From Dennis Thu Nov 3 09:55:46 1994 From: Dennis (Dennis) Date: Thu, 3 Nov 1994 9:55:46 PST Subject: [IGSREPORT-1341] Wk 0773 GPS Earth Orientation Message-ID: ****************************************************************************** IGS Electronic Report Thu Nov 3 9:55:46 PST 1994 Message Number 1341 ****************************************************************************** Author: Dennis McCarthy Subject: Wk 0773 GPS Earth Orientation From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 3 November 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 48780.5 865 -1.42 -1.52 0.81 0.84 -49647.5 CODE 48792.5 863 0.12 -1.22 -1.02 0.61 0.76 2.78 -49654.5 JPL 48794.5 822 0.03 -1.41 0.58 0.65 -49647.5 ESOC 48794.5 854 -0.20 -1.76 0.97 1.18 -49647.5 NRCan 48830.5 779 -0.09 -0.92 0.56 0.80 -49654.5 632 0.82 1.44 GFZ 48997.5 662 -0.42 -1.52 0.36 0.36 -49654.5 NOAA 48988.5 652 -0.54 -1.42 1.04 1.17 -49654.5 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 49618.5 -0.92 -1.60 0.40 0.44 -49647.5 CODE 49625.5 -0.07 -1.53 -5.60 0.36 0.27 0.25 -49654.5 JPL 49618.5 0.12 -1.76 0.39 0.34 -49647.5 ESOC 49618.5 0.02 -2.18 0.43 0.35 -49647.5 NRCan 49625.5 -0.32 -1.94 0.47 0.36 -49654.5 49625.5 3.92 0.17 -49654.5 GFZ 49625.5 -0.34 -1.51 0.50 0.29 -49654.5 NOAA 49625.5 -1.28 -1.32 0.55 0.54 -49654.5 -- 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 ]