From tah at mtglas2.mit.edu Wed Jan 7 23:19:24 2004 From: tah at mtglas2.mit.edu (Tom Herring) Date: Thu, 8 Jan 2004 02:19:24 -0500 (EST) Subject: [IGSREPORT-10925] Wk 1245 MIT T2 RNAAC Analyis Report Message-ID: <200401080719.CAA18576@mtglas2.mit.edu> ****************************************************************************** IGS Electronic Report 07 Jan 23:17:57 PST 2004 Message Number 10925 ****************************************************************************** Author: Thomas Herring ******************************************************************************** MIT R/GNAAC ANALYSIS REPORT GPS-WEEK 1245 Dates: 03nov16 to 03nov22 ******************************************************************************** MIT (Massachusetts Institute of Technology) Room 54-618 77 Massachusetts Avenue, Cambridge, MA 02139 e-mail: tah at 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 MIT1245p.SNX RNAAC combination sinex file from all available analysis centers with the GNAAC sinex files. MIT1245p.SUM Name of this summary file 0.1 Starting Week 1239 we adopted IGb00 reference system (given in IGS03P33_RS99.snx) 0.1 Starting Week 1016 we starting using ITRF97 0.2 Starting Week 0939 we starting using ITRF96 and its reference site list. 0.3 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 IGb00 core sites. In this analysis, the loose g-sinex file is combined with the RNAAC sinex files. Sig N Sig E Sig U (m) (m) (m) VESL 0.0058 0.0056 0.0187 VILL 0.0018 0.0016 0.0044 SFER 0.0044 0.0058 0.0146 GOUG 0.0046 0.0053 0.0151 ASC1 0.0024 0.0031 0.0064 HOFN 0.0058 0.0045 0.0193 MAS1 0.0020 0.0018 0.0042 FORT 0.0024 0.0023 0.0049 KELY 0.0248 0.0211 0.0756 STJO 0.0018 0.0014 0.0032 KOUR 0.0025 0.0024 0.0069 OHI2 0.0268 0.0201 0.0724 LPGS 0.0027 0.0026 0.0056 CRO1 0.0024 0.0019 0.0064 UNSA 0.0074 0.0082 0.0324 SCH2 0.0024 0.0021 0.0071 RIOG 0.0038 0.0040 0.0099 THU3 0.0328 0.0281 0.1232 SANT 0.0027 0.0025 0.0046 WES2 0.0020 0.0014 0.0036 NRC1 0.0021 0.0018 0.0047 GODE 0.0021 0.0015 0.0054 ALGO 0.0019 0.0014 0.0029 MANA 0.0103 0.0170 0.0404 NLIB 0.0020 0.0015 0.0042 CHUR 0.0020 0.0015 0.0057 DUBO 0.0025 0.0020 0.0076 FLIN 0.0020 0.0015 0.0054 MDO1 0.0022 0.0017 0.0044 PIE1 0.0022 0.0017 0.0052 EISL 0.0029 0.0031 0.0063 YELL 0.0016 0.0014 0.0033 GOLD 0.0021 0.0016 0.0035 DRAO 0.0019 0.0015 0.0032 FAIR 0.0031 0.0026 0.0099 THTI 0.0044 0.0065 0.0162 MKEA 0.0024 0.0023 0.0057 KOKB 0.0033 0.0042 0.0110 CHAT 0.0023 0.0022 0.0038 AUCK 0.0022 0.0022 0.0042 MCM4 0.0021 0.0023 0.0052 BILI 0.0077 0.0065 0.0244 NOUM 0.0029 0.0033 0.0095 MAC1 0.0021 0.0021 0.0041 PETP 0.0035 0.0031 0.0109 MAG0 0.0027 0.0024 0.0073 TIDB 0.0020 0.0019 0.0035 HOB2 0.0021 0.0020 0.0044 TOW2 0.0035 0.0038 0.0132 GUAM 0.0030 0.0040 0.0112 YSSK 0.0045 0.0038 0.0134 TSKB 0.0018 0.0016 0.0037 ALIC 0.0035 0.0039 0.0161 CEDU 0.0037 0.0036 0.0151 JAB1 0.0050 0.0056 0.0224 DARW 0.0044 0.0056 0.0184 YAKT 0.0149 