From: Dennis McCarthy Subject: [IGSREPORT-3450] Wk 0892 GPS Earth Orientation Date: Thu, 13 Feb 1997 11:50:13 PST ****************************************************************************** IGS Electronic Report Thu Feb 13 11:50:13 PST 1997 Message Number 3450 ****************************************************************************** Author: Dennis McCarthy Subject: Wk 0892 GPS Earth Orientation From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 13 February 1997 An updated look at Earth orientation data submitted to the IERS follows. All GPS data are assumed to have adopted ITRF94 and so all statistics are referred to that reference system. Units are milliseconds of arc for x and y, and milliseconds of time for UT1-UTC. Below is the information 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 50451.5 -1.50 -0.96 1.54 0.75 -50480.5 CODE 50456.5 -0.28 -0.09 -20.10 0.09 0.14 0.20 -50485.5 JPL 50451.5 -0.19 -0.15 -0.56 0.13 0.12 0.66 -50480.5 ESOC 50451.5 -0.19 -0.58 0.18 0.23 -50480.5 NRCan 50457.5 -0.12 -0.59 9.73 0.15 0.23 0.32 -50486.5 GFZ 50451.5 -0.23 -0.40 0.11 0.11 -50480.5 NOAA 50460.5 -0.55 -0.61 0.36 0.45 -50489.5 USNO 50459.5 -0.50 -0.51 0.35 0.40 -50488.5 IGS Final 50451.5 -0.26 -0.36 0.08 0.09 -50480.5 IGS Rapid 50461.5 -0.32 -0.28 0.30 0.26 -50490.5 Plots of the residuals are available by FAX to anyone interested. -- Dennis D. McCarthy dmc@maia.usno.navy.mil Director, Directorate of Time phone: (202) 762-1837 U.S. Naval Observatory fax: (202) 762-1563 Washington, DC 20392-5420 [Mailed From: Dennis McCarthy ]