Subject: [IGSREPORT-12048] Wk 1299 IGS SINEX Combination
From: Martin Bourassa <[email-masked]>
To: [email-masked] (IGS Analysis Reports)
Cc: [email-masked] (Gerd Gendt), [email-masked] (Thomas Nischan)
Date: Thu, 16 Dec 2004 23:20:36 EST

******************************************************************************
IGS Electronic Report   16 Dec 20:20:42 PST 2004      Message Number 12048
******************************************************************************

Author:  R. Ferland , D. Hutchison

===================================================================
 Combined AC  solution for GPS week 1299 -  04/11/28 to 04/12/04
===================================================================

1) Contacts:
============
e-mail: [email-masked]
Tel:    (613)995-4002 (Remi Ferland)
Fax:    (613)995-3215

2) Products:
============
All products are available at cddisa.gsfc.nasa.gov and at garner.ucsd.edu

igs04P1299.snx  Combined weekly solution. 
igs04P1299.erp  Daily Earth Rotation Parameters.
igs00p02.erp    Daily Earth Rotation Parameters since GPS week 1013.
IGS04P48.snx    Cumulative Combined solution. 
igs04P1299.sum  This file.
igs04P1299.itr  Residuals between the AC and the IGb00 for the RF stations. 
igs04P1299.res  Residuals between the AC and the Combined Weekly solution.
IGS04P48.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 = igs04P1299.snx
     IGS = IGS04P48.snx

     MIT = mit12997.snx
     mit = mit1299g.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).

     New stations in the cumulative solution IGS04P48.snx
                  KOK1 A ---- MTBG 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            | 164 |  76 |        28.259 |         1.000 |        28.249 |
emr            |  43 |  34 |         4.519 |         1.000 |         4.518 |
esa            |  71 |  58 |        10.947 |         1.000 |        10.946 |
gfz            | 175 |  80 |        10.378 |         1.000 |        10.375 |
jpl            | 110 |  51 |         5.470 |         1.000 |         5.468 |
MIT            | 145 |  68 |         2.797 |         1.000 |         2.797 |
ngs            | 127 |  71 |        25.121 |         1.000 |        25.115 |
sio            | 172 |  82 |         2.769 |         1.000 |         2.768 |
mit            | 262 |  81 |         1.107 |         1.000 |         1.107 |
ncl            | 162 |  84 |         3.139 |         1.000 |         3.138 |
igs            | 242 |  87 |         1.479 |         1.001 |         1.481 |
---------------|-----|-----|---------------|---------------|---------------|

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         76 |     1.0     -0.0     -0.6 |     3.3      2.9     10.4 |
emr         34 |    -1.3      0.1      0.3 |     2.9      2.3      9.3 |
esa         58 |    -1.6      0.1      0.8 |     4.8      3.5     11.6 |
gfz         80 |    -0.3     -0.0     -0.3 |     2.9      2.6     10.8 |
jpl         51 |    -0.6      0.1     -0.0 |     3.0      3.1      9.9 |
MIT         67 |     0.4      0.1      0.6 |     3.1      2.5      9.8 |
ngs         71 |    -1.7     -0.4      0.4 |     4.8      5.5     10.8 |
sio         82 |     0.5      0.1     -0.3 |     3.6      3.7      7.5 |
mit         81 |     0.7      0.1     -0.0 |     2.8      2.3      8.3 |
ncl         83 |     0.6     -0.0      0.2 |     2.7      2.6      8.0 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        161 |     0.3      0.1     -1.0 |     1.6      1.2      4.9 |
emr         43 |    -1.9     -0.6     -0.4 |     1.5      1.4      6.0 |
esa         70 |    -2.1     -0.2      2.5 |     2.4      2.2     13.6 |
gfz        171 |    -1.1     -0.3     -0.1 |     1.3      1.4      4.3 |
jpl        108 |    -1.3     -0.5      0.6 |     1.8      2.1      7.8 |
MIT        131 |     0.1     -0.2     -0.4 |     1.5      1.8      5.1 |
ngs        124 |    -2.2     -0.9     -0.5 |     2.6      4.3      6.0 |
sio        159 |    -0.0      0.1      0.4 |     1.7      2.0      5.9 |
mit        230 |     0.3     -0.2     -0.5 |     0.8      0.8      2.7 |
ncl        159 |     0.1     -0.2      0.5 |     0.9      0.7      2.5 |
ITR         86 |    -0.5      0.0     -0.8 |     3.1      2.6      8.8 |
---------------|---------------------------|---------------------------|

