[IGSREPORT-91] Preliminary look at GPS Earth orientation

[Dennis]

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IGS Electronic Report     18-JAN-1993 17:00:06       Message Number 91
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>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
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Date:     15 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  -1.11 -1.68          0.77  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   192  -0.45  0.02  -3.16   0.90  0.72  1.20 
(ITRF91)     -48991.5

JPL          48794.5   164  -0.98  0.19          0.78  0.73 
             -48989.5

GFZ          48795.0   107  -2.40 -1.91          1.16  1.10
             -48925.5

ESOC         48794.5   189  -1.45 -0.35          1.42  1.79
             -48982.5

EMR          48838.5   113  -0.77  0.56          1.01  0.75
             -48996.5
                        58                0.68               1.30


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil