[IGSREPORT-14004] Wk 1380 IGS SINEX Combination

Martin Bourassa mbourass at nrcan.gc.ca
Thu Jul 6 20:39:06 PDT 2006


******************************************************************************
IGS Electronic Report   06 Jul 20:39:09 PDT 2006      Message Number 14004
******************************************************************************

Author:  R. Ferland , M. Bourassa

===================================================================
 Combined AC  solution for GPS week 1380 -  06/06/18 to 06/06/24
===================================================================

1) Contacts:
============
e-mail: RFerland at NRCan.gc.ca
Tel:    (613)995-4002 (Remi Ferland)
Fax:    (613)995-3215

2) Products:
============
All products are available at
  CDDIS (cddis.gsfc.nasa.gov) and SOPAC (garner.ucsd.edu)

igs06P1380.snx  Combined weekly solution. 
igs06P1380.erp  Daily Earth Rotation Parameters.
igs00p02.erp    Daily Earth Rotation Parameters since GPS week 1013.
IGS06P25.snx    Cumulative Combined solution. 
igs06P1380.sum  This file.
igs06P1380.itr  Residuals between the AC and the IGb00 for the RF stations. 
igs06P1380.res  Residuals between the AC and the Combined Weekly solution.
IGS06P25.res    Residuals between the AC and the Cumulative Combined solution.
 
Where IGSyyPww & igsyyPwwww represent:
      yy      Last 2 digits of the year
      ww      week in year yy
      wwww    GPS week
      P       GPS technique used
 

3) Combination Strategy:
========================

       The AC solutions are processed using the following procedure:

3-1) The AC solutions are checked/corrected for possible format problems,
     station names inconsistencies, etc...
3-2) The AC solutions are unconstrained according to the information provided
     in the SOLUTION/APRIORI Block.
3-3) The AC solutions are aligned (using a 7-parameters) and compared to the
     IGb00 stations at the current epoch.
     ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS03P33_RS99.SNX.Z
3-4) The AC are compared to IGb00, to each other, to the previous week
     solution and to the cumulative solution in order to identify and remove
     outliers.
3-5) The weekly AC solutions are combined and added to the cumulative
     combined solution. The cumulative combination is done to ensures 14
     parameters singularity.

     The weekly combined solution is aligned to the IGb00 of the current
     epoch using a 7-parameters transformation. The singular cumulative
     combined solution is aligned to the IGb00 of the reference epoch
     using a 14-parameters transformation and the 99 ITRF station positions
     and velocities. The IGb00 is a realization of ITRF2000.

     For more details, see:
     Blewitt, G., C. Boucher and J. Kouba, 1997, Procedure for ITRF continuous
       realization, the report of the IGS GB, presented to the IGS Governing 
       Board Meeting held in San Francisco, Dec. 11.
     Kouba, J., J. Ray and M.M. Watkins, IGS Reference Frame Realization, 1998
       IGS Analysis Center Workshop Proceedings, European Space Operations
       Centre, Darmstadt, Germany.

The combination software was developed at NRCan.

4) Remarks:
===========

     ITR = IGS03P33_RS99.SNX
     igs = igs06P1380.snx
     IGS = IGS06P25.snx

     MIT = mit13807.snx
     mit = mit1380g.snx

     BuA = IERS Bulletin A

     mit ncl are used to quality control the weekly combination.
     gfz ngs excluded from the geocenter estimation (Sec. 5-4).

     Solutions with manual station deletion:
         After unconstraining:
             esa  KOKB  NTUS
             jpl  ASPA
             ngs  MALI

     4-1) Starting with GPS week 1143, the solutions are aligned to the
     IGS03P33_RS99.SNX realization of ITRF2000.

     4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A
     is included in the erp files.

