[IGSREPORT-157] Preliminary look at GPS Earth orientation

[Dennis]

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IGS Electronic Report      2-MAR-1993 09:54:30       Message Number 157
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>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
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Date:     1 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   215  -1.59 -0.89          0.66  0.60
             -49031.5

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   237  -0.44 -0.09  -3.23   0.92  0.84  1.09
(ITRF91)     -49036.5

JPL          48794.5   199  -0.79  0.07          0.79  0.70
             -49024.5

GFZ          48795.0   107  -2.33 -1.99          1.13  1.12
             -48925.5

ESOC         48794.5   245  -1.11 -0.85          1.42  1.88
             -49038.5

EMR          48838.5   155  -0.94  0.36          1.06  0.75
             -49038.5
                        94                0.25               1.34


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil