From sinex at geod.nrcan.gc.ca Wed Jan 20 18:02:59 2010 From: sinex at geod.nrcan.gc.ca (IGS SINEX) Date: Wed, 20 Jan 2010 21:02:59 -0500 Subject: [IGSREPORT-18206] Wk 1565 IGS SINEX Combination Message-ID: <201001210202.o0L22xJR026342@newton.geod.nrcan.gc.ca> ****************************************************************************** IGS Electronic Report 20 Jan 18:03:32 PST 2010 Message Number 18206 ****************************************************************************** Author: R. Ferland, M. Piraszewski =============================================================== Combined AC solution for GPS week 1565 - 10/01/03 to 10/01/09 =============================================================== 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) igs10P1565.snx Combined weekly solution. igs10P1565.erp Daily Earth Rotation Parameters. igs00p03.erp Daily Earth Rotation Parameters since GPS week 860. IGS10P01.snx Cumulative Combined solution. igs10P1565.sum This file. igs10P1565.itr Residuals between the AC and the IGS05 for the RF stations. igs10P1565.res Residuals between the AC and the Combined Weekly solution. IGS10P01.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 = igs10P1565.snx IGS = IGS10P01.snx MIT = mit15657.snx mit = mit1565g.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 esa 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 ASPA 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 | 225 | 63 | 30.972 | 1.000 | 30.973 | emr | 85 | 41 | 7.355 | 1.000 | 7.355 | esa | 123 | 39 | 5.749 | 1.000 | 5.749 | gfz | 186 | 61 | 18.787 | 1.000 | 18.788 | jpl | 124 | 42 | 11.048 | 1.000 | 11.048 | MIT | 243 | 67 | 3.119 | 1.000 | 3.119 | ngs | 206 | 64 | 48.881 | 1.000 | 48.882 | sio | 251 | 65 | 3.134 | 1.000 | 3.134 | grg | 100 | 39 | 11.098 | 1.000 | 11.098 | mit | 413 | 64 | 2.483 | 1.000 | 2.483 | ncl | 215 | 67 | 1.383 | 1.002 | 1.385 | igs | 362 | 70 | 1.598 | 1.000 | 1.598 | ---------------|-----|-----|---------------|---------------|---------------| 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 63 | -1.2 0.2 0.0 | 3.3 2.8 8.4 | emr 41 | 0.0 0.1 0.1 | 3.7 3.8 8.8 | esa 39 | 0.4 -0.1 0.4 | 3.3 3.4 8.3 | gfz 61 | -0.9 0.2 0.2 | 3.2 3.0 8.0 | jpl 42 | -0.6 -0.1 -0.5 | 3.6 3.9 8.6 | MIT 67 | -0.4 0.3 0.6 | 3.2 3.2 7.7 | ngs 64 | 0.1 0.0 0.2 | 2.9 3.1 8.0 | sio 65 | -0.1 0.2 0.4 | 3.7 3.1 8.0 | grg 39 | -0.4 0.1 0.2 | 4.6 3.0 7.4 | mit 63 | -0.7 0.1 0.1 | 2.9 3.0 6.9 | ncl 67 | -0.5 0.2 0.0 | 3.2 3.3 7.6 | ---------------|---------------------------|---------------------------| 5-2-2) With respect to the Weekly Combination: ================================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 214 | -0.7 -0.1 0.7 | 1.1 1.0 3.1 | emr 83 | 0.4 -0.6 0.3 | 1.5 1.4 3.7 | esa 118 | 0.9 -0.1 2.1 | 2.1 1.2 4.6 | gfz 182 | -0.1 0.1 -0.3 | 0.8 0.9 2.4 | jpl 119 | -0.1 0.0 0.2 | 1.6 2.4 5.7 | MIT 219 | 0.2 0.1 0.3 | 0.6 0.7 1.9 | ngs 191 | 0.9 0.0 0.0 | 1.3 1.6 3.0 | sio 245 | 0.6 0.2 0.2 | 1.1 0.7 2.4 | grg 96 | 0.0 -0.2 -0.1 | 3.8 2.6 5.6 | mit 355 | -0.3 -0.2 -0.4 | 0.3 0.3 1.3 | ncl 210 | 0.0 -0.1 0.0 | 0.5 0.7 1.6 | ITR 69 | 0.7 -0.2 -0.8 | 2.9 2.9 7.2 | ---------------|---------------------------|---------------------------| 5-2-3) With respect to the Cumulative Combination: ===================================================== Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 190 | -2.2 0.2 0.3 | 2.4 2.2 7.7 | emr 75 | -1.7 -0.1 -1.0 | 2.9 2.7 8.1 | esa 98 | -1.2 0.6 0.8 | 2.2 2.4 8.1 | gfz 169 | -1.9 0.4 -1.2 | 2.4 2.5 6.5 | jpl 113 | -1.9 0.2 0.1 | 2.9 3.9 7.8 | MIT 194 | -1.6 0.2 -0.5 | 2.3 2.2 6.3 | ngs 174 | -0.8 0.1 -1.0 | 2.4 3.1 7.3 | sio 213 | -0.8 0.0 0.1 | 2.6 2.2 6.9 | grg 96 | -1.5 -0.2 0.4 | 3.5 3.5 7.9 | mit 273 | -1.9 -0.1 -0.7 | 2.4 2.2 6.8 | ncl 197 | -1.7 0.1 -0.9 | 2.3 2.5 6.8 | igs 275 | -1.6 0.0 -0.3 | 2.2 2.1 6.4 | ITR 112 | -0.8 -0.1 -0.1 | 2.6 2.8 10.3 | ---------------|---------------------------|---------------------------| 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 | -0.013 -0.005 -0.028 -0.1 1.2 0.1 0.18 | emr | 0.052 -0.012 0.011 13.9 -6.4 7.8 0.42 | esa | 0.048 -0.077 0.041 8.9 0.5 2.9 0.15 | gfz | 0.014 -0.015 -0.004 0.0 1.2 0.9 0.29 | jpl | 0.012 -0.049 -0.023 7.0 0.0 14.9 0.46 | MIT | -0.007 0.007 -0.040 4.5 -1.3 1.5 0.34 | ngs | -0.099 -0.119 0.019 10.0 -7.9 -0.1 0.35 | sio | -0.010 -0.006 0.030 2.0 0.4 2.2 0.44 | grg | 0.024 0.020 -0.007 5.9 11.8 9.5 1.21 | mit | 0.010 0.016 0.004 -0.4 1.5 1.6 0.38 | ncl | 0.002 0.045 0.041 -0.4 0.5 1.8 0.37 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.33 | ---------------|---------------------------------------------------------------| 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 | 0.050 0.051 0.058 1.3 1.3 1.3 0.21 | emr | 0.060 0.065 0.071 1.7 1.6 1.6 0.26 | esa | 0.060 0.065 0.071 1.6 1.6 1.6 0.26 | gfz | 0.051 0.052 0.057 1.3 1.3 1.3 0.21 | jpl | 0.059 0.062 0.069 1.6 1.6 1.6 0.25 | MIT | 0.049 0.051 0.055 1.3 1.3 1.3 0.20 | ngs | 0.050 0.052 0.056 1.3 1.3 1.3 0.21 | sio | 0.049 0.051 0.055 1.3 1.3 1.3 0.20 | grg | 0.062 0.066 0.074 1.7 1.7 1.7 0.26 | mit | 0.050 0.051 0.058 1.3 1.3 1.3 0.21 | ncl | 0.049 0.051 0.055 1.3 1.3 1.3 0.20 | 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 | 7.5 -3.6 1.2 | 1.5 1.1 3.3 | ---------------|---------------------------|---------------------------| 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 | --- -23.0 1.9 9.9 -0.9 1.6 | esa | --- 4.5 -1.3 -1.5 1.2 -4.3 | gfz | --- 1.1 0.5 8.6 1.2 -4.4 | jpl | --- -26.0 4.0 -0.1 -2.0 5.3 | MIT | --- 2.8 -0.3 -10.6 0.8 -0.9 | ngs | --- -9.8 3.7 10.9 -3.2 -19.4 | sio | --- -7.2 -0.3 --- 1.9 --- | grg | --- -13.0 -6.5 42.7 -0.1 -6.2 | mit | --- -7.8 -3.1 9.5 0.0 -20.1 | ncl | --- --- --- --- --- --- | ITR | --- --- --- --- --- --- | BuA | --- -1.7 5.3 2.4 4.3 3.2 | ---------------|------------------------------------------------------------| 5-5-2) STD: ============== Solution | UT LOD XPO XPOR YPO YPOR | | us us .01mas .01ma/d .01mas .01ma/d | ---------------|------------------------------------------------------------| cod | --- --- --- --- --- --- | emr | --- 11.4 3.0 7.7 1.9 5.5 | esa | --- 13.3 2.1 11.3 2.4 11.1 | gfz | --- 10.5 1.4 8.4 1.8 5.8 | jpl | --- 8.6 1.6 13.8 2.1 2.9 | MIT | --- 5.6 1.0 8.8 1.1 4.4 | ngs | --- 11.8 4.7 3.7 4.2 9.8 | sio | --- 6.4 1.9 --- 1.6 --- | grg | --- 17.6 5.8 10.6 3.1 10.3 | mit | --- 4.7 2.0 4.9 1.6 4.0 | ncl | --- --- --- --- --- --- | ITR | --- --- --- --- --- --- | BuA | --- 23.6 4.4 8.2 4.0 15.8 | ---------------|------------------------------------------------------------| 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 emr15657.snx |GRAS A 3| -9.3 17.4 1.8| | | | ITRF_IGS05.snx jpl15657.snx |NLIB A 2| -1.5 -1.3 -148.5| | | | ITRF_IGS05.snx mit1565g.snx |NLIB A 2| -0.9 -0.7 -147.3| | | | ITRF_IGS05.snx mit1565g.snx |GOLD A 7| -8.6 -1.5 8.5| | | | IGS09P52.snx cod15657.snx |VALD A 1| -12.5 7.7 -8.5| | | | IGS09P52.snx MIT15657.snx |CRU1 A 1| -25.0 41.2 -5.3| IGS09P52.snx MIT15657.snx |NETT A 1| 12.6 -63.0 4.3| | | | IGS09P52.snx MIT15657.snx |SCH2 A 2| -4.5 2.3 33.4| | | | IGS09P52.snx sio15657.snx |SCH2 A 2| -2.9 2.0 35.5| | | | IGS09P52.snx mit1565g.snx |CRU1 A 1| -25.7 40.7 -5.3| IGS09P52.snx mit1565g.snx |NETT A 1| 12.4 -63.6 2.7| | | | IGS09P52.snx mit1565g.snx |DGAR A 1| -12.5 -14.0 -11.8| IGS09P52.snx mit1565g.snx |WUHN A 4| -11.0 0.2 -4.7| | | | IGS09P52.snx igs10P1565.snx |EIL1 A 1| -5.6 -8.1 -21.6| IGS09P52.snx igs10P1565.snx |TWTF A 2| -7.5 -1.1 2.5| IGS09P52.snx igs10P1565.snx |UNSA A 1| -5.8 10.3 -7.0| IGS09P52.snx igs10P1565.snx |YAKT A 6| -5.9 7.4 3.7| -----------------------------------------|------------|-----------------------|