[IGSREPORT-2031] Subject
M
M
Fri Sep 22 10:05:16 PDT 1995
IGS Electronic Report Fri Sep 22 10:05:16 PDT 1995 Message Number 2031
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Author: M B Heflin
Subject: Subject: Wk 0815 JPL Type Two Analysis Center Comparison
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TYPE TWO ANALYSIS CENTER COMPARISON FROM JPL FOR GPS WEEK 815 AUG 20-26, 1995
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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 EMR, COD, JPL, and SIO. 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: The two sinex files from SIO were combined before comparison.
TABLE OF COMPARISON RESIDUALS (N E V in mm)
--------------------------------------------------------------------------------
emr esa gfz jpl ngs sio
+-----------+-----------+-----------+-----------+-----------+-----------+
cod | 8 9 10| | | 9 9 16| | 10 16 25|
20.0 | 25 | | | 34 | | 39 |
+-----------+-----------+-----------+-----------+-----------+-----------+
emr | | | 6 10 14| | 11 16 28|
5.0 | | | 22 | | 24 |
+-----------+-----------+-----------+-----------+-----------+
esa | | | | |
| | | | |
+-----------+-----------+-----------+-----------+
gfz | | | |
| | | |
+-----------+-----------+-----------+
jpl | | 13 14 32|
6.0 | | 33 |
+-----------+-----------+
ngs | |
| |
+-----------+
sio
1.0
-------------------------------------------------------------------------------
THREE SIGMA RESIDUALS AND FORMAL ERRORS (mm)
-------------------------------------------------------------------------------
PAIR SITE N E V SN SE SV
CODJPL: ALGO 11.8 -1.3 -26.3 3.9 5.9 10.3
CODSIO: MADR -22.0 -14.9 10.8 7.0 10.0 16.4
EMRSIO: MCM4 6.7 -7.7 121.2 16.4 17.0 26.3
JPLSIO: MCM4 7.4 -2.5 158.3 10.3 10.4 22.6
JPLSIO: PAMA 4.6 -146.1 51.1 11.6 37.8 50.3
JPLSIO: SANT 36.0 20.7 -10.2 10.2 15.1 25.0
-------------------------------------------------------------------------------
COD TO EMR TRANSFORMATION PARAMETERS
----------------------------------------
CHI^2 = .6540E+02
DOF = 65
CHI^2/DOF = 1.01
RX = .2277E-08 +- .1148E-08 rad
RY = .1883E-09 +- .9622E-09 rad
RZ = .1003E-09 +- .1152E-08 rad
TX = -.7832E-03 +- .5538E-02 m
TY = .2078E-01 +- .5670E-02 m
TZ = .2054E-02 +- .5035E-02 m
S = .1637E-09 +- .5892E-09 parts
----------------------------------------
COD TO JPL TRANSFORMATION PARAMETERS
----------------------------------------
CHI^2 = .6980E+02
DOF = 92
CHI^2/DOF = .76
RX = .1385E-07 +- .2620E-09 rad
RY = .1137E-07 +- .2515E-09 rad
RZ = -.6101E-07 +- .4573E-09 rad
TX = .2906E-01 +- .2330E-02 m
TY = .1748E-01 +- .2572E-02 m
TZ = -.1179E+00 +- .1919E-02 m
S = -.3347E-09 +- .5299E-09 parts
----------------------------------------
COD TO SIO TRANSFORMATION PARAMETERS
----------------------------------------
CHI^2 = .1142E+03
DOF = 95
CHI^2/DOF = 1.20
RX = .3718E-09 +- .3142E-09 rad
RY = .6213E-08 +- .2970E-09 rad
RZ = -.1347E-06 +- .5290E-09 rad
TX = -.2057E-01 +- .2415E-02 m
TY = .1225E+00 +- .2683E-02 m
TZ = -.4884E-01 +- .2357E-02 m
S = .1399E-08 +- .6348E-09 parts
----------------------------------------
EMR TO JPL TRANSFORMATION PARAMETERS
----------------------------------------
CHI^2 = .3421E+02
DOF = 59
CHI^2/DOF = .58
RX = .1119E-07 +- .1179E-08 rad
RY = .1101E-07 +- .1006E-08 rad
RZ = -.6142E-07 +- .1238E-08 rad
TX = .3169E-01 +- .6103E-02 m
TY = -.4893E-02 +- .6095E-02 m
TZ = -.1215E+00 +- .5372E-02 m
S = -.8517E-09 +- .6267E-09 parts
----------------------------------------
EMR TO SIO TRANSFORMATION PARAMETERS
----------------------------------------
CHI^2 = .7196E+02
DOF = 56
CHI^2/DOF = 1.28
RX = -.2146E-08 +- .1206E-08 rad
RY = .6129E-08 +- .1059E-08 rad
RZ = -.1355E-06 +- .1299E-08 rad
TX = -.1751E-01 +- .6381E-02 m
TY = .1012E+00 +- .6349E-02 m
TZ = -.5729E-01 +- .5554E-02 m
S = .1681E-08 +- .6858E-09 parts
----------------------------------------
JPL TO SIO TRANSFORMATION PARAMETERS
----------------------------------------
CHI^2 = .9626E+02
DOF = 80
CHI^2/DOF = 1.20
RX = -.1369E-07 +- .2175E-09 rad
RY = -.4911E-08 +- .2108E-09 rad
RZ = -.7448E-07 +- .5698E-09 rad
TX = -.4823E-01 +- .2758E-02 m
TY = .1079E+00 +- .2655E-02 m
TZ = .6689E-01 +- .1681E-02 m
S = .1706E-08 +- .4947E-09 parts
----------------------------------------
[Mailed From: mbh at cobra.jpl.nasa.gov]
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