[IGSREPORT-83] Preliminary look at GPS Earth orientation

[Dennis]

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IGS Electronic Report     11-JAN-1993 16:56:08       Message Number 83
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>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
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Date:     11 January 1992


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  -1.91 -3.09          0.82  0.63  
             -48880.5

Scripps      48780.5   157  -1.12 -1.68          0.78  0.55
             -48938.5     

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   186  -0.44  0.02  -3.16   0.91  0.74  1.22 
(ITRF91)     -48985.5

JPL          48794.5   157  -1.02  0.15          0.78  0.73 
             -48982.5

GFZ          48795.0   107  -2.40 -1.91          1.16  1.10
             -48925.5

ESOC         48794.5   175  -1.51 -0.33          1.44  1.85
             -48968.5

EMR          48838.5   106  -0.68  0.51          1.08  0.78
             -48989.5
                        52                0.30               0.66


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil