 | 1285516 1285500   2350   3934
        |    0     1     1    28    22    17   .04           | 3860745 3860751
sio  109|   -1     1     2    84  -124    19  -.20   21   20 |     ---     ---    ---    ---
        |    1     1     0    36     9     9   .03           |     ---     ---


Table 1.1491.b   GPS week : 1491   MJD: 54681.000-54687.000   

         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
------+------------------------------------+------------------------------------------
   2  |    5    5    5    5    5    5    5 |
   3  |    4    4    4    4    7    5    6 |
   4  |    5    5    5    5    5    4    4 |
   5  |    6    6    7   16    8    8    7 |
   6  |    4    4    4    4    4    4    4 |
   7  |    6    5    5    5    5    5    5 |
   8  |    4    4    4    4    4    4    3 |
   9  |    4    4    4    4    4    4    4 |
  10  |    4    4    4    4    4    4    4 |
  11  |    4    4    4    4    4    4    5 |
  12  |    6    5    5    5    5    5    6 |
  13  |    5    5    5    5    5    5    5 |
  14  |    4    4    5    5    4    5    4 |
  15  |    5    5    5    6    6    5    6 |
  16  |    6    7    6    7    6    6    6 |
  17  |    5    5    6    5    6    6    5 |
  18  |    5    6    6    6    6    5    6 |
  19  |    6    6    6    5    6    5    5 |
  20  |    5    5    5    5    5    5    5 |
  21  |    5    5    5    5    5    5    4 |
  22  |    5    5    5    5    5    5    5 |
  23  |    5    5    5    5    5    5    5 |
  24  |    4    4    4    4    4    4    4 |
  25  |    4    4    4    4    4    4    4 |
  26  |    5    5    5    7    5    5    5 |
  27  |    4    4    4    3    4    3    3 |
  28  |    4    5    5    4    0   10    5 |
  29  |    6    6    6    6    6    6    6 |
  30  |    5    5    7    6    7    7    6 |
  31  |    6    6    6    6    6    6    6 |
  32  |    6    5    5    5    5    5    5 |



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 2.1491.0   GPS week: 1491   Day: 0   MJD: 54681.000                            

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  212|    0     1     1    17    35   -50  -.20   10   10 |      43    -447     17    103
        |                     35    11                       |
emr   75|    0     0    -6  -125    52    -3   .46   14   14 |    2391   -1286     17    156
        |                      7    -6                       |
esa  111|    1     0     4    -8   -26    10   .28   11   11 |   -8992   -2322     20    142
        |                     11    38                       |
gfz  198|    0     1    -2   -11    93    86  -.16   14   14 |     530    -711     22    129
        |                     17     7                       |
grg   80|   -1     0     2     8    60   -90  1.08   30   29 |      57    -500     87    236
        |                     63     7                       |
igr  n/a|    0     1     2    -2    24   -35   .07    5    5 |    7320    -680     21     76
        |                      3    -2                       |
jpl  120|    4     0     1   -33   -27     9   .51   14   14 |    3294   -1145     18     88
        |                     32    20                       |
mit  257|   -1     0    -3    10   -46     7  -.26   10   10 |     237    -864     20    134
        |                      4    51                       |
ngs  230|    0     0     3    63    11   -83  -.30   12   10 |      72    -517   2427   3721
        |                    -33   -89                       |
sio  109|   -4     2     1   108  -128    30  -.22   23   21 |     ---     ---    ---    ---
        |                    -48    39                       |

Table 2.1491.1   GPS week: 1491   Day: 1   MJD: 54682.000                            

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  212|    0     1     2    19    24   -36  -.19   10   10 |    -623    1642     14    101
        |                     20   -21                       |
emr   75|    2     1    -3   -92    82    13   .36   15   15 |    1452    2027     18    170
        |                    -38   -44                       |
esa  111|    0     0     2     7   -23     5   .29   11   11 |   -9448    2998     21    142
        |                    -27    42                       |
gfz  198|    0     1    -3   -10    68    97  -.14   14   14 |      -1     567     23    131
        |                      5    -1                       |
grg   80|    0     3     0    30    38    81  1.01   32   31 |    -606    1588     92    276
        |                     48   -20                       |
igr  n/a|    1     0     1    14     9   -49   .08    5    5 |    6990    2476     22     82
        |                      9    -9                       |
jpl  120|    1    -1     1   -27   -22   -24   .46   13   13 |    2553    1923     20     97
        |                     -9    10                       |
mit  257|   -2    -1     0   -35   -63     8  -.27   10    9 |    -437     986     21    143
        |                     13    31                       |
ngs  230|    1    -1     1    89    14   -76  -.24   10   10 |    -614    1590   2284   4250
        |                     52   -28                       |
sio  109|   -2     1     2    99  -125    28  -.18   21   19 |     ---     ---    ---    ---
        |                    -54    39                       |

Table 2.1491.2   GPS week: 1491   Day: 2   MJD: 54683.000                            

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  212|    1     0     0    13     2   -28  -.21    9    9 |   -1003    -340     18    137
        |                     49     2                       |
emr   75|    0     3    -2   -99    98     0   .38   13   13 |    2570     546     16    167
        |                    -10   -64                       |
esa  111|    0     0     3   -17   -47    -5   .34   11   11 |   -9857    -364     25    146
        |                     22    17                       |
gfz  198|    0     0    -3     2    96    65  -.14   13   13 |    -489     764     25    127
        |                     13   -14                       |
grg   80|    0     0     0    31    22    16  1.09   31   31 |   -1007    -355     88    318
        |                     62   -12                       |
igr  n/a|    1     0     1    12     0   -37   .09    5    5 |    8521     960     31     85
        |                      5   -23                       |
jpl  120|    0    -1     0   -58   -33    20   .45   13   13 |    3553     241     23    103
        |                     27     9                       |
mit  257|    0    -2    -1    10   -70     5  -.28   11   11 |    -279     637     26    129
        |                    -15    46                       |
ngs  230|    0     0     1    70     4   -68  -.28   11    9 |   -1068    -241   2571   4285
        |                     31  -112                       |
sio  109|   -1     0     2   125  -106    21  -.16   21   20 |     ---     ---    ---    ---
        |                    -46    67                       |

Table 2.1491.3   GPS week: 1491   Day: 3   MJD: 54684.000                            

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  212|    0     0     0    11    14   -34  -.21    9    9 |   -1424     865     14    115
        |                     44   -15                       |
emr   75|    2     4    -2  -115    65     5   .37   15   15 |    2453   -1835     17    150
        |                     -4   -40                       |
esa  111|    0    -1     5   -28   -42     7   .35   11   11 |   -8967    1064     21    149
        |                     50    15                       |
gfz  198|    0     0    -3    20    71    52  -.10   13   13 |      22     296     22    150
        |                     10   -10                       |
grg   80|    2    -3     1    59    30   -14  1.12   33   33 |   -1539     978   4127 999999
        |                     54  -111                       |
igr  n/a|    0     0     2     2     0   -54   .08    5    5 |    8908   -1123     24     66
        |                    -27   -21                       |
jpl  120|    2     3     0   -44   -18    24   .50   15   15 |    3271   -1750     18     99
        |                     15   -12                       |
mit  257|    0    -3    -1    14   -76    22  -.26   12   11 |    -318    -520     19    101
        |                    -29    34                       |
ngs  230|   -1     0     2    44    31   -55  -.20   10    9 | 9999999 -999999   1986   3605
        |                     24  -121                       |
sio  109|    0    -2     2   105  -120    22  -.18   21   18 |     ---     ---    ---    ---
        |                    -49    67                       |

