Subject: [IGSREPORT-15750] Wk 1455 IGS SINEX Combination
From: "IGS SINEX" <[email-masked]>
To: [email-masked]
Cc: [email-masked], [email-masked]
Date: Thu, 13 Dec 2007 01:34:18 -0500

******************************************************************************
IGS Electronic Report   12 Dec 22:34:22 PST 2007      Message Number 15750
******************************************************************************

Author:  R. Ferland, M. Bourassa

===============================================================
 Combined AC solution for GPS week 1455 - 07/11/25 to 07/12/01
===============================================================

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)

igs07P1455.snx  Combined weekly solution. 
igs07P1455.erp  Daily Earth Rotation Parameters.
igs00p03.erp    Daily Earth Rotation Parameters since GPS week 860. 
IGS07P48.snx    Cumulative Combined solution. 
igs07P1455.sum  This file.
igs07P1455.itr  Residuals between the AC and the IGS05 for the RF stations. 
igs07P1455.res  Residuals between the AC and the Combined Weekly solution.
IGS07P48.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
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 = igs07P1455.snx
     IGS = IGS07P48.snx

     MIT = mit14557.snx
     mit = mit1455g.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:
         From the original solution:
             cod  SATA  X  Y  Z
             emr  SATA  X  Y  Z
             gfz  SATA  X  Y  Z
             MIT  SATA  X  Y  Z
             sio  SATA  X  Y  Z
             mit  SATA  X  Y  Z
         After unconstraining:
             ncl  YSSK

     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 GPS week 1412, the accumulated ERP file has been
          changed from "igs00p02.erp" to "igs00p03.erp". The main changes
          are:
       1) Correction of the pole position from IGb00 to IGS05 using the
          transformation in:
             http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00178.html
       2) Marginal ERP's in GPS week 1161 were replaced by reprocessed
          values.

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            | 179 | 100 |        29.137 |         1.000 |        29.139 |
emr            |  59 |  44 |         4.852 |         1.000 |         4.852 |
esa            |  65 |  47 |        17.303 |         0.999 |        17.286 |
gfz            | 176 | 100 |         7.759 |         1.000 |         7.757 |
jpl            | 121 |  73 |         5.698 |         0.999 |         5.692 |
MIT            | 249 | 110 |         2.903 |         1.000 |         2.903 |
ngs            | 196 | 109 |        43.446 |         0.896 |        38.947 |
sio            | 171 |  98 |         3.446 |         0.999 |         3.442 |
mit            | 312 | 109 |         2.090 |         1.001 |         2.091 |
ncl            | 193 | 110 |         4.108 |         1.000 |         4.110 |
igs            | 277 | 112 |         1.286 |         1.008 |         1.297 |
---------------|-----|-----|---------------|---------------|---------------|

