From:     Dennis McCarthy
Date: 30 MAR 1993 09:54:19 
Subject: [IGSREPORT-191] Preliminary look at GPS Earth orientation 

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IGS Electronic Report     30-MAR-1993 09:54:19       Message Number 191
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From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation

Date:     29 March 1993


An updated look at Earth orientation data submitted to the IERS
follows.  Units are milliseconds of arc for x and y, and
milliseconds of time for UT1-UTC.


Contributor Data Span Points       Mean          Standard Deviation
                                (NEOS-GPS)
                              x     y   UT1-UTC   x     y   UT1-UTC
U. of Texas  48794.5    76  -1.89 -3.11          0.82  0.63
             -48880.5

Scripps      48780.5   243  -1.59 -0.82          0.63  0.63
             -49059.5

U. of Berne  48792.5     8  -0.89  1.21  -0.28   1.52  1.88  0.13
 (ITRF90)    -48799.5

U. of Berne  48800.5   267  -0.57 -0.30  -3.28   0.93  0.95  1.06
 (ITRF91)    -49066.5

JPL          48794.5   227  -0.84 -0.05          0.75  0.69
             -49052.5

GFZ          48795.0   107  -2.33 -1.99          1.13  1.12
             -48925.5

ESOC         48794.5   266  -1.21 -0.98          1.39  1.92
             -49059.5

EMR          48838.5   183  -1.15  0.20          1.03  0.73
             -49066.5
                       115                0.23               1.23

GFZ          48997.5    63   1.89 -1.70          0.45  0.44
(New Series) -49059.5


Plots of the residuals of the most recent 100 days of data are
available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc@maia.usno.navy.mil