Table 2.1491.4   GPS week: 1491   Day: 4   MJD: 54685.000                            

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  212|    0     0     0    23     8   -42  -.21   12   10 |     733   -2061     18    127
        |                     18   -23                       |
emr   75|    0     2    -3  -106    73    18   .39   16   16 |    1570    -767     18    144
        |                      6   -28                       |
esa  111|    0     0     7    -5   -10    26   .32   11   11 |   -8072   -2419     23    155
        |                      8    17                       |
gfz  198|   -1     0    -2   -24    73    -9  -.09   13   13 |     676   -2110     25    135
        |                     13   -14                       |
grg   80|    0    -2     2    51    15   -60  1.00   30   29 |     738   -2097     83    218
        |                    -32   -57                       |
igr  n/a|    0    -1     2    25     0     2   .11    6    6 |    9034     -39     24     90
        |                    -34    18                       |
jpl  120|    3     4    -3   -30   -38    52   .52   15   15 |    2736    -410     22    114
        |                     57     9                       |
mit  257|    0    -2    -2   -39   -71    19  -.30   11   10 |    -150    -129     17    125
        |                      6    43                       |
ngs  230|    0    -2     2   107    34   -49  -.24   11    9 | -999999 9999999   2431   3826
        |                     -4   -90                       |
sio  109|   -1     3     0    80  -136     3  -.20   21   20 |     ---     ---    ---    ---
        |                    -53    78                       |

Table 2.1491.5   GPS week: 1491   Day: 5   MJD: 54686.000                            

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  212|    0     0     0    24     9   -20  -.20   11   10 |     202   -1081     19    113
        |                     23    23                       |
emr   75|    0     1    -4  -116    22   -16   .40   16   16 |     780    -438     18    142
        |                    -24    18                       |
esa  111|    0     0     5   -44    -5   -35   .34   10    9 |   -8246    -643     21    135
        |                     11     6                       |
gfz  198|    0     0    -3     6    77   102  -.14   13   13 |     251      92     22    112
        |                     -7     9                       |
grg   80|    0     0     5    20    42    43   .96   39   30 |     191   -1092    111    234
        |                    -27    20                       |
igr  n/a|    0     0     2    15    -9   -37   .02    5    5 |    8993      70     22     86
        |                    -48     3                       |
jpl  120|    1     1    -3   -43   -43    13   .55   14   14 |    2509    -322     21     89
        |                     -4    17                       |
mit  257|    0     0    -2     0    15    -7  -.32   11   10 |    -223     257     20    115
        |                    -14    -8                       |
ngs  230|    0    -1     4    86   -29   -37  -.29   10    8 |     191   -1092   2173   3586
        |                    -31    -7                       |
sio  109|   -1     1     1    42  -128    21  -.25   21   21 |     ---     ---    ---    ---
        |                     -5   113                       |

Table 2.1491.6   GPS week: 1491   Day: 6   MJD: 54687.000                            

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  212|    0     1    -1    11    34   -30  -.19   11   10 |      79   -1242     19    116
        |                      0    -2                       |
emr   75|    1     1    -6  -130    22    -1   .35   17   17 |     881    -403     18    160
        |                     27    42                       |
esa  111|    0    -1     6   -33     5    -4   .35    9   10 |   -9329    -542     24    121
        |                    -10    37                       |
gfz  198|    2    -1    -1     1    92    85  -.13   13   13 |      42    -137     25    122
        |                     -4    -1                       |
grg   80|    0     1     2    16    44    78  1.01   39   31 |      70   -1259    110    250
        |                    -97   -11                       |
igr  n/a|    0    -1     4    12     0   -54   .01    6    6 |    9634    -256     24     63
        |                    -45    38                       |
jpl  120|    0     1    -4   -32   -39   -34   .56   14   14 |    2728    -623     23     98
        |                      7    26                       |
mit  257|    1     0    -2   -61   -22    23  -.33   11    9 |     118    -582     25    106
        |                      4    22                       |
ngs  230|   -1     0     3   131   -10   -41  -.30    9    8 |      31   -1235   2580   4270
        |                    -64   -32                       |
sio  109|   -1     3     2    28  -128    11  -.19   22   20 |     ---     ---    ---    ---
        |                     -1    77                       |

       
       
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 3.1491.0   GPS week: 1491   Day: 0   MJD: 54681.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |   10   15   11    9   46    5   11   12   10   38    5 |    23   31   28   22   31   23   26   25   28   30    24
   3  |    7   12   12   10   24    6   10   10   10   22    4 |    23   25   30   28   26   27   27   24   26   25    23
   4  |   10    9   10   14   23    5   10    7    9   31    4 |    34   41   42   34   52   38   41   36   39   36    37
  X5E |   13   17   12   15   47    5  ---    8   13   19    5 |   136  134  135  127   37  139  ---  137  138   19   137
   6  |    7   10   10    8   18    4   10    8   10   20    3 |    13   20   20   18   24   17   19   15   17   18    14
   7  |   10   14   12   28   23    6   14   13   12   21    6 |    17   32   25   36   40   23   32   21   23   24    21
   8  |    8   10    8   10   21    5    9   13   12   24    4 |    26   27   28   26   24   24   28   32   28   37    27
   9  |    9   11   10   10   22    4    8    6   12   13    3 |    15   21   18   18   20   17   19   19   21   17    16
  10  |    8   14   10   10   29    5    9    7   11   21    4 |    17   27   24   23   29   19   17   22   21   30    20
  11  |    9   11   10   11   24    8   11    7   15   18    4 |    39   42   44   35   42   35   44   39   36   32    38
  12E |   12   18   12   20   28    6   18    9   15   17    5 |    16   29   17   28   24   20   28   18   19   28    17
  13  |    8   11   13   14   33    4   14   15   11   13    4 |    11   25   20   19   40   14   25   18   15   16    14
  14  |    9   16    9   10   28    5   14   10    8   17    4 |    11   25   16   19   31   16   22   13   18   21    14
  15  |   10   15   12   13   34    6   17   10   15   24    5 |    15   27   20   21   34   17   22   21   20   30    18
  16E |   10   21   15   10   26    6   22   15   15   20    6 |    20   31   21   21   19   19   29   21   22   22    19
  17  |    9   17   12   20   36    7   14    9    9   24    5 |    20   38   25   36   56   27   37   23   21   25    25
  18  |   10   17   16   12   21    5   15    9   12   23    5 |    20   32   18   29   36   24   25   21   22   25    21
  19  |   15   18   14   15   25    6   16   13   14   28    6 |    16   32   18   27   33   17   27   16   17   26    17
  20  |    9   14   13   15   29    3   13    8   14   12    4 |    10   23   16   22   39   14   23   12   12   12    13
  21  |   12   14    9    8   38    6   14    9   10   30    4 |    23   31   32   25   32   25   28   26   25   31    25
 X22  |    7   17   10   13   26    6  ---    8   10   18    4 |    14   29   18   25   37   18  ---   16   17   26    17
  23  |    9   16   11    9   30    5   17    9   13   18    4 |    11   29   17   18   37   16   28   15   12   15    14
  24  |    8   12    6   10   44    5    8    5    9   20    3 |    27   25   26   26   27   26   24   24   28   23    25
  25  |    8    8    8   10   20    4    8   12    9   26    4 |    12   24   21   21   23   18   22   20   19   28    17
  26  |    8   18   12   11   37    5   11   14   12   23    5 |    31   40   35   37   50   37   39   37   34   36    33
  27  |   13    7    8   10   21    5    9   10   12   24    4 |    14   24   24   22   28   22   26   22   25   27    20
  28E |   11   11   11   12   22    4   15    9   10   13    4 |    13   20   15   15   28   13   18   14   15   15    12
  29  |   15   18   16   18   38    7   20   10   13   23    6 |    22   41   30   36   52   27   40   23   26   20    27
  30E |   14   16   11   16   54    4   15   11   11   19    5 |    55   57   54   60   56   55   55   55   56   56    55
  31  |   12   18   12   19   24    5   19   10   13   20    5 |    14   30   19   25   38   17   29   14   15   17    15
  32  |    9   15   12   17   22    5   13    9   13   33    5 |     9   23   19   21   25   14   20   16   14   30    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   14   11   14   30    5   14   10   12   23      |T   23   33   28   29   34   26   28   26   26   25    25
 WRMS |   10   14   11   14   29    5   14   10   10   21      |NE  18   29   24   25   34   22   27   21   22   25    21
 MEDI |    9   15   11   12   26    5   14    9   12   21      |MD  17   29   21   25   33   20   27   21   21   25    20

Table 3.1491.1   GPS week: 1491   Day: 1   MJD: 54682.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    6   10    6    9   38    5    9    9   11   37    4 |    13   17   15   13   21   13   19   17   20   25    13
   3  |    7   13   12   11   21    3    9    8   10   20    4 |    25   29   26   25   24   25   26   25   26   27    24
   4  |   12    8    7   14   27    8    8   16   11   27    5 |    37   43   42   37   51   39   41   43   41   36    38
  X5E |   11   19    9   18   52    7  ---    9   10   24    5 |   109  113   96   95   32  110  ---  107  109   18   109
   6  |    7   12   11   10   16    4    7   10   10   17    4 |    15   19   18   14   21   14   17   14   17   17    13
   7  |    9   14   12   16   33    5   14    9   10   22    4 |    12   28   19   27   38   18   27   15   15   19    16
   8  |   11    8    8   11   32    6    8    7    9   18    3 |    21   24   24   23   33   24   25   25   22   26    22
   9  |    8   12   11    9   32    3    7    8   11   16    4 |    14   21   14   18   22   14   17   19   16   22    14
  10  |    9   14    9   12   25    6    9    7   12   20    4 |    14   23   17   19   19   14   18   18   17   24    14
  11  |    8   13    8   13   50    5   11    9   12   17    4 |    27   31   25   23   32   26   31   26   30   23    25
  12E |   13   17   11   10   18    4   14   10   12   18    4 |    13   26   15   16   25   14   19   15   15   21    12
  13  |    9   15   14   13   38    4   13   10   10   16    4 |    24   36   28   28   42   26   32   30   25   33    26
  14  |    8   15    8   10   33    5   15    9   10   17    4 |    11   25   18   17   35   14   19   13   16   21    14
  15  |   10   23   13   12   31    6   14    9    9   22    5 |    15   31   20   20   33   18   21   16   16   29    16
  16E |   11   28   17   10   28    5   23   14   11   17    6 |    17   33   19   21   27   19   28   18   22   23    18
  17  |   10   15   12   21   35    6   14    9    9   21    5 |    15   34   23   30   47   21   32   18   19   19    20
 X18  |    8   20   13   16   27    6  ---   10    9   22    5 |    11   28   16   21   33   15  ---   16   15   22    14
  19  |   11   16   14   18   25    5   18   11   11   28    5 |    12   27   16   26   36   16   26   14   16   23    14
  20  |    8   13   16   17   27    5   17    9   11   14    5 |    10   22   15   21   38   14   23   10   15   12    10
  21  |   11   13    9   10   30    7   12    8    8   30    4 |    14   24   19   16   26   16   24   18   16   23    16
 X22  |    8   18   11   15   31    4  ---    7   11  ---    5 |    11   27   16   23   36   14  ---   14   14  ---    14
  23  |    9   20   13    8   26    5   19    9   11   16    5 |    10   29   16   17   29   14   26   12   15   13    13
  24  |    9   10    6   10   24    3    7    5    8   19    3 |    19   22   20   19   21   18   20   18   19   18    18
  25  |    7    8   10    8   20    4    7    8    9   27    4 |    14   21   18   16   23   16   20   16   19   27    15
  26  |   10   20   10   13   29    5   10   15   10   17    5 |    45   54   50   50   53   49   48   51   46   54    47
  27  |   11    7    9    9   30    4    7    7    9   23    3 |    11   18   17   14   25   15   18   16   15   22    13
  28E |    9   12   11   16   20    6   14    9    9   15    4 |     9   19   14   16   29   13   17   13   16   18    11
  29  |   15   18   14   20   32    4   18    9   10   22    6 |    18   36   26   32   46   23   35   17   21   17    22
  30E |   13   15    9   17   67    5   14   12   10   20    5 |    44   42   44   45   38   43   41   50   48   41    43
  31  |   12   19   13   20   40    5   20    9   10   20    5 |    15   29   19   24   41   18   28   15   19   17    15
  32  |    9   14    9   16   33    6   14   10   10   26    5 |    12   21   15   20   27   13   19   15   17   28    12
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   10   15   11   14   32    5   13   10   10   21      |T   20   30   23   25   32   22   25   23   23   23    21
 WRMS |   10   15   11   14   31    5   13    9   10   19      |NE  17   27   21   22   32   19   25   19   20   23    18
 MEDI |    9   14   11   13   30    5   13    9   10   20      |MD  14   27   19   21   32   16   24   17   17   22    15

