[IGSREPORT-14074] Wk 1383 IGS SINEX Combination

Martin Bourassa mbourass at nrcan.gc.ca
Thu Jul 27 21:05:51 PDT 2006


******************************************************************************
IGS Electronic Report   27 Jul 21:05:55 PDT 2006      Message Number 14074
******************************************************************************

Author:  R. Ferland , M. Bourassa

===================================================================
 Combined AC  solution for GPS week 1383 -  06/07/09 to 06/07/15
===================================================================

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)

igs06P1383.snx  Combined weekly solution. 
igs06P1383.erp  Daily Earth Rotation Parameters.
igs00p02.erp    Daily Earth Rotation Parameters since GPS week 1013.
IGS06P28.snx    Cumulative Combined solution. 
igs06P1383.sum  This file.
igs06P1383.itr  Residuals between the AC and the IGb00 for the RF stations. 
igs06P1383.res  Residuals between the AC and the Combined Weekly solution.
IGS06P28.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 = igs06P1383.snx
     IGS = IGS06P28.snx

     MIT = mit13837.snx
     mit = mit1383g.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  NTUS
             ngs  AREQ

     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            | 170 |  70 |        21.389 |         1.000 |        21.397 |
emr            |  43 |  31 |         5.700 |         1.000 |         5.701 |
esa            |  69 |  51 |        40.900 |         1.002 |        40.977 |
gfz            | 183 |  74 |         5.656 |         1.000 |         5.658 |
jpl            | 116 |  46 |         6.340 |         1.000 |         6.341 |
MIT            | 150 |  63 |         2.560 |         1.000 |         2.561 |
ngs            | 153 |  76 |        27.114 |         1.000 |        27.115 |
sio            | 176 |  74 |         2.112 |         1.000 |         2.113 |
mit            | 272 |  74 |         1.071 |         1.000 |         1.071 |
ncl            | 167 |  75 |         2.248 |         1.008 |         2.265 |
igs            | 251 |  78 |         1.438 |         1.003 |         1.442 |
---------------|-----|-----|---------------|---------------|---------------|

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         70 |     0.9      0.3     -1.2 |     4.0      4.3     14.6 |
emr         31 |     0.6      0.3      1.4 |     4.4      3.7     15.1 |
esa         51 |     0.6      0.1     -0.3 |     3.8      3.6     12.6 |
gfz         74 |     0.5      0.2     -0.1 |     4.0      4.2     12.8 |
jpl         46 |     1.3      0.5      1.2 |     4.1      3.8     15.1 |
MIT         63 |    -0.1      0.4      0.3 |     4.2      3.8     12.3 |
ngs         76 |     0.6      0.5     -0.2 |     4.2      5.1     14.0 |
sio         74 |     1.3      0.0      0.7 |     4.1      4.5     13.4 |
mit         74 |     1.1      0.2      0.2 |     3.3      3.7     12.1 |
ncl         75 |     0.6      0.1      0.5 |     3.6      3.8     11.2 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        166 |    -0.2      0.3     -1.2 |     1.5      1.3      4.9 |
emr         43 |    -0.0      0.3      1.9 |     2.0      1.8      7.2 |
esa         69 |    -1.1      0.8     -1.3 |     8.5      7.4     12.0 |
gfz        179 |    -0.2     -0.1     -0.9 |     0.8      1.0      4.5 |
jpl        113 |     0.1      0.5      1.9 |     1.8      3.3      9.7 |
MIT        135 |    -0.9      0.4     -0.6 |     1.5      1.9      4.0 |
ngs        150 |    -0.5     -0.9      0.8 |     3.2      4.0      7.8 |
sio        169 |     0.5      0.2     -0.6 |     1.3      2.2      3.9 |
mit        243 |     0.2      0.1      0.2 |     1.4      0.9      2.8 |
ncl        163 |    -0.0     -0.0     -0.2 |     0.6      0.5      2.1 |
ITR         77 |    -1.0     -0.3     -1.6 |     3.6      3.9     11.9 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        159 |     0.7      0.1     -1.0 |     2.6      2.4      8.3 |
emr         42 |     0.5      0.1      2.1 |     2.9      2.6      9.0 |
esa         67 |    -0.3      0.9     -0.8 |     8.3      7.2     11.4 |
gfz        167 |     0.8     -0.1     -0.9 |     2.4      2.2      7.7 |
jpl        105 |     1.3      0.2      1.9 |     2.9      3.6     11.2 |
MIT        132 |     0.0      0.2     -0.2 |     2.6      2.3      6.1 |
ngs        142 |     0.6     -0.9      0.7 |     3.4      4.4      9.9 |
sio        158 |     1.3      0.3     -0.5 |     2.4      3.0      6.9 |
mit        211 |     1.1      0.1      0.2 |     2.4      2.2      6.2 |
ncl        154 |     1.0     -0.1      0.2 |     2.3      2.1      5.8 |
igs        217 |     0.8      0.0      0.0 |     1.9      1.9      5.8 |
ITR         85 |    -0.6     -0.0     -1.2 |     2.4      2.6      7.5 |
---------------|---------------------------|---------------------------|

