Subject: [IGSREPORT-14460] Wk 1399 IGS SINEX Combination
From: "Martin Bourassa" <[email-masked]>
To: [email-masked]
Cc: [email-masked], [email-masked]
Date: Thu, 16 Nov 2006 19:34:41 -0500 (EST)

******************************************************************************
IGS Electronic Report   16 Nov 16:34:45 PST 2006      Message Number 14460
******************************************************************************

Author:  R. Ferland , M. Bourassa

===================================================================
 Combined AC  solution for GPS week 1399 -  06/10/29 to 06/11/04
===================================================================

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)

igs06P1399.snx  Combined weekly solution. 
igs06P1399.erp  Daily Earth Rotation Parameters.
igs00p02.erp    Daily Earth Rotation Parameters since GPS week 1013.
IGS06P44.snx    Cumulative Combined solution. 
igs06P1399.sum  This file.
igs06P1399.itr  Residuals between the AC and the IGb00 for the RF stations. 
igs06P1399.res  Residuals between the AC and the Combined Weekly solution.
IGS06P44.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 = igs06P1399.snx
     IGS = IGS06P44.snx

     MIT = mit13997.snx
     mit = mit1399g.snx

     BuA = IERS Bulletin A

     mit 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  NNOR
             ngs  SEY1
             mit  NNOR

     New stations in the cumulative solution IGS06P44.snx
                  GODZ A ---- KIR0 A ----

     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 |  64 |        24.022 |         1.000 |        24.030 |
emr            |  43 |  28 |         4.936 |         1.000 |         4.937 |
esa            |  65 |  45 |        16.700 |         1.000 |        16.702 |
gfz            | 179 |  71 |         4.735 |         1.000 |         4.736 |
jpl            | 100 |  39 |         6.075 |         1.000 |         6.076 |
MIT            | 144 |  61 |         2.696 |         0.998 |         2.691 |
ngs            | 190 |  66 |        35.699 |         1.000 |        35.704 |
sio            | 163 |  67 |         2.343 |         0.998 |         2.339 |
mit            | 296 |  73 |         0.951 |         1.000 |         0.951 |
igs            | 277 |  76 |         1.367 |         0.999 |         1.365 |
---------------|-----|-----|---------------|---------------|---------------|

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         64 |     0.4      0.2     -0.1 |     4.1      4.5     15.5 |
emr         28 |    -1.1      0.1      0.3 |     5.0      3.6     14.1 |
esa         45 |    -2.8      0.5      0.4 |     4.4      3.9      9.1 |
gfz         71 |    -1.5      0.2      0.0 |     4.1      3.5     12.0 |
jpl         39 |    -1.2      0.2     -0.1 |     4.2      3.9     15.2 |
MIT         61 |    -0.1      0.2      0.6 |     4.2      4.3     12.3 |
ngs         66 |    -0.7      0.1      0.8 |     4.6      5.4     12.5 |
sio         67 |    -0.0      0.1      0.9 |     3.9      4.8     12.1 |
mit         73 |    -0.1      0.1      0.5 |     3.7      4.2     12.0 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        167 |     0.6     -0.1     -0.2 |     1.9      2.6      5.7 |
emr         43 |    -0.6      0.6     -0.4 |     2.3      1.9      5.9 |
esa         64 |    -2.0     -0.5      0.8 |     2.4      3.1     10.9 |
gfz        176 |    -1.0     -0.5     -1.3 |     1.3      1.6      3.4 |
jpl         99 |    -0.8      0.7     -0.7 |     2.0      3.7      9.7 |
MIT        133 |     0.4      0.1     -1.0 |     1.5      1.6      4.3 |
ngs        184 |     0.5      0.2     -1.0 |     2.1      3.1      6.5 |
sio        156 |     0.2      0.5     -2.2 |     1.6      2.2      3.6 |
mit        267 |     0.6      0.2     -0.2 |     0.7      0.7      2.0 |
ITR         75 |     0.5     -0.1     -1.6 |     3.6      4.0     12.1 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        152 |    -0.5      0.4      0.7 |     2.8      3.4      7.5 |
emr         41 |    -1.6      0.4      1.2 |     2.9      2.0      8.1 |
esa         62 |    -3.4     -0.5      0.4 |     2.7      3.4     10.9 |
gfz        162 |    -2.0     -0.4     -0.2 |     2.4      2.2      5.9 |
jpl         91 |    -1.8      0.4      0.2 |     2.6      3.4     11.0 |
MIT        128 |    -0.6      0.2     -0.1 |     2.5      2.8      6.5 |
ngs        156 |    -0.6      0.6     -0.4 |     2.9      4.6      7.8 |
sio        145 |    -0.8      0.5     -0.9 |     2.5      3.1      6.4 |
mit        218 |    -0.4      0.6      0.5 |     2.1      2.6      5.6 |
igs        224 |    -1.0      0.3      0.9 |     1.8      2.1      5.0 |
ITR         84 |    -0.4     -0.1     -0.8 |     2.6      2.9      8.2 |
---------------|---------------------------|---------------------------|

