Date: Thu, 7 Dec 2000 03:48:40 -0500 (EST) From: Tom Herring Message-Id: <200012070848.DAA24248@mtglas.mit.edu> To: igsreport@igscb.jpl.nasa.gov, simon@chandler.mit.edu, tah@mtglas.mit.edu Subject: [IGSREPORT-7796] Wk 1084 MIT T2 RNAAC Analyis Report Sender: owner-igsreport Precedence: bulk ****************************************************************************** IGS Electronic Report 07 Dec 00:48:41 PST 2000 Message Number 7796 ****************************************************************************** Author: Thomas Herring ******************************************************************************** MIT R/GNAAC ANALYSIS REPORT GPS-WEEK 1084 Dates: 00oct15 to 00oct21 ******************************************************************************** MIT (Massachusetts Institute of Technology) Room 54-618 77 Massachusetts Avenue, Cambridge, MA 02139 e-mail: tah@mtglas.mit.edu tel: (617)253-5941 (Tom Herring) fax: (617)253-1699 PRODUCTS GENERATED: The following products are generated and uploaded into CDDIS @ NASA/GSFC MIT1084p.SNX RNAAC combination sinex file from all available analysis centers with the GNAAC sinex files. MIT1084p.SUM Name of this summary file 0.0 Starting Week 1016 we starting using ITRF97 0.1 Starting Week 0939 we starting using ITRF96 and its reference site list. 0.2 Starting Week 0901 we started using a new apriori file not Non-ITRF94 coordinates based on the analysis of week 0822-0900 sinex files. This change will effect the corrdinate corrections given in this summary. 1.0 Analysis Procedures: (1) Each centers sinex solutions are de-constrained before combination. When center constraints are available, the constraints are loosened to +-1 meters. (2) Covariance matrices from each center are re-scaled based on the change in chi**2 when the RNAAC's sinex file is combined with the loose combination of the GNAAC's sinex files. To generate reasonable sigmas, the scale factor is set at 0.3 times the chi**2/degree of freedom increment. (3) The tight solution is generated with the following constraints on the ITRF94 core sites. In this analysis, the loose g-sinex file is combined with the RNAAC sinex files. Starting Week 0893 we stopped using MADR as a core site. Starting Week 0939: 47 Reference sites are used: Sig N Sig E Sig U (m) (m) (m) VILL 0.0027 0.0022 0.0032 MAS1 0.0031 0.0028 0.0031 FORT 0.0029 0.0031 0.0040 BRAZ 0.0031 0.0037 0.0068 KOUR 0.0028 0.0036 0.0070 OHIG 0.0042 0.0048 0.0053 BRMU 0.0023 0.0021 0.0032 THU1 0.0022 0.0023 0.0038 SANT 0.0031 0.0036 0.0042 AREQ 0.0041 0.0045 0.0052 WES2 0.0021 0.0019 0.0031 GODE 0.0020 0.0019 0.0028 ALGO 0.0020 0.0019 0.0028 NLIB 0.0021 0.0020 0.0039 MDO1 0.0021 