From:     Dennis McCarthy
Date: 22 MAR 1993 17:03:41 
Subject: [IGSREPORT-182] Preliminary look at GPS Earth orientation 

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IGS Electronic Report     22-MAR-1993 17:03:41       Message Number 182
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From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
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Date:     22 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   236  -1.56 -0.81          0.65  0.67
             -49052.5

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   257  -0.51 -0.19  -3.26   0.95  0.89  1.06
 (ITRF91)    -49056.5

JPL          48794.5   220  -0.79  0.01          0.82  0.74
             -49045.5

GFZ          48795.0   107  -2.33 -1.99          1.13  1.12
             -48925.5

ESOC         48794.5   259  -1.17 -0.89          1.42  1.85
             -49052.5

EMR          48838.5   176  -1.06  0.32          1.07  0.74
             -49059.5
                       109                0.23               1.32

GFZ          48997.5    63   1.89 -1.48          0.57  0.58
(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