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

Solution       |  Weighted Average (mm)    |          STD (mm)         |
               |      N        E        U  |      N        E        U  |
---------------|---------------------------|---------------------------|
cod        133 |     1.1      0.4     -1.3 |     3.0      2.4      8.3 |
emr         41 |    -1.6     -0.4      0.6 |     2.1      2.1      8.7 |
esa         68 |    -1.9     -0.2      1.6 |     4.3      3.4     12.7 |
gfz        156 |    -0.6      0.0     -0.2 |     2.2      2.1      8.2 |
jpl         91 |    -0.8     -0.2      1.2 |     2.7      2.9      9.6 |
MIT        114 |     0.5      0.1     -0.4 |     2.4      2.5      7.3 |
ngs        115 |    -1.6     -0.6     -0.7 |     3.9      5.0      9.3 |
sio        146 |     0.5      0.3      0.1 |     3.1      3.2      7.6 |
mit        175 |     0.7      0.2     -0.5 |     2.0      2.0      6.4 |
ncl        146 |     0.6      0.1      0.2 |     2.4      2.0      6.0 |
igs        182 |     0.4      0.2      0.0 |     2.1      1.9      6.2 |
ITR         93 |    -0.3      0.0     -0.4 |     1.2      1.1      3.6 |
---------------|---------------------------|---------------------------|

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            |  -0.008   -0.003   -0.027     14.8     12.3    -20.8     3.23 |
emr            |  -0.007   -0.008    0.010      4.7      9.7    -27.8     4.25 |
esa            |  -0.013   -0.015    0.010     -1.4     14.4     -7.1     2.62 |
gfz            |   0.048   -0.059    0.046      0.0      0.9     -5.4     2.27 |
jpl            |   0.121   -0.060    0.116      1.0     18.9      3.3     1.36 |
MIT            |   0.230   -0.064   -0.004      4.6     10.4      3.0     4.60 |
ngs            |   0.113   -0.029    0.027     -1.4     14.9     -5.2     3.79 |
sio            |  -0.057    0.040   -0.014     14.5      8.5     48.9     2.94 |
mit            |  -0.006   -0.001   -0.009     -1.5     -0.5     -2.7     3.57 |
ncl            |   0.029   -0.044   -0.019      1.7      1.7     -6.3     2.86 |
---------------|---------------------------------------------------------------|

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            |   0.045    0.047    0.051      1.2      1.2      1.2     0.18 |
emr            |   0.065    0.068    0.079      1.7      1.7      1.7     0.27 |
esa            |   0.050    0.052    0.057      1.3      1.3      1.3     0.21 |
gfz            |   0.044    0.045    0.050      1.2      1.1      1.1     0.18 |
jpl            |   0.054    0.056    0.059      1.4      1.4      1.4     0.22 |
MIT            |   0.047    0.049    0.054      1.2      1.2      1.2     0.19 |
ngs            |   0.046    0.048    0.052      1.2      1.2      1.2     0.19 |
sio            |   0.044    0.045    0.049      1.2      1.1      1.1     0.18 |
mit            |   0.044    0.045    0.051      1.2      1.1      1.1     0.18 |
ncl            |   0.043    0.044    0.049      1.1      1.1      1.1     0.18 |
---------------|---------------------------------------------------------------|

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

               |      X        Y        Z  |    s X      s Y      s Z  |
               |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
---------------|---------------------------|---------------------------|
igs            |     6.5     11.9     -6.2 |     3.4      3.6      4.8 |
---------------|---------------------------|---------------------------|

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            |     ---       -3.2       0.1       ---      -1.4       --- |
emr            |     ---       10.0      -2.6      16.3      -1.7      -3.7 |
esa            |     ---       18.4       8.1       ---      -0.3       --- |
gfz            |     ---       -2.3       4.7      -5.9       3.0       5.8 |
jpl            |     ---       18.0       3.3       2.7       0.2       7.4 |
MIT            |     ---        2.1       4.2       1.2       0.9       1.2 |
ngs            |     ---        1.2      -6.7       0.4      -1.5      19.9 |
sio            |     ---       -9.5       0.5      -1.8      -0.2       0.1 |
mit            |     ---       14.1       3.1       1.4       0.8       0.5 |
ncl            |     ---        5.6      14.1       ---      -0.2       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---       19.1       2.4       1.9      27.5      -0.2 |
---------------|------------------------------------------------------------|

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

Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
               |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
---------------|------------------------------------------------------------|
cod            |     ---        4.2       1.1       ---       1.2       --- |
emr            |     ---       12.7       6.8       6.5       4.5      13.4 |
esa            |     ---       19.7       4.1       ---       3.6       --- |
gfz            |     ---        6.2       1.1       8.6       3.3       9.0 |
jpl            |     ---       12.9       1.8       9.1       1.7       9.0 |
MIT            |     ---        6.2       4.1       4.4       1.2       6.3 |
ngs            |     ---       11.9       7.4      36.9       4.9      22.5 |
sio            |     ---        6.5       1.7       6.6       2.5       4.7 |
mit            |     ---        7.5       4.0       6.4       1.6       7.1 |
ncl            |     ---        1.7       1.0       ---       0.8       --- |
ITR            |     ---        ---       ---       ---       ---       --- |
BuA            |     ---        9.5       4.4      11.4       4.9       9.1 |
---------------|------------------------------------------------------------|