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        100 |    -0.8     -0.1     -0.3 |     3.0      2.9      8.7 |
emr         44 |    -0.3      0.1     -0.1 |     3.9      2.7      9.5 |
esa         47 |    -1.6     -0.1      0.2 |     3.3      2.7     11.0 |
gfz        100 |    -0.5      0.0      0.1 |     3.0      2.3      7.5 |
jpl         73 |     1.3      0.2      0.3 |     2.8      3.0      9.1 |
MIT        110 |     0.8      0.2     -0.1 |     2.7      2.4      7.2 |
ngs        109 |     0.4      0.0      0.0 |     3.0      1.9      7.5 |
sio         98 |     1.1      0.1      0.0 |     2.7      3.0      7.8 |
mit        109 |    -0.4      0.0      0.2 |     2.7      2.3      6.9 |
ncl        110 |     0.0      0.0      0.1 |     0.5      0.5      0.9 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        172 |    -0.9     -0.5     -0.8 |     1.4      1.6      4.3 |
emr         57 |     0.1      0.1     -0.8 |     2.5      2.2      5.9 |
esa         62 |    -1.2     -0.3      0.2 |     2.5      2.6     10.2 |
gfz        171 |    -0.5     -0.3     -0.2 |     1.0      1.0      3.3 |
jpl        118 |     1.7      0.2     -0.2 |     1.2      2.0      4.4 |
MIT        218 |     0.6      0.1     -0.3 |     1.0      0.9      3.7 |
ngs        192 |    -0.2     -0.1     -0.6 |     2.1      1.7      3.6 |
sio        162 |     0.8      0.1     -1.2 |     1.0      1.5      4.2 |
mit        273 |    -0.6     -0.1      0.0 |     0.9      0.5      2.3 |
ncl        185 |    -0.1      0.1      0.0 |     2.3      2.3      6.0 |
ITR        111 |    -0.1     -0.1     -0.1 |     2.4      2.1      6.6 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        170 |    -1.1     -0.3     -0.5 |     2.4      2.7      6.3 |
emr         58 |    -0.5      0.0     -0.6 |     3.9      2.4      7.1 |
esa         62 |    -2.1     -0.5     -0.3 |     3.7      3.1     10.9 |
gfz        170 |    -0.7     -0.2      0.1 |     2.5      1.8      5.3 |
jpl        110 |     1.3      0.4      0.2 |     2.4      3.0      6.2 |
MIT        199 |     0.3      0.2      0.1 |     1.9      1.7      6.0 |
ngs        188 |    -0.3      0.1     -0.7 |     2.0      2.3      5.1 |
sio        162 |     0.5      0.0     -0.8 |     2.5      2.7      5.7 |
mit        247 |    -0.8      0.1      0.2 |     2.0      2.0      4.9 |
ncl        184 |    -0.4      0.2      0.1 |     2.5      2.3      5.3 |
igs        240 |    -0.1      0.2      0.2 |     1.4      1.5      4.1 |
ITR        128 |    -0.3      0.0     -0.2 |     2.0      1.7      6.8 |
---------------|---------------------------|---------------------------|

5-3)      7-Parameters Transformation: AC ----> IGS05.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   -0.000   -0.000      0.0      0.5      0.3     0.06 |
emr            |   0.010    0.003    0.010     -1.6     -2.2      4.5     0.17 |
esa            |   0.006   -0.019    0.029      4.7      2.6      6.0    -1.07 |
gfz            |  -0.004   -0.012    0.004      0.4      0.0      0.5    -0.16 |
jpl            |  -0.001   -0.010   -0.012     -1.5      1.0     14.0     0.18 |
MIT            |   0.011    0.012   -0.006      4.6      2.8     16.7    -0.24 |
ngs            |   0.028   -0.058    0.009      2.6      1.5     -4.0    -0.81 |
sio            |   0.048    0.020   -0.012      2.4      7.0     39.5     0.36 |
mit            |  -0.007    0.014   -0.006     -0.3      0.1      0.8    -0.25 |
ncl            |   0.002   -0.000   -0.003      0.5      0.3      1.0    -0.18 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0    -0.17 |
---------------|---------------------------------------------------------------|

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            |   0.040    0.043    0.043      1.1      1.1      1.0     0.16 |
emr            |   0.058    0.065    0.063      1.6      1.6      1.6     0.24 |
esa            |   0.055    0.060    0.061      1.5      1.5      1.5     0.23 |
gfz            |   0.040    0.042    0.044      1.1      1.1      1.1     0.16 |
jpl            |   0.048    0.051    0.051      1.3      1.3      1.3     0.20 |
MIT            |   0.038    0.041    0.042      1.0      1.0      1.0     0.16 |
ngs            |   0.038    0.041    0.042      1.0      1.0      1.0     0.16 |
sio            |   0.039    0.043    0.044      1.1      1.1      1.1     0.16 |
mit            |   0.038    0.040    0.042      1.0      1.0      1.0     0.16 |
ncl            |   0.038    0.041    0.042      1.0      1.0      1.0     0.16 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.51 |
---------------|---------------------------------------------------------------|

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

               |      X        Y        Z  |    s X      s Y      s Z  |
               |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
---------------|---------------------------|---------------------------|
igs            |     2.9      4.3     13.0 |     2.2      2.2      3.2 |
---------------|---------------------------|---------------------------|

