[IGSREPORT-26] Preliminary look at GPS Earth orientation

[Dennis]

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IGS Electronic Report      1-DEC-1992 16:25:02       Message Number 26
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>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
          -----------------------------------------

Date:     30 November 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  -1.90 -3.11          0.90  0.74  
             -48880.5

Scripps      48780.5   151  -1.17 -1.74          0.91  0.68
             -48932.5     

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   145  -0.51 -0.04  -2.93   0.99  0.92  1.29 
(ITRF91)    -48944.5

JPL          48794.5   123  -1.02  0.00          0.71  0.84 
             -48940.5

GFZ          48795.0   107  -2.44 -1.96          1.20  1.14
             -48925.5

ESOC         48794.5   154  -1.56 -0.21          1.44  1.87
             -48947.5

EMR          48838.5    74  -0.85  0.47          1.20  0.97
             -48946.5
                        27                0.50               0.66


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil