From mbourass at nrcan.gc.ca Thu Oct 20 22:59:51 2005 From: mbourass at nrcan.gc.ca (Martin Bourassa) Date: Fri, 21 Oct 2005 01:59:51 -0400 (EDT) Subject: [IGSREPORT-13080] Wk 1343 IGS SINEX Combination Message-ID: <200510210559.j9L5xpJ11556@cassini.geod.nrcan.gc.ca> ****************************************************************************** IGS Electronic Report 20 Oct 22:59:58 PDT 2005 Message Number 13080 ****************************************************************************** Author: R. Ferland , D. Hutchison =================================================================== Combined AC solution for GPS week 1343 - 05/10/02 to 05/10/08 =================================================================== 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 cddisa.gsfc.nasa.gov and at garner.ucsd.edu igs05P1343.snx Combined weekly solution. igs05P1343.erp Daily Earth Rotation Parameters. igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013. IGS05P40.snx Cumulative Combined solution. igs05P1343.sum This file. igs05P1343.itr Residuals between the AC and the IGb00 for the RF stations. igs05P1343.res Residuals between the AC and the Combined Weekly solution. IGS05P40.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 = igs05P1343.snx IGS = IGS05P40.snx MIT = mit13437.snx mit = mit1343g.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 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 | 176 | 72 | 22.463 | 1.001 | 22.491 | emr | 42 | 29 | 5.372 | 1.001 | 5.376 | esa | 63 | 48 | 11.791 | 1.000 | 11.797 | gfz | 189 | 81 | 4.071 | 1.001 | 4.076 | jpl | 118 | 51 | 5.732 | 1.001 | 5.738 | MIT | 145 | 66 | 2.424 | 1.001 | 2.426 | ngs | 146 | 78 | 36.842 | 1.001 | 36.866 | sio | 174 | 79 | 2.454 | 1.001 | 2.456 | mit | 260 | 78 | 1.002 | 1.001 | 1.003 | ncl | 169 | 82 | 1.642 | 1.001 | 1.644 | igs | 261 | 84 | 1.616 | 1.003 | 1.621 | ---------------|-----|-----|---------------|---------------|---------------| 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 | 1.0 0.1 -0.7 | 3.7 3.6 11.8 | emr 29 | -0.1 0.1 -0.0 | 4.0 4.0 12.4 | esa 48 | -0.8 0.4 0.2 | 4.7 3.7 10.4 | gfz 80 | -1.0 0.1 -0.4 | 3.8 3.6 12.4 | jpl 51 | -0.0 0.2 0.3 | 3.7 4.3 11.9 | MIT 65 | 0.9 0.2 0.2 | 3.8 4.1 10.4 | ngs 78 | -0.5 -0.1 0.6 | 4.5 4.7 13.7 | sio 79 | -0.6 0.1 1.2 | 3.7 3.8 10.5 | mit 78 | 0.1 0.2 0.1 | 3.1 3.3 10.6 | ncl 82 | 0.3 0.1 0.2 | 3.4 3.2 8.8 | ---------------|---------------------------|---------------------------| 5-2-2) With respect to the Weekly Combination: ================================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 176 | 1.3 0.1 -1.0 | 1.7 1.6 5.1 | emr 42 | 0.5 -0.7 -1.4 | 2.3 1.7 5.9 | esa 62 | -0.6 -0.3 -0.3 | 2.9 2.4 11.8 | gfz 187 | -0.8 0.1 -0.6 | 1.3 1.2 4.4 | jpl 118 | 0.7 0.5 0.6 | 1.7 2.2 8.1 | MIT 138 | 1.2 -0.1 -1.0 | 1.7 2.0 4.4 | ngs 146 | 0.2 -0.4 -0.1 | 2.5 3.8 8.3 | sio 166 | 0.1 -0.1 -0.5 | 1.6 2.2 6.4 | mit 240 | 0.5 0.2 -0.6 | 0.9 0.5 2.5 | ncl 167 | 0.7 -0.0 0.7 | 1.1 0.7 3.8 | ITR 83 | 0.5 -0.0 -2.0 | 3.3 3.4 9.3 | ---------------|---------------------------|---------------------------| 5-2-3) With respect to the Cumulative Combination: ===================================================== Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 166 | 0.5 0.3 -1.0 | 2.3 2.3 7.5 | emr 40 | -0.5 -0.2 -1.0 | 2.9 2.5 7.8 | esa 60 | -1.5 0.0 -0.9 | 3.7 3.1 12.0 | gfz 178 | -1.7 0.3 -0.1 | 2.5 2.2 7.1 | jpl 111 | -0.2 0.7 0.3 | 2.7 3.4 9.9 | MIT 130 | 0.4 0.1 -0.9 | 2.4 2.9 6.4 | ngs 142 | -0.7 -0.2 -0.2 | 3.2 4.9 10.3 | sio 158 | -0.8 0.1 -0.4 | 2.5 2.9 8.9 | mit 220 | -0.3 0.4 -0.5 | 2.0 2.0 6.0 | ncl 162 | -0.2 0.2 1.1 | 2.1 2.0 5.8 | igs 236 | -0.8 0.2 0.1 | 1.9 2.0 5.4 | ITR 86 | -0.5 -0.0 -0.9 | 1.8 1.9 5.6 | ---------------|---------------------------|---------------------------| 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 | -0.007 -0.008 -0.003 17.2 9.8 -0.4 2.92 | emr | -0.011 -0.022 -0.027 -3.3 12.5 -11.8 4.27 | esa | -0.004 -0.017 -0.001 2.2 8.0 1.3 1.37 | gfz | 0.050 -0.028 -0.012 -0.4 2.4 -3.7 2.11 | jpl | 0.110 -0.053 0.147 2.3 11.2 -3.3 1.44 | MIT | 0.003 -0.020 0.011 -0.3 10.2 -7.0 3.17 | ngs | 0.094 -0.122 -0.004 4.7 7.8 -18.0 3.57 | sio | -0.050 0.008 -0.015 5.4 0.3 18.6 -1.84 | mit | -0.005 0.023 -0.020 -1.1 -0.3 -0.8 2.52 | ncl | 0.005 -0.057 -0.007 0.5 0.6 -3.3 2.06 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 2.03 | ---------------|---------------------------------------------------------------| 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 | 0.075 0.073 0.082 1.9 1.9 1.9 0.30 | esa | 0.055 0.057 0.064 1.5 1.5 1.5 0.23 | gfz | 0.044 0.044 0.050 1.2 1.1 1.1 0.18 | jpl | 0.055 0.055 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 | 0.045 0.046 0.052 1.2 1.2 1.2 0.18 | ncl | 0.044 0.044 0.050 1.2 1.2 1.1 0.18 | igs | 0.000 0.000 0.000 0.0 0.0 0.0 1.90 | ---------------|---------------------------------------------------------------| 5-4) Geocenter: ==================== | X Y Z | s X s Y s Z | | (mm) (mm) (mm) | (mm) (mm) (mm) | ---------------|---------------------------|---------------------------| igs | 5.5 8.6 -0.2 | 3.5 3.5 5.0 | ---------------|---------------------------|---------------------------| 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 | --- -24.7 -2.2 --- -2.1 --- | emr | --- -14.6 1.1 0.4 -4.6 0.4 | esa | --- -25.6 4.3 --- -2.8 --- | gfz | --- 11.0 2.1 -0.9 3.8 5.7 | jpl | --- 12.3 -2.2 -4.0 2.5 -1.3 | MIT | --- 22.2 7.7 0.3 -3.5 1.1 | ngs | --- 5.5 2.3 13.0 2.8 2.3 | sio | --- -3.6 1.3 3.3 0.4 -0.7 | mit | --- 14.7 -3.8 -0.4 2.7 -0.5 | ncl | --- 16.4 0.8 --- 1.9 --- | ITR | --- --- --- --- --- --- | BuA | --- -10.1 -8.9 -1.6 26.8 2.0 | ---------------|------------------------------------------------------------| 5-5-2) STD : =============== Solution | UT LOD XPO XPOR YPO YPOR | | us us .01mas .01ma/d .01mas .01ma/d | ---------------|------------------------------------------------------------| cod | --- 4.2 2.2 --- 1.1 --- | emr | --- 6.3 3.0 12.8 2.3 8.9 | esa | --- 11.8 1.7 --- 3.8 --- | gfz | --- 10.2 2.4 6.8 3.0 15.2 | jpl | --- 9.2 2.4 10.2 3.2 11.4 | MIT | --- 5.6 3.6 8.6 2.2 7.2 | ngs | --- 17.3 6.1 41.6 9.6 15.0 | sio | --- 5.9 3.3 6.4 3.3 7.9 | mit | --- 2.8 0.9 1.9 1.1 4.0 | ncl | --- 1.3 1.6 --- 0.5 --- | ITR | --- --- --- --- --- --- | BuA | --- 16.6 8.5 9.8 6.5 15.7 | ---------------|------------------------------------------------------------| 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 cod13437.snx |OHI2 A ----| -10.0 14.9 -92.8| IGS03P33_RS99.snx cod13437.snx |URUM A ----| -0.2 -10.8 13.7| | | | IGS03P33_RS99.snx jpl13437.snx |OHI2 A ----| -7.2 10.3 -92.3| | | | IGS03P33_RS99.snx ngs13437.snx |OHI2 A ----| -6.8 12.2 -104.2| | | | IGS03P33_RS99.snx mit1343g.snx |OHI2 A ----| -10.3 11.5 -83.5| | | | IGS03P33_RS99.snx mit1343g.snx |JAB1 A ----| -11.7 4.2 1.8| | | | IGS03P33_RS99.snx ncl1343g.snx |OHI2 A ----| -9.7 10.8 -74.9| | | | IGS05P39.snx gfz13437.snx |CNMR A ----| -27.3 33.6 -11.2| | | | IGS05P39.snx gfz13437.snx |OHI2 A ----| -2.8 6.4 -66.2| | | | IGS05P39.snx MIT13437.snx |OHI2 A ----| -1.8 8.5 -64.7| | | | IGS05P39.snx ngs13437.snx |CNMR A ----| -19.7 48.5 -10.1| | | | IGS05P39.snx sio13437.snx |CNMR A ----| -22.9 33.8 -15.4| | | | IGS05P39.snx mit1343g.snx |CNMR A ----| -22.2 37.6 -12.7| | | | IGS05P39.snx ncl1343g.snx |CNMR A ----| -20.9 36.3 -8.6| -----------------------------------------|------------|-----------------------| 5-7) Conflicts: ==================== IERS DOMES NO MIT cod emr esa gfz jpl ngs sio IGS igs ============= ====== ====== ====== ====== ====== ====== ====== ====== ====== ====== 42202M005 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 TID1 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 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 40146S001 UNB1 A UNB1 A UNB1 A MISSING IERS DOMES NOS AT MIT: ----------------------------- HLFX A PALM A PUR3 A KYW1 A ELEN A UPO1 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 ============= ====== ====== ====== ====== 13407S014 MAD2 A 13407S012 MADR A MAD2 A MADR A MADR A MADR A 43001M002 THU2 A THU3 A THU3 A THU3 A 40451M123 GODZ A GODE A GODE A GODE A GODE A 50103M112 TID1 A 50103M108 TIDB A TID1 A TIDB A TIDB A TID2 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: ----------------------------- PALM A KOD1 A BISH A