From Dennis Thu Sep 15 08:56:35 1994 From: Dennis (Dennis) Date: Thu, 15 Sep 1994 8:56:35 PDT Subject: [IGSREPORT-1229] Wk 0766 GPS Earth Orientation Message-ID: ****************************************************************************** IGS Electronic Report Thu Sep 15 8:56:35 PDT 1994 Message Number 1229 ****************************************************************************** Author: Dennis McCarthy Subject: Wk 0766 GPS Earth Orientation From: Dennis McCarthy Subject: Preliminary look at GPS Earth orientation Date: 15 September 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 48780.5 808 -1.46 -1.52 0.82 0.84 -49591.5 CODE 48792.5 814 0.13 -1.20 -0.77 0.62 0.77 2.65 -49605.5 JPL 48794.5 773 0.03 -1.38 0.59 0.66 -49598.5 ESOC 48794.5 812 -0.21 -1.74 0.99 1.20 -49605.5 NRCan 48830.5 730 -0.06 -0.85 0.57 0.78 -49605.5 583 0.57 1.19 GFZ 48997.5 613 -0.42 -1.51 0.35 0.39 -49605.5 NOAA 48988.5 605 -0.49 -1.44 1.05 1.21 -49607.5 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 49562.5 -0.52 -1.27 0.55 0.54 -49591.5 CODE 49576.5 -0.18 -1.75 -4.75 0.31 0.33 0.07 -49605.5 JPL 49569.5 0.05 -1.65 0.46 0.43 -49598.5 ESOC 49576.5 -0.22 -2.05 0.41 0.38 -49605.5 NRCan 49576.5 -0.45 -1.97 0.51 0.44 -49605.5 49576.5 3.10 0.13 -49605.5 GFZ 49576.5 -0.67 -1.83 0.44 0.42 -49605.5 NOAA 49578.5 -0.55 -0.95 0.46 0.72 -49607.5 -- 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 ]