0.0021 0.0036 PIE1 0.0021 0.0021 0.0037 YELL 0.0021 0.0021 0.0030 GOL2 0.0021 0.0021 0.0031 DRAO 0.0021 0.0021 0.0034 FAIR 0.0024 0.0022 0.0028 KOKB 0.0028 0.0027 0.0033 KWJ1 0.0034 0.0035 0.0042 MAC1 0.0040 0.0038 0.0044 TID2 0.0037 0.0033 0.0039 HOB2 0.0038 0.0034 0.0050 GUAM 0.0034 0.0036 0.0038 TSKB 0.0031 0.0032 0.0041 SHAO 0.0031 0.0033 0.0043 PERT 0.0037 0.0032 0.0042 YAR1 0.0036 0.0030 0.0029 IRKT 0.0029 0.0036 0.0037 LHAS 0.0031 0.0036 0.0041 DAV1 0.0039 0.0040 0.0050 KERG 0.0037 0.0038 0.0044 KIT3 0.0029 0.0033 0.0037 MALI 0.0034 0.0040 0.0046 ZWEN 0.0027 0.0027 0.0038 HART 0.0035 0.0039 0.0043 TROM 0.0025 0.0023 0.0028 MATE 0.0027 0.0024 0.0029 GRAZ 0.0027 0.0023 0.0022 POTS 0.0026 0.0022 0.0025 WTZR 0.0026 0.0022 0.0023 ONSA 0.0026 0.0022 0.0025 NYAL 0.0025 0.0022 0.0037 KOSG 0.0026 0.0022 0.0023 Earth rotation parameters are estimated for each center (even when not given in the original SINEX files. In this case the partial derivatives are computed from the station coordinates). (4) The summary below gives (a) The RMS difference between the GNAAC loose analysis and the GNAAC+RNAAC loose analysis. If this RMS is small then the RNAAC combination is not effecting the global coordinates solution significiantly. (b) For each RNAAC Center we give: (b.1) the VARIANCE rescaling factors used (determined as discussed above) and (b.2) the adjustment to the apriori coordinates of the sites for each RNAAC which are not included in the GNAAC analyses. The apriori coordinates are based on the analysis of the first five weeks of RNAAC sinex files. When an RNAAC has no unique sites, the adjustments are given for all sites in the center based on the analysis from that center alone. SUMMARY OF POSITIONS FOR WEEK 1084 IMPACT OF RNAACs on GNAAC Loose solution RMS change over 162 stations: .84 mm CENTER RESULTS For Center AUS VARIANCE FACTOR 121.21 Site dN +- dE +- dU +- Center (mm) (mm) (mm) (mm) (mm) (mm) DST1 8.2 0.9 32.1 1.6 349.0 4.8 Center AUS STR1 -111.9 0.9 -47.6 1.6 -9.7 4.9 Center AUS For Center EUR VARIANCE FACTOR 1 Site dN +- dE +- dU +- Center (mm) (mm) (mm) (mm) (mm) (mm) ACOR 63.4 0.7 85.0 0.6 -54.0 3.2 Center EUR AJAC 12.8 0.6 68.9 0.5 11.9 2.6 Center EUR ALAC 153.4 0.9 -11.8 0.8 544.9 4.7 Center EUR BELL 114.7 0.7 -22.2 0.7 560.8 3.7 Center EUR BOGO -1.2 0.7 4.4 0.5 -6.0 2.8 Center EUR BZRG 53.8 0.8 -93.5 0.7 564.6 3.7 Center EUR CAME 104.2 0.7 -117.5 0.6 549.6 3.5 Center EUR CASC -4.2 0.6 3.7 0.6 5.7 3.0 Center EUR CREU 13.7 0.8 57.5 0.7 -17.4 4.4 Center EUR DELF 3.2 0.6 2.8 0.5 2.6 2.4 Center EUR DENT 7.0 0.6 0.5 0.6 -8.8 3.0 Center EUR DOUR -3.9 0.6 -0.1 0.5 -1.6 2.7 Center EUR DRES 44.9 0.6 56.0 0.6 5.6 3.0 Center EUR DUBR 