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    cod12997.snx        |YAKT  A ----|   22.6   -21.5     1.1|
                                         |            |                       |
IGS03P33_RS99.snx    gfz12997.snx        |YAKT  A ----|   22.6   -21.0    -5.8|
                                         |            |                       |
IGS03P33_RS99.snx    gfz12997.snx        |IISC  A ----|   -5.4   -10.4    -1.9|
                                         |            |                       |
IGS03P33_RS99.snx    jpl12997.snx        |YAKT  A ----|   15.1   -18.0     2.3|
                                         |            |                       |
IGS03P33_RS99.snx    ngs12997.snx        |YAKT  A ----|   31.4   -32.7     5.8|
                                         |            |                       |
IGS03P33_RS99.snx    mit1299g.snx        |YAKT  A ----|   29.8   -23.6     3.6|
                                         |            |                       |
IGS03P33_RS99.snx    mit1299g.snx        |IISC  A ----|   -2.3   -10.7    -4.5|
                                         |            |                       |
IGS04P47.snx         gfz12997.snx        |RESO  A ----|   14.3    -1.4    -3.7|
                                         |            |                       |
IGS04P47.snx         jpl12997.snx        |ASPA  A ----|   -0.7     3.5   -47.0|
                                         |            |                       |
IGS04P47.snx         MIT12997.snx        |YAKT  A ----|   34.2   -28.8   -18.5|
                                         |            |                       |
IGS04P47.snx         MIT12997.snx        |TVST  A ----|  -18.1    -0.7   -37.4|
                                         |            |                       |
IGS04P47.snx         mit1299g.snx        |RESO  A ----|   14.3     0.7    -4.3|
IGS04P47.snx         mit1299g.snx        |USUD  A ----|   11.5    -0.5     1.1|
                                         |            |                       |
IGS04P47.snx         ncl1299g.snx        |YAKT  A ----|   26.2   -24.1   -10.4|
                                         |            |                       |
IGS04P47.snx         igs04P1299.snx      |MAG0  A ----|    9.3    10.7   -11.9|
IGS04P47.snx         igs04P1299.snx      |RESO  A ----|   14.2    -0.1    -0.9|
IGS04P47.snx         igs04P1299.snx      |USUD  A ----|   10.9     0.2     0.7|
-----------------------------------------|------------|-----------------------|

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

IERS DOMES NO    MIT    cod    emr    esa    gfz    jpl    ngs    sio    IGS    igs
============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ======
    43001M003 THU3 A 
    43001M002        THU3 A THU3 A THU3 A THU3 A        THU3 A THU2 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
    40405S038 GOL2 A 
    40405S031        GOLD A        GOLD A GOLD A        GOLD A GOL2 A GOLD A GOLD A
    50103M108 TIDB A TIDB A TIDB A TIDB A TIDB A        TIDB A TID2 A TIDB A TIDB A
                                          TID1 A               TIDB A
                                          TID2 A 
    50134M001 DARW A DARR A        DARW A DARW A DARR 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
    66010M001 DAV1 A DAVR A        DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A
    22306M002 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
    10023M001                             LROC A                      LROC A LROC A
 
MISSING IERS DOMES NOS AT MIT:
-----------------------------
  HLFX A  PALM A  PUR3 A  MIA3 A  KYW1 A  MCD1 A  ARP3 A  GUAX A  UPO1 A  OUSD A
  MTJO A  HORN A  CNCL A  QUAR A  TVST A  KAYT A  SAMP A  MAR6 A  IENG A
 
MISSING IERS DOMES NOS AT gfz:
-----------------------------
  BISH A  PALM A
 
MISSING IERS DOMES NOS AT ngs:
-----------------------------
  CHUM A
 
MISSING IERS DOMES NOS AT sio:
-----------------------------
  KULU A  SG21 A  DOAR A  OUSD A  CNCL A  MERS A  CAVA A  SFEL A  VOLT A  BRAS A

IERS DOMES NO    mit    ncl    IGS    igs
============= ====== ====== ====== ======
    43001M003 THU3 A 
    43001M002 THU2 A THU3 A THU3 A THU3 A
    40451M123 GODZ A GODE A GODE A GODE A
              GODE 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
    10422M001 KIR0 A               KR0G A
    30314M002 SUTH A SUTH A SUTH A SUTH A
 
MISSING IERS DOMES NOS AT mit:
-----------------------------
  BISH A
--