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            |   0.003    0.003    0.010      9.1      0.0      2.8     3.27 |
emr            |  -0.011    0.015   -0.028    -13.2     -3.1    -12.4     4.09 |
esa            |  -0.004   -0.001   -0.002     -1.4      5.9    -15.6     2.26 |
gfz            |   0.059   -0.029   -0.007     -1.5      2.1     -4.8     2.57 |
jpl            |   0.163   -0.033    0.084     -7.1      3.5    -17.9     1.17 |
MIT            |  -0.011   -0.013   -0.008     -4.7      8.7    -13.3     3.84 |
ngs            |  -0.037   -0.077    0.022      4.3     -4.3     -9.6     2.46 |
sio            |   0.006   -0.018   -0.019     -3.6     -1.7     -8.3     3.81 |
mit            |  -0.016    0.019   -0.017     -2.4     -0.7     -2.8     2.97 |
ncl            |   0.113   -0.007    0.014     -1.5      1.4     -6.1     2.92 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     2.94 |
---------------|---------------------------------------------------------------|

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            |   0.048    0.049    0.053      1.3      1.3      1.2     0.19 |
emr            |   0.072    0.068    0.085      1.9      1.9      1.8     0.29 |
esa            |   0.053    0.055    0.063      1.4      1.4      1.4     0.22 |
gfz            |   0.047    0.046    0.053      1.2      1.2      1.2     0.19 |
jpl            |   0.057    0.057    0.066      1.5      1.5      1.5     0.23 |
MIT            |   0.050    0.049    0.057      1.3      1.3      1.3     0.20 |
ngs            |   0.046    0.046    0.052      1.2      1.2      1.2     0.19 |
sio            |   0.047    0.047    0.054      1.2      1.2      1.2     0.19 |
mit            |   0.046    0.047    0.054      1.2      1.2      1.2     0.19 |
ncl            |   0.046    0.046    0.053      1.2      1.2      1.2     0.19 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     1.00 |
---------------|---------------------------------------------------------------|

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

               |      X        Y        Z  |    s X      s Y      s Z  |
               |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
---------------|---------------------------|---------------------------|
igs            |    -0.4      1.9     -5.1 |     3.2      3.2      4.8 |
---------------|---------------------------|---------------------------|

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            |     ---       -6.2      -1.0       ---      -5.8       --- |
emr            |     ---       -7.7      -0.4     -12.0      -5.1      29.4 |
esa            |     ---      -23.6       1.8       ---      -7.7       --- |
gfz            |     ---       -1.0       3.2      -0.5       0.3      11.5 |
jpl            |     ---      -43.7       1.0      -9.7      -5.8      18.0 |
MIT            |     ---       16.5       0.2       0.4       4.1       0.3 |
ngs            |     ---      -14.2      12.1      26.6      12.6      19.7 |
sio            |     ---       64.5      -5.8       0.3       0.4      -0.5 |
mit            |     ---       35.3      -1.1       0.7       5.1      -0.1 |
ncl            |     ---        8.6       0.7       ---       1.9       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       -5.5       0.8      -0.7      31.6       1.1 |
---------------|------------------------------------------------------------|

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

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---        5.2       2.2       ---       1.3       --- |
emr            |     ---        5.2       2.1       8.1       1.9      17.6 |
esa            |     ---       29.9       2.7       ---       4.5       --- |
gfz            |     ---        5.8       1.7       6.8       0.8       7.2 |
jpl            |     ---       11.4       2.1      16.4       1.1      10.6 |
MIT            |     ---        6.6       1.9       4.1       2.7       8.4 |
ngs            |     ---       24.2       9.7      22.5       5.4      17.7 |
sio            |     ---        7.0       3.2       9.5       2.2       8.9 |
mit            |     ---       18.9       1.7       9.5       2.3       4.4 |
ncl            |     ---        1.1       0.7       ---       1.0       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       22.1       7.0      13.8       4.9       7.2 |
---------------|------------------------------------------------------------|

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    cod13837.snx        |THU3  A ----|    5.2     5.0   -36.3|
                                         |            |                       |
IGS03P33_RS99.snx    gfz13837.snx        |THU3  A ----|    2.9     3.8   -41.1|
                                         |            |                       |
IGS03P33_RS99.snx    ncl1383g.snx        |HRAO  A ----|   10.9    -1.4     0.8|
IGS03P33_RS99.snx    ncl1383g.snx        |THU3  A ----|    3.9     3.7   -35.2|
                                         |            |                       |
esa13837.snx         jpl13837.snx        |AMC2  A ----|    0.9     4.8    56.3|
                                         |            |                       |
sio13837.snx         mit1383g.snx        |ANKR  A ----|  307.1   396.9   -78.5|
                                         |            |                       |
igs06P1382.snx       mit1383g.snx        |NTUS  A    2|    5.2   -16.8    -2.6|
                                         |            |                       |
IGS06P27.snx         cod13837.snx        |JAMA  A ----|   13.7    -9.4    10.3|
                                         |            |                       |
IGS06P27.snx         gfz13837.snx        |JAMA  A ----|   16.9   -12.3     3.8|
                                         |            |                       |
IGS06P27.snx         jpl13837.snx        |JAMA  A ----|   17.1   -12.4    11.1|
                                         |            |                       |
IGS06P27.snx         MIT13837.snx        |JAMA  A ----|   16.2   -14.2     9.6|
                                         |            |                       |
IGS06P27.snx         sio13837.snx        |JAMA  A ----|   17.1   -13.9     8.9|
                                         |            |                       |
IGS06P27.snx         mit1383g.snx        |JAMA  A ----|   15.9   -11.8     5.9|
                                         |            |                       |
IGS06P27.snx         ncl1383g.snx        |JAMA  A ----|   16.0   -12.1     7.2|
                                         |            |                       |
IGS06P27.snx         igs06P1383.snx      |DWH1  A ----|   13.1    -1.9     4.0|
IGS06P27.snx         igs06P1383.snx      |MSKU  A ----|    9.6    -6.3     0.9|
IGS06P27.snx         igs06P1383.snx      |NTUS  A    2|    0.6   -10.1     5.0|
-----------------------------------------|------------|-----------------------|

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 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        TIDB A TID2 A TIDB A TIDB A
                                          TID1 A               TIDB A
                                          TID2 A 
    50134M002 DARR A 
    50134M001 DARW A DARR A DARW A DARW A DARW A DARR A DARW 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
    50107M007 YAR2 A 
    50107M004        YAR2 A               YAR2 A        YAR1 A YAR2 A YAR1 A YAR1 A
    12313M002        IRKJ A                                    MDVJ A IRKJ A IRKJ A
    22306M002 IISC A 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 
    14001M006        ZIMJ A                      ZIMJ A               ZIMJ A ZIMJ A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  HLFX A  PALM A  PUR3 A  DNRC A  MIA3 A  CCV3 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  SG21 A  OUSD A  CNCL A  KARA A  BRAS A
IERS DOMES NO    mit    ncl    IGS    igs
============= ====== ====== ====== ======
    13407S014 MAD2 A 
    13407S012 MADR A MAD2 A MADR A MADR A
                     MADR A
    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



More information about the IGSREPORT mailing list