From Dennis Thu Oct 6 09:21:27 1994 From: Dennis (Dennis) Date: Thu, 6 Oct 1994 9:21:27 PDT Subject: [IGSREPORT-1275] Wk 0769 GPS Earth Orientation Message-ID: ****************************************************************************** IGS Electronic Report Thu Oct 6 9:21:27 PDT 1994 Message Number 1275 ****************************************************************************** Author: Dennis McCarthy Subject: Wk 0769 GPS Earth Orientation From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 6 October 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 48780.5 837 -1.44 -1.52 0.82 0.85 -49619.5 CODE 48792.5 834 0.12 -1.21 -0.87 0.62 0.76 2.70 -49625.5 JPL 48794.5 794 0.02 -1.39 0.58 0.66 -49619.5 ESOC 48794.5 833 -0.21 -1.75 0.98 1.19 -49626.5 NRCan 48830.5 751 -0.08 -0.88 0.57 0.79 -49626.5 604 0.68 1.30 GFZ 48997.5 627 -0.42 -1.51 0.35 0.38 -49619.5 NOAA 48988.5 625 -0.52 -1.43 1.05 1.19 -49627.5 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 49590.5 -0.98 -1.91 0.39 0.43 -49619.5 CODE 49596.5 -0.28 -1.64 -4.92 0.29 0.25 0.30 -49625.5 JPL 49590.5 -0.20 -1.77 0.36 0.36 -49619.5 ESOC 49597.5 -0.23 -2.21 0.51 0.43 -49626.5 NRCan 49597.5 -0.55 -1.93 0.43 0.30 -49626.5 49597.5 3.55 0.18 -49626.5 GFZ 49590.5 -0.67 -1.77 0.34 0.26 -49619.5 NOAA 49598.5 -1.13 -1.05 0.79 0.54 -49627.5 -- 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 ]