119.4 0.7 -153.5 0.6 541.1 3.1 Center EUR EBRE 2.9 0.6 0.3 0.6 -15.4 2.9 Center EUR EIJS -4.1 0.7 -0.3 0.6 2.7 3.4 Center EUR ESCO 29.2 0.7 48.2 0.6 48.3 3.4 Center EUR EUSK 44.7 0.8 54.5 0.7 -29.2 4.1 Center EUR GENO 84.4 0.7 -83.3 0.7 560.3 3.6 Center EUR HELG 46.4 0.6 51.9 0.5 -27.9 2.5 Center EUR HOBU 43.7 0.6 44.6 0.5 -64.4 2.8 Center EUR ISTA 0.6 0.6 56.3 0.6 -18.8 2.8 Center EUR JOEN 3.0 0.6 -9.7 0.5 -7.0 2.7 Center EUR KARL 43.4 0.6 58.6 0.6 -15.7 2.9 Center EUR KIR0 6.5 0.6 4.3 0.5 -12.4 2.9 Center EUR KLOP 44.7 0.7 53.8 0.6 -36.9 3.5 Center EUR LAMP 196.6 0.8 -113.9 0.7 517.0 3.7 Center EUR LLIV 29.9 0.7 5.9 0.6 93.7 3.3 Center EUR MANS 3.4 0.8 0.9 0.7 0.1 4.3 Center EUR MAR6 2.3 0.6 -5.1 0.5 -15.9 2.4 Center EUR MARS 11.6 0.6 22.6 0.6 -10.4 3.1 Center EUR MOPI 10.4 0.7 -1.7 0.6 61.9 3.5 Center EUR OSJE 37.6 0.6 59.0 0.5 9.1 2.8 Center EUR PFAN 7.3 0.6 7.0 0.5 -47.2 2.8 Center EUR PTBB 47.1 0.6 52.5 0.5 -35.4 2.6 Center EUR RIGA 4.0 0.7 6.0 0.6 6.2 3.6 Center EUR SBGZ 41.0 0.6 42.3 0.6 1.2 2.9 Center EUR SODA 3.3 0.6 -10.8 0.5 -27.7 2.9 Center EUR SOFI -1.2 0.7 3.3 0.6 4.7 3.7 Center EUR SRJV 106.7 0.6 -152.2 0.6 539.3 2.8 Center EUR SVTL -1.4 0.9 -3.5 1.0 0.2 4.0 Center EUR TERS 15.9 0.6 20.5 0.5 11.9 2.4 Center EUR TORI 75.2 0.8 -73.3 0.7 561.9 4.1 Center EUR TRAB 19.1 0.8 74.8 0.6 -17.3 3.7 Center EUR TUBI 1.4 0.6 80.7 0.5 11.8 2.8 Center EUR UNPG 105.1 0.7 -114.5 0.7 548.5 3.6 Center EUR UZHL 2.9 0.7 4.8 0.6 -21.7 3.4 Center EUR VAAS 5.6 0.6 -6.7 0.5 -14.1 2.5 Center EUR VENE 14.1 0.8 0.4 0.7 -73.4 6.0 Center EUR VIL0 6.9 0.5 -3.4 0.5 -7.5 2.4 Center EUR VIS0 0.9 0.6 -2.3 0.5 7.9 2.6 Center EUR WARE 4.7 0.6 1.1 0.5 -16.6 2.8 Center EUR WROC 0.1 0.7 -0.6 0.6 -1.4 3.3 Center EUR For Center SIR VARIANCE FACTOR 7.47 Site dN +- dE +- dU +- Center (mm) (mm) (mm) (mm) (mm) (mm) BOGA -38.6 0.9 -25.7 1.5 4.9 6.4 Center SIR BOMJ 10.4 1.0 -5.0 1.5 -4.3 6.4 Center SIR BRAZ 11.9 1.4 12.1 1.8 9.7 5.9 Center SIR CART -65.8 0.9 -11.2 1.4 34.7 6.6 Center SIR CUIB 5.7 2.0 10.5 3.5 -1.6 15.1 Center SIR ESTI 10.3 0.9 -4.5 1.3 -0.5 5.5 Center SIR IGM0 6.7 1.0 15.7 1.0 1.2 5.2 Center SIR IMPZ 9.1 3.4 -9.5 11.2 -14.8 34.5 Center SIR JAMA -30.6 2.1 -7.8 2.5 -67.2 15.4 Center SIR MARA 4.6 1.1 12.3 1.7 -24.9 9.1 Center SIR PALM 37.3 1.1 40.5 0.9 -89.1 4.8 Center SIR PARA 32.1 1.1 -14.8 1.3 7.1 6.8 Center SIR POAL 8.5 1.1 2.7 1.2 29.7 6.2 Center SIR RECF -27.1 1.1 -54.8 1.7 1.3 7.1 Center SIR RWSN 17.7 1.1 21.6 1.0 32.9 5.2 Center SIR SALV -26.4 1.1 -53.3 1.6 23.2 7.6 Center SIR TEGU 1.4 1.0 -8.8 1.4 -12.6 6.6 Center SIR UEPP 29.7 1.1 -18.2 1.4 3.9 6.3 Center SIR VBCA 1.5 1.1 4.9 1.0 -8.9 4.9 Center SIR VICO 12.4 1.1 0.4 1.5 20.5 7.2 Center SIR