From:  Dennis McCarthy
Date: 8 MAY 1993 14:37:05 
Subject: [IGSREPORT-257] Prel. look at GPS Earth orientation 

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IGS Electronic Report      8-MAY-1993 14:37:05       Message Number 257
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From:  Dennis McCarthy
Subj:  Prel. look at 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   284  -1.57 -0.70          0.59  0.66
             -49101.5     

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   306  -0.62 -0.42  -3.41   0.87  0.96  1.03 
 (ITRF91)    -49105.5

JPL          48794.5   262  -0.78 -0.09          0.70  0.66 
             -49066.5

GFZ          48795.0   107  -2.33 -1.99          1.13  1.12
             -48925.5

ESOC         48794.5   301  -1.11 -0.99          1.41  1.80
             -49094.5

EMR          48830.5   226  -1.06  0.45          0.77  0.91
             -49101.5
                       166                0.11               1.02

GFZ          48997.5    98   1.83 -1.51          0.74  0.56
(New Series) -49094.5

NOAA         48988.5   107  -1.25 -1.78          0.84  1.06
             -49108.5

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