From rferland at nrcan.gc.ca Thu Apr 21 21:54:26 2005 From: rferland at nrcan.gc.ca (Remi Ferland) Date: Fri, 22 Apr 2005 00:54:26 -0400 (EDT) Subject: [IGSREPORT-12478] Wk 1317 IGS SINEX Combination Message-ID: <200504220454.j3M4sQW12962@cassini.geod.nrcan.gc.ca> ****************************************************************************** IGS Electronic Report 21 Apr 21:54:32 PDT 2005 Message Number 12478 ****************************************************************************** Author: R. Ferland , D. Hutchison =================================================================== Combined AC solution for GPS week 1317 - 05/04/03 to 05/04/09 =================================================================== 1) Contacts: ============ e-mail: ferland at geod.nrcan.gc.ca Tel: (613)995-4002 (Remi Ferland) Fax: (613)995-3215 2) Products: ============ All products are available at cddisa.gsfc.nasa.gov and at garner.ucsd.edu igs05P1317.snx Combined weekly solution. igs05P1317.erp Daily Earth Rotation Parameters. igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013. IGS05P14.snx Cumulative Combined solution. igs05P1317.sum This file. igs05P1317.itr Residuals between the AC and the IGb00 for the RF stations. igs05P1317.res Residuals between the AC and the Combined Weekly solution. IGS05P14.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 IGb00 stations at the current epoch. ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS03P33_RS99.SNX.Z 3-4) The AC are compared to IGb00, 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 IGb00 of the current epoch using a 7-parameters transformation. The singular cumulative combined solution is aligned to the IGb00 of the reference epoch using a 14-parameters transformation and the 99 ITRF station positions and velocities. The IGb00 is a realization of ITRF2000. 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 = IGS03P33_RS99.SNX igs = igs05P1317.snx IGS = IGS05P14.snx MIT = mit13177.snx mit = mit1317g.snx BuA = IERS Bulletin A mit ncl are used to quality control the weekly combination. gfz ngs excluded from the geocenter estimation (Sec. 5-4). Solutions with manual station deletion: After unconstraining: esa MCM4 jpl ASPA sio SAMP mit SAMP 4-1) Starting with GPS week 1143, the solutions are aligned to the IGS03P33_RS99.SNX realization of ITRF2000. 4-2) Starting with GPS week 1078, UT1-UTC from IERS Bulletin A is included in the erp files. 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 | 163 | 69 | 25.216 | 1.001 | 25.231 | emr | 44 | 34 | 5.242 | 1.001 | 5.245 | esa | 68 | 49 | 7.645 | 1.001 | 7.652 | gfz | 189 | 78 | 9.196 | 1.000 | 9.200 | jpl | 114 | 49 | 5.224 | 1.001 | 5.227 | MIT | 145 | 64 | 2.590 | 1.001 | 2.591 | ngs | 143 | 78 | 26.548 | 1.000 | 26.554 | sio | 175 | 76 | 2.708 | 1.000 | 2.709 | mit | 280 | 78 | 0.975 | 1.001 | 0.976 | ncl | 167 | 81 | 2.606 | 1.122 | 2.923 | igs | 254 | 81 | 1.471 | 0.995 | 1.463 | ---------------|-----|-----|---------------|---------------|---------------| 5-2) Solution Residuals weighted Average & STD : ===================================================== 5-2-1) With respect to the IGb00 stations: ============================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 69 | 0.6 -0.0 -0.3 | 3.2 3.1 10.2 | emr 34 | -1.0 0.2 1.1 | 2.8 3.6 11.7 | esa 49 | -0.6 0.5 0.3 | 3.4 3.4 