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            |   0.016   -0.020    0.001     16.2      8.1     -7.6     3.38 |
emr            |  -0.003   -0.051    0.011     -1.6      4.1    -13.2     4.61 |
esa            |   0.001    0.034    0.018      0.7     12.3    -18.4     2.11 |
gfz            |   0.040   -0.013    0.009     -1.2      1.6     -4.6     2.67 |
jpl            |   0.189   -0.037    0.108      1.0      3.9      4.5     1.61 |
MIT            |   0.010   -0.011    0.014      2.2     16.8     -0.1     3.52 |
ngs            |   0.062   -0.038    0.006      4.1      6.2      5.3     3.26 |
sio            |   0.028   -0.028    0.002      1.5      1.5      8.7     3.60 |
mit            |  -0.011    0.016   -0.007     -2.0     -1.9     -1.1     3.23 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     3.05 |
---------------|---------------------------------------------------------------|

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            |   0.050    0.051    0.057      1.3      1.3      1.3     0.20 |
emr            |   0.071    0.075    0.087      1.9      1.9      1.9     0.30 |
esa            |   0.056    0.058    0.066      1.5      1.5      1.5     0.23 |
gfz            |   0.046    0.047    0.054      1.2      1.2      1.2     0.19 |
jpl            |   0.060    0.063    0.070      1.6      1.6      1.6     0.25 |
MIT            |   0.050    0.050    0.057      1.3      1.3      1.3     0.20 |
ngs            |   0.048    0.049    0.057      1.3      1.3      1.3     0.20 |
sio            |   0.047    0.049    0.055      1.2      1.2      1.2     0.19 |
mit            |   0.046    0.047    0.054      1.2      1.2      1.2     0.19 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.94 |
---------------|---------------------------------------------------------------|

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

               |      X        Y        Z  |    s X      s Y      s Z  |
               |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
---------------|---------------------------|---------------------------|
igs            |     4.4      8.6     -3.8 |     3.0      3.1      4.4 |
---------------|---------------------------|---------------------------|

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            |     ---        1.3       3.2       ---      -2.3       --- |
emr            |     ---       10.8       5.3      18.5      -9.5     -18.3 |
esa            |     ---       -2.8       1.9       ---      -6.0       --- |
gfz            |     ---       -3.2      -0.7      -6.1       3.5      -7.5 |
jpl            |     ---      -12.5      -0.8      11.1      -6.0      -6.7 |
MIT            |     ---       -7.6      -1.3       0.1      -6.6      -0.1 |
ngs            |     ---       23.2      -9.8      31.7      19.3     -19.5 |
sio            |     ---       -5.8       2.6      -0.9      -8.0       1.6 |
mit            |     ---       24.8      -3.1       0.1       0.7       0.4 |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       14.5      -2.9       0.2      36.1      -1.5 |
---------------|------------------------------------------------------------|

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

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---        3.4       1.9       ---       0.8       --- |
emr            |     ---        8.6       6.0      17.0       3.5      14.3 |
esa            |     ---       13.4       1.7       ---       4.4       --- |
gfz            |     ---        3.0       2.3       5.5       1.8       8.0 |
jpl            |     ---       10.9       2.3      18.7       2.5      12.3 |
MIT            |     ---        6.9       2.5       8.0       2.4       6.2 |
ngs            |     ---       20.9       5.7      26.4      12.0      13.5 |
sio            |     ---        3.4       3.3      11.6       2.7       9.0 |
mit            |     ---        6.9       2.7       5.0       1.8       3.1 |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       10.4       2.6       7.0       4.2       6.5 |
---------------|------------------------------------------------------------|

