From:     Dennis McCarthy
Date: 20 APR 1993 08:56:06 
Subject: [IGSREPORT-225] GPS Earth orientation 

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IGS Electronic Report     20-APR-1993 08:56:06       Message Number 225
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From:     Dennis McCarthy
Subj:     GPS Earth orientation
-------------------------------

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   263  -1.57 -0.75          0.67  0.66
             -49080.5

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   282  -0.58 -0.34  -3.34   0.98  0.94  1.04
 (ITRF91)    -49081.5

JPL          48794.5   241  -0.79 -0.08          0.82  0.69
             -49066.5

GFZ          48795.0   107  -2.33 -1.99          1.13  1.12
             -48925.5

ESOC         48794.5   294  -1.11 -1.00          1.41  1.84
             -49087.5

EMR          48838.5   204  -1.09  0.17          1.03  0.72
             -49087.5
                       133                0.24               1.18

GFZ          48997.5    77   1.97 -1.70          0.63  0.45
(New Series) -49073.5

NOAA         48988.5    86  -1.22 -1.87          1.01  0.98
             -49086.5

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