[IGSREPORT-66] Preliminary look at GPS Earth orientation

[Dennis]

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IGS Electronic Report     29-DEC-1992 17:32:18       Message Number 66
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>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
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Date:     28 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  -1.12 -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   173  -0.43  0.03  -3.11   0.94  0.75  1.25 
(ITRF91)    -48972.5

JPL          48794.5   143  -1.09  0.12          0.77  0.73 
             -48968.5

GFZ          48795.0   107  -2.40 -1.92          1.16  1.10
             -48925.5

ESOC         48794.5   175  -1.51 -0.33          1.44  1.84
             -48968.5

EMR          48838.5    92  -0.73  0.63          1.03  0.83
             -48975.5
                        40                0.25               0.73


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil