From mbourass at nrcan.gc.ca Thu Nov 17 22:49:07 2005 From: mbourass at nrcan.gc.ca (Martin Bourassa) Date: Fri, 18 Nov 2005 01:49:07 -0500 (EST) Subject: [IGSREPORT-13178] Wk 1347 IGS SINEX Combination Message-ID: <200511180649.jAI6n7B17303@cassini.geod.nrcan.gc.ca> ****************************************************************************** IGS Electronic Report 17 Nov 22:49:14 PST 2005 Message Number 13178 ****************************************************************************** Author: R. Ferland , M. Bourassa =================================================================== Combined AC solution for GPS week 1347 - 05/10/30 to 05/11/05 =================================================================== 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) igs05P1347.snx Combined weekly solution. igs05P1347.erp Daily Earth Rotation Parameters. igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013. IGS05P44.snx Cumulative Combined solution. igs05P1347.sum This file. igs05P1347.itr Residuals between the AC and the IGb00 for the RF stations. igs05P1347.res Residuals between the AC and the Combined Weekly solution. IGS05P44.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 = igs05P1347.snx IGS = IGS05P44.snx MIT = mit13477.snx mit = mit1347g.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: cod MANZ MIT MANZ mit MANZ 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 | 174 | 72 | 29.085 | 1.000 | 29.092 | emr | 42 | 30 | 4.891 | 1.000 | 4.891 | esa | 67 | 50 | 17.498 | 1.000 | 17.501 | gfz | 190 | 79 | 5.324 | 1.097 | 5.839 | jpl | 130 | 50 | 6.189 | 1.005 | 6.220 | MIT | 140 | 67 | 2.681 | 1.000 | 2.681 | ngs | 148 | 78 | 44.539 | 1.000 | 44.559 | sio | 174 | 78 | 2.655 | 1.000 | 2.656 | mit | 273 | 79 | 1.097 | 1.077 | 1.181 | ncl | 167 | 82 | 2.054 | 1.169 | 2.401 | igs | 260 | 82 | 1.379 | 1.015 | 1.399 | ---------------|-----|-----|---------------|---------------|---------------| 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 72 | 0.0 0.1 -0.6 | 3.5 3.2 12.1 | emr 30 | 0.2 -0.3 0.1 | 3.6 3.7 11.0 | esa 50 | -2.2 0.4 0.3 | 4.7 3.8 10.7 | gfz 79 | -1.5 -0.1 -0.7 | 4.1 3.3 13.2 | jpl 50 | -0.5 -0.1 0.3 | 3.2 3.1 12.7 | MIT 66 | -0.3 0.2 0.4 | 4.2 3.5 10.7 | ngs 78 | -1.8 0.5 0.4 | 3.8 5.7 13.7 | sio 78 | -1.8 0.1 1.5 | 3.8 3.4 12.0 | mit 79 | -0.8 0.2 0.2 | 4.0 2.9 11.9 | ncl 82 | -0.7 0.1 0.2 | 3.9 2.9 10.6 | ---------------|---------------------------|---------------------------| 5-2-2) With respect to the Weekly Combination: ================================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 171 | 0.4 -0.1 -0.5 | 1.3 1.8 5.4 | emr 42 | 0.3 -0.5 -0.7 | 2.1 1.6 5.7 | esa 65 | -1.6 -0.1 1.5 | 2.5 2.3 11.4 | gfz 184 | -0.5 -0.4 0.0 | 1.0 1.3 4.2 | jpl 128 | 0.1 0.1 2.3 | 1.6 1.7 8.7 | MIT 132 | 0.2 0.1 -0.3 | 1.6 1.7 4.8 | ngs 145 | -1.3 1.0 0.5 | 2.5 6.1 8.5 | sio 164 | -0.9 -0.0 -0.1 | 1.6 2.0 7.5 | mit 247 | 0.1 0.0 0.3 | 0.8 0.8 3.1 | ncl 163 | 0.1 -0.2 1.3 | 0.9 0.9 3.9 | ITR 81 | 0.6 -0.0 -1.7 | 3.3 3.0 9.5 | ---------------|---------------------------|---------------------------| 5-2-3) With respect to the Cumulative Combination: ===================================================== Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 164 | -0.4 0.1 -0.9 | 2.4 2.9 8.2 | emr 41 | -0.7 -0.6 -0.2 | 2.8 2.8 7.2 | esa 64 | -2.7 -0.1 0.4 | 3.3 3.1 11.7 | gfz 178 | -1.6 -0.3 -0.3 | 2.7 2.8 8.0 | jpl 117 | -0.8 -0.0 0.6 | 2.8 3.0 12.3 | MIT 128 | -0.8 0.3 -0.7 | 2.6 2.7 7.5 | ngs 143 | -2.1 1.1 0.4 | 3.3 6.9 10.2 | sio 157 | -1.8 0.2 0.1 | 2.6 3.0 11.2 | mit 227 | -0.9 0.2 -0.0 | 2.3 2.4 7.2 | ncl 160 | -0.9 -0.1 0.9 | 2.5 2.6 7.1 | igs 232 | -1.0 0.1 0.1 | 1.9 1.9 5.9 | ITR 86 | -0.5 -0.0 -0.9 | 1.9 2.0 5.8 | ---------------|---------------------------|---------------------------| 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 | -0.003 -0.005 0.012 6.4 9.1 -20.1 3.04 | emr | 0.039 -0.002 0.029 -2.4 -5.7 -22.0 4.49 | esa | 0.002 -0.016 0.008 1.7 2.9 -11.8 1.36 | gfz | 0.028 -0.025 0.009 -0.7 1.0 -4.6 2.17 | jpl | 0.151 -0.070 0.145 0.7 0.8 -4.9 1.14 | MIT | 0.004 -0.009 0.011 1.2 10.5 6.5 3.23 | ngs | 0.035 -0.109 0.008 1.3 2.0 -22.4 3.60 | sio | 0.001 -0.124 0.026 10.1 -1.4 3.2 -1.80 | mit | 0.009 0.006 -0.013 -1.4 0.2 -0.6 2.70 | ncl | 0.037 -0.059 0.016 0.4 0.6 -4.5 2.01 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 2.17 | ---------------|---------------------------------------------------------------| 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 | 0.047 0.047 0.053 1.2 1.2 1.2 0.19 | emr | 0.070 0.073 0.082 1.9 1.9 1.9 0.29 | esa | 0.054 0.055 0.062 1.4 1.4 1.4 0.22 | gfz | 0.045 0.044 0.051 1.2 1.2 1.2 0.18 | jpl | 0.054 0.056 0.062 1.4 1.4 1.4 0.22 | MIT | 0.048 0.048 0.054 1.2 1.2 1.2 0.19 | ngs | 0.045 0.045 0.052 1.2 1.2 1.2 0.18 | sio | 0.045 0.045 0.051 1.2 1.2 1.2 0.18 | mit | 0.044 0.045 0.052 1.2 1.2 1.2 0.18 | ncl | 0.044 0.044 0.050 1.1 1.1 1.1 0.18 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 1.96 | ---------------|---------------------------------------------------------------| 5-4) Geocenter: ==================== | X Y Z | s X s Y s Z | | (mm) (mm) (mm) | (mm) (mm) (mm) | ---------------|---------------------------|---------------------------| igs | 4.7 5.4 -7.9 | 3.3 3.5 4.5 | ---------------|---------------------------|---------------------------| 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 | --- -7.4 -0.2 --- -2.4 --- | emr | --- -20.0 0.2 0.6 -3.6 -2.5 | esa | --- -9.1 -0.0 --- 4.5 --- | gfz | --- -2.0 -0.2 1.1 -1.8 9.7 | jpl | --- -10.3 -0.2 8.6 0.2 2.6 | MIT | --- 9.3 -0.3 0.1 -0.9 -0.3 | ngs | --- -5.7 13.6 21.6 0.0 29.0 | sio | --- 26.5 1.7 -2.3 -1.9 -1.5 | mit | --- 15.3 -0.3 0.1 1.5 -0.5 | ncl | --- 11.8 -0.2 --- -1.7 --- | ITR | --- --- --- --- --- --- | BuA | --- -12.6 -1.6 0.8 26.6 2.6 | ---------------|------------------------------------------------------------| 5-5-2) STD : =============== Solution | UT LOD XPO XPOR YPO YPOR | | us us .01mas .01ma/d .01mas .01ma/d | ---------------|------------------------------------------------------------| cod | --- 11.1 2.7 --- 1.5 --- | emr | --- 4.7 2.8 11.8 3.2 17.5 | esa | --- 15.9 2.7 --- 2.9 --- | gfz | --- 5.8 1.8 6.3 2.1 6.6 | jpl | --- 22.7 1.8 16.9 2.6 8.4 | MIT | --- 4.3 1.4 5.9 2.1 8.0 | ngs | --- 26.9 6.1 31.3 9.6 25.4 | sio | --- 7.2 2.6 4.2 3.3 8.5 | mit | --- 2.5 1.4 3.1 1.9 4.9 | ncl | --- 3.0 0.7 --- 1.4 --- | ITR | --- --- --- --- --- --- | BuA | --- 6.3 6.0 4.5 5.6 12.3 | ---------------|------------------------------------------------------------| 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 ngs13477.snx |OHI2 A ----| -19.3 1.6 -72.4| | | | jpl13477.snx MIT13477.snx |SUNM A ----| 4.4 -10.6 70.9| | | | jpl13477.snx mit1347g.snx |SUNM A ----| 5.5 -7.3 89.7| | | | igs05P1346.snx jpl13477.snx |ALRT A ----| 0.3 23.0 -6.2| | | | IGS05P43.snx MIT13477.snx |ALRT A ----| 1.9 11.2 -0.7| IGS05P43.snx MIT13477.snx |OHI2 A ----| -11.1 -2.6 -46.7| | | | IGS05P43.snx ncl1347g.snx |THU2 A ----| -28.2 1.0 120.0| | | | IGS05P43.snx igs05P1347.snx |YAKT A ----| 7.5 -13.6 -31.7| | | | IGS05P44.snx igs05P1347.snx |ALRT A ----| 5.3 9.1 3.3| IGS05P44.snx igs05P1347.snx |MSKU A ----| -8.4 15.4 -29.6| IGS05P44.snx igs05P1347.snx |OHI2 A ----| -15.3 -0.9 -33.8| -----------------------------------------|------------|-----------------------| 5-7) Conflicts: ==================== IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs ============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== 43001M003 THU3 A 43001M002 THU3 A THU3 A THU3 A THU2 A THU3 A THU2 A THU3 A THU3 A THU3 A THU3 A 42202M005 AREQ A AREQ A AREQ A AREQ A AREQ A AREQ A AREQ B AREQ A AREQ A AREQ A 40451M123 GODE A GODZ A GODE A GODE A GODE A GODE A GODE A GODE A 50135M001 MAC1 B MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A MAC1 A 50103M108 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 DARW A DARR A DARW A DARW A DARW A DARW A DARW A 22003M001 PIMO A PIMO A PIMO B PIMO A PIMO A PIMO A PIMO A PIMO A PIMO A 22306M002 IISC A IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A 10422M001 KIR0 A KIR0 A KR0G A KR0G A 20703S001 RAMO A RAMO A RAMO A RAMO A ELRO A RAMO A RAMO A 23603S002 TWTF A TWTF A TWTF A TWTF A TWTF A TWTF A TWTF A MISSING IERS DOMES NOS AT MIT: ----------------------------- HLFX A PALM A PUR3 A ELEN A OUSD A MTJO A HORN A CNCL A QUAR A KARA A MAR6 A IENG A MISSING IERS DOMES NOS AT gfz: ----------------------------- BISH A PALM A MISSING IERS DOMES NOS AT sio: ----------------------------- KULU A SG21 A OUSD A CNCL A KARA A SAMP A MERS A BRAS A IERS DOMES NO mit ncl IGS igs ============= ====== ====== ====== ====== 43001M002 THU2 A THU2 A THU3 A THU3 A THU3 A 40451M123 GODZ A GODE A GODE A GODE A GODE A 50103M113 TID2 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 20703S001 RAMO A RAMO A ELRO A RAMO A RAMO A 12336M001 POLV A POLV A POLV A MISSING IERS DOMES NOS AT mit: ----------------------------- KOD1 A BISH A