[IGSREPORT-75] Preliminary look at GPS Earth orientation

[Dennis]

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IGS Electronic Report      5-JAN-1993 16:58:00       Message Number 75
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>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
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Date:     5 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 -1.69          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   179  -0.44  0.02  -3.13   0.93  0.74  1.24 
(ITRF91)     -48978.5

JPL          48794.5   150  -1.07  0.12          0.76  0.71 
             -48975.5

GFZ          48795.0   107  -2.40 -1.91          1.16  1.10
             -48925.5

ESOC         48794.5   175  -1.51 -0.33          1.44  1.84
             -48968.5

EMR          48838.5    99  -0.77  0.52          1.04  0.79
             -48982.5
                        46                0.23               0.68


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil