[IGSREPORT-58] Preliminary look at GPS Earth orientation

[Dennis]

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IGS Electronic Report     22-DEC-1992 11:15:59       Message Number 58
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>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
          -----------------------------------------


Date:     21 December 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  -1.11 -1.69          0.77  0.55
             -48938.5     

U. of Berne  48792.5     8  -0.89  1.21  -0.28   1.51  1.88  0.13 
 (ITRF90)    -48799.5

U. of Berne  48800.5   164  -0.38  0.01  -3.07   0.95  0.79  1.27 
(ITRF91)    -48963.5

JPL          48794.5   137  -1.15  0.10          0.71  0.74 
             -48958.5

GFZ          48795.0   107  -2.40 -1.92          1.16  1.10
             -48925.5

ESOC         48794.5   175  -1.39 -0.35          1.52  1.87
             -48968.5

EMR          48838.5    85  -0.57  0.56          1.22  0.81
             -48968.5
                        35                0.27               0.74


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil