From sinex at geod.nrcan.gc.ca Wed Jun 24 15:12:52 2009 From: sinex at geod.nrcan.gc.ca (IGS SINEX) Date: Wed, 24 Jun 2009 18:12:52 -0400 Subject: [IGSREPORT-17525] Wk 1535 IGS SINEX Combination Message-ID: <200906242212.n5OMCq1S028858@newton.geod.nrcan.gc.ca> ****************************************************************************** IGS Electronic Report 24 Jun 15:12:58 PDT 2009 Message Number 17525 ****************************************************************************** Author: R. Ferland, M. Piraszewski =============================================================== Combined AC solution for GPS week 1535 - 09/06/07 to 09/06/13 =============================================================== 1) Contacts: ============ e-mail: rferland at nrcan.gc.ca Tel: (613)995-4002 (Remi Ferland) Fax: (613)995-3215 2) Products: ============ All products are available at: CDDIS (cddis.gsfc.nasa.gov) and SOPAC (garner.ucsd.edu) igs09P1535.snx Combined weekly solution. igs09P1535.erp Daily Earth Rotation Parameters. igs00p03.erp Daily Earth Rotation Parameters since GPS week 860. IGS09P23.snx Cumulative Combined solution. igs09P1535.sum This file. igs09P1535.itr Residuals between the AC and the IGS05 for the RF stations. igs09P1535.res Residuals between the AC and the Combined Weekly solution. IGS09P23.res Residuals between the AC and the Cumulative Combined solution. Where IGSyyPww & igsyyPwwww represent: yy Last 2 digits of the year ww week in year yy wwww GPS week P GPS technique used 3) Combination Strategy: ======================== The AC solutions are processed using the following procedure: 3-1) The AC solutions are checked/corrected for possible format problems, station names inconsistencies, etc... 3-2) The AC solutions are unconstrained according to the information provided in the SOLUTION/APRIORI Block. 3-3) The AC solutions are aligned (using a 7-parameters) and compared to the IGS05 stations at the current epoch. ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS05.snx 3-4) The AC are compared to IGS05, to each other, to the previous week solution and to the cumulative solution in order to identify and remove outliers. 3-5) The weekly AC solutions are combined and added to the cumulative combined solution. The cumulative combination is done to ensures 14 parameters singularity. The weekly combined solution is aligned to the IGS05 of the current epoch using a 7-parameters transformation. The singular cumulative combined solution is aligned to the IGS05 of the reference epoch using a 14-parameters transformation and the 132 ITRF station positions and velocities. The IGS05 is a realization of ITRF2005. For more details, see: Blewitt, G., C. Boucher and J. Kouba, 1997, Procedure for ITRF continuous realization, the report of the IGS GB, presented to the IGS Governing Board Meeting held in San Francisco, Dec. 11. Kouba, J., J. Ray and M.M. Watkins, IGS Reference Frame Realization, 1998 IGS Analysis Center Workshop Proceedings, European Space Operations Centre, Darmstadt, Germany. The combination software was developed at NRCan. 4) Remarks: =========== ITR = IGS05.snx igs = igs09P1535.snx IGS = IGS09P23.snx MIT = mit15357.snx mit = mit1535g.snx BuA = IERS Bulletin A grg mit ncl are used to quality control the weekly combination. gfz excluded from the geocenter estimation (Sec. 5-4). Solutions with manual station deletion: From the original solution: cod SATA X Y Z emr SATA X Y Z gfz SATA X Y Z MIT SATA X Y Z sio SATA X Y Z mit SATA X Y Z After unconstraining: grg FAIR NOVM mit ETAD KUUJ 4-1) Starting with GPS week 1400, the solutions are aligned to the IGS05.snx realization of ITRF2005. 4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A is included in the erp files. 4-3) Starting with GPS week 1412, the accumulated ERP file has been changed from "igs00p02.erp" to "igs00p03.erp". The main changes are: 1) Correction of the pole position from IGb00 to IGS05 using the transformation in: http://igscb.jpl.nasa.gov/mail/igsmail/2006/msg00178.html 2) Marginal ERP's in GPS week 1161 were replaced by reprocessed values. 5) Results: =========== 5-1) AC (Variance Factor)^0.5 estimates: ============================================= The residuals used in the estimation of the Variance Factor are the differences between the cumulative combined solution and each AC weekly solution. SF = (Variance Factor)^0.5 = (Chi^2/dof)^0.5 Final(SF) = Apriori(SF) * Aposteriori(SF) Solution |# sta| #RF | Apriori(SF)|Aposteriori(SF)| Final(SF)| ---------------|-----|-----|---------------|---------------|---------------| cod | 215 | 70 | 19.138 | 1.000 | 19.135 | emr | 72 | 38 | 5.538 | 1.001 | 5.542 | esa | 121 | 45 | 5.288 | 1.000 | 5.288 | gfz | 188 | 67 | 13.265 | 1.000 | 13.261 | jpl | 134 | 57 | 8.521 | 0.997 | 8.493 | MIT | 250 | 77 | 2.152 | 1.000 | 2.151 | ngs | 216 | 73 | 35.399 | 1.000 | 35.390 | sio | 255 | 74 | 2.147 | 1.000 | 2.146 | grg | 107 | 45 | 17.354 | 1.000 | 17.354 | mit | 404 | 75 | 2.162 | 1.000 | 2.162 | ncl | 214 | 77 | 2.606 | 1.000 | 2.605 | igs | 352 | 78 | 1.449 | 0.995 | 1.442 | ---------------|-----|-----|---------------|---------------|---------------| 5-2) Solution Residuals weighted Average & STD: ==================================================== 5-2-1) With respect to the IGS05 stations: ============================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 70 | 0.0 0.1 0.1 | 2.8 2.8 9.3 | emr 38 | -2.0 0.1 0.2 | 3.2 3.0 11.3 | esa 44 | -1.0 -0.2 0.2 | 3.8 2.9 10.8 | gfz 67 | -0.7 0.1 0.1 | 2.8 2.7 9.1 | jpl 57 | -0.5 0.3 0.3 | 2.7 2.7 10.7 | MIT 77 | 0.1 0.1 1.3 | 2.7 3.0 9.2 | ngs 73 | -0.1 0.0 0.3 | 2.5 2.6 9.3 | sio 74 | 0.1 0.1 0.4 | 2.6 2.7 8.2 | grg 45 | 0.2 0.1 -1.5 | 2.3 1.0 6.4 | mit 75 | -0.3 0.1 0.7 | 2.7 2.7 9.1 | ncl 77 | 0.0 0.1 0.1 | 2.6 2.7 9.2 | ---------------|---------------------------|---------------------------| 5-2-2) With respect to the Weekly Combination: ================================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 205 | 0.2 0.1 -0.3 | 0.7 0.6 2.7 | emr 70 | -1.9 -0.4 0.2 | 2.4 1.9 6.4 | esa 114 | -1.1 -0.3 -0.9 | 2.3 1.4 3.9 | gfz 184 | -0.6 0.2 -0.3 | 0.8 1.0 2.6 | jpl 132 | -0.2 -0.4 1.0 | 1.5 2.4 4.5 | MIT 223 | 0.3 0.1 0.3 | 0.8 0.7 2.1 | ngs 202 | -0.2 -0.1 -0.5 | 1.4 1.3 2.6 | sio 245 | 0.7 0.2 0.4 | 1.0 0.8 2.7 | grg 107 | 0.9 0.2 -0.9 | 2.8 4.9 10.5 | mit 348 | -0.1 0.0 0.1 | 0.6 0.4 1.6 | ncl 210 | 0.2 0.0 -0.1 | 0.6 0.7 1.6 | ITR 77 | 0.3 -0.3 -0.4 | 2.6 2.4 8.0 | ---------------|---------------------------|---------------------------| 5-2-3) With respect to the Cumulative Combination: ===================================================== Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 175 | -0.9 0.1 0.1 | 1.5 1.7 5.2 | emr 69 | -2.9 -0.2 0.9 | 2.9 2.3 7.8 | esa 96 | -2.4 -0.3 -0.7 | 2.9 1.8 6.4 | gfz 168 | -1.6 0.3 0.2 | 1.9 2.0 4.7 | jpl 122 | -1.4 -0.1 1.7 | 2.0 3.3 5.9 | MIT 194 | -0.6 0.1 0.9 | 1.9 2.2 4.7 | ngs 170 | -1.2 0.1 -0.2 | 2.1 1.9 4.8 | sio 207 | -0.4 0.4 0.4 | 1.7 1.8 4.4 | grg 102 | -0.3 0.2 -0.8 | 2.9 4.8 9.2 | mit 249 | -1.0 0.1 0.3 | 1.9 1.8 3.9 | ncl 197 | -0.9 0.1 0.4 | 1.7 1.9 4.3 | igs 249 | -1.1 0.0 0.3 | 1.4 1.4 4.0 | ITR 119 | -0.7 -0.1 -0.1 | 2.5 2.5 9.3 | ---------------|---------------------------|---------------------------| 5-3) 7-Parameters Transformation: AC ----> IGS05.snx ========================================================= 5-3-1) Estimates: ==================== Solution | R X R Y R Z T X T Y T Z SCL | | (mas) (mas) (mas) (mm) (mm) (mm) (ppb) | ---------------|---------------------------------------------------------------| cod | -0.003 -0.003 -0.005 0.0 0.7 0.2 0.12 | emr | 0.068 -0.007 0.074 10.2 -12.9 -0.7 -0.02 | esa | 0.002 -0.028 0.043 4.5 -1.6 17.0 0.16 | gfz | 0.009 0.007 0.002 0.1 0.7 1.7 -0.17 | jpl | 0.020 0.000 -0.009 4.8 -4.7 -2.8 0.21 | MIT | -0.008 0.011 -0.009 4.2 -4.9 14.3 0.01 | ngs | -0.107 -0.120 0.014 11.1 -9.9 7.9 0.12 | sio | -0.011 -0.034 -0.028 0.0 -0.9 -5.7 0.15 | grg | -0.017 -0.017 -0.006 10.9 -1.8 2.1 0.03 | mit | -0.014 0.017 -0.004 -0.7 0.0 1.3 0.01 | ncl | 0.018 0.018 0.010 -0.6 1.1 0.3 0.06 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.07 | ---------------|---------------------------------------------------------------| 5-3-2) STD: ============== Solution | R X R Y R Z T X T Y T Z SCL | | (mas) (mas) (mas) (mm) (mm) (mm) (ppb) | ---------------|---------------------------------------------------------------| cod | 0.048 0.050 0.053 1.3 1.3 1.3 0.20 | emr | 0.061 0.066 0.071 1.7 1.7 1.7 0.26 | esa | 0.057 0.063 0.066 1.5 1.5 1.5 0.24 | gfz | 0.049 0.050 0.053 1.3 1.3 1.3 0.20 | jpl | 0.052 0.053 0.059 1.4 1.4 1.4 0.21 | MIT | 0.046 0.048 0.050 1.2 1.2 1.2 0.19 | ngs | 0.047 0.050 0.052 1.3 1.3 1.2 0.19 | sio | 0.046 0.049 0.051 1.2 1.2 1.2 0.19 | grg | 0.058 0.060 0.068 1.6 1.5 1.5 0.24 | mit | 0.046 0.048 0.051 1.2 1.2 1.2 0.19 | ncl | 0.046 0.048 0.050 1.2 1.2 1.2 0.19 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.12 | ---------------|---------------------------------------------------------------| 5-4) Geocenter: ==================== | X Y Z | s X s Y s Z | | (mm) (mm) (mm) | (mm) (mm) (mm) | ---------------|---------------------------|---------------------------| igs | 5.8 -5.8 5.6 | 1.0 0.8 2.2 | ---------------|---------------------------|---------------------------| 5-5) ERP Residuals Weighted