From Dennis Thu Dec 29 10:26:22 1994 From: Dennis (Dennis) Date: Thu, 29 Dec 1994 10:26:22 PST Subject: [IGSREPORT-1459] Wk 0781 GPS Earth Orientation Message-ID: ****************************************************************************** IGS Electronic Report Thu Dec 29 10:26:22 PST 1994 Message Number 1459 ****************************************************************************** Author: Dennis McCarthy Subject: Wk 0781 GPS Earth Orientation From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 29 December 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, NRCan, 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 48780.5 921 -1.39 -1.55 0.80 0.82 -49703.5 CODE 48792.5 917 0.11 -1.25 -1.33 0.60 0.74 2.97 -49708.5 JPL 48794.5 878 0.04 -1.43 0.56 0.63 -49703.5 ESOC 48794.5 910 -0.19 -1.78 0.94 1.15 -49703.5 NRCan 48830.5 835 -0.09 -0.99 0.55 0.82 -49710.5 688 1.08 1.62 GFZ 48997.5 718 -0.42 -1.52 0.35 0.35 -49710.5 NOAA 48988.5 709 -0.57 -1.39 1.00 1.13 -49711.5 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 49674.5 -0.83 -2.03 0.34 0.43 -49703.5 CODE 49679.5 -0.14 -1.84 -6.23 0.34 0.29 0.06 -49708.5 JPL 49674.5 0.20 -1.68 0.26 0.24 -49703.5 ESOC 49674.5 -0.08 -2.09 0.49 0.41 -49703.5 NRCan 49681.5 -0.17 -1.88 0.33 0.30 -49710.5 49681.5 3.99 0.09 -49710.5 GFZ 49681.5 -0.50 -1.50 0.30 0.28 -49710.5 NOAA 49682.5 -0.79 -1.05 0.50 0.41 -49711.5 -- 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 ]