Subject: [IGSREPORT-13227] Wk 1349 IGS SINEX Combination
From: "Martin Bourassa" <[email-masked]>
To: [email-masked]
Cc: [email-masked], [email-masked]
Date: Thu, 1 Dec 2005 23:22:41 -0500 (EST)

******************************************************************************
IGS Electronic Report   01 Dec 20:22:47 PST 2005      Message Number 13227
******************************************************************************

Author:  R. Ferland , M. Bourassa

===================================================================
 Combined AC  solution for GPS week 1349 -  05/11/13 to 05/11/19
===================================================================

1) Contacts:
============
e-mail: [email-masked]
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)

igs05P1349.snx  Combined weekly solution. 
igs05P1349.erp  Daily Earth Rotation Parameters.
igs00p02.erp    Daily Earth Rotation Parameters since GPS week 1013.
IGS05P46.snx    Cumulative Combined solution. 
igs05P1349.sum  This file.
igs05P1349.itr  Residuals between the AC and the IGb00 for the RF stations. 
igs05P1349.res  Residuals between the AC and the Combined Weekly solution.
IGS05P46.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 = igs05P1349.snx
     IGS = IGS05P46.snx

     MIT = mit13497.snx
     mit = mit1349g.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:
             cod  MANZ
             jpl  ASPA
             mit  MANZ

     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 |        24.567 |         1.002 |        24.609 |
emr            |  42 |  30 |         5.168 |         1.001 |         5.174 |
esa            |  71 |  55 |        15.614 |         1.001 |        15.626 |
gfz            | 183 |  74 |         5.473 |         1.001 |         5.480 |
jpl            | 117 |  45 |         6.140 |         1.001 |         6.147 |
MIT            | 142 |  64 |         2.469 |         1.003 |         2.477 |
ngs            | 145 |  75 |        40.855 |         0.998 |        40.774 |
sio            | 171 |  75 |         2.673 |         1.001 |         2.676 |
mit            | 271 |  75 |         1.036 |         1.002 |         1.038 |
ncl            | 166 |  79 |         1.835 |         1.001 |         1.836 |
igs            | 256 |  80 |         1.521 |         1.018 |         1.548 |
---------------|-----|-----|---------------|---------------|---------------|

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 |     0.8      0.0     -0.7 |     3.4      3.2     12.1 |
emr         30 |    -0.2     -0.3      0.5 |     3.7      2.9     11.6 |
esa         55 |    -1.7      0.4      0.2 |     4.1      3.3     10.1 |
gfz         74 |    -0.7     -0.1     -0.2 |     3.6      3.2     10.7 |
jpl         45 |    -0.2     -0.0     -0.2 |     3.3      3.6     12.8 |
MIT         64 |     0.5      0.2      0.5 |     3.6      3.3     10.9 |
ngs         75 |    -1.3      0.4      0.3 |     4.2      4.2     13.3 |
sio         75 |    -0.5      0.0      1.0 |     3.8      3.3     11.5 |
mit         75 |     0.4      0.1      0.1 |     3.2      2.9     11.3 |
ncl         79 |     0.4      0.0      0.1 |     3.4      2.8     10.2 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        168 |     0.4      0.1     -0.8 |     1.3      1.7      4.5 |
emr         42 |    -0.6     -0.1     -1.3 |     1.9      1.8      6.1 |
esa         70 |    -1.8      0.2      0.2 |     2.8      2.3     10.8 |
gfz        179 |    -0.5     -0.4     -1.7 |     1.1      1.4      3.9 |
jpl        116 |    -0.4      0.1      2.1 |     2.3      2.5      8.9 |
MIT        135 |     0.5      0.2     -0.1 |     1.2      1.6      4.4 |
ngs        143 |    -0.8      0.4      1.5 |     1.9      3.3      7.6 |
sio        161 |    -0.5     -0.1      0.1 |     1.6      1.9      6.7 |
mit        247 |     0.9      0.1     -0.2 |     0.8      0.7      2.6 |
ncl        163 |     0.5     -0.2      0.8 |     0.8      0.6      3.7 |
ITR         79 |     0.1      0.0     -1.7 |     3.2      2.8     10.1 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        161 |     0.1      0.0     -0.9 |     2.3      2.6      7.9 |
emr         41 |    -1.0     -0.3     -0.5 |     2.8      2.3      8.1 |
esa         68 |    -2.5     -0.0     -0.0 |     3.2      2.8     11.7 |
gfz        171 |    -0.9     -0.4     -1.3 |     2.2      2.4      7.6 |
jpl        106 |    -0.9      0.0      1.6 |     3.3      3.5     10.5 |
MIT        130 |    -0.1      0.2     -0.0 |     2.1      2.1      7.0 |
ngs        140 |    -1.3      0.6      2.0 |     2.9      4.3      9.0 |
sio        154 |    -1.0      0.0      0.1 |     2.6      2.5      8.8 |
mit        222 |     0.3      0.1     -0.3 |     1.9      1.9      6.2 |
ncl        158 |     0.1     -0.3      1.2 |     2.1      2.1      6.9 |
igs        231 |    -0.5     -0.1      0.0 |     1.9      1.8      6.0 |
ITR         86 |    -0.5     -0.0     -1.0 |     1.9      2.0      5.9 |
---------------|---------------------------|---------------------------|