5) Results:
===========

5-1)      AC (Variance Factor)^0.5 estimates:
==================================================
           The residuals used in the estimation of the Variance Factor
           are the differences between the cumulative combined solution
           and each AC weekly solution.
           SF = (Variance Factor)^0.5 = (Chi^2/dof)^0.5
           Final(SF) = Apriori(SF) * Aposteriori(SF)

Solution       |# sta| #RF |    Apriori(SF)|Aposteriori(SF)|      Final(SF)|
---------------|-----|-----|---------------|---------------|---------------|
cod            | 169 |  68 |        23.483 |         1.000 |        23.492 |
emr            |  43 |  31 |         5.119 |         1.000 |         5.120 |
esa            |  67 |  49 |        37.174 |         0.996 |        37.014 |
gfz            | 178 |  74 |         5.098 |         1.000 |         5.100 |
jpl            | 125 |  48 |         5.862 |         1.000 |         5.864 |
MIT            | 149 |  62 |         2.373 |         1.002 |         2.379 |
ngs            | 158 |  74 |        34.504 |         1.000 |        34.510 |
sio            | 158 |  66 |         2.110 |         0.997 |         2.105 |
mit            | 261 |  69 |         1.121 |         1.024 |         1.148 |
ncl            | 166 |  74 |         2.217 |         0.998 |         2.212 |
igs            | 251 |  77 |         1.496 |         1.012 |         1.514 |
---------------|-----|-----|---------------|---------------|---------------|

5-2)      Solution Residuals weighted Average & STD :
=====================================================

5-2-1)    With respect to the IGb00 stations:
=============================================

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod         68 |     0.7      0.2     -1.2 |     4.0      4.3     15.0 |
emr         31 |    -0.9      0.2     -0.0 |     3.7      3.9     13.7 |
esa         49 |     0.6      0.2      0.3 |     4.4      4.2     10.8 |
gfz         74 |     1.4      0.2     -0.2 |     4.0      4.3     13.8 |
jpl         48 |     0.6      0.3     -0.6 |     4.0      4.3     15.9 |
MIT         62 |    -0.0      0.4      0.7 |     3.8      3.6     12.9 |
ngs         74 |    -0.7      0.1      0.3 |     4.0      4.5     14.0 |
sio         66 |     0.8      0.2      0.9 |     3.7      4.5     13.0 |
mit         69 |     0.8      0.1      0.2 |     3.1      3.6     11.9 |
ncl         74 |     1.1      0.2      0.3 |     3.5      3.8     11.5 |
---------------|---------------------------|---------------------------|

5-2-2)    With respect to the Weekly Combination:
=================================================

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        167 |    -0.4     -0.1     -1.9 |     1.8      1.5      4.8 |
emr         43 |    -1.4     -0.2      1.4 |     1.5      1.8      6.9 |
esa         66 |    -1.4      0.0     -1.2 |     7.0      6.8     12.4 |
gfz        176 |     1.0     -0.4     -0.6 |     1.1      1.1      4.6 |
jpl        123 |    -1.2      0.2     -0.6 |     1.4      2.1      9.0 |
MIT        137 |    -0.9     -0.0     -1.1 |     1.8      2.0      4.3 |
ngs        156 |    -1.5     -1.1      1.1 |     2.1      2.8      7.5 |
sio        152 |    -0.2      0.1     -1.8 |     1.9      2.2      4.1 |
mit        236 |     0.2     -0.0     -1.0 |     1.2      1.1      4.8 |
ncl        165 |     0.5     -0.3     -0.1 |     0.8      0.7      2.2 |
ITR         76 |    -0.8     -0.4     -1.1 |     3.6      4.2     12.6 |
---------------|---------------------------|---------------------------|

5-2-3)    With respect to the Cumulative Combination:
=====================================================

