[IGSREPORT-44] Preliminary look at GPS Earth orientation

[Dennis]

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IGS Electronic Report     15-DEC-1992 10:57:47       Message Number 44
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>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
          -----------------------------------------

Date:     14 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  -1.90 -3.09          0.83  0.63  
             -48880.5

Scripps      48780.5   157  -1.10 -1.69          0.79  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   145  -0.41  0.04  -2.92   0.90  0.77  1.28 
(ITRF91)    -48944.5

JPL          48794.5   134  -1.21  0.12          0.70  0.75 
             -48953.5

GFZ          48795.0   107  -2.39 -1.92          1.16  1.10
             -48925.5

ESOC         48794.5   168  -1.50 -0.24          1.44  1.80
             -48961.5

EMR          48838.5    78  -0.76  0.60          1.15  0.85
             -48953.5
                        30                0.46               0.65


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil