Subject: [IGSREPORT-2147] Subject
From: M B Heflin
Date: Thu, 9 Nov 1995 16:52:27 PST

IGS Electronic Report    Thu Nov  9 16:52:27 PST 1995      Message Number 2147
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Author: M B Heflin 
Subject: Subject: Wk 0823 JPL Type Two Analysis Center Comparison

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TYPE TWO ANALYSIS CENTER COMPARISON FROM JPL FOR GPS WEEK 823 OCT 15 - 21 1995
******************************************************************************

M B Heflin, J F Zumberge, D C Jefferson, M M Watkins, F H Webb

all at the Jet Propulsion Laboratory, California Institute of Technology,
Pasadena, CA  91109.

Solutions in SINEX format were obtained from COD, EMR, GFZ, JPL, and NGS.
Each center was compared to each other center by estimating a 7-parameter
Helmert transformation to minimize the least-squares coordinate residuals.

The following table summarizes comparison results.  The North, East, and
Vertical WRMS values are given in mm for each pair.  The number of common sites
is given directly underneath the values for WRMS.  The number underneath each
center's name is the scale factor applied to the formal errors from that
center.  A list of all residuals significant at the level of three sigma or
higher is given after the summary.  These residuals were removed from the final
comparisons.  Transformation parameters for each pair are given at the end of
the report.

Remarks:  A weekly solution from NGS was contstructed by combining their daily
submissions.

TABLE OF COMPARISON RESIDUALS (N E V in mm)
-------------------------------------------------------------------------------
            emr         esa         gfz         jpl         ngs         sio
      +-----------+-----------+-----------+-----------+-----------+-----------+
 cod  |  6   8  11|           |  6   9   9|  7   7  16| 11  12  22|           |
10.0  |     22    |           |     35    |     33    |     37    |           |
      +-----------+-----------+-----------+-----------+-----------+-----------+
            emr   |           |  7  12  15|  5   8   9|  7  12  16|           |
            4.0   |           |     22    |     19    |     22    |           |
                  +-----------+-----------+-----------+-----------+-----------+
                        esa   |           |           |           |           |
                              |           |           |           |           |
                              +-----------+-----------+-----------+-----------+
                                    gfz   |  6   9  17| 11  15  22|           |
                                    5.0   |     29    |     34    |           |
                                          +-----------+-----------+-----------+
                                                jpl   | 11  15  19|           |
                                                4.0   |     28    |           |
                                                      +-----------+-----------+
                                                            ngs   |           |
                                                           20.0   |           |
                                                                  +-----------+
                                                                        sio
                                                                           
-------------------------------------------------------------------------------

THREE SIGMA RESIDUALS AND FORMAL ERRORS (mm)
-------------------------------------------------------------------------------
PAIR     SITE     N      E      V        SN     SE     SV
CODJPL   KIT3   15.8    3.4   -7.6      4.5    8.5   16.3
CODNGS   MAC1    5.2  -64.2   15.3     13.3   20.2   25.3
CODNGS   MCM4   21.3  -77.6  -20.3     19.2   23.6   27.4
CODNGS   LPGS   35.0  -22.7  162.6     21.8   28.4   35.7
EMRJPL   HART    6.4    8.3   76.2      6.6   13.3   23.6
GFZJPL   WETT    3.6  -18.0   -5.9      3.5    5.9   13.6
GFZNGS   LHAS  -11.0   -4.1  -70.4      9.4   14.1   21.8
GFZNGS   IRKT   -5.7     .3   97.1      9.5   11.6   18.6
GFZNGS   LPGS   40.0   -1.5  163.0     21.2   28.1   35.4
GFZNGS   CAS1   47.5   12.9   28.0     15.7   21.5   24.0
GFZNGS   KERG    5.3   63.6   49.5     14.6   19.4   25.4
JPLNGS   IRKT   -8.3   -5.1   56.3      9.2   11.2   16.1
JPLNGS   MCM4   10.1  -71.0   -4.4     18.5   23.0   23.9
-------------------------------------------------------------------------------

COD TO EMR TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .5359E+02
 DOF        =          59
 CHI^2/DOF  =         .91
 RX =  -.4445E-07  +-   .1994E-09  rad
 RY =   .2940E-07  +-   .2081E-09  rad
 RZ =  -.6546E-06  +-   .2388E-09  rad
 TX =  -.1140E-01  +-   .1750E-02  m
 TY =   .1387E+00  +-   .1703E-02  m
 TZ =   .2239E-02  +-   .2042E-02  m
 S  =   .1787E-08  +-   .4580E-09  parts
----------------------------------------

COD TO GFZ TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .9701E+02
 DOF        =          98
 CHI^2/DOF  =         .99
 RX =  -.6034E-07  +-   .1425E-09  rad
 RY =   .3284E-07  +-   .1432E-09  rad
 RZ =  -.6842E-06  +-   .1986E-09  rad
 TX =   .9245E-01  +-   .1402E-02  m
 TY =   .3763E-01  +-   .1517E-02  m
 TZ =   .6253E-01  +-   .1661E-02  m
 S  =   .2878E-09  +-   .3754E-09  parts
----------------------------------------

