[IGSREPORT-38] Preliminary look at GPS Earth orientation

[Dennis]

***********************************************************************
IGS Electronic Report      9-DEC-1992 15:28:44       Message Number 38
***********************************************************************
 

>From:     Dennis McCarthy
Subject:  Preliminary look at GPS Earth orientation
          -----------------------------------------

Date:     7 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  -1.93 -3.09          0.82  0.63  
             -48880.5

Scripps      48780.5   157  -1.18 -1.73          0.82  0.57
             -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  -0.51 -0.01  -2.92   0.93  0.81  1.28 
(ITRF91)    -48944.5

JPL          48794.5   129  -1.34  0.08          0.63  0.73 
             -48946.5

GFZ          48795.0   107  -2.45 -1.94          1.17  1.10
             -48925.5

ESOC         48794.5   154  -1.60 -0.18          1.42  1.85
             -48947.5

EMR          48838.5    78  -0.80  0.55          1.26  0.86
             -48953.5
                        30                0.47               0.64


Plots are available by FAX to anyone interested.

Regards,

Dennis McCarthy
  dmc at maia.usno.navy.mil