From:     Dennis McCarthy
Date: 5 APR 1993 15:45:14 
Subject: [IGSREPORT-200] Preliminary look at GPS Earth orientation 

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IGS Electronic Report      5-APR-1993 15:45:14       Message Number 200
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From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
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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   250  -1.56 -0.79          0.68  0.65
             -49066.5

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   271  -0.56 -0.30  -3.30   0.99  0.94  1.04
 (ITRF91)    -49070.5

JPL          48794.5   227  -0.81 -0.05          0.82  0.70
             -49052.5

GFZ          48795.0   107  -2.33 -1.99          1.13  1.12
             -48925.5

ESOC         48794.5   266  -1.19 -0.98          1.42  1.91
             -49059.5

EMR          48838.5   190  -1.09  0.20          1.05  0.72
             -49073.5
                       121                0.17               1.21

GFZ          48997.5    63   1.95 -1.66          0.64  0.44
(New Series) -49059.5

NOAA         48988.5    72  -1.18 -1.88          1.06  1.09
             -49071.5

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