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            |   0.010    0.001    0.006      3.0     12.2    -15.7     3.18 |
emr            |   0.007    0.005    0.016    -10.4     -4.9    -27.7     4.64 |
esa            |  -0.010   -0.023    0.004     -3.7      5.1     -7.2     1.72 |
gfz            |   0.048   -0.022    0.013     -1.0      1.7     -5.0     2.40 |
jpl            |   0.138   -0.040    0.110     -1.9      8.8     -0.5     1.09 |
MIT            |  -0.005   -0.006    0.003      2.4     10.6      3.9     3.11 |
ngs            |   0.100   -0.075   -0.050     -2.8     11.2    -19.8     3.40 |
sio            |  -0.015   -0.050    0.011      5.7     -2.4      6.5    -1.45 |
mit            |   0.004    0.014    0.000     -1.6     -0.5     -1.6     2.71 |
ncl            |   0.022   -0.050    0.016     -0.4      0.5     -5.3     2.14 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     2.25 |
---------------|---------------------------------------------------------------|

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    0.048    0.055      1.3      1.3      1.2     0.20 |
emr            |   0.071    0.070    0.083      1.9      1.9      1.8     0.29 |
esa            |   0.052    0.052    0.060      1.4      1.4      1.4     0.21 |
gfz            |   0.046    0.046    0.053      1.2      1.2      1.2     0.19 |
jpl            |   0.058    0.058    0.066      1.5      1.5      1.5     0.24 |
MIT            |   0.049    0.049    0.056      1.3      1.3      1.3     0.20 |
ngs            |   0.046    0.046    0.054      1.2      1.2      1.2     0.19 |
sio            |   0.046    0.046    0.053      1.2      1.2      1.2     0.19 |
mit            |   0.045    0.046    0.054      1.2      1.2      1.2     0.19 |
ncl            |   0.045    0.045    0.052      1.2      1.2      1.2     0.18 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     1.85 |
---------------|---------------------------------------------------------------|

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

               |      X        Y        Z  |    s X      s Y      s Z  |
               |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
---------------|---------------------------|---------------------------|
igs            |     1.4      7.7     -7.0 |     3.3      3.4      4.6 |
---------------|---------------------------|---------------------------|

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            |     ---        1.4      -0.5       ---      -0.7       --- |
emr            |     ---        3.7       2.1       6.5      -5.6      -8.3 |
esa            |     ---      -15.3      -0.5       ---       3.0       --- |
gfz            |     ---      -10.0       2.1     -13.9       4.2       7.6 |
jpl            |     ---        8.7      -1.8      -8.1       3.3      -4.4 |
MIT            |     ---       14.1      -0.7      -0.9      -6.2       1.5 |
ngs            |     ---        3.6      -2.5      32.0       8.2       5.4 |
sio            |     ---       12.9      -1.0      -6.0       0.8       3.0 |
mit            |     ---       20.9      -1.3      -0.7      -3.7       2.2 |
ncl            |     ---       18.6       0.6       ---       1.3       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       13.5      -2.0      -0.6      28.7       1.9 |
---------------|------------------------------------------------------------|

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

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---        6.5       1.1       ---       0.5       --- |
emr            |     ---        5.3       3.0       8.0       2.1       9.6 |
esa            |     ---       16.0       2.1       ---       4.2       --- |
gfz            |     ---        4.9       2.0       5.8       2.3      10.9 |
jpl            |     ---        6.4       1.1      11.9       2.0       7.2 |
MIT            |     ---        6.2       1.7       5.7       3.4       9.9 |
ngs            |     ---       21.6       3.8      33.1       9.0      26.1 |
sio            |     ---        7.7       4.3      11.3       2.5      13.6 |
mit            |     ---        7.1       2.6       8.3       3.4      10.3 |
ncl            |     ---        1.8       1.2       ---       1.8       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       11.5       8.8      11.4       8.8      24.6 |
---------------|------------------------------------------------------------|

