Subject: [IGSREPORT-15919] Wk 1463 IGS SINEX Combination
From: "IGS SINEX" <[email-masked]>
To: [email-masked]
Cc: [email-masked], [email-masked]
Date: Wed, 6 Feb 2008 16:39:55 -0500

******************************************************************************
IGS Electronic Report   06 Feb 13:40:01 PST 2008      Message Number 15919
******************************************************************************

Author:  R. Ferland, M. Bourassa

===============================================================
 Combined AC solution for GPS week 1463 - 08/01/20 to 08/01/26
===============================================================

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)

igs08P1463.snx  Combined weekly solution. 
igs08P1463.erp  Daily Earth Rotation Parameters.
igs00p03.erp    Daily Earth Rotation Parameters since GPS week 860. 
IGS08P04.snx    Cumulative Combined solution. 
igs08P1463.sum  This file.
igs08P1463.itr  Residuals between the AC and the IGS05 for the RF stations. 
igs08P1463.res  Residuals between the AC and the Combined Weekly solution.
IGS08P04.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 = igs08P1463.snx
     IGS = IGS08P04.snx

     MIT = mit14637.snx
     mit = mit1463g.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:
             sio  GLSV
             esa  AREQ  LHAZ

     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            | 168 |  87 |        26.115 |         1.000 |        26.113 |
emr            |  63 |  45 |         4.819 |         1.000 |         4.819 |
esa            | 102 |  74 |         6.095 |         1.000 |         6.095 |
gfz            | 159 |  86 |        13.292 |         1.000 |        13.291 |
jpl            | 116 |  65 |         6.109 |         1.000 |         6.109 |
MIT            | 242 |  97 |         3.097 |         1.000 |         3.097 |
ngs            | 184 |  98 |        47.386 |         1.002 |        47.486 |
sio            | 153 |  86 |         3.061 |         1.000 |         3.061 |
mit            | 305 |  94 |         2.073 |         0.950 |         1.969 |
igs            | 270 |  99 |         1.484 |         0.999 |         1.483 |
---------------|-----|-----|---------------|---------------|---------------|

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         87 |    -0.9     -0.1     -0.3 |     3.9      3.1      9.0 |
emr         45 |    -1.3     -0.1      0.3 |     3.7      2.7      9.5 |
esa         74 |    -0.5      0.0      0.1 |     4.4      3.0     12.2 |
gfz         86 |    -0.6     -0.1      0.1 |     3.1      2.4      7.3 |
jpl         65 |     0.4      0.0      0.3 |     3.4      3.4      9.7 |
MIT         97 |     0.3      0.1     -0.2 |     3.0      2.5      8.2 |
ngs         98 |    -0.4      0.1      0.0 |     3.8      2.8      7.6 |
sio         86 |     0.5      0.1      0.0 |     3.6      2.7      7.6 |
mit         94 |    -0.4      0.0      0.2 |     3.2      2.4      6.8 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        162 |    -0.4     -0.2     -0.6 |     1.7      1.2      3.1 |
emr         61 |    -0.9     -0.1      0.6 |     2.0      1.3      4.8 |
esa        100 |     0.0     -0.4     -0.8 |     3.3      1.3      8.0 |
gfz        156 |    -0.1     -0.3     -0.5 |     1.0      1.0      2.9 |
jpl        114 |     1.2      0.4      0.2 |     1.3      2.0      4.9 |
MIT        203 |     0.8      0.1     -0.1 |     1.3      1.1      2.8 |
ngs        179 |    -0.4     -0.3     -0.3 |     2.0      2.4      4.2 |
sio        146 |     0.5     -0.1     -1.3 |     1.0      1.3      3.2 |
mit        263 |    -0.2     -0.1     -0.4 |     0.5      0.5      2.0 |
ITR         98 |     0.3     -0.2     -0.1 |     3.0      2.2      7.5 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        153 |    -0.7     -0.1     -0.4 |     2.6      2.3      5.3 |
emr         60 |    -1.4      0.0      0.3 |     2.7      2.2      6.9 |
esa         97 |    -0.6     -0.2     -0.4 |     3.2      2.4      9.9 |
gfz        152 |    -0.6     -0.4     -0.2 |     2.0      1.9      4.9 |
jpl        105 |     0.8      0.4      0.8 |     2.1      2.8      7.4 |
MIT        183 |     0.2      0.1      0.0 |     1.9      2.2      4.8 |
ngs        174 |    -0.7     -0.1     -0.1 |     2.6      3.1      5.9 |
sio        144 |     0.0     -0.2     -0.7 |     2.4      2.5      4.4 |
mit        230 |    -0.6     -0.1     -0.3 |     1.8      1.8      4.2 |
igs        228 |    -0.4      0.1      0.4 |     1.7      1.6      4.1 |
ITR        127 |    -0.3      0.0     -0.1 |     2.1      1.8      7.1 |
---------------|---------------------------|---------------------------|

