Date: Mon, 21 May 2001 12:02:58 -0700 (PDT) From: Michael B Heflin Message-Id: <200105211902.MAA11999@elsinore.jpl.nasa.gov> To: SCIGN@IGSCB.JPL.NASA.GOV Subject: [SCIGN-948] Problem Sites Sender: owner-scign Precedence: bulk ****************************************************************************** SCIGN Electronic Mail 21 May 12:02:59 PDT 2001 Message Number 948 ****************************************************************************** Author: Michael B. Heflin Most of the SCIGN sites are working well but a few have shown large offsets or non-linear trends in 2000 or 2001 which are problematic. Previous mail indicates the offset at BGIS was found to be vandalism. It would be nice to understand the causes of problems at the other sites listed below, particularly BILL, CJMS, and WMAP. Sites with large position offsets in cm Site Time N E V 3D ----------------------------------------- BGIS 2000.64 1.80 0.06 0.18 1.81 BILL 2000.56 13.40 -4.18 -3.03 14.36 CJMS 2000.65 10.52 2.62 -23.70 26.06 SIO3 2000.28 -1.51 0.22 3.72 4.02 TOST 2000.68 -1.88 3.65 -3.31 5.27 TOST 2000.96 1.93 -4.00 3.49 5.65 WMAP 2000.56 0.18 26.55 -13.44 29.76 Sites with large non-linear trends estimated as rate changes in mm/yr Site Time N E V 3D ----------------------------------------- BILL 2000.56 -30.50 9.45 3.41 32.11 CJMS 2000.65 -28.94 -7.33 53.97 61.68 WMAP 2000.56 -0.59 -61.95 25.11 66.85