From Dennis Thu May 19 10:05:49 1994 From: Dennis (Dennis) Date: Thu, 19 May 1994 10:05:49 PDT Subject: [IGSREPORT-0971] GPS Earth Orientation Message-ID: ****************************************************************************** IGS Electronic Report Thu May 19 10:05:49 PDT 1994 Message Number 0971 ****************************************************************************** Author: Dennis McCarthy / USNO Subject: GPS Earth Orientation >From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 19 May 1994 An updated look at Earth orientation data submitted to the IERS follows. Data reduced in the ITRF92 have been used where available. Means refer to the ITRF92 for those contributors who have reported estimates in the ITRF92 (CODE, ESOC, EMR, JPL, and GFZ). 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 Scripps 48780.5 697 -1.57 -1.54 0.79 0.85 -49479.5 CODE 48792.5 693 0.17 -1.13 -0.14 0.66 0.80 2.36 -49484.5 JPL 48794.5 654 0.03 -1.31 0.61 0.64 -49479.5 ESOC 48794.5 686 -0.22 -1.70 1.06 1.29 -49479.5 NRCan 48830.5 611 -0.02 -0.71 0.59 0.74 -49486.5 467 0.12 0.80 GFZ 48997.5 494 -0.38 -1.49 0.34 0.34 -49486.5 NOAA 48988.5 490 -0.52 -1.50 1.13 1.30 -49488.5 Plots of the residuals are available by FAX to anyone interested. Below is the same information as above provided for only the last thirty data points sent by each contributor. Contributor Data Span Mean Standard Deviation (NEOS-GPS) x y UT1-UTC x y UT1-UTC Scripps 49450.5 -0.22 -1.75 0.43 0.52 -49479.5 CODE 49455.5 0.18 -1.10 -3.80 0.37 0.31 0.16 -49484.5 JPL 49450.5 -0.07 -1.64 0.27 0.28 -49479.5 ESOC 49450.5 -0.29 -1.58 0.38 0.50 -49479.5 NRCan 49457.5 -0.20 -1.04 0.28 0.37 -49486.5 49455.5 1.04 0.21 -49486.5 GFZ 49457.5 -0.56 -1.53 0.32 0.23 -49486.5 NOAA 49459.5 0.16 -1.01 0.99 0.99 -49488.5 -- Dennis D. McCarthy dmc at maia.usno.navy.mil Chief Earth Orientation Parameters phone: (202) 653-0066 U.S. Naval Observatory fax: (202) 653-0587 Washington, DC 20392-5100