0.0135 0.0342 TIXI 0.0029 0.0026 0.0100 KARR 0.0036 0.0042 0.0157 PERT 0.0019 0.0019 0.0042 YAR1 0.0019 0.0018 0.0038 CAS1 0.0021 0.0022 0.0049 IRKT 0.0016 0.0015 0.0035 NTUS 0.0026 0.0039 0.0097 COCO 0.0035 0.0050 0.0139 KSTU 0.0023 0.0022 0.0071 LHAS 0.0018 0.0019 0.0047 URUM 0.0040 0.0035 0.0127 DAV1 0.0021 0.0022 0.0056 IISC 0.0021 0.0031 0.0069 POL2 0.0017 0.0018 0.0046 DGAR 0.0022 0.0031 0.0077 KERG 0.0019 0.0023 0.0042 KIT3 0.0016 0.0016 0.0035 MAW1 0.0043 0.0043 0.0154 ARTU 0.0040 0.0034 0.0119 BAHR 0.0018 0.0018 0.0040 MALI 0.0020 0.0031 0.0060 TRAB 0.0130 0.0108 0.0441 SYOG 0.0072 0.0061 0.0260 NICO 0.0023 0.0022 0.0077 RBAY 0.0141 0.0170 0.0623 GLSV 0.0030 0.0025 0.0100 HRAO 0.0025 0.0031 0.0083 JOZE 0.0017 0.0014 0.0050 LAMA 0.0018 0.0014 0.0062 TRO1 0.0030 0.0026 0.0092 BOR1 0.0016 0.0014 0.0040 MATE 0.0017 0.0014 0.0037 GRAZ 0.0017 0.0014 0.0047 POTS 0.0015 0.0013 0.0037 WTZR 0.0015 0.0013 0.0029 ONSA 0.0015 0.0013 0.0031 NYAL 0.0015 0.0017 0.0071 NKLG 0.0054 0.0078 0.0211 ZIMM 0.0018 0.0014 0.0050 GRAS 0.0019 0.0015 0.0057 WSRT 0.0018 0.0015 0.0043 BRUS 0.0016 0.0013 0.0039 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 1245 IMPACT OF RNAACs on GNAAC Loose solution RMS change over 260 stations: 1.62 mm CENTER RESULTS For Center AUS VARIANCE FACTOR 31.19 Site dN +- dE +- dU +- Center (mm) (mm) (mm) (mm) (mm) (mm) AUST -2.3 0.6 0.1 0.9 5.5 1.9 Center AUS For Center GSI VARIANCE FACTOR 5.82 Site dN +- dE +- dU +- Center (mm) (mm) (mm) (mm) (mm) (mm) CCJM 44.5 1.1 -1.3 2.2 8.9 7.3 Center GSI KNYA 37.8 1.3 2.3 2.5 29.2 8.9 Center GSI MZSW 31.1 1.2 -4.7 1.2 25.5 6.9 Center GSI OKNW 40.5 1.3 -0.7 3.1 0.7 9.6 Center GSI STKW 19.5 1.2 10.0 1.6 -17.9 6.9 Center GSI TKBA 29.7 1.1 -0.9 1.1 160.6 6.8 Center GSI TOHK 34.2 1.1 -6.3 2.1 1.4 7.0 Center GSI For Center SIR VARIANCE FACTOR 12.44 Site dN +- dE +- dU +- Center (mm) (mm) (mm) (mm) (mm) (mm) ANTC 17.6 0.8 2.8 0.7 40.7 1.6 Center SIR BOGA 12.8 0.6 -2.8 0.6 -46.1 1.2 Center SIR BOMJ -4.4 0.7 13.6 0.7 3.0 1.6 Center SIR COPO 17.0 0.8 6.6 0.7 51.3 1.4 Center SIR CRAT 1.9 0.7 -1.8 0.7 -7.3 1.2 Center SIR CUIB -9.1 0.8 2.0 0.7 -4.3 2.0 Center SIR IGM0 -23.0 0.8 -20.5 0.7 -50.8 1.8 Center SIR IGM1 12.3 0.8 -57.1 0.7 95.6 1.2 Center SIR IMPZ -16.9 0.7 13.1 0.7 140.2 1.7 Center SIR IQQE 0.6 0.8 9.1 0.7 21.5 1.7 Center SIR MARA 19.9 0.7 -14.8 0.8 -63.0 3.0 Center SIR MPLA -1.3 0.8 -6.3 0.7 0.6 1.3 Center SIR PARA -8.1 0.8 -0.8 0.7 -8.9 1.7 Center SIR POAL 2.1 0.8 -4.1 0.7 5.7 1.7 Center SIR RECF 5.6 0.7 -6.1 0.7 -7.2 1.5 Center SIR RIOD 3.2 0.8 0.8 0.7 10.9 1.8 Center SIR RWSN 2.9 0.9 -2.0 0.7 2.4 2.0 Center SIR SALV 4.1 0.7 -7.0 0.7 -8.6 2.0 Center SIR SMAR 0.5 0.8 -11.0 0.7 24.5 1.5 Center SIR TGCV 14.2 0.7 12.8 0.8 21.1 2.1 Center SIR TUCU 11.1 0.8 -12.0 0.7 42.1 2.0 Center SIR UEPP -11.8 0.8 8.7 0.7 -0.2 1.7 Center SIR VBCA -49.7 0.8 -10.7 0.7 -122.1 1.9 Center SIR VICO -10.1 0.7 17.6 0.7 16.4 1.5 Center SIR