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        158 |     0.4      0.1     -1.8 |     2.8      2.8      8.6 |
emr         42 |    -1.2      0.0      2.6 |     2.0      2.3      9.1 |
esa         65 |    -0.9      0.1     -1.2 |     7.0      6.4     11.3 |
gfz        163 |     1.8      0.1     -0.7 |     2.6      2.4      8.0 |
jpl        115 |     0.1      0.3     -0.0 |     2.8      3.2     11.0 |
MIT        132 |    -0.2      0.1     -0.2 |     2.3      2.2      7.1 |
ngs        146 |    -0.5     -0.6      1.5 |     2.9      3.1     10.2 |
sio        143 |     0.7      0.4     -0.7 |     2.7      2.9      7.8 |
mit        206 |     0.9      0.3     -0.6 |     2.3      2.0      7.4 |
ncl        155 |     1.3     -0.0      0.4 |     2.2      2.2      6.3 |
igs        220 |     0.8      0.3      0.3 |     2.2      2.3      6.3 |
ITR         85 |    -0.5     -0.0     -1.1 |     2.3      2.5      7.3 |
---------------|---------------------------|---------------------------|

5-3)      7-Parameters Transformation: AC ----> IGS03P33_RS99.snx
=================================================================

5-3-1)    Estimates : 
=====================

Solution       |    R X      R Y      R Z      T X      T Y      T Z      SCL  |
               |   (mas)    (mas)    (mas)     (mm)     (mm)     (mm)    (ppb) |
---------------|---------------------------------------------------------------|
cod            |   0.009    0.008    0.006      8.4      0.3     -9.1     3.49 |
emr            |  -0.000   -0.004   -0.023     -8.9      5.1    -11.7     4.30 |
esa            |   0.000   -0.006    0.001      1.5      0.2    -16.6     2.23 |
gfz            |   0.047   -0.020   -0.019     -1.8      1.9     -6.0     2.72 |
jpl            |   0.158   -0.012    0.068      1.9      2.3     -8.9     1.67 |
MIT            |  -0.009   -0.008   -0.013     -3.9      1.1    -30.3     3.81 |
ngs            |  -0.033   -0.049   -0.005     -5.1     -2.7    -28.9     3.66 |
sio            |   0.041   -0.019   -0.046     -0.5     -4.9    -36.6     3.78 |
mit            |  -0.010    0.024   -0.031     -2.4     -1.1     -2.6     3.43 |
ncl            |   0.112   -0.011    0.017     -1.5      1.0     -7.4     3.03 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     3.21 |
---------------|---------------------------------------------------------------|

5-3-2)    STD : 
===============

Solution       |    R X      R Y      R Z      T X      T Y      T Z      SCL  |
               |   (mas)    (mas)    (mas)     (mm)     (mm)     (mm)    (ppb) |
---------------|---------------------------------------------------------------|
cod            |   0.049    0.049    0.055      1.3      1.3      1.3     0.20 |
emr            |   0.071    0.069    0.082      1.8      1.8      1.8     0.29 |
esa            |   0.054    0.056    0.064      1.4      1.4      1.4     0.23 |
gfz            |   0.047    0.047    0.054      1.2      1.2      1.2     0.19 |
jpl            |   0.055    0.056    0.065      1.5      1.5      1.4     0.23 |
MIT            |   0.049    0.050    0.057      1.3      1.3      1.3     0.20 |
ngs            |   0.046    0.047    0.054      1.2      1.2      1.2     0.19 |
sio            |   0.048    0.049    0.055      1.3      1.3      1.3     0.20 |
mit            |   0.047    0.049    0.055      1.3      1.3      1.2     0.19 |
ncl            |   0.047    0.047    0.053      1.2      1.2      1.2     0.19 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.91 |
---------------|---------------------------------------------------------------|

5-4)      Geocenter:
====================

               |      X        Y        Z  |    s X      s Y      s Z  |
               |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
---------------|---------------------------|---------------------------|
igs            |     0.3     -0.7    -12.8 |     3.2      3.4      5.0 |
---------------|---------------------------|---------------------------|

5-5)      ERP Residuals Weighted Average & STD :
================================================