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    cod13997.snx        |GOUG  A ----|    5.4     1.7   102.7|
                                         |            |                       |
IGS03P33_RS99.snx    cod13997.snx        |MKEA  A ----|   -4.4    16.5    11.6|
IGS03P33_RS99.snx    cod13997.snx        |URUM  A ----|   -0.0   -12.5    19.5|
                                         |            |                       |
IGS03P33_RS99.snx    gfz13997.snx        |AUCK  A ----|   -1.1   -11.2    -0.3|
IGS03P33_RS99.snx    gfz13997.snx        |HOFN  A    2|    7.2    -9.4   -30.3|
                                         |            |                       |
IGS03P33_RS99.snx    gfz13997.snx        |GUAM  A    2|  -10.7    -5.0     1.4|
                                         |            |                       |
IGS03P33_RS99.snx    jpl13997.snx        |GOUG  A ----|    8.0    -1.1    68.8|
                                         |            |                       |
IGS03P33_RS99.snx    MIT13997.snx        |ALGO  A ----|    2.8    -0.3    17.9|
IGS03P33_RS99.snx    MIT13997.snx        |GOUG  A ----|    7.1    -2.3    69.6|
                                         |            |                       |
IGS03P33_RS99.snx    ngs13997.snx        |LAMA  A ----|   -6.1    -2.2  -100.3|
                                         |            |                       |
IGS03P33_RS99.snx    sio13997.snx        |GOUG  A ----|   11.9    -5.0    73.7|
IGS03P33_RS99.snx    sio13997.snx        |TSKB  A ----|    1.2     0.4   -21.6|
                                         |            |                       |
IGS03P33_RS99.snx    mit1399g.snx        |GOUG  A ----|    8.0    -2.3    93.5|
                                         |            |                       |
jpl13997.snx         MIT13997.snx        |SUNM  A ----|    7.4    -8.0    66.0|
                                         |            |                       |
jpl13997.snx         mit1399g.snx        |UNFE  A ----|    2.4     1.4   -85.7|
                                         |            |                       |
IGS06P43.snx         cod13997.snx        |MSKU  A ----|  -11.8    24.0   -19.5|
IGS06P43.snx         cod13997.snx        |YAKT  A ----|   -1.3   -14.2     1.8|
                                         |            |                       |
IGS06P43.snx         gfz13997.snx        |HOLB  A ----|   -0.2    -0.9   -33.0|
IGS06P43.snx         gfz13997.snx        |MSKU  A ----|  -16.1    16.7   -17.2|
                                         |            |                       |
IGS06P43.snx         jpl13997.snx        |MSKU  A ----|  -16.4    19.8   -27.4|
                                         |            |                       |
IGS06P43.snx         MIT13997.snx        |SAMP  A    2|  -22.9   -21.7     4.9|
                                         |            |                       |
IGS06P43.snx         sio13997.snx        |TROM  A ----|   -0.3    13.8   -12.3|
                                         |            |                       |
IGS06P43.snx         igs06P1399.snx      |KOUR  A ----|   -7.6    -2.6     2.3|
IGS06P43.snx         igs06P1399.snx      |PRDS  A ----|   -8.5     0.2     2.2|
-----------------------------------------|------------|-----------------------|

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
                                                                      GODZ A GODZ A
    40405S038 GOL2 A 
    40405S031        GOLD A        GOLD A GOLD A        GOLD A GOL2 A GOLD A GOLD A
    92201M012        FAA1 A        FAAA A                                    FAA1 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 DARW A DARR A DARW A DARW A DARW A DARW A
    22306M002 IISC A IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A
    43401M001        BDOS A               BDOS A                      BDOS A BDOS A
                                                                      BDOS A BDOS A
    43005M002        KELY B        KELY B KELY B        KELY B KELY B KELY A KELY A
    10422M001        KIR0 A                      KIR0 A KIR0 A        KIR0 A KIR0 A
                                                                      KR0G A KR0G A
    22003M001        PIMO A        PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A
    20703S001        RAMO A               RAMO A        RAMO A        ELRO A RAMO A
                                                                      RAMO A 
    23603S002        TWTF A               TWTF A TWTF A TWTF A TWTF A TWTF A TWTF A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  HLFX A  PALM A  PUR3 A  MIA3 A  CCV3 A  KYW1 A  MCD1 A  ELEN A  OUSD A  MTJO A
  HORN A  CNCL A  QUAR A  KARA A  SAMP A  MAR6 A
 
MISSING IERS DOMES NOS AT gfz:
-----------------------------
  PALM A
 
MISSING IERS DOMES NOS AT ngs:
-----------------------------
  AZCO A  DWH1 A  GODZ A  HAMM A  MCN1 A  MLF1 A  NISU A  RESO A  SUTB A
 
MISSING IERS DOMES NOS AT sio:
-----------------------------
  KULU A  SG21 A  OUSD A  CNCL A  KARA A
 
MISSING IERS DOMES NOS AT igs:
-----------------------------
  FAAA A
IERS DOMES NO    mit    IGS    igs
============= ====== ====== ======
    43005M002 KELY B KELY A KELY A
    43401M001 BDOS A BDOS A BDOS A
                     BDOS A BDOS A
    43001M002 THU2 A THU3 A THU3 A
    40451M123 GODE A GODE A GODE A
                     GODZ A GODZ A
    92201M012 FAA1 A        FAA1 A
              FAAA A
    66006S002 SYOG A SYOG A SYOG A
 
MISSING IERS DOMES NOS AT mit:
-----------------------------
  SUTB A  AIS1 A  KOD1 A
 
MISSING IERS DOMES NOS AT igs:
-----------------------------
  FAAA A