From Dennis Thu Feb 23 09:45:39 1995 From: Dennis (Dennis) Date: Thu, 23 Feb 1995 9:45:39 PST Subject: [IGSREPORT-1580] Wk 0789 GPS Earth Orientation Message-ID: ****************************************************************************** IGS Electronic Report Thu Feb 23 9:45:39 PST 1995 Message Number 1580 ****************************************************************************** Author: Dennis McCarthy Subject: Wk 0789 GPS Earth Orientation From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 23 February 1995 An updated look at Earth orientation data submitted to the IERS follows. Data reduced in the ITRF93 have been used where available. Means refer to the ITRF93 for all contributors. 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 48780.5 977 -1.00 -0.01 0.86 0.83 -49759.5 CODE 48792.5 974 0.41 0.16 -1.62 0.57 0.70 3.14 -49765.5 JPL 48794.5 934 0.38 0.13 0.56 0.59 -49759.5 49648.5 112 -0.14 0.20 -49759.5 ESOC 48794.5 973 0.16 -0.23 0.93 1.11 -49766.5 NRCan 48830.5 890 0.27 0.51 0.53 0.79 -49765.5 743 1.27 1.77 GFZ 48997.5 774 -0.04 0.07 0.35 0.35 -49766.5 NOAA 48988.5 765 -0.21 0.19 0.99 1.13 -49767.5 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 49730.5 -0.11 -0.65 1.55 0.70 -49759.5 CODE 49736.5 0.20 0.05 -6.98 0.35 0.25 0.33 -49765.5 JPL 49730.5 0.20 0.01 -0.40 0.51 0.35 0.17 -49759.5 ESOC 49737.5 -0.07 -0.23 0.65 0.49 -49766.5 NRCan 49736.5 0.34 -0.46 4.13 0.50 0.35 0.06 -49765.5 GFZ 49737.5 0.02 -0.14 0.49 0.31 -49766.5 NOAA 49738.5 -0.12 -0.09 0.46 0.43 -49767.5 -- Dennis D. McCarthy dmc at maia.usno.navy.mil Head, Earth Orientation Department phone: (202) 653-0066 U.S. Naval Observatory fax: (202) 653-0587 Washington, DC 20392-5420 [Mailed From: Dennis McCarthy ]