10.4 | gfz 78 | 0.3 0.1 -0.8 | 3.3 3.2 11.7 | jpl 49 | 0.2 0.2 -0.2 | 3.1 3.4 10.9 | MIT 64 | 0.6 0.2 0.2 | 3.5 3.6 10.6 | ngs 78 | -2.1 0.5 0.6 | 5.4 4.6 13.3 | sio 76 | 1.8 0.0 -0.0 | 3.2 3.7 9.9 | mit 78 | -0.0 0.1 -0.1 | 3.0 3.1 10.6 | ncl 81 | 0.4 0.1 -0.0 | 3.0 3.0 9.2 | ---------------|---------------------------|---------------------------| 5-2-2) With respect to the Weekly Combination: ================================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 159 | 0.0 0.1 -0.5 | 1.1 1.0 3.9 | emr 43 | -1.1 -0.2 1.1 | 1.6 1.5 7.2 | esa 65 | -1.2 -0.3 1.7 | 2.7 2.0 13.5 | gfz 183 | -0.1 -0.0 -0.1 | 1.0 1.2 4.2 | jpl 111 | -0.6 0.3 1.5 | 1.6 1.9 7.4 | MIT 132 | 0.3 -0.0 0.4 | 1.4 1.5 4.0 | ngs 139 | -3.0 0.5 1.6 | 3.7 3.2 7.9 | sio 160 | 1.5 -0.2 -0.8 | 1.1 1.8 3.7 | mit 247 | -0.4 0.2 -0.4 | 0.7 0.6 2.6 | ncl 162 | 0.0 0.0 0.5 | 0.8 0.4 2.4 | ITR 80 | -0.5 -0.1 -0.7 | 2.8 2.9 9.6 | ---------------|---------------------------|---------------------------| 5-2-3) With respect to the Cumulative Combination: ===================================================== Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 129 | 0.7 0.2 -0.9 | 2.1 2.5 7.2 | emr 41 | -0.9 0.0 0.6 | 2.2 2.9 8.5 | esa 64 | -0.9 -0.0 0.1 | 3.0 3.0 12.0 | gfz 160 | 0.5 0.0 -0.5 | 2.1 2.7 7.6 | jpl 91 | 0.1 0.3 1.2 | 2.2 3.1 8.6 | MIT 116 | 0.7 0.2 0.0 | 2.3 2.7 7.2 | ngs 130 | -2.3 0.7 0.8 | 4.2 3.8 10.8 | sio 143 | 1.9 -0.1 -1.2 | 2.4 3.1 7.0 | mit 179 | 0.2 0.3 -0.7 | 2.0 2.3 7.0 | ncl 146 | 0.5 0.1 -0.0 | 1.9 2.3 6.0 | igs 181 | 0.5 -0.0 -0.3 | 1.9 2.0 5.9 | ITR 86 | -0.4 0.0 -0.7 | 1.4 1.5 4.6 | ---------------|---------------------------|---------------------------| 5-3) 7-Parameters Transformation: AC ----> IGS03P33_RS99.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 | -0.025 0.012 -0.051 9.6 7.1 10.5 3.08 | emr | 0.010 0.004 -0.009 -7.1 -7.4 -0.2 4.38 | esa | 0.003 -0.004 0.002 -5.5 3.5 -1.1 3.69 | gfz | 0.026 -0.025 0.007 -1.3 0.6 -4.3 2.43 | jpl | 0.119 -0.017 0.104 -6.7 -0.5 3.3 1.59 | MIT | 0.073 -0.053 -0.042 5.5 -1.8 13.6 3.54 | ngs | -0.167 0.267 -0.033 2.4 -3.3 68.9 3.85 | sio | -0.040 -0.083 0.037 7.1 -5.0 1.5 3.64 | mit | -0.009 0.015 -0.006 -1.7 -1.2 -1.6 3.40 | ncl | -0.017 -0.060 -0.001 0.2 -0.4 -2.2 2.92 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 3.27 | ---------------|---------------------------------------------------------------| 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 | 0.049 0.047 0.054 1.2 1.2 1.2 0.19 | emr | 0.067 0.065 0.075 1.7 1.7 1.7 0.27 | esa | 0.055 0.057 0.063 1.5 1.5 1.5 0.23 | gfz | 0.045 0.044 0.051 1.2 1.2 1.2 0.18 | jpl | 0.057 0.055 0.063 1.4 1.4 1.4 0.23 | MIT | 0.049 0.049 0.055 1.3 1.3 1.3 0.20 | ngs | 0.045 0.044 0.052 1.2 1.2 1.2 0.18 | sio | 0.046 0.045 0.052 1.2 1.2 1.2 0.18 | mit | 0.045 0.045 0.052 1.2 1.2 1.2 0.18 | ncl | 0.044 0.043 0.050 1.2 1.2 1.1 0.18 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 0.89 | ---------------|---------------------------------------------------------------| 5-4) Geocenter: ==================== | X Y Z | s X s Y s Z | | (mm) (mm) (mm) | (mm) (mm) (mm) | ---------------|---------------------------|---------------------------| igs | 4.4 0.3 4.7 | 3.2 3.3 4.3 | ---------------|---------------------------|---------------------------| 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 | --- -3.6 0.6 --- 0.9 --- | emr | --- -9.4 -0.6 9.1 -6.5 13.5 | esa | --- 27.3 -4.9 --- -0.1 --- | gfz | --- 4.0 2.8 -9.4 2.3 7.9 | jpl | --- 17.0 2.6 -18.0 1.9 16.3 | MIT | --- -0.9 -1.1 -0.5 -3.8 0.6 | ngs | --- 13.2 -16.0 11.9 -7.0 -26.6 | sio | --- -4.2 -0.6 5.8 -0.4 -4.8 | mit | --- 39.2 -4.2 0.2 -0.3 0.8 | ncl | --- 13.7 -0.1 --- 0.8 --- | ITR | --- --- --- --- --- --- | BuA | --- 7.7 -1.0 -1.7 24.0 2.2 | ---------------|------------------------------------------------------------| 5-5-2) STD : =============== Solution | UT LOD XPO XPOR YPO YPOR | | us us .01mas .01ma/d .01mas .01ma/d | ---------------|------------------------------------------------------------| cod | --- 7.9 1.4 --- 1.2 --- | emr | --- 5.2 1.8 5.5 3.0 8.9 | esa | --- 15.9 3.8 --- 4.8 --- | gfz | --- 3.9 2.2 8.6 2.2 5.7 | jpl | --- 12.7 1.9 11.8 2.1 7.7 | MIT | --- 5.0 2.1 7.1 2.2 6.5 | ngs | --- 13.2 4.4 37.2 9.7 18.7 | sio | --- 7.0 2.9 6.7 3.5 10.8 | mit | --- 8.9 2.0 10.4 2.0 4.9 | ncl | --- 0.8 1.0 --- 0.5 --- | ITR | --- --- --- --- --- --- | BuA | --- 19.2 8.8 16.1 12.9 12.8 | ---------------|------------------------------------------------------------| 5-6) Outliers: =================== Thresholds set at 5 sigmas and 50 mm. Solution Solution | Station | N E U | Minus |code id soln| (mm) (mm) (mm)| -----------------------------------------|------------|-----------------------| | | | IGS03P33_RS99.snx sio13177.snx |TSKB A ----| 7.5 3.8 -28.8| | | | IGS05P13.snx ncl1317g.snx |THU2 A ----| -20.5 -0.9 85.3| | | | IGS05P13.snx igs05P1317.snx |FAIR A 2| -0.4 6.2 1.3| IGS05P13.snx igs05P1317.snx |GRAZ A ----| 1.8 -7.4 -4.0| IGS05P13.snx igs05P1317.snx |MAG0 A ----| 5.1 8.6 -12.8| IGS05P13.snx igs05P1317.snx |NTUS A 2| 2.4 11.2 1.5| -----------------------------------------|------------|-----------------------| 5-7) Conflicts: ==================== IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs ============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== 43001M002 THU2 A THU3 A THU3 A THU3 A THU2 A THU3 A THU2 A THU3 A THU3 A THU3 A THU3 A 40451M123 GODE A GODZ A GODE A GODE A GODE A GODE A GODE A GODE A 50103M108 TIDB A TIDB A TIDB A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A TID1 A TIDB A TID2 A 50134M002 DARR A 50134M001 DARW A DARR A DARW A DARW A DARR A DARW A DARW A DARW A DARW A DARW A 22306M002 IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A 10422M001 KIR0 A KIR0 A KR0G A 13102M001 REDU A REDU A MISSING IERS DOMES NOS AT MIT: ----------------------------- HLFX A PALM A PUR3 A MIA3 A KYW1 A MCD1 A UPO1 A OUSD A MTJO A HORN A CNCL A QUAR A KARA A MAC1 B MAR6 A IENG A MISSING IERS DOMES NOS AT gfz: ----------------------------- BISH A PALM A MISSING IERS DOMES NOS AT ngs: ----------------------------- CHUM A MISSING IERS DOMES NOS AT sio: ----------------------------- KULU A SG21 A DOAR A OUSD A CNCL A KARA A SAMP A MERS A CAVA A SFEL A VOLT A BRAS A IERS DOMES NO mit ncl IGS igs ============= ====== ====== ====== ====== 13407S014 MAD2 A 13407S012 MADR A MAD2 A MADR A MADR A MADR A 43001M002 THU2 A THU2 A THU3 A THU3 A THU3 A 40451M123 GODZ A GODE A GODE A GODE A GODE A 50103M108 TIDB A TID2 A TIDB A TIDB A TIDB A 50134M002 DARR A 50134M001 DARW A DARR A DARW A DARW A DARW A 30315M001 RBAY A RBAY A RBAY A RBAY A MISSING IERS DOMES NOS AT mit: ----------------------------- MAC1 B BISH A