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            |  -0.016    0.009   -0.007      0.0      0.5      0.0     0.17 |
emr            |  -0.021    0.050    0.004      1.8      9.6      0.1     0.27 |
esa            |   0.031   -0.062    0.062      6.5      9.3     -5.6     0.82 |
gfz            |  -0.006   -0.022    0.010      0.7      0.0     -0.2     0.06 |
jpl            |   0.017    0.009   -0.018     -1.4      6.2     14.3     0.43 |
MIT            |  -0.013    0.012   -0.002      0.6      6.6     -8.7     0.03 |
ngs            |  -0.045   -0.077    0.027      4.0     -2.3     -3.3    -0.69 |
sio            |   0.115   -0.001    0.000     -1.1      9.8     12.7     0.66 |
mit            |  -0.010    0.019   -0.002     -0.4      0.1      0.7    -0.00 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.18 |
---------------|---------------------------------------------------------------|

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            |   0.043    0.046    0.047      1.2      1.1      1.1     0.18 |
emr            |   0.058    0.062    0.065      1.6      1.6      1.5     0.24 |
esa            |   0.046    0.049    0.050      1.2      1.2      1.2     0.19 |
gfz            |   0.045    0.045    0.048      1.2      1.2      1.1     0.18 |
jpl            |   0.053    0.054    0.055      1.4      1.4      1.3     0.21 |
MIT            |   0.042    0.043    0.045      1.1      1.1      1.1     0.17 |
ngs            |   0.042    0.043    0.045      1.1      1.1      1.1     0.17 |
sio            |   0.043    0.046    0.048      1.2      1.1      1.1     0.18 |
mit            |   0.042    0.043    0.046      1.1      1.1      1.1     0.17 |
igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.46 |
---------------|---------------------------------------------------------------|

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

               |      X        Y        Z  |    s X      s Y      s Z  |
               |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
---------------|---------------------------|---------------------------|
igs            |     2.7      8.0     -4.7 |     2.5      2.4      3.6 |
---------------|---------------------------|---------------------------|

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            |     ---        ---       ---       ---       ---       --- |
emr            |     ---       -6.9      -0.9       6.3      -0.7     -15.7 |
esa            |     ---        ---       ---       ---       ---       --- |
gfz            |     ---       18.3       3.7       9.5      -1.2       0.8 |
jpl            |     ---        ---       1.8       2.3      -3.5       3.9 |
MIT            |     ---       -7.9       1.7     -11.9       1.8       8.8 |
ngs            |     ---        ---       ---       ---       ---       --- |
sio            |     ---       -3.7      -3.0       ---      -1.7       --- |
mit            |     ---        3.5      -2.6      -1.1      -1.3      -4.1 |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---        2.7       3.5       1.4      -3.7      -2.8 |
---------------|------------------------------------------------------------|

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

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---        ---       ---       ---       ---       --- |
emr            |     ---        5.6       3.3      11.3       2.6      11.5 |
esa            |     ---        ---       ---       ---       ---       --- |
gfz            |     ---        7.9       0.9       2.7       3.0       7.8 |
jpl            |     ---        ---       1.8      13.6       1.6       9.7 |
MIT            |     ---        1.9       1.7       5.3       3.4      14.8 |
ngs            |     ---        ---       ---       ---       ---       --- |
sio            |     ---        4.5       2.3       ---       3.1       --- |
mit            |     ---        4.5       2.2       9.4       3.2      11.1 |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       21.3       5.6      10.3       6.6       7.4 |
---------------|------------------------------------------------------------|

