Subject: [IGSREPORT-14490] Wk 1400 IGS SINEX Combination (Resubmission)
From: "Remi Ferland" <[email-masked]>
To: [email-masked]
Cc: [email-masked], [email-masked]
Date: Sat, 25 Nov 2006 07:33:15 -0500 (EST)

******************************************************************************
IGS Electronic Report   25 Nov 04:33:18 PST 2006      Message Number 14490
******************************************************************************

Author:  R. Ferland , M. Bourassa 

===================================================================
 Combined AC  solution for GPS week 1400 -  06/11/05 to 06/11/11
===================================================================

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)

igs06P1400.snx  Combined weekly solution. 
igs06P1400.erp  Daily Earth Rotation Parameters.
igs00p02.erp    Daily Earth Rotation Parameters since GPS week 1013.
IGS06P45.snx    Cumulative Combined solution. 
igs06P1400.sum  This file.
igs06P1400.itr  Residuals between the AC and the IGS05 for the RF stations. 
igs06P1400.res  Residuals between the AC and the Combined Weekly solution.
IGS06P45.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
     IGS05 stations at the current epoch.
     ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS05.SNX.Z
3-4) The AC are compared to IGS05, 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 IGS05 of the current
     epoch using a 7-parameters transformation. The singular cumulative
     combined solution is aligned to the IGS05 of the reference epoch
     using a 14-parameters transformation and the 132 ITRF station positions
     and velocities. The IGS05 is a realization of ITRF2005.

     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 = IGS05.snx
     igs = igs06P1400.snx
     IGS = IGS06P45.snx

     MIT = mit14007.snx
     mit = mit1400g.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:
         From the original solution:
             sio  SATA
         After unconstraining:
             esa  NNOR
             jpl  GOUG  MCM4
             mit  CRAO  NNOR  SCOR  WAB2
             sio  GOUG
             igs  GOUG

     New stations in the cumulative solution IGS06P45.snx
                  SCIP A    2 SFDM A    1 SNI1 A    3 

     4-1) Starting with GPS week 1400, the solutions are aligned to the
     IGS05.snx realization of ITRF2005.

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

     4-3) Starting with this week combination, the weekly and the
     cumulative solutions are aligned to the IGS realization of
     ITRF2005 "IGS05.snx". See [IGSMAIL-5447] and [IGSMAIL-5455]:
     http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00170.html
     http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00178.html
     This new realization:
       1) is based on 132 globally distributed stations,
       2) The coordinates originate from ITRF2005.
       3) Relative to absolute antenna phase center changes were
     also applied.
     The coordinates for the weekly AC solutions and IGS weekly
     combination also used absolute antenna phase center models.
     The coordinates for the IGS cumulative solution were corrected
     for the relative to absolute phase center variations. The
     IGS cumulative solution was also updated to be fully consistent
     with the latest discontinuity table.

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            | 175 | 107 |        22.921 |         1.001 |        22.939 |
emr            |  47 |  46 |         5.016 |         1.000 |         5.018 |
esa            |  65 |  54 |        18.100 |         1.000 |        18.102 |
gfz            | 184 | 112 |         5.196 |         1.001 |         5.202 |
jpl            | 118 |  69 |         5.804 |         1.000 |         5.807 |
MIT            | 151 |  97 |         2.880 |         1.001 |         2.884 |
ngs            | 188 | 108 |        27.885 |         1.001 |        27.903 |
sio            | 165 | 110 |         2.505 |         1.001 |         2.508 |
mit            | 263 | 120 |         1.377 |         1.001 |         1.378 |
igs            | 280 | 125 |         1.381 |         1.000 |         1.381 |
---------------|-----|-----|---------------|---------------|---------------|

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

5-2-1)    With respect to the IGS05 stations:
=============================================