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    gfz13497.snx        |HOFN  A    2|    4.1    -6.9   -30.7|
IGS03P33_RS99.snx    gfz13497.snx        |THU3  A ----|    5.0     2.6   -32.1|
IGS03P33_RS99.snx    gfz13497.snx        |YAR1  A ----|   -3.9     1.5   -30.5|
                                         |            |                       |
IGS03P33_RS99.snx    mit1349g.snx        |HRAO  A ----|   10.1    -0.6   -12.5|
                                         |            |                       |
gfz13497.snx         ngs13497.snx        |AREQ  A    3|    1.3   -49.7     8.3|
gfz13497.snx         ngs13497.snx        |CNMR  A    2|   -0.5    14.9   -67.3|
                                         |            |                       |
MIT13497.snx         ngs13497.snx        |AREQ  A    3|   -4.1   -49.0   -14.0|
                                         |            |                       |
ngs13497.snx         ncl1349g.snx        |CNMR  A    2|    3.0   -11.5    52.9|
                                         |            |                       |
IGS05P45.snx         cod13497.snx        |ALRT  A ----|   -4.5    19.8   -14.2|
                                         |            |                       |
IGS05P45.snx         esa13497.snx        |YAKT  A ----|   15.3     5.7    58.4|
                                         |            |                       |
IGS05P45.snx         gfz13497.snx        |ALRT  A ----|   -3.0    18.0    -6.8|
                                         |            |                       |
IGS05P45.snx         jpl13497.snx        |ALRT  A ----|   -5.5    18.3    -3.3|
IGS05P45.snx         jpl13497.snx        |YAKT  A ----|   -4.2     5.7    44.9|
                                         |            |                       |
IGS05P45.snx         MIT13497.snx        |ALRT  A ----|   -3.6    19.3     0.7|
                                         |            |                       |
IGS05P45.snx         MIT13497.snx        |SUNM  A ----|   -0.2    -2.3    52.3|
                                         |            |                       |
IGS05P45.snx         ngs13497.snx        |NTUS  A    2|   -6.2   -42.6    -0.3|
                                         |            |                       |
IGS05P45.snx         sio13497.snx        |ALRT  A ----|   -2.7    17.6     4.4|
                                         |            |                       |
IGS05P45.snx         mit1349g.snx        |ALRT  A ----|   -3.5    18.6    -3.8|
                                         |            |                       |
IGS05P45.snx         mit1349g.snx        |MAG0  A ----|    5.9     9.6    -3.0|
IGS05P45.snx         mit1349g.snx        |YAKT  A ----|    3.3     0.6    31.2|
                                         |            |                       |
IGS05P45.snx         ncl1349g.snx        |ALRT  A ----|   -3.0    18.6    -4.3|
                                         |            |                       |
IGS05P45.snx         igs05P1349.snx      |ALRT  A ----|   -2.7    17.1    -1.6|
IGS05P45.snx         igs05P1349.snx      |MAG0  A ----|    4.7     8.7    -4.9|
IGS05P45.snx         igs05P1349.snx      |MIZU  A    2|    3.7    -8.0    -1.1|
-----------------------------------------|------------|-----------------------|

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

IERS DOMES NO    MIT    cod    emr    esa    gfz    jpl    ngs    sio    IGS    igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
    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
    50135M001 MAC1 B MAC1 A        MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A
    50103M108 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 DARR A DARW A DARW A DARW A DARW A
                     DARW A                      DARW A
    22003M001 PIMO A PIMO A        PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A
    22306M002 IISC A IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC 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 
    40146S001        UNB1 A                                           UNB1 A UNB1 A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  HLFX A  PALM A  MIA3 A  KYW1 A  ELEN A  MTJO A  HORN A  CNCL A  QUAR A  KARA A
  MAR6 A  IENG A
 
MISSING IERS DOMES NOS AT gfz:
-----------------------------
  BISH A  PALM A
 
MISSING IERS DOMES NOS AT sio:
-----------------------------
  KULU A  SG21 A  OUSD A  CNCL A  KARA A  SAMP A  MERS A  BRAS A
IERS DOMES NO    mit    ncl    IGS    igs
============= ====== ====== ====== ======
    13407S014 MAD2 A 
    13407S012 MADR A MAD2 A MADR A MADR A
                     MADR A
    43001M002 THU2 A THU3 A THU3 A THU3 A
    40451M123 GODZ A GODE A GODE A GODE A
              GODE A 
    50103M113 TID2 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 
    20805M002 ANKR A ANKR A ANKR A ANKR A
 
MISSING IERS DOMES NOS AT mit:
-----------------------------
  KOD1 A  BISH A