From Dennis Fri Jan 7 05:16:38 1994 From: Dennis (Dennis) Date: Fri, 7 Jan 1994 5:16:38 PST Subject: [IGSREPORT-0695] GPS Earth Orientation Message-ID: ****************************************************************************** IGS Electronic Report Fri Jan 7 5:16:38 PST 1994 Message Number 0695 ****************************************************************************** Author: Dennis McCarthy / USNO Subject: GPS Earth Orientation >From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 7 January 1994 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 48780.5 550 -1.86 -1.42 0.67 0.85 -49332.5 CODE(ITRF91) 48792.5 561 -0.73 -1.73 -4.83 0.79 0.94 1.90 -49352.5 JPL 48794.5 507 -0.82 -1.29 0.70 0.73 -49339.5 ESOC 48794.5 553 -1.05 -1.84 1.18 1.45 -49346.5 EMR 48830.5 478 -1.29 -0.98 0.70 0.78 -49353.5 344 0.00 0.87 GFZ 48997.5 354 -0.81 -0.82 0.41 0.40 -49346.5 NOAA 48988.5 357 -0.86 -1.57 1.07 1.35 -49355.5 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 49303.5 -0.35 1.12 0.36 0.56 -49332.5 CODE(ITRF91) 49323.5 -0.13 0.42 -2.99 0.39 0.37 0.16 -49352.5 JPL 49303.5 -0.17 -0.03 0.38 0.39 -49339.5 ESOC 49317.5 -0.15 0.36 0.52 0.62 -49346.5 EMR 49324.5 -0.19 -0.12 0.50 0.64 -49353.5 49320.5 -0.21 1.41 -49353.5 GFZ 49317.5 -0.11 0.22 0.35 0.34 -49346.5 NOAA 49326.5 0.82 1.11 0.53 0.67 -49355.5 -- 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