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       esa14637.snx        |MANA  A    2|   14.8     2.3    12.9|
                                         |            |                       |
ITRF_IGS05.snx       gfz14637.snx        |GUAM  A    4|  -10.6     2.7     0.4|
ITRF_IGS05.snx       gfz14637.snx        |HOLM  A    1|   10.7     4.7    -2.9|
ITRF_IGS05.snx       gfz14637.snx        |WUHN  A    4|   11.0    -8.3    15.5|
                                         |            |                       |
ITRF_IGS05.snx       MIT14637.snx        |HOLM  A    1|    9.7     5.2     0.7|
ITRF_IGS05.snx       MIT14637.snx        |WUHN  A    4|   12.6    -8.2    21.0|
                                         |            |                       |
ITRF_IGS05.snx       sio14637.snx        |TSKB  A    2|   -0.2    -1.5   -17.4|
                                         |            |                       |
ITRF_IGS05.snx       mit1463g.snx        |ISPA  A    1|   -1.8     1.0   -19.4|
ITRF_IGS05.snx       mit1463g.snx        |STJO  A    4|    0.2     6.2    16.0|
ITRF_IGS05.snx       mit1463g.snx        |THU3  A    1|   -1.6     1.5   -18.8|
ITRF_IGS05.snx       mit1463g.snx        |TSKB  A    2|   -2.0    -0.3   -14.1|
ITRF_IGS05.snx       mit1463g.snx        |WUHN  A    4|    1.3   -10.0    17.3|
                                         |            |                       |
IGS08P03.snx         cod14637.snx        |NTUS  A    4|  -15.2    -8.3    -6.0|
                                         |            |                       |
IGS08P03.snx         esa14637.snx        |NTUS  A    4|  -17.8   -11.6    -6.9|
                                         |            |                       |
IGS08P03.snx         gfz14637.snx        |NTUS  A    4|  -14.4    -8.8    -5.1|
                                         |            |                       |
IGS08P03.snx         mit1463g.snx        |NTUS  A    4|  -13.3    -8.6    -3.1|
                                         |            |                       |
IGS08P03.snx         igs08P1463.snx      |ALRT  A    1|   -0.9    -5.3     0.2|
IGS08P03.snx         igs08P1463.snx      |MEDI  A    2|    2.0     7.7    -5.9|
IGS08P03.snx         igs08P1463.snx      |NTUS  A    4|  -13.4   -10.4    -3.3|
IGS08P03.snx         igs08P1463.snx      |STJO  A    4|    0.8     4.9     6.9|
IGS08P03.snx         igs08P1463.snx      |TWTF  A    2|   -4.1    -6.7   -10.7|
-----------------------------------------|------------|-----------------------|

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 A AREQ B AREQ A AREQ A AREQ A
    50134M001 DARR A        DARR 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
    92201M012 FAA1 A                                    FAA1 A        FAAA A 
    40451M123 GODZ A        GODZ A GODE A        GODE A GODE A GODE A GODE A GODE A
                                                 GODZ A
    40405S031 GOLD A GOLD A GOLD A GOLD A        GOLD A GOLD A GOL2 A GOLD A GOLD A
                                                 GOL2 A
    12313M001                      IRKT A IRKM A IRKT A IRKT A IRKT A IRKT A IRKM A
    10422M001 KIR0 A                      KIR0 A        KIR0 A        KR0G A KR0G A
    43001M002 THU2 A        THU2 A THU3 A THU2 A THU2 A THU3 A THU2 A THU2 A THU3 A
                                                                      THU3 A 
    43001M003                                    THU3 A
    50107M004 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 MAD2 A MADR A MADR A
                                                               MADR A
 
MISSING IERS DOMES NOS AT cod:
-----------------------------
  JPLV A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  S041 A  OHI3 A  S031 A  TUCU A  S071 A  S061 A  MIA3 A  NDBC A  LKHU A  ADKS A
  SG21 A  JCT1 A  ISPA A  USMX A  P066 A  POTR A  P473 A  S101 A  S141 A  SAMO A
  S111 A  CNCL A  QUAR A  KARA A  PARK A  S021 A  S131 A  HIL1 A  XMIS A  IRKM A
  ADIS A  NRIF A  S121 A  VAAS A  LAMP A
 
MISSING IERS DOMES NOS AT sio:
-----------------------------
  SG21 A  CNCL A  KARA A
 
MISSING IERS DOMES NOS AT IGS:
-----------------------------
  ANG1 A  AZCN A  AZCO A  CASC A  ELAT A  KLPD A  LAMP A  LASC A  LEBA A
 
MISSING IERS DOMES NOS AT igs:
-----------------------------
  HIL1 A  LAMP A  NRIF A  TUCU A

IERS DOMES NO    mit    IGS    igs
============= ====== ====== ======
    13407S012 MADR A MADR A MADR A
              MAD2 A
    43001M002 THU2 A THU2 A THU3 A
                     THU3 A 
    40451M123 GODZ A GODE A GODE A
              GODE A
    92201M012 FAA1 A FAAA A 
    50107M004 YAR2 A YAR1 A YAR1 A
    12313M001 IRKM A IRKT A IRKM A
              IRKT A
    10422M001 KIR0 A KR0G A KR0G A
 
MISSING IERS DOMES NOS AT mit:
-----------------------------
  S041 A  S031 A  TUCU A  S071 A  S061 A  MIA3 A  NDBC A  LKHU A  ADKS A  SG21 A
  JCT1 A  USMX A  P066 A  POTR A  P473 A  JPLV A  S101 A  S141 A  SAMO A  S111 A
  CNCL A  QUAR A  KARA A  S021 A  S131 A  HIL1 A  ADIS A  NRIF A  S121 A  VAAS A

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