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            |     ---        ---      -2.8       ---      -0.1       --- |
emr            |     ---       11.5      -1.4      -9.3       1.5     -35.9 |
esa            |     ---       13.4      -4.8       ---      -0.8       --- |
gfz            |     ---       15.2      -2.8      -1.6       1.3       0.3 |
jpl            |     ---     -163.5       2.0      13.9       1.1     -22.9 |
MIT            |     ---        0.1       4.0     -14.3       0.6      -1.0 |
ngs            |     ---        8.8      -3.5      22.2      -7.5     -15.7 |
sio            |     ---       -6.2      -3.2       ---      -0.4       --- |
mit            |     ---        7.0      -3.9       0.5      -0.1     -20.9 |
ncl            |     ---       18.3      -1.0       ---       2.5       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---        5.6      -0.2      -0.1      -5.5     -16.6 |
---------------|------------------------------------------------------------|

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

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---        ---       2.1       ---       1.3       --- |
emr            |     ---        8.9       3.1      15.5       3.1      11.8 |
esa            |     ---       22.6       2.7       ---       3.0       --- |
gfz            |     ---        5.1       1.6       6.6       2.8      16.3 |
jpl            |     ---       37.9       1.9      10.9       2.2      11.8 |
MIT            |     ---        5.4       1.8       7.2       2.2      11.4 |
ngs            |     ---       17.6       3.8      16.9       1.3      18.1 |
sio            |     ---       12.4       2.1       ---       3.6       --- |
mit            |     ---       11.0       2.2      13.6       3.7      15.6 |
ncl            |     ---        3.5       1.5       ---       1.2       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       13.5       6.4       7.3       3.9      15.3 |
---------------|------------------------------------------------------------|

5-6)      Satellite Antenna Offset Residuals weighted Average & STD:
====================================================================
          No Satellite phase center ... 

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       MIT14557.snx        |THU3  A    1|    0.0     1.9   -22.9|
                                         |            |                       |
ITRF_IGS05.snx       mit1455g.snx        |KUNM  A    2|    2.2     0.7    26.7|
ITRF_IGS05.snx       mit1455g.snx        |THU3  A    1|   -0.9     1.3   -17.5|
                                         |            |                       |
gfz14557.snx         ngs14557.snx        |URUM  A    1|    0.1   -14.9    -6.0|
                                         |            |                       |
IGS07P47.snx         esa14557.snx        |KIRU  A    1|    0.8     2.5   -79.1|
                                         |            |                       |
IGS07P47.snx         gfz14557.snx        |KIRU  A    1|   -3.7    -0.4   -65.0|
                                         |            |                       |
IGS07P47.snx         jpl14557.snx        |MTBG  A    1|    1.0    -5.5   112.5|
                                         |            |                       |
IGS07P47.snx         MIT14557.snx        |KIRU  A    1|   -5.1     0.9   -80.7|
IGS07P47.snx         MIT14557.snx        |MEDI  A    2|    1.3    15.7    -8.3|
                                         |            |                       |
IGS07P47.snx         ngs14557.snx        |KIRU  A    1|   -8.0    -0.5   -80.8|
IGS07P47.snx         ngs14557.snx        |MEDI  A    2|   -1.0    18.2    -8.6|
                                         |            |                       |
IGS07P47.snx         ngs14557.snx        |RESO  A    1|    8.6   -11.4   -13.5|
                                         |            |                       |
IGS07P47.snx         mit1455g.snx        |KIRU  A    1|   -4.7     0.0   -74.0|
                                         |            |                       |
IGS07P47.snx         mit1455g.snx        |MTBG  A    1|   -1.0    -5.5   115.4|
                                         |            |                       |
IGS07P47.snx         ncl1455g.snx        |KIRU  A    1|   -2.3     0.6   -80.8|
                                         |            |                       |
igs07P1455.snx       ncl1455g.snx        |COCO  A    4|   10.4     1.6     1.7|
igs07P1455.snx       ncl1455g.snx        |MAC1  A    7|  -10.6    -3.5     1.2|
                                         |            |                       |
IGS07P47.snx         igs07P1455.snx      |NTUS  A    4|  -11.5    -8.3    11.3|
IGS07P47.snx         igs07P1455.snx      |RESO  A    1|    9.3   -10.2    -8.2|
                                         |            |                       |
IGS07P48.snx         igs07P1455.snx      |AREQ  A    5|   -6.8     0.8     2.1|
IGS07P48.snx         igs07P1455.snx      |INVK  A    2|    8.7     0.3    -7.6|
IGS07P48.snx         igs07P1455.snx      |MEDI  A    2|    0.9    16.0    -7.4|
IGS07P48.snx         igs07P1455.snx      |UNSA  A    1|   -7.0     0.7     2.0|
-----------------------------------------|------------|-----------------------|