5-5-1)    Weighted Average :
============================

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---       -2.2      -0.8       ---      -6.3       --- |
emr            |     ---      -12.5       4.1       5.8      -3.0      28.4 |
esa            |     ---       22.3       7.8       ---      -3.0       --- |
gfz            |     ---        1.3       1.6      -1.3       4.3      10.5 |
jpl            |     ---      -27.4       1.3      -1.7      -2.9       5.0 |
MIT            |     ---       14.2       2.4       0.9      -0.3      -0.2 |
ngs            |     ---        4.9       2.2      -7.7      10.2       7.6 |
sio            |     ---       27.4       4.2       0.2       3.6      -1.4 |
mit            |     ---       27.6       1.8       1.6       2.8      -0.2 |
ncl            |     ---        9.6       2.7       ---       2.8       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---        6.5      -2.9       0.1      27.7       0.4 |
---------------|------------------------------------------------------------|

5-5-2)    STD :
===============

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---        4.2       0.6       ---       1.4       --- |
emr            |     ---        5.2       1.4      13.7       2.9       9.5 |
esa            |     ---       18.7       3.5       ---       4.2       --- |
gfz            |     ---        4.5       1.8      10.4       1.3       4.0 |
jpl            |     ---        5.5       2.4       6.7       2.7       5.5 |
MIT            |     ---        3.7       3.1       5.8       2.1       9.4 |
ngs            |     ---       15.6       4.6      17.5       3.8      15.4 |
sio            |     ---        6.6       1.6       5.7       2.1       2.6 |
mit            |     ---        9.5       4.4       4.7       1.8       8.1 |
ncl            |     ---        1.5       0.9       ---       1.4       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       24.6       5.7      10.8       4.5       9.4 |
---------------|------------------------------------------------------------|

5-6)      Outliers:
===================

Thresholds set at 5 sigmas and 50 mm.

 Solution             Solution           |  Station   |    N       E       U  |
              Minus                      |code id soln|   (mm)    (mm)    (mm)|
-----------------------------------------|------------|-----------------------|
                                         |            |                       |
IGS03P33_RS99.snx    cod13807.snx        |THU3  A ----|    5.4     6.5   -32.5|
                                         |            |                       |
IGS03P33_RS99.snx    gfz13807.snx        |HRAO  A ----|   12.8    -2.4    -3.4|
                                         |            |                       |
IGS03P33_RS99.snx    MIT13807.snx        |GRAZ  A ----|   -1.5    -7.8  1903.5|
                                         |            |                       |
IGS03P33_RS99.snx    sio13807.snx        |DRAO  A ----|    5.6     4.2    25.7|
                                         |            |                       |
IGS03P33_RS99.snx    sio13807.snx        |THU3  A ----|    7.4     0.1   -32.5|
                                         |            |                       |
IGS03P33_RS99.snx    mit1380g.snx        |GRAZ  A ----|   -4.6    -8.7   401.7|
                                         |            |                       |
IGS03P33_RS99.snx    mit1380g.snx        |DRAO  A ----|    4.9     4.8    24.4|
IGS03P33_RS99.snx    mit1380g.snx        |HRAO  A ----|   10.9    -1.5     3.6|
IGS03P33_RS99.snx    mit1380g.snx        |JOZE  A ----|   -3.3     7.9   -73.7|
IGS03P33_RS99.snx    mit1380g.snx        |THU3  A ----|    4.6     4.8   -28.5|
                                         |            |                       |
IGS03P33_RS99.snx    ncl1380g.snx        |DRAO  A ----|    4.5     4.6    22.7|
IGS03P33_RS99.snx    ncl1380g.snx        |HRAO  A ----|   10.8    -2.2     1.2|
                                         |            |                       |
cod13807.snx         mit1380g.snx        |HFLK  A ----|    4.8    -4.4    50.3|
                                         |            |                       |
MIT13807.snx         mit1380g.snx        |WROC  A ----|   -2.8     8.7  -139.6|
                                         |            |                       |
sio13807.snx         mit1380g.snx        |HERS  A ----|   -1.0    -1.9   -60.7|
                                         |            |                       |
IGS06P24.snx         gfz13807.snx        |JAMA  A ----|   19.6   -14.1     3.9|
                                         |            |                       |
IGS06P24.snx         MIT13807.snx        |SUNM  A ----|    0.8    -4.5    65.3|
                                         |            |                       |
IGS06P24.snx         mit1380g.snx        |JAMA  A ----|   18.2   -14.3     3.1|
IGS06P24.snx         mit1380g.snx        |NTUS  A    2|    3.2   -24.8    -1.7|
IGS06P24.snx         mit1380g.snx        |SUNM  A ----|   -0.6    -4.9    54.3|
                                         |            |                       |
IGS06P24.snx         ncl1380g.snx        |JAMA  A ----|   18.2   -13.8     6.5|
                                         |            |                       |
IGS06P24.snx         igs06P1380.snx      |JAMA  A ----|   17.9   -13.4     8.9|
IGS06P24.snx         igs06P1380.snx      |KOUR  A ----|    7.7     5.4    18.4|
-----------------------------------------|------------|-----------------------|

5-7)      Conflicts:
====================

IERS DOMES NO    MIT    cod    emr    esa    gfz    jpl    ngs    sio    IGS    igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
    43001M002        THU2 A THU3 A THU3 A THU3 A THU3 A THU3 A THU2 A THU3 A THU3 A
                     THU3 A
    42202M005 AREQ A AREQ A        AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A
    40451M123 GODE A GODZ A        GODE A GODE A        GODE A GODE A GODE A GODE A
    50103M108 TIDB A        TIDB A TIDB A TIDB A TID2 A TIDB A TID2 A TIDB A TIDB A
                                          TID1 A               TIDB A
                                          TID2 A 
    50134M001 DARW A DARR A DARW A DARW A DARW A DARR A DARW A DARW A DARW A DARW A
    22003M001 PIMO A PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A
    12313M002        IRKJ A                                    MDVJ A IRKJ A IRKJ A
    22306M002 IISC A IISC A        IISC B IISC A IISC A IISC B IISC A IISC A IISC A
    30314M002 SUTH A SUTH A        SUTH B SUTH A        SUTH A SUTH A SUTH A SUTH A
    43005M002        KELY B        KELY B KELY B KELY B KELY B KELY B KELY A KELY A
    10422M001        KIR0 A                      KIR0 A               KR0G A KR0G A
    20703S001        RAMO A               RAMO A RAMO A RAMO A        ELRO A RAMO A
                                                                      RAMO A 
    21612M001        URUM A               URUM A        URUM A URUM A URUM A URUM A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  HLFX A  PALM A  PUR3 A  DNRC A  MIA3 A  KYW1 A  MCD1 A  LASC A  UPO1 A  OUSD A
  MTJO A  CNCL A  QUAR A  KARA A  SAMP A  IENG A
 
MISSING IERS DOMES NOS AT gfz:
-----------------------------
  PALM A
 
MISSING IERS DOMES NOS AT ngs:
-----------------------------
  MCN1 A
 
MISSING IERS DOMES NOS AT sio:
-----------------------------
  KULU A  OUSD A  CNCL A  KARA A
IERS DOMES NO    mit    ncl    IGS    igs
============= ====== ====== ====== ======
    43005M002 KELY B KELY B KELY A KELY A
    43001M002 THU2 A THU3 A THU3 A THU3 A
    40451M123 GODZ A GODE A GODE A GODE A
              GODE A 
    50103M108 TIDB A TID2 A TIDB A TIDB A
                     TIDB A
    50134M002 DARR A 
    50134M001 DARW A DARR A DARW A DARW A
                     DARW A
    20703S001 RAMO A RAMO A ELRO A RAMO A
                            RAMO A 
    12335M001 MIKL A               MIKL A



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