[IGSREPORT-165] Preliminary look at GPS Earth orientation

[Dennis McCarthy]

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IGS Electronic Report     10-MAR-1993 16:24:21       Message Number 165
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From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
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Date:     8 March 1993


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  -1.89 -3.11          0.82  0.63
             -48880.5

Scripps      48780.5   221  -1.56 -0.84          0.63  0.67
             -49038.5

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   243  -0.42 -0.11  -3.23   0.89  0.83  1.08
(ITRF91)     -49042.5

JPL          48794.5   206  -0.79  0.04          0.76  0.70
             -49031.5

GFZ          48795.0   107  -2.34 -1.99          1.13  1.12
             -48925.5

ESOC         48794.5   245  -1.10 -0.86          1.42  1.89
             -49038.5

EMR          48838.5   155  -0.94  0.34          1.01  0.73
             -49038.5
                        94                0.25               1.34


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc @ maia.usno.navy.mil