COD TO JPL TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .8135E+02
 DOF        =          92
 CHI^2/DOF  =         .88
 RX =  -.5485E-07  +-   .1138E-09  rad
 RY =   .4461E-07  +-   .1121E-09  rad
 RZ =  -.7437E-06  +-   .1523E-09  rad
 TX =   .2701E-02  +-   .1173E-02  m
 TY =   .9929E-02  +-   .1277E-02  m
 TZ =  -.3291E-01  +-   .1373E-02  m
 S  =   .7725E-09  +-   .3187E-09  parts
----------------------------------------

COD TO NGS TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .1168E+03
 DOF        =         104
 CHI^2/DOF  =        1.12
 RX =   .1094E-05  +-   .1378E-09  rad
 RY =   .6320E-07  +-   .1508E-09  rad
 RZ =   .1327E-06  +-   .1529E-09  rad
 TX =   .8521E-02  +-   .1156E-02  m
 TY =   .1808E+00  +-   .1233E-02  m
 TZ =   .2038E+00  +-   .1395E-02  m
 S  =   .5956E-08  +-   .2963E-09  parts
----------------------------------------

EMR TO GFZ TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .6084E+02
 DOF        =          59
 CHI^2/DOF  =        1.03
 RX =  -.1594E-07  +-   .1792E-09  rad
 RY =   .3755E-08  +-   .2018E-09  rad
 RZ =  -.2943E-07  +-   .2665E-09  rad
 TX =   .1023E+00  +-   .1841E-02  m
 TY =  -.1008E+00  +-   .1798E-02  m
 TZ =   .5909E-01  +-   .1826E-02  m
 S  =  -.1366E-08  +-   .4450E-09  parts
----------------------------------------

EMR TO JPL TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .4360E+02
 DOF        =          50
 CHI^2/DOF  =         .87
 RX =  -.1083E-07  +-   .1852E-09  rad
 RY =   .1560E-07  +-   .2059E-09  rad
 RZ =  -.8904E-07  +-   .2382E-09  rad
 TX =   .1300E-01  +-   .1627E-02  m
 TY =  -.1292E+00  +-   .1698E-02  m
 TZ =  -.3516E-01  +-   .1847E-02  m
 S  =  -.1310E-08  +-   .4042E-09  parts
----------------------------------------

EMR TO NGS TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .4769E+02
 DOF        =          59
 CHI^2/DOF  =         .81
 RX =   .1139E-05  +-   .2170E-09  rad
 RY =   .3406E-07  +-   .2454E-09  rad
 RZ =   .7875E-06  +-   .3820E-09  rad
 TX =   .1681E-01  +-   .1826E-02  m
 TY =   .4227E-01  +-   .1975E-02  m
 TZ =   .2039E+00  +-   .1599E-02  m
 S  =   .3856E-08  +-   .3761E-09  parts
----------------------------------------

GFZ TO JPL TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .7406E+02
 DOF        =          80
 CHI^2/DOF  =         .93
 RX =   .5457E-08  +-   .1391E-09  rad
 RY =   .1165E-07  +-   .1451E-09  rad
 RZ =  -.5929E-07  +-   .1654E-09  rad
 TX =  -.8775E-01  +-   .1227E-02  m
 TY =  -.2631E-01  +-   .1347E-02  m
 TZ =  -.9525E-01  +-   .1592E-02  m
 S  =   .3853E-09  +-   .3650E-09  parts
----------------------------------------

GFZ TO NGS TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .1090E+03
 DOF        =          95
 CHI^2/DOF  =        1.15
 RX =   .1154E-05  +-   .1342E-09  rad
 RY =   .3055E-07  +-   .1507E-09  rad
 RZ =   .8168E-06  +-   .2204E-09  rad
 TX =  -.8363E-01  +-   .1284E-02  m
 TY =   .1441E+00  +-   .1508E-02  m
 TZ =   .1438E+00  +-   .1269E-02  m
 S  =   .5345E-08  +-   .3180E-09  parts
----------------------------------------

JPL TO NGS TRANSFORMATION PARAMETERS
----------------------------------------
 CHI^2      =   .9227E+02
 DOF        =          77
 CHI^2/DOF  =        1.20
 RX =   .1149E-05  +-   .1675E-09  rad
 RY =   .1851E-07  +-   .2025E-09  rad
 RZ =   .8761E-06  +-   .1871E-09  rad
 TX =   .5723E-02  +-   .1374E-02  m
 TY =   .1691E+00  +-   .1487E-02  m
 TZ =   .2377E+00  +-   .1571E-02  m
 S  =   .5212E-08  +-   .3256E-09  parts
----------------------------------------

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