Table 3.1491.2   GPS week: 1491   Day: 2   MJD: 54683.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    5   10   11    8   53    7    8   11   12   38    5 |    16   21   21   16   25   16   17   18   21   27    16
   3  |    6   10   10   12   24    5    9   10   13   19    4 |    15   22   15   22   25   18   20   14   20   24    16
   4  |    7   12   10   11   56    6   11   10   11   29    4 |    23   32   33   27   38   28   32   29   25   31    26
  X5E |   16   24   11   17   51    8  ---   17   11  ---    7 |   105  115  126  116   41  109  ---  109  106  ---   108
   6  |    7    9    9   10   24    5    8   11   11   16    3 |     9   18   12   15   26   12   16   10   16   17    11
   7  |   11   15   13   15   24    6   14   10   10   18    5 |    10   30   19   25   36   18   26   12   17   15    15
   8  |   10   11    9   10   34    6    8   13   10   17    4 |    14   18   16   18   27   15   18   17   15   17    15
   9  |    8   10    8    8   23    4    9   10   10   13    3 |    14   17   14   15   18   14   16   18   19   16    13
  10  |    8   10   10   12   28    6    7   10    9   18    4 |    10   19   16   18   22   14   17   15   15   20    13
  11  |    8   11   10   12   36    7   12   11   10   13    4 |    28   34   31   26   31   24   32   31   26   26    27
  12E |   11   15   14   11   37    5   17   11   13   16    5 |    12   28   22   19   31   20   27   19   22   28    17
  13  |    9   14   13   12   27    4   13   10    9   15    4 |     8   25   16   20   40   13   22   12   13   14    11
  14  |    8   12   10    9   22    4   16   13   12   17    4 |     7   22   18   15   33   12   18   12   11   17    10
  15  |   12   16   11   12   25    4   14   11    9   21    5 |    15   27   19   20   30   16   22   15   17   27    16
  16E |   12   23   15   11   24    7   21   14   12   18    6 |    16   32   18   23   26   21   29   18   22   23    19
  17  |    8   14   10   18   31    7   15   13   15   26    5 |    19   35   24   31   52   24   35   17   20   26    22
 X18  |    9   19   13   15   31    5  ---   11   10  ---    5 |    13   27   15   23   33   16  ---   12   11  ---    13
  19  |   10   16   10   16   30    5   17   12   11   27    5 |    11   27   17   28   39   16   26   14   14   21    16
  20  |    9   14   16   17   27    5   14   11   10   13    5 |    10   23   15   22   34   13   21   11   16   11    11
  21  |   11   10    8   10   27    4   12   10    7   30    4 |    19   26   22   19   25   21   25   21   16   24    19
 X22  |    8   13   11   15   35    5  ---   10    9   17    4 |    10   24   17   21   35   14  ---   11   11   18    12
  23  |   10   15   15    8   26    4   19   12    9   17    5 |     8   26   17   15   29   12   24   13   12   13    10
  24  |    9    9    6   10   26    5    9   11    7   18    3 |    21   20   20   20   19   21   19   20   21   17    19
  25  |    8   10   10    7   16    5    8    8    8   23    3 |    16   23   23   20   24   21   22   22   21   27    18
  26  |   11   17   12   12   25    6   10   13   11   14    4 |    36   48   44   44   39   41   44   47   40   47    42
  27  |    8    9    9    9   32    5    8    8    8   17    3 |    13   16   17   18   24   16   17   14   19   15    14
  28E |    7   10   13   17   18    5   12   12   11   12    4 |    10   19   17   17   28   14   16   11   17   15    11
  29  |   14   18   16   19   29    5   21   12   15   22    6 |    19   36   26   31   46   25   37   19   20   17    22
  30E |   12   15   12   27   48    8   16   18   12   22    6 |    69   67   68   76   58   67   66   73   71   69    69
  31  |   10   14   14   18   34    4   19   12   12   17    5 |    12   27   17   23   37   16   27   13   16   12    14
  32  |    8   12   10   15   23    7   13   12    8   25    4 |     8   18   14   20   24   12   19   14   15   25    11
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   13   11   13   31    5   13   11   11   21      |T   19   29   24   26   32   22   25   21   22   22    21
 WRMS |    9   13   11   13   31    5   13   11    9   20      |NE  14   25   19   22   31   18   23   17   18   20    16
 MEDI |    9   13   11   12   27    5   12   11   10   18      |MD  14   26   18   20   31   16   22   15   17   20    16

Table 3.1491.3   GPS week: 1491   Day: 3   MJD: 54684.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    6   13    7    9   38    5   12   12   11   36    5 |    21   26   22   22   23   22   24   23   22   29    21
   3  |   10   10   11    8   29    7   10   11    9   19    4 |    18   29   23   23   27   21   24   25   21   31    22
   4  |    5   12   10   10   46    4   12   12   11   27    4 |    26   34   33   28   32   30   33   28   28   30    27
  X5E |   28   31  ---  ---  ---   21  ---   18   29  ---   15 |    94   83  ---  ---  ---   86  ---   84  106  ---    90
   6  |    6    9    9    8   24    6   10   10    9   15    3 |    15   22   17   18   26   17   19   18   17   20    16
   7  |    9   16   11   14   33    5   14    9    9   17    4 |    15   30   21   27   41   22   30   18   18   20    19
   8  |    8    8    6    9   33    4    9   13    9   16    3 |    22   24   26   25   33   25   24   27   22   28    23
   9  |    8   10    8    8   21    5   11    9    9   14    3 |    18   19   18   19   24   17   19   18   22   15    17
  10  |    7   12    9   11   28    5    9   10    8   16    3 |    17   24   18   22   25   16   21   19   17   21    17
  11  |    8   12   11   13   33    6   11   10    8   13    4 |    33   39   42   36   33   32   37   36   34   32    34
  12E |   11   15   13   14   34    5   19   11    8   15    5 |    16   27   18   22   32   16   25   17   15   24    15
  13  |    9   15   14   12   30    5   15   12    8   11    4 |    18   29   25   26   44   19   25   23   19   22    20
  14  |    8   18    8    9   33    4   16   13    8   17    4 |    15   30   21   22   40   17   22   17   15   22    17
  15  |    9   16   14   12   24    6   19   11   14   27    5 |    15   23   16   20   36   14   21   15   18   34    15
  16E |    9   30   14   11   26    4   26   16   12   17    6 |    22   40   23   24   29   22   33   19   22   25    22
  17  |    8   16   11   17   33    6   16   10    7   25    5 |    22   35   26   33   48   26   35   20   21   26    24
 X18  |   12   19   10   18   28    5  ---   13   10   21    6 |    19   31   18   25   34   19  ---   17   18   23    18
  19  |   12   17    9   15   34    6   16   11   12   25    5 |    17   32   19   30   34   21   29   22   18   25    21
  20  |    8   16   19   16   31    7   16   13   11   13    5 |    14   27   19   26   41   16   24   16   18   17    16
  21  |   13   12    8    9   26    6   14    8    8   29    4 |    22   31   29   23   29   25   29   24   24   28    24
  22  |    8   13    9   15   21    5   14   12   10   18    4 |    15   28   18   25   36   18   22   14   15   20    17
  23  |   10   21   14    8   28    5   21   13   10   16    5 |     9   32   15   16   32   14   27   14   13   13    13
  24  |   11   10    7   10   23    6   13   10   10   17    4 |    24   29   26   25   26   28   28   26   30   23    26
  25  |    7    8    8    9   29    3    7    7    6   23    3 |    22   28   25   24   28   24   28   23   24   28    24
  26  |    9   20   15   12   36    5   15   15   13   42    6 |    92   98  103   99   99   99   97  101   96  103    97
  27  |    9    9    6    9   36    4    8    7    8   13    3 |    12   18   20   19   27   17   21   18   18   15    16
 X28E |    8   12    7   14   25    6  ---   10    7   15    4 |    10   21   13   17   25   16  ---   12   13   18    14
  29  |   14   17   15   19   34    5   23   12   12   20    6 |    22   39   28   37   50   26   39   22   24   19    26
  30E |   12   19   12   21   64    7   18   20   12   21    6 |    70   71   69   71   57   68   69   69   68   73    69
  31  |   11   18   11   18   32    7   20   13   10   18    5 |    17   33   21   29   38   23   32   19   18   18    20
  32  |    9   13   12   15   26    9   15   13   12   26    5 |    14   21   16   20   25   13   21   16   19   27    14
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |    9   15   11   13   33    5   15   12   10   21      |T   24   33   26   28   35   26   30   26   26   27    26
 WRMS |    9   15   11   13   33    5   15   11    9   18      |NE  21   31   25   27   35   24   29   24   23   26    23
 MEDI |    9   15   10   12   30    5   14   12   10   17      |MD  18   29   21   24   32   21   25   19   19   23    20