Average & STD: =============================================== 5-5-1) Weighted Average: =========================== Solution | UT LOD XPO XPOR YPO YPOR | | us us .01mas .01ma/d .01mas .01ma/d | ---------------|------------------------------------------------------------| cod | --- --- --- --- --- --- | emr | --- -19.8 3.3 -3.9 3.2 10.2 | esa | --- -11.2 -3.9 -0.7 -2.0 3.4 | gfz | --- -8.5 0.1 6.2 -1.8 -8.1 | jpl | --- 1.6 -24.4 -1.0 -3.0 -1.7 | MIT | --- 10.9 1.2 -6.2 -1.5 4.6 | ngs | --- 1.4 -5.8 0.1 0.6 10.9 | sio | --- -10.6 3.5 --- 1.5 --- | grg | --- 9.2 -3.7 9.4 -2.1 -11.5 | mit | --- 32.6 2.0 -12.7 2.0 12.1 | ncl | --- --- --- --- --- --- | ITR | --- --- --- --- --- --- | BuA | --- -1.3 -0.6 9.7 1.1 -12.0 | ---------------|------------------------------------------------------------| 5-5-2) STD: ============== Solution | UT LOD XPO XPOR YPO YPOR | | us us .01mas .01ma/d .01mas .01ma/d | ---------------|------------------------------------------------------------| cod | --- --- --- --- --- --- | emr | --- 11.6 2.1 8.4 2.1 4.8 | esa | --- 6.9 1.6 6.8 2.2 13.2 | gfz | --- 6.3 2.6 5.5 1.3 5.4 | jpl | --- 8.7 7.6 11.8 4.8 7.7 | MIT | --- 1.9 1.0 4.1 0.7 5.3 | ngs | --- 8.1 5.4 9.9 4.3 13.3 | sio | --- 1.8 1.2 --- 0.7 --- | grg | --- 25.0 5.1 8.2 3.3 4.5 | mit | --- 4.4 1.2 5.7 0.7 5.2 | ncl | --- --- --- --- --- --- | ITR | --- --- --- --- --- --- | BuA | --- 21.2 6.5 10.6 5.2 5.0 | ---------------|------------------------------------------------------------| 5-6) Satellite Antenna Offset Residuals weighted Average & STD: ==================================================================== No Satellite phase center ... 5-7) Outliers: =================== Thresholds set at 5 sigmas and 50 mm. Solution Solution | Station | N E U | Minus |code id soln| (mm) (mm) (mm)| -----------------------------------------|------------|-----------------------| | | | ITRF_IGS05.snx cod15357.snx |SUTH A 1| 2.1 -2.2 99.4| | | | ITRF_IGS05.snx cod15357.snx |MAW1 A 1| 1.0 1.8 -21.4| | | | ITRF_IGS05.snx gfz15357.snx |POLV A 1| 1.0 1.1 -26.5| | | | ITRF_IGS05.snx sio15357.snx |NYA1 A 2| -0.8 -0.1 27.4| | | | ITRF_IGS05.snx mit1535g.snx |SUTH A 1| 0.8 -1.6 97.1| | | | igs09P1534.snx cod15357.snx |HERS A 4| 15.6 1.3 -4.4| | | | IGS09P22.snx cod15357.snx |EIL1 A 3| -1.3 11.3 4.9| IGS09P22.snx cod15357.snx |MNLS A 1| -13.3 0.5 4.1| | | | IGS09P22.snx esa15357.snx |WUHN A 4| -15.7 6.1 -5.2| | | | IGS09P22.snx gfz15357.snx |EIL1 A 3| -1.8 9.8 4.4| | | | IGS09P22.snx jpl15357.snx |XIAN A 1| -12.1 36.4 -35.5| | | | IGS09P22.snx MIT15357.snx |NETT A 1| 10.6 -66.3 -11.6| | | | IGS09P22.snx sio15357.snx |HERS A 4| 11.0 2.0 -6.0| | | | IGS09P22.snx mit1535g.snx |NETT A 1| 10.6 -66.3 -13.1| IGS09P22.snx mit1535g.snx |TAH2 A 1| -67.7 -3.9 86.7| | | | IGS09P22.snx mit1535g.snx |XIAN A 1| -13.5 35.5 -33.2| | | | IGS09P22.snx ncl1535g.snx |TAH2 A 1| -67.8 -3.6 87.2| | | | IGS09P22.snx igs09P1535.snx |BRMU A 2| 6.7 8.5 -7.2| IGS09P22.snx igs09P1535.snx |PARC A 1| -3.0 6.8 1.9| IGS09P22.snx igs09P1535.snx |UNSA A 1| -4.3 7.7 0.2| -----------------------------------------|------------|-----------------------|