From Dennis Mon Dec 13 08:03:22 1993 From: Dennis (Dennis) Date: Mon, 13 Dec 1993 8:03:22 PST Subject: [IGSREPORT-0651] GPS Earth Orientation Message-ID: ****************************************************************************** IGS Electronic Report Mon Dec 13 8:03:22 PST 1993 Message Number 0651 ****************************************************************************** Author: Dennis McCarthy / USNO Subject: GPS Earth Orientation >From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 9 December 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 Scripps 48780.5 529 -1.83 -1.45 0.67 0.85 -49311.5 CODE(ITRF91) 48800.5 523 -0.70 -1.78 -4.73 0.79 0.90 1.74 -49322.5 JPL 48794.5 479 -0.79 -1.29 0.71 0.75 -49304.5 ESOC 48794.5 525 -1.02 -1.86 1.20 1.48 -49318.5 EMR 48830.5 450 -1.25 -0.97 0.71 0.79 -49325.5 320 0.05 0.83 GFZ 48997.5 326 -0.76 -0.84 0.41 0.40 -49318.5 NOAA 48988.5 320 -0.88 -1.68 1.11 1.34 -49325.5 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 49282.5 -0.50 1.16 0.42 0.71 -49311.5 CODE(ITRF91) 49293.5 -0.09 0.37 -3.18 0.44 0.57 0.14 -49322.5 JPL 49275.5 -0.31 -0.30 0.58 0.46 -49304.5 ESOC 49289.5 -0.40 0.36 0.54 0.47 -49318.5 EMR 49296.5 -0.25 -0.20 0.57 0.53 -49325.5 49279.5 0.69 0.83 -49325.5 GFZ 49289.5 -0.23 0.10 0.34 0.33 -49318.5 NOAA 49296.5 1.00 0.19 0.75 0.93 -49325.5 -- 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