Table 3.1491.4   GPS week: 1491   Day: 4   MJD: 54685.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    7   13   10    9   27    7   10   10   11   37    5 |    21   26   27   24   22   22   23   25   24   28    22
   3  |   35   12   10   10   25    7   12   13   13   27    7 |    32   24   25   22   20   21   24   21   27   21    19
   4  |    8   10   11   12   23    9   10   12   10   30    4 |    26   33   38   29   26   34   31   26   32   28    28
  X5  |   17   20   15  ---  ---    9  ---   15   16  ---    8 |    75   77   63  ---  ---   71  ---   73   69  ---    72
   6  |    6   11    8    9   20    6   11   10    8   16    3 |    14   20   20   18   24   18   19   18   17   15    15
   7  |    9   14   10   15   37    5   15   11   12   17    4 |    14   25   17   25   39   17   30   13   14   16    14
   8  |    7   10    9    8   34    5    9   11   11   10    3 |    15   18   19   19   22   18   19   23   20   15    16
   9  |    7   12   10   10   25    5   11    7    9   14    3 |    19   21   23   23   20   21   19   20   22   18    19
  10  |    8   16    8   12   32    6    9    8   10   19    4 |    14   26   20   23   23   20   19   20   21   18    17
  11  |   10   13    9   13   30    4   13    9    9   15    4 |    32   35   38   30   34   31   33   29   30   24    30
  12E |    9   18   15   14   28    6   18   12   10   16    5 |    11   30   19   24   30   17   25   17   14   21    15
  13  |   10   16   11   12   30    6   14   13   10   11    4 |    11   24   16   19   36   17   25   14   18   16    12
  14  |    8   13    9    9   32    5   15   12   11   15    4 |    11   23   18   17   33   15   21   12   14   19    13
  15  |   12   16   14   11   30    5   18   11   13   24    5 |    22   28   27   26   38   25   26   23   23   33    22
  16E |   12   24   11    8   27    6   25   15    9   19    5 |    16   33   19   21   36   21   31   16   18   23    18
  17  |   10   17   20   22   38    7   16   12   13   24    6 |    20   36   34   34   49   28   36   18   24   26    25
  18  |   13   17   11   14   29    4   17   13   12   21    5 |    17   31   20   24   33   20   33   15   18   20    18
  19  |   12   16   10   15   27    7   18   13   16   25    5 |    17   30   21   26   32   23   30   17   23   20    19
  20  |    8   14   13   17   38    6   16   12    8   11    4 |    12   22   18   23   39   14   23   12   15   15    13
  21  |   12   14    6    7   28    4   14    9   10   28    4 |    17   28   26   23   41   23   27   22   21   22    22
  22  |    8   15   11   13   19    5   13   13   10   17    4 |    12   27   19   23   31   18   24   14   18   21    16
  23  |    9   18   11    9   40    6   20   14   10   16    5 |    12   28   17   18   36   16   29   16   18   17    14
  24  |    9   14    6   13   25    4   14    8    8   19    4 |    20   24   23   26   25   23   21   21   23   16    20
  25  |    7   11    6    8   21    3    7    8   12   21    3 |    13   18   16   15   24   14   20   13   12   25    13
  26  |   13   22   13   11   21    8   15    9   11   20    5 |    38   48   38   39   45   42   46   36   41   30    37
  27  |   10   10    6    8   27    4    9    7   10    9    3 |    13   16   16   18   20   17   21   17   14   12    13
 X28E |    4  ---  ---  ---  ---   69  ---  ---  ---  ---    0 |    17  ---  ---  ---  ---  203  ---  ---  ---  ---     9
  29  |   15   18   13   16   34    6   22   12   15   21    6 |    21   35   27   35   46   27   40   19   25   17    24
  30E |   11   27   15   16   49    7   19   19   13   35    7 |   101  104  107  101   99  102   98  103  103   96   101
  31  |   13   19   13   19   26    8   19   11   11   18    5 |    13   30   17   24   37   20   28   13   12   15    14
  32  |    9   15    8   16   22    6   16   11    9   28    5 |    11   19   14   20   24   14   22   15   20   28    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   12   16   11   13   30    6   15   11   11   21      |T   22   31   26   26   33   31   29   23   25   23    22
 WRMS |   10   16   11   13   29    6   15   10    9   20      |NE  17   26   22   23   31   21   26   18   20   20    18
 MEDI |    9   15   10   12   28    6   15   11   10   19      |MD  17   27   20   23   33   21   25   18   20   20    18

Table 3.1491.5   GPS week: 1491   Day: 5   MJD: 54686.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    8   13    8   11   26    6   12   10    8   34    4 |    20   23   23   19   28   19   21   19   17   26    18
   3  |   16   14    7   12   29    5   10   11    9   24    4 |    29   30   27   24   32   24   26   23   23   33    24
   4  |    8   12    9    9   20    5    8   11    8   28    4 |    19   22   24   19   39   19   25   15   17   22    17
  X5  |   15   21   14   21  ---   10  ---   17   18  ---    8 |    48   53   46   72  ---   50  ---   50   48  ---    49
   6  |    8   13    6    8   18    4    9   13   10   17    4 |    11   25   20   16   24   16   20   15   21   19    15
   7  |   11   15   10   17   36    6   15   10   12   18    5 |    14   30   20   23   40   18   29   15   12   18    15
   8  |   11   13    5    9   32    4   10    9    8   13    3 |    19   21   22   20   27   20   23   20   18   17    19
   9  |    7   11    8   10   28    4   10   12    8   16    3 |    12   18   16   13   24   13   16   17   14   15    12
  10  |    7   12    6   13   31    7    7    9   10   15    3 |    17   24   21   18   27   18   21   22   21   20    17
  11  |   10   13    9   12   37    7   12   10    9   16    4 |    22   32   30   26   32   23   31   23   20   22    23
  12E |    9   18   16   14   49    5   18   13   11   14    5 |    13   28   18   21   35   16   23   23   14   20    15
  13  |    8   17    9   11   31    6   14   16   10   15    4 |    15   27   22   20   44   19   25   20   21   21    17
  14  |   10   16    9   11   24    4   15   11   10   14    4 |    12   25   19   17   30   15   21   15   17   17    14
  15  |   11   16   10   13   44    5   16   12   11   30    5 |    24   32   28   29   56   26   32   30   29   44    27
  16E |   12   24   10   10   33    5   20   15   11   22    5 |    15   30   19   20   30   16   25   14   17   24    15
  17  |   10   19   14   16   33    8   17   10   10   23    5 |    21   35   27   29   48   26   38   21   23   23    23
  18  |   12   19   12   16   27    4   15   13    9   21    5 |    14   30   21   22   33   18   28   14   19   20    16
  19  |   10   19   12   15   20    6   16   10   11   24    5 |    14   32   24   27   36   21   31   20   17   22    19
  20  |    9   20   13   16   39    7   16   13   11   11    5 |    12   25   17   21   39   13   24   12   13   12    12
  21  |   10   14    7   10   33    6   14    8    9   27    4 |    19   30   28   20   39   22   28   21   22   22    21
  22  |    9   14   11   15   23    5   13   11    7   17    4 |    12   27   21   22   35   18   24   16   15   21    16
  23  |   10   20   12    7   38    6   19   12   10   18    5 |     9   29   18   17   35   14   26   15   14   13    13
  24  |    9   13    6   12   36    6   11    8    7   18    3 |    17   19   19   16   16   18   16   18   18   15    15
  25  |    7   12    6    9   20    4    9    8    8   27    3 |    16   22   21   22   26   20   22   18   21   29    18
  26  |   10   22   10   13   33    5   13   13   13   20    5 |    47   52   50   50   47   49   47   52   48   55    48
  27  |    8   11    4    9   25    5    9    7    9   12    3 |    15   19   17   19   24   17   20   16   16   13    15
 X28E |   18  ---   21  ---  ---   12  ---   14   16  ---   10 |    15  ---   22  ---  ---   29  ---    9   21  ---    15
  29  |   14   20   14   18   29    5   20   10    9   19    5 |    19   36   25   31   42   23   34   20   21   15    22
  30E |   20   22   13   24  130    6   19   17   12   30    7 |   105  105  100  103  107  103   98  110  106  110   103
  31  |   14   18   11   19   41    5   17   11   11   19    5 |    13   29   20   26   40   18   29   15   17   15    16
  32  |    9   12    8   18   20    5   13   11   10   28    5 |     9   19   17   20   24   13   21   15   17   27    13
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   16   10   13   39    5   14   11   10   21      |T   20   30   25   26   36   23   28   23   23   25    22
 WRMS |   10   16    9   13   30    5   14   10    8   21      |NE  17   27   22   22   33   19   25   19   19   21    18
 MEDI |   10   15   10   12   31    5   14   11   10   19      |MD  15   28   21   21   35   19   25   18   18   21    17

Table 3.1491.6   GPS week: 1491   Day: 6   MJD: 54687.000                            

        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
------+--------------------------------------------------------+---------------------------------------------------------
   2  |    9   14    8    9   34    6   11    8    9   35    4 |    22   25   27   23   24   22   24   24   24   27    22
   3  |   27   16    7   10   25    7    9   14    9   22    5 |    29   21   16   19   23   15   19   17   17   24    15
   4  |    8   10    7   11   26    5    5    8    8   29    4 |    29   33   38   30   29   33   34   28   32   33    30
  X5  |   12   21   17   21  ---   11  ---   13    8  ---    7 |    54   62   49   48  ---   56  ---   54   56  ---    55
   6  |    8   13    7    9   18    7    8   10    8   16    3 |    15   20   19   17   27   17   20   13   19   20    15
   7  |   10   17   11   18   34    6   19   10    8   22    5 |    15   29   20   27   41   17   33   15   14   21    17
   8  |    8   13    7    9   36    4    9    8    6   14    3 |    19   23   22   21   40   21   25   22   17   14    19
   9  |    8   14    8    8   14    6    8    8    7   16    3 |    19   21   19   18   22   18   19   19   18   17    16
  10  |    8   15    7    9   29    7    8   11    9   16    3 |    12   23   13   17   24   14   19   15   14   19    12
  11  |   10   16    9   13   41    7   13    8   10   19    4 |    40   41   45   39   35   37   41   38   39   31    38
  12E |   10   20   11   13   71    7   14   20   12   16    5 |    18   28   17   24   34   19   23   23   20   24    17
  13  |    7   15   11   13   35    7   11   17    7   14    4 |    13   23   19   19   40   15   24   21   18   18    16
  14  |    8   15    6   12   33    6   12   11   10   16    4 |    17   25   23   23   38   21   24   18   23   23    20
  15E |   10   16   11   12  119    5   18    9   10   34    5 |    33   38   37   36  106   32   40   36   34   35    34
  16E |   12   24   12   12   33    6   23   18   10   19    6 |    24   34   19   26   25   22   34   19   22   24    21
  17  |    9   19   11   17   33    7   15   10   11   24    5 |    21   38   25   32   54   25   38   20   20   25    23
  18  |   14   19   12   16   23    4   17   12    8   21    5 |    19   31   19   26   36   18   29   14   19   19    18
  19  |   12   21   10   14   27    5   17   10   10   24    5 |    17   34   19   26   36   19   32   16   15   22    18
  20  |   10   19   11   15   26    5   15   13   12   11    5 |    14   26   18   23   39   14   25   13   16   13    14
  21  |   11   14    7    9   34    5   11    8    9   28    4 |    25   31   32   24   30   26   28   26   26   25    25
  22  |    9   17   10   15   22    4   15   11    8   17    4 |    14   28   19   24   35   17   24   14   18   17    16
  23  |    9   19   12   10   46    4   18   14   11   17    5 |    11   26   14   19   38   13   26   14   18   19    13
  24  |   10   14    5   12   24    3    9    7    8   19    3 |    28   27   29   25   18   27   25   28   25   22    25
  25  |    7   10    8   10   26    6    9    5    9   26    3 |    15   18   19   21   22   17   22   18   18   25    17
  26  |    8   26   10   12   22    4   12    9   13   12    4 |    35   41   36   37   39   37   36   38   36   37    35
  27  |    9   11    8   11   38    4    8    6    6   13    3 |    17   18   21   21   27   17   22   18   16   12    16
 X28E |    8  ---   11   14   29   15   16    8    9   16    4 |    10  ---   13   12   12   23   15   10   13    5     9
  29  |   14   22   11   17   31    4   20   11   10   19    5 |    23   42   27   34   46   25   39   21   24   19    26
  30E |   11   24   10   13   38    4   14   15    9   28    5 |    96  103  104  105  143  104  100  100  100   98    99
  31  |   12   18   10   20   32    6   16   11   10   24    5 |    22   32   23   30   40   25   34   19   24   28    22
  32  |   10   16    9   14   21    7   16   12   12   25    5 |     9   19   13   18   24   12   21   15   18   27    12
------+--------------------------------------------------------+---------------------------------------------------------
 RMS  |   11   17    9   13   39    6   14   11    9   22      |T   23   32   26   27   38   25   29   24   24   24    23
 WRMS |   10   17   10   13   31    6   14    9    8   20      |NE  20   27   23   24   33   20   27   20   21   22    20
 MEDI |   10   16   10   12   31    6   13   10    9   19      |MD  19   28   20   24   35   21   25   19   19   22    18



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 4.1491   GPS week: 1491   MJD: 54681.0-54687.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2974 |U    9    13    30 |U    6     6    20 |U    7     8    23 |
emr | emr 2928 |    10    14    36 |U    6     7    25 |    10    11    27 |
esa | esa 2948 |     9    14    32 |U    6     6    22 |    27    23    49 |
gfz | gfz 2811 |U   13    15    37 |U    7     9    26 |U   10    11    24 |
igr | igr 2951 |     9    14    31 |     5     7    21 |    11    11    25 |
igs | igs 2931 |     9    13    30 |     5     6    20 |     8     9    24 |
jpl | jpl 2754 |U   12    18    40 |U    6     7    23 |U   10    11    26 |
mit | mit 2962 |U    9    13    28 |U    6     8    23 |U  175   167   369 |



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 5.1491.0   GPS week: 1491   Day: 0   MJD: 54681.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     8    17    28 |     5     6    18 |    11     8    19 |
emr | emr 2968 |     9    16    35 |     6     6    25 |     9     8    18 |
esa | esa 2976 |     8    16    26 |     5     5    17 |    10     7    20 |
gfz | gfz 2864 |    14    13    43 |     6     7    24 |    10     8    19 |
igr | igr 2941 |     8    15    25 |     4     6    20 |    10     7    14 |
igs | igs 2968 |     8    15    26 |     5     5    20 |     9     7    17 |
jpl | jpl 2780 |     9    13    35 |     6     8    28 |     9     6    19 |
mit | mit 2976 |     8    14    25 |     6     6    22 |     9     6    16 |

Table 5.1491.1   GPS week: 1491   Day: 1   MJD: 54682.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2970 |    10     9    26 |     4     5    15 |     4     8    19 |
emr | emr 2962 |    10     9    36 |     5     6    20 |     6     8    26 |
esa | esa 2976 |     9     9    28 |     3     5    13 |     5     8    23 |
gfz | gfz 2858 |    10     8    32 |     5     6    22 |     7     9    22 |
igr | igr 2935 |     9     9    29 |     4     5    16 |     5     7    19 |
igs | igs 2961 |     9     8    28 |     3     5    16 |     5     8    21 |
jpl | jpl 2684 |    14    15    37 |     6     6    17 |     7     8    28 |
mit | mit 2976 |     9     8    24 |     6    12    22 |    12    16    43 |

Table 5.1491.2   GPS week: 1491   Day: 2   MJD: 54683.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2969 |    10    18    34 |     8     9    24 |     5     7    22 |
emr | emr 2963 |    12    21    38 |     5     9    28 |     6     5    21 |
esa | esa 2976 |    10    19    36 |     5     8    19 |     6     7    23 |
gfz | gfz 2859 |    18    34    36 |    12    14    39 |     5     6    22 |
igr | igr 2969 |    11    20    41 |     6     8    24 |    10    11    18 |
igs | igs 2931 |    10    20    36 |     6     9    20 |     6     7    21 |
jpl | jpl 2684 |    24    45    74 |     6     9    27 |     6     5    25 |
mit | mit 2976 |    11    20    33 |     7     7    21 |     6     6    19 |

Table 5.1491.3   GPS week: 1491   Day: 3   MJD: 54684.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     9     9    30 |     6     7    21 |     6     7    17 |
emr | emr 2972 |     9    10    28 |     6     9    30 |     7     9    21 |
esa | esa 2880 |     9     8    30 |     6     6    21 |     7     6    20 |
gfz | gfz 2773 |    12    10    36 |     9    11    32 |     9    11    16 |
igr | igr 2942 |     9     9    29 |     7     9    26 |     7     6    17 |
igs | igs 2842 |     9    11    26 |     6     8    23 |     7     7    18 |
jpl | jpl 2684 |    10    10    33 |     7     7    27 |    11    16    25 |
mit | mit 2976 |     9     8    26 |  ----  ----  ---- |   991   936  2035 |

Table 5.1491.4   GPS week: 1491   Day: 4   MJD: 54685.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |    12    17    39 |     5     7    19 |     7     6    16 |
emr | emr 2877 |    13    15    46 |     5     6    22 |    18    23    25 |
esa | esa 2880 |    12    19    43 |    12     9    48 |    36    10    46 |
gfz | gfz 2680 |    15    17    43 |     5     8    18 |    18    24    28 |
igr | igr 2957 |    12    17    37 |     4     6    19 |     9     7    22 |
igs | igs 2866 |    13    16    40 |     4     6    18 |    12    15    28 |
jpl | jpl 2782 |    13    17    42 |     5     5    20 |    17    23    21 |
mit | mit 2880 |    14    19    43 |  ----  ----  ---- |  ----  ----  ---- |

Table 5.1491.5   GPS week: 1491   Day: 5   MJD: 54686.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     8    10    24 |     6     5    19 |    11    10    38 |
emr | emr 2878 |     9    15    36 |     6     7    26 |    16    16    51 |
esa | esa 2976 |     8    11    27 |     4     5    20 |   114   117   183 |
gfz | gfz 2775 |    10    14    33 |     5     7    23 |    12    12    39 |
igr | igr 2938 |     8    11    26 |     4     6    20 |    12    12    41 |
igs | igs 2976 |     7    11    25 |     4     5    20 |    11    10    39 |
jpl | jpl 2784 |     9    12    29 |     5     5    22 |    14    15    45 |
mit | mit 2976 |     7    10    22 |     5     5    24 |    24    29    67 |

Table 5.1491.6   GPS week: 1491   Day: 6   MJD: 54687.0

CENT| CLK EPO  |        BRUS       |        TOW2       |        WILL       |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2976 |     6    12    29 |     7     6    21 |     7     9    28 |
emr | emr 2879 |    10    14    36 |     6     5    23 |     9    10    29 |
esa | esa 2976 |     6    14    34 |     6     6    19 |     8     9    29 |
gfz | gfz 2872 |    10    13    38 |     6     8    27 |     9     8    27 |
igr | igr 2976 |     8    16    32 |     4     8    22 |    25    30    42 |
igs | igs 2976 |     6    12    29 |     5     5    21 |     7     9    27 |
jpl | jpl 2880 |     7    14    31 |     6     7    22 |     9     7    20 |
mit | mit 2976 |     6    11    25 |     7     7    27 |     8    10    33 |