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        107 |    -0.6     -0.3     -0.0 |     3.2      3.2      7.6 |
emr         46 |     0.8     -0.0      0.1 |     3.3      2.5      8.8 |
esa         54 |    -1.0      0.2     -0.5 |     3.5      2.3     11.8 |
gfz        112 |    -0.6      0.1     -0.2 |     2.6      1.9      6.6 |
jpl         69 |     0.4     -0.2      0.6 |     2.6      2.8     11.1 |
MIT         97 |     0.1      0.0     -0.1 |     2.7      2.0      6.7 |
ngs        108 |    -0.5      0.1      0.1 |     2.8      2.6      6.4 |
sio        110 |     0.9     -0.0     -0.1 |     2.6      3.1      6.9 |
mit        120 |    -0.2      0.1      0.6 |     2.2      2.0      7.1 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        173 |     0.0     -0.3     -0.3 |     1.9      2.3      4.6 |
emr         47 |     0.9      0.1     -1.1 |     1.6      1.6      6.4 |
esa         63 |    -0.5      0.4     -0.1 |     2.5      2.2     13.1 |
gfz        182 |    -0.3      0.1     -0.3 |     0.9      1.3      3.3 |
jpl        116 |     0.6     -0.3     -0.5 |     2.0      2.0      9.5 |
MIT        142 |     0.1      0.0     -0.4 |     1.5      1.3      3.9 |
ngs        181 |    -0.2      0.0      0.5 |     1.6      2.1      4.3 |
sio        159 |     1.2      0.2     -0.3 |     1.0      2.7      3.7 |
mit        238 |     0.0      0.1      1.0 |     1.0      1.3      5.1 |
ITR        124 |     0.3      0.0     -0.2 |     2.3      1.8      5.6 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        157 |    -0.8     -0.0      0.0 |     2.6      3.1      6.7 |
emr         46 |     0.4     -0.2     -0.5 |     3.0      2.5      7.3 |
esa         63 |    -0.6      0.0      0.1 |     3.7      3.4     13.6 |
gfz        167 |    -1.0      0.1     -0.2 |     2.2      1.7      5.9 |
jpl        102 |    -0.2     -0.4     -0.2 |     2.5      2.9     11.4 |
MIT        136 |    -0.4      0.0     -0.4 |     2.6      2.5      5.8 |
ngs        154 |    -1.0      0.4      0.6 |     2.5      3.3      6.7 |
sio        147 |     0.4      0.0      0.1 |     2.3      3.5      6.2 |
mit        196 |    -0.8      0.3      1.4 |     2.1      2.7      6.8 |
igs        226 |    -0.7      0.2      0.3 |     1.8      1.8      5.0 |
ITR        129 |    -0.2      0.1     -0.1 |     1.5      1.2      5.0 |
---------------|---------------------------|---------------------------|

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   -0.001    0.015      0.2      0.1      0.3    -0.13 |
emr            |   0.041   -0.016   -0.002     -8.0      1.3     -4.5    -0.26 |
esa            |  -0.015   -0.027    0.011     -3.4      6.2    -25.0    -0.81 |
gfz            |  -0.006   -0.006    0.002      0.3     -0.0      1.0    -0.56 |
jpl            |   0.208   -0.074    0.323      0.2      4.0     13.9     0.09 |
MIT            |   0.007   -0.002    0.003      4.8     11.0     -4.9     0.02 |
ngs            |   0.062   -0.057    0.009      4.8      4.6      5.5    -1.10 |
sio            |   0.126   -0.062    0.036     -2.1      6.6    -22.7    -0.15 |
mit            |   0.002    0.007   -0.002      0.1      0.3      0.9    -1.37 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0    -0.36 |
---------------|---------------------------------------------------------------|

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            |   0.038    0.041    0.042      1.0      1.0      1.0     0.16 |
emr            |   0.056    0.060    0.063      1.5      1.5      1.5     0.23 |
esa            |   0.051    0.054    0.059      1.4      1.4      1.4     0.21 |
gfz            |   0.038    0.039    0.042      1.0      1.0      1.0     0.15 |
jpl            |   0.047    0.050    0.052      1.3      1.3      1.2     0.20 |
MIT            |   0.040    0.042    0.044      1.1      1.1      1.0     0.16 |
ngs            |   0.038    0.041    0.043      1.0      1.0      1.0     0.16 |
sio            |   0.037    0.040    0.042      1.0      1.0      1.0     0.16 |
mit            |   0.036    0.038    0.040      1.0      1.0      1.0     0.15 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.42 |
---------------|---------------------------------------------------------------|

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

               |      X        Y        Z  |    s X      s Y      s Z  |
               |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
---------------|---------------------------|---------------------------|
igs            |     2.9      9.4      3.1 |     2.8      2.9      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            |     ---        ---       1.6       ---      -5.1       --- |
emr            |     ---       11.5      -1.6      -2.5      -5.0      -1.3 |
esa            |     ---       -7.6       0.5       ---      -6.2       --- |
gfz            |     ---       -6.2       2.8     -10.4      -1.1      -2.7 |
jpl            |     ---        3.1       1.2     -13.2      -3.8      -1.8 |
MIT            |     ---        4.1      -0.3       0.3      -2.4      -1.4 |
ngs            |     ---       22.5     -12.9      34.9      11.5     -42.9 |
sio            |     ---       13.1       3.4       0.0      -1.3      -0.6 |
mit            |     ---       13.0       5.8      -7.1      -1.7       5.1 |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       11.9     -10.2      -0.6      26.9      -1.1 |
---------------|------------------------------------------------------------|

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

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---        ---       2.1       ---       1.5       --- |
emr            |     ---        5.4       3.4      16.2       2.8       7.5 |
esa            |     ---       14.9       3.5       ---       1.5       --- |
gfz            |     ---        7.7       2.4       9.5       0.9       6.6 |
jpl            |     ---       15.8       2.7      20.0       2.3      15.8 |
MIT            |     ---        8.8       2.1       7.5       2.5       7.9 |
ngs            |     ---       14.8       5.5      19.2       3.9      29.2 |
sio            |     ---        3.6       2.7       5.9       1.9       7.8 |
mit            |     ---       10.1       4.6       8.6       7.1      18.6 |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       23.2       3.0      17.0       7.2      27.1 |
---------------|------------------------------------------------------------|