5-8)      Conflicts:
====================

IERS DOMES NO    cod    emr    esa    gfz    jpl    MIT    ngs    sio    igs    IGS
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
    42202M005 AREQ A AREQ A AREQ A AREQ A        AREQ A AREQ B AREQ A        AREQ A
    50134M001 DARR A DARW A DARW A DARW A DARW A DARW A DARW A DARW A DARW A DARW A
    50134M002                                    DARR A
    66010M001 DAVR A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
    92201M012 FAA1 A                                    FAA1 A               FAAA A
    40451M123 GODZ A        GODE A GODE A        GODE A GODE A GODE A GODE A GODE A
                                                 GODZ A
    40405S031 GOLD A        GOLD A GOLD A        GOL2 A GOLD A GOL2 A GOLD A GOLD A
                                                 GOLD A
    22306M002 IISC A IISC A IISC B IISC A IISC A IISC A IISC B IISC A IISC A IISC A
    12313M001               IRKT A IRKT A IRKM A IRKT A IRKT A IRKT A IRKM A IRKT A
    43005M002 KELY B        KELY B KELY B        KELY A KELY B KELY A KELY A KELY A
    10422M001 KIR0 A                      KIR0 A        KIR0 A        KR0G A KR0G A
    22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A
    30314M002 SUTH A        SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A SUTH A SUTH A
    43001M002 THU2 A        THU3 A THU3 A THU2 A THU2 A THU3 A THU2 A THU3 A THU2 A
                                          THU3 A                             THU3 A
    43001M003                                    THU3 A
    50107M004 YAR2 A YAR2 A YAR2 A YAR2 A        YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A
    50103M108               TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A
                                   TID1 A
    13407S012                      MADR A MADR A MADR A MADR A MADR A MADR A MADR A
                                                               MAD2 A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  OHI3 A  MIA3 A  MIA4 A  NDBC A  LKHU A  ADKS A  SG21 A  JCT1 A  ISPA A  USMX A
  P066 A  POTR A  DESC A  P473 A  P472 A  SAMO A  CNCL A  QUAR A  KARA A  PARK A
  HIL1 A  IRKM A  ADIS A  VAAS A  LAMP A
 
MISSING IERS DOMES NOS AT sio:
-----------------------------
  KULU A  SG21 A  CNCL A  KARA A
 
MISSING IERS DOMES NOS AT igs:
-----------------------------
  HIL1 A  LAMP A
 
MISSING IERS DOMES NOS AT IGS:
-----------------------------
  ANG1 A  AZCN A  AZCO A  KLPD A  LAMP A  LASC A  LEBA A

IERS DOMES NO    mit    ncl    igs    IGS
============= ====== ====== ====== ======
    13407S012 MADR A MADR A MADR A MADR A
              MAD2 A 
    43005M002 KELY A KELY B KELY A KELY A
    43001M002 THU2 A THU2 A THU3 A THU2 A
                     THU3 A        THU3 A
    40451M123 GODZ A GODE A GODE A GODE A
              GODE A 
    92201M012 FAA1 A               FAAA A
    50107M004 YAR2 A YAR2 A YAR1 A YAR1 A
    12313M001 IRKM A IRKT A IRKM A IRKT A
              IRKT A 
    10422M001 KIR0 A KIR0 A KR0G A KR0G A
 
MISSING IERS DOMES NOS AT mit:
-----------------------------
  KULU A  MIA3 A  MIA4 A  NDBC A  LKHU A  ADKS A  SG21 A  JCT1 A  USMX A  P066 A
  POTR A  DESC A  P473 A  P472 A  SAMO A  CNCL A  QUAR A  KARA A  HIL1 A  VAAS A

MISSING IERS DOMES NOS AT igs:
-----------------------------
  HIL1 A  LAMP A
 
MISSING IERS DOMES NOS AT IGS:
-----------------------------
  ANG1 A  AZCN A  AZCO A  KLPD A  LAMP A  LASC A  LEBA A