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 6.1491   GPS week: 1491   MJD: 54681.500-54687.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |       4     -22      -3      69     -2 |       0     14
            |      14      10      51      24      2 |       1
emr   uuuuu |      18      10     187     -40     -9 |      31     37
            |      28      24     147     125      6 |       1
esa   uuuuu |     -24      -5     -71    -185      5 |      18     24
            |      15      20     102      99      8 |       4
gfz   uuuuu |       4      -2      48      44      0 |       1     16
            |       7       5      51      54      5 |       1
grg   xxxxx |      26      -5      -1     136    -19 |       4     38
            |      35      56     177      85     33 |       4
igr   xxxxx |       0      24     -19      39      0 |       5     17
            |      17      21      65      44      7 |       3
irf   xxxxx |       0       5     -27     -24     -1 |       1     17
            |      13      10      35      42      6 |       3
jpl   uuuuu |     -11     -13      57     114     -6 |       1     19
            |       6      19     123      73     15 |       2
mit   uuuuu |     -31       9    -140    -149     -2 |       8     23
            |      29      21      92      84     11 |       5
ngs   uuuuu |      69       8      20     117     10 |       6     17
            |      36      36      78      76      8 |       1
sio   uuuuu |     -68      41     -14      62     -3 |      17     25
            |      27      32      62      51      7 |       2


Table 7.1491.0   GPS week: 1491   Day: 0   MJD: 54681.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -1     -27     -29      83     -3 |      -2     14
emr   uuuuu |      16       1     151      41      1 |      30     35
esa   uuuuu |     -28      -3     -41    -239     14 |      11     18
gfz   uuuuu |       3      -9     -14      60     -4 |       0     16
grg   xxxxx |       3     -55      43      26    -52 |       4     44
igr   xxxxx |      12       5      29      39      6 |       1     17
irf   xxxxx |      10       8      -9      38     10 |      -4     18
jpl   uuuuu |     -10     -24     -75      37    -14 |       4     17
mit   uuuuu |     -41       4     -10     -18     17 |       0     23
ngs   uuuuu |      99      41      83      27     -3 |       6     17
sio   uuuuu |     -29      56     -89      57      8 |      13     22

Table 7.1491.1   GPS week: 1491   Day: 1   MJD: 54682.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      23     -18      56      63     -1 |       0     15
emr   uuuuu |      46      40     -19      95     -9 |      33     38
esa   uuuuu |     -40      29      -3    -233     13 |      15     23
gfz   uuuuu |       3      -3     131      21      3 |       1     17
grg   xxxxx |      22     -46      48     179     17 |       0     45
igr   xxxxx |      11      -7     -27      69      8 |       3     19
irf   xxxxx |       2       2      12      -6      2 |      -1     19
jpl   uuuuu |      -8      11    -105      26    -23 |       4     17
mit   uuuuu |     -29     -11     -48     -65      4 |       5     25
ngs   uuuuu |      30     -50     -23     108     16 |       6     17
sio   uuuuu |     -37      56      65      55      1 |      17     26

Table 7.1491.2   GPS week: 1491   Day: 2   MJD: 54683.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -14     -34      50     102      1 |       0     15
emr   uuuuu |      52      25      12      28     -9 |      32     37
esa   uuuuu |     -29      -7      -6    -345     13 |      16     24
gfz   uuuuu |       2       2      25      12      2 |       0     17
grg   xxxxx |       0     -47     157      31     18 |       2     45
igr   xxxxx |      11      10      17      45     10 |       4     19
irf   xxxxx |     -12      15     -80     -75      2 |       0     19
jpl   uuuuu |     -21     -12      33     114    -21 |       1     19
mit   uuuuu |     -58      30    -231    -204      4 |       6     25
ngs   uuuuu |     100     -16      88     209      5 |       5     17
sio   uuuuu |     -79      61      55     131      4 |      16     25

Table 7.1491.3   GPS week: 1491   Day: 3   MJD: 54684.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      -3     -30     -30      34     -3 |       1     14
emr   uuuuu |      22      18     206      44    -16 |      32     37
esa   uuuuu |     -33     -36     -75    -144      1 |      19     24
gfz   uuuuu |      -8       4      87       3      0 |       1     16
grg   xxxxx |      93     -40     116     176      8 |      11     38
igr   xxxxx |       3      41      -2     113     -6 |       7     17
irf   xxxxx |     -18      14     -53     -16     -7 |       2     16
jpl   uuuuu |      -6      -1      67     236    -10 |       0     20
mit   uuuuu |     -52      43    -254    -173     -9 |      10     22
ngs   uuuuu |     103     -10      68      47     22 |       6     16
sio   uuuuu |     -85      63     -22       1     -7 |      19     25

Table 7.1491.4   GPS week: 1491   Day: 4   MJD: 54685.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      15      -9      42      41     -4 |      -1     14
emr   uuuuu |      20       3     315     -73    -15 |      30     36
esa   uuuuu |     -25       1    -182    -161      3 |      19     24
gfz   uuuuu |       6      -4      71      71      5 |       1     16
grg   xxxxx |      49      41    -227     178    -39 |       5     31
igr   xxxxx |     -26      43    -121     -23     -1 |       7     17
irf   xxxxx |      -8       9     -55     -75     -4 |       2     17
jpl   uuuuu |     -17     -48     168     153      4 |      -1     21
mit   uuuuu |     -51       3    -170    -263     -5 |      10     22
ngs   uuuuu |      82      13     -76     216      5 |       6     17
sio   uuuuu |     -86      62     -10      66     -6 |      18     25

Table 7.1491.5   GPS week: 1491   Day: 5   MJD: 54686.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |     -10     -29     -41      83      1 |      -1     13
emr   uuuuu |      -5      18     294    -223     -7 |      30     36
esa   uuuuu |       7     -17    -236     -32     -5 |      21     27
gfz   uuuuu |       4       1      27      -6     -8 |       1     17
grg   xxxxx |      -7      21     131     107    -31 |       3     31
igr   xxxxx |      10      42      59      18     -8 |       7     17
irf   xxxxx |      13      -6     -11     -37     -7 |       3     18
jpl   uuuuu |      -4      -2     243     140     10 |       0     22
mit   uuuuu |      21       8    -174    -183     -9 |      12     24
ngs   uuuuu |      20      25      82     147     14 |       6     17
sio   uuuuu |    -100      -1      -5       2    -10 |      19     26

Table 7.1491.6   GPS week: 1491   Day: 6   MJD: 54687.500

                                                         AC LOD  AC LOD
CENT  FLAG  |   Xpole   Ypole     Xrt     Yrt    LOD |    BIAS  BIAS RMS
            |   [uas]   [uas]   [uas/d] [uas/d]  [us]|    [us]    [us]
------------+----------------------------------------+------------------
cod   uuuuu |      16     -10     -68      76     -3 |       1     11
emr   uuuuu |     -28     -37     351    -189    -11 |      32     37
esa   uuuuu |     -23       0      43    -141      0 |      23     27
gfz   uuuuu |      15      -6       7     147      3 |       2     15
grg   xxxxx |      25      87    -277     257    -56 |       2     32
igr   xxxxx |     -24      35     -90      11     -6 |       9     16
irf   xxxxx |      14     -10       4       6     -7 |       5     15
jpl   uuuuu |     -12     -17      68      89     13 |       1     21
mit   uuuuu |      -8     -14     -97    -135    -15 |      14     22
ngs   uuuuu |      46      54     -85      64      8 |       9     18
sio   uuuuu |     -63      -9     -91     120     -9 |      21     26



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