5-6)      Satellite Antenna Offset Residuals weighted Average & STD :
=====================================================================

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      X        Y        Z  |      X        Y        Z  |
---------------|---------------------------|---------------------------|
cod         43 |     3.5      0.5    -72.9 |    11.4     12.0     62.4 |
emr         30 |     ---      ---    224.4 |     ---      ---     99.5 |
esa          0 |     ---      ---      --- |     ---      ---      --- |
gfz          0 |     ---      ---      --- |     ---      ---      --- |
jpl          0 |     ---      ---      --- |     ---      ---      --- |
MIT          0 |     ---      ---      --- |     ---      ---      --- |
ngs          0 |     ---      ---      --- |     ---      ---      --- |
sio          0 |     ---      ---      --- |     ---      ---      --- |
mit          0 |     ---      ---      --- |     ---      ---      --- |
---------------|---------------------------|---------------------------|

5-7)      Outliers:
===================

Thresholds set at 5 sigmas and 50 mm.

 Solution             Solution           |  Station   |    N       E       U  |
              Minus                      |code id soln|   (mm)    (mm)    (mm)|
-----------------------------------------|------------|-----------------------|
                                         |            |                       |
ITRF_IGS05.snx       jpl14007.snx        |ASPA  A    1|   -2.0     3.0   -47.2|
                                         |            |                       |
ITRF_IGS05.snx       mit1400g.snx        |NOVJ  A    1|    3.4     0.6    54.2|
                                         |            |                       |
MIT14007.snx         mit1400g.snx        |GOUG  A    1|   -0.7    -2.4    66.6|
                                         |            |                       |
IGS06P44.snx         cod14007.snx        |MSKU  A    1|  -12.1    18.7   -12.6|
                                         |            |                       |
IGS06P44.snx         gfz14007.snx        |MSKU  A    1|  -13.0    15.1   -11.2|
                                         |            |                       |
IGS06P44.snx         MIT14007.snx        |OUSD  A    1|   -3.8     3.4    44.1|
                                         |            |                       |
IGS06P44.snx         ngs14007.snx        |YAKT  A    1|    2.0   -12.8    -6.5|
                                         |            |                       |
                                         |            |                       |
IGS06P44.snx         igs06P1400.snx      |MSKU  A    1|  -11.2    18.0   -14.3|
IGS06P44.snx         igs06P1400.snx      |YAKT  A    1|    3.5    -7.2     0.4|
-----------------------------------------|------------|-----------------------|

5-8)      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
    40405S031 GOL2 A GOLD A        GOLD A GOLD A        GOLD A GOL2 A GOLD A GOLD A
    92201M012        FAA1 A        FAAA A
    50103M108 TIDB A        TIDB A TIDB A TIDB A TID1 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
    50107M004 YAR2 A YAR2 A               YAR2 A               YAR2 A YAR1 A YAR1 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 BDOS A
    43005M002        KELY B        KELY B KELY B KELY B KELY B KELY A KELY A KELY A
    10422M001        KIR0 A                      KIR0 A KIR0 A        KR0G A KR0G A
    20703S001        RAMO A               RAMO A        RAMO A        ELRO A RAMO A
                                                                      RAMO A 
    23903M001        SUWN A               SUWN A        SUWN A SUWN A SUWN A SUWN A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  HLFX A  PALM A  PUR3 A  MIA3 A  KYW1 A  MCD1 A  ELEN A  OUSD A  MTJO A  HORN A
  CNCL A  QUAR A  KARA A  MAR6 A
 
MISSING IERS DOMES NOS AT gfz:
-----------------------------
  PALM A
 
MISSING IERS DOMES NOS AT ngs:
-----------------------------
  DWH1 A  GODZ A  HAMM A  LEBA A  MCN1 A  MLF1 A  NISU A  SUTB A  AZCO A
 
MISSING IERS DOMES NOS AT sio:
-----------------------------
  KULU A  SG21 A  OUSD A  CNCL A  KARA A
IERS DOMES NO    mit    IGS    igs
============= ====== ====== ======
    13407S012 MAD2 A MADR A MADR A
              MADR A
    43401M001 BDOS A BDOS A BDOS A
                     BDOS A BDOS A
    43001M003 THU3 A
    43001M002 THU2 A THU3 A THU3 A
    50107M004 YAR2 A YAR1 A YAR1 A
    20703S001 RAMO A ELRO A RAMO A
                     RAMO A 
    30302M009 HARB A HARB A HARB A
 
MISSING IERS DOMES NOS AT mit:
-----------------------------
  KULU A  PALM A  PUR3 A  GODZ A  MIA3 A  KYW1 A  MCD1 A  MCN1 A  LEBA A  MLF1 A
  HAMM A  SG21 A  AZCO A  SFDM A  SUTB A  AIS1 A  KOD1 A  OUSD A  MTJO A  HORN A
  CNCL A  QUAR A  KARA A  MAR6 A