From hutch at geod.nrcan.gc.ca Wed Dec 31 13:46:29 2003 From: hutch at geod.nrcan.gc.ca (David Hutchison) Date: Wed, 31 Dec 2003 16:46:29 -0500 (EST) Subject: [IGSREPORT-10904] Wk 1249 IGS SINEX Combination Message-ID: <200312312146.QAA18823@dgis.geod.nrcan.gc.ca> ****************************************************************************** IGS Electronic Report 31 Dec 13:46:31 PST 2003 Message Number 10904 ****************************************************************************** Author: R. Ferland , D. Hutchison =================================================================== Combined AC solution for GPS week 1249 - 03/12/14 to 03/12/20 =================================================================== 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 igs03P1249.snx Combined weekly solution. igs03P1249.erp Daily Earth Rotation Parameters. igs00p02.erp Daily Earth Rotation Parameters since GPS week 1013. IGS03P51.snx Cumulative Combined solution. igs03P1249.sum This file. igs03P1249.itr Residuals between the AC and the IGS00 for the RF stations. igs03P1249.res Residuals between the AC and the Combined Weekly solution. IGS03P51.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 IGS00 stations at the current epoch. ftp://igscb.jpl.nasa.gov/igscb/station/coord/IGS01P37_RS54.SNX.Z 3-4) The AC are compared to IGS00, 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 IGS00 of the current epoch using a 7-parameters transformation. The singular cumulative combined solution is aligned to the IGS00 of the reference epoch using a 14-parameters transformation and the 54 ITRF station positions and velocities. The IGS00 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 = IGS01P37_RS54.SNX igs = igs03P1249.snx IGS = IGS03P51.snx BuA = IERS Bulletin A gfz excluded from the geocenter estimation (Sec. 5-4). Solutions with manual station deletion: After unconstraining: esa RIOG SANT ngs KOKB 4-1) Starting with GPS week 1143, the solutions are aligned to the IGS01P37_RS54.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 | 160 | 35 | 28.332 | 0.994 | 28.152 | emr | 41 | 24 | 6.364 | 0.989 | 6.291 | esa | 57 | 38 | 6.177 | 0.985 | 6.084 | gfz | 175 | 41 | 10.817 | 0.992 | 10.733 | jpl | 110 | 28 | 5.214 | 0.919 | 4.793 | ngs | 79 | 43 | 24.377 | 1.088 | 26.511 | sio | 169 | 42 | 2.120 | 0.994 | 2.106 | igs | 227 | 44 | 1.187 | 1.024 | 1.216 | ---------------|-----|-----|---------------|---------------|---------------| 5-2) Solution Residuals weighted Average & STD : ===================================================== 5-2-1) With respect to the IGS00 stations: ============================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 35 | 1.4 0.5 -1.6 | 4.0 4.9 12.3 | emr 24 | 1.0 0.4 -0.1 | 2.6 3.2 10.8 | esa 38 | -0.4 0.6 0.2 | 3.6 4.4 12.8 | gfz 41 | 1.4 0.7 -0.3 | 3.7 4.6 10.0 | jpl 28 | 0.5 0.3 -0.2 | 3.6 3.5 10.2 | ngs 43 | -2.4 1.8 -0.9 | 7.7 9.5 13.9 | sio 42 | 0.1 0.9 0.3 | 3.8 5.2 8.0 | ---------------|---------------------------|---------------------------| 5-2-2) With respect to the Weekly Combination: ================================================= Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 155 | 0.5 0.6 -0.1 | 1.7 1.4 7.7 | emr 38 | 0.5 0.4 -2.0 | 2.1 1.8 8.1 | esa 56 | -1.5 -0.0 -1.5 | 1.7 1.8 10.0 | gfz 166 | 0.3 0.3 -1.1 | 1.1 1.4 4.3 | jpl 107 | -0.1 -0.2 -1.3 | 1.7 1.6 7.9 | ngs 75 | -2.7 0.4 0.4 | 5.8 6.6 13.1 | sio 154 | -0.5 0.3 0.1 | 1.4 2.7 4.7 | ITR 43 | -0.6 -0.9 0.3 | 3.7 3.9 9.1 | ---------------|---------------------------|---------------------------| 5-2-3) With respect to the Cumulative Combination: ===================================================== Solution | Weighted Average (mm) | STD (mm) | | N E U | N E U | ---------------|---------------------------|---------------------------| cod 128 | 0.7 0.5 -0.2 | 3.0 2.2 10.9 | emr 40 | 0.9 0.3 -2.5 | 2.7 2.4 10.6 | esa 56 | -1.1 0.0 -0.1 | 2.3 2.8 11.5 | gfz 156 | 0.2 0.2 -1.0 | 2.8 2.5 7.5 | jpl 97 | 0.1 -0.5 -0.4 | 2.4 2.2 9.7 | ngs 78 | -2.7 0.3 0.1 | 6.6 7.8 13.7 | sio 144 | -0.4 0.4 -0.5 | 2.6 3.7 6.9 | igs 174 | 0.1 0.0 -0.0 | 1.8 1.9 5.7 | ITR 54 | -0.7 -0.7 0.2 | 2.9 2.5 4.8 | ---------------|---------------------------|---------------------------| 5-3) 7-Parameters Transformation: AC ----> IGS01P37_RS54.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 | 0.011 0.003 -0.047 7.3 15.1 -30.1 1.16 | emr | 0.023 -0.007 -0.031 2.8 18.7 -18.6 3.29 | esa | 0.006 -0.082 -0.009 2.1 13.3 -7.3 2.11 | gfz | 0.032 -0.023 0.004 -1.3 1.1 -2.5 1.07 | jpl | 0.018 -0.003 -0.033 3.4 10.2 -7.1 0.54 | ngs | 0.094 -0.084 -0.026 2.9 14.2 -9.0 1.43 | sio | -0.008 -0.014 0.027 6.1 0.5 40.8 1.62 | ---------------|---------------------------------------------------------------| 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 | 0.067 0.067 0.076 1.7 1.7 1.7 0.27 | emr | 0.080 0.079 0.095 2.1 2.1 2.1 0.32 | esa | 0.065 0.066 0.075 1.7 1.7 1.7 0.26 | gfz | 0.061 0.062 0.071 1.6 1.6 1.6 0.25 | jpl | 0.075 0.072 0.087 1.9 1.9 1.9 0.30 | ngs | 0.060 0.061 0.069 1.6 1.6 1.6 0.24 | sio | 0.061 0.062 0.069 1.6 1.6 1.6 0.25 | ---------------|---------------------------------------------------------------| 5-4) Geocenter: ==================== | X Y Z | s X s Y s Z | | (mm) (mm) (mm) | (mm) (mm) (mm) | ---------------|---------------------------|---------------------------| igs | 3.0 8.3 -7.5 | 1.6 1.8 3.8 | ---------------|---------------------------|---------------------------| 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 | --- 2.6 1.7 --- -5.4 --- | emr | --- 10.1 -4.6 12.7 -6.6 -18.6 | esa | --- 17.1 1.7 --- 5.4 --- | gfz | --- -0.1 2.6 -11.5 1.1 -0.9 | jpl | --- 22.2 -0.9 21.8 -5.1 10.9 | ngs | --- -7.1 -23.7 --- 14.4 --- | sio | --- -21.6 -4.2 5.3 3.1 8.9 | ITR | --- --- --- --- --- --- | BuA | --- 12.1 -6.9 4.8 23.7 14.2 | ---------------|------------------------------------------------------------| 5-5-2) STD : =============== Solution | UT LOD XPO XPOR YPO YPOR | | us us .01mas .01ma/d .01mas .01ma/d | ---------------|------------------------------------------------------------| cod | --- 7.6 1.6 --- 1.9 --- | emr | --- 7.6 2.2 12.6 2.8 6.2 | esa | --- 10.4 3.6 --- 2.5 --- | gfz | --- 8.0 1.3 4.7 1.6 3.9 | jpl | --- 9.9 2.2 9.3 2.1 5.4 | ngs | --- 39.8 3.4 --- 7.3 --- | sio | --- 9.4 2.5 7.1 1.5 5.7 | ITR | --- --- --- --- --- --- | BuA | --- 13.7 3.2 7.7 3.8 7.0 | ---------------|------------------------------------------------------------| 5-6) Outliers: =================== Thresholds set at 5 sigmas and 50 mm. Solution Solution | Station | N E U | Minus |code id soln| (mm) (mm) (mm)| -----------------------------------------|------------|-----------------------| | | | IGS01P37_RS54.snx esa12497.snx |CHAT A ----| -3.3 -1.8 -68.0| | | | IGS01P37_RS54.snx gfz12497.snx |YAR1 A ----| -2.8 7.1 -37.2| | | | IGS01P37_RS54.snx sio12497.snx |MCM4 A ----| 1.6 2.1 39.5| | | | cod12497.snx jpl12497.snx |DWH1 A ----| 0.8 -0.8 -59.7| | | | esa12497.snx gfz12497.snx |KOKB A 2| -2.6 -4.1 -50.5| | | | IGS03P50.snx esa12497.snx |GOL2 A ----| 14.4 58.2 -4.9| | | | IGS03P50.snx esa12497.snx |FAIR A 2| -4.8 2.9 -50.1| | | | IGS03P50.snx jpl12497.snx |BOGT A 3| -2.8 1.9 42.1| | | | IGS03P50.snx igs03P1249.snx |ALRT A ----| -6.0 -2.9 1.4| IGS03P50.snx igs03P1249.snx |BOGT A 3| -1.0 1.0 40.5| IGS03P50.snx igs03P1249.snx |FAIR A 2| -0.9 -2.9 -19.3| IGS03P50.snx igs03P1249.snx |MAG0 A ----| 9.8 5.2 -0.6| IGS03P50.snx igs03P1249.snx |WHIT A ----| -10.1 -5.8 -11.6| IGS03P50.snx igs03P1249.snx |YSSK A ----| 11.6 -4.1 7.0| -----------------------------------------|------------|-----------------------| 5-7) Conflicts: =========================== 5-7-1) Station Name Conflicts: ============================= IERS DOMES NO cod emr esa gfz jpl ngs sio IGS igs ============= ====== ====== ====== ====== ====== ====== ====== ====== ====== 50134M001 DARR A DARW A DARW A DARW A DARW A DARW A DARW A 66010M001 DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAV1 A DAVR A DAVR A 40405S031 GOLD A GOL2 A GOLD A GOL2 A GOL2 A GOLD A GOLD A GOLD A 22306M002 IISC A IISC A IISC B IISC A IISC A IISC B IISC A IISC A IISC A 43005M001 KELY A KELY A KELY A KELY A KELY A KELY A KELY B 10422M001 KIR0 A KR0G A 30314M002 SUTH A SUTH B SUTH A SUTH A SUTH A SUTH A SUTH A 43001M002 THU2 A THU3 A THU3 A THU2 A THU3 A THU3 A 50103M108 TIDB A TID2 A TIDB A TID2 A TID2 A TID2 A TIDB A TIDB A TIDB A TID2 A TIDB A TIDB A 50107M004 YAR2 A YAR2 A YAR2 A YAR1 A YAR1 A YAR2 A 13407S012 MADR A MAD2 A MAD2 A MADR A MADR A MADR A 40400M007 JPLM A JPLM A JPLM A JPLM A MISSING IERS DOMES NOS AT gfz: ----------------------------- BISH A PMON A PALM A MISSING IERS DOMES NOS AT sio: ----------------------------- PUR2 A CONZ A OUSD A CNCL A KARA A MERS A CAVA A SFEL A VOLT A BRAS A MISSING IERS DOMES NOS AT IGS: ----------------------------- TALA A 5-7-2) Station Antenna Conflicts: ================================ _______________________ |Enforcing these aliases| |_______________________| GOLD A: GOL2 A IISC A: IISC B SUTH A: SUTH B MADR A: MAD2 A ABBREVIATIONS: ------------- L1: L1 Offset L2: L2 Offset ECC: Eccentricity -N: NORTH (Latitude) -E: EAST (Longitude) -U: UP (Vertical) Compare to file IGS.SNX (IGS). Antenna Conflicts in file esa12497.snx (esa). ------- --------- -- ---- STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) === ==== == ==== ==== ==== ==== ==== ==== ==== ==== ==== esa KIRU A .1081 .0003 -.0002 .1256 .0009 .0005 .0620 .0000 .0000 IGS KIRU A .1100 .0000 .0000 .1280 .0000 .0000 .0620 .0000 .0000 esa NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000 IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010 Antenna Conflicts in file gfz12497.snx (gfz). ------- --------- -- ---- STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) === ==== == ==== ==== ==== ==== ==== ==== ==== ==== ==== gfz BAY2 A .0920 -.0007 .0004 .0601 -.0001 -.0008 .0000 .0000 .0000 IGS BAY2 A .0877 -.0012 -.0008 .0598 .0009 -.0016 .0000 .0000 .0000 gfz NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000 IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010 gfz OBET A .2725 .0017 .0036 .2916 .0008 .0042 3.2470 .0000 .0000 IGS OBET A .2725 .0017 .0036 .2916 .0008 .0042 3.2470-5.264013.7960 Antenna Conflicts in file jpl12497.snx (jpl). ------- --------- -- ---- STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) === ==== == ==== ==== ==== ==== ==== ==== ==== ==== ==== jpl ALGO A .1100 .0000 .0000 .1280 .0000 .0000 .0820 .0000 .0000 IGS ALGO A .1100 .0000 .0000 .1280 .0000 .0000 .1000 .0000 .0000 jpl ASPA A .0729 -.0004 -.0010 .0750 -.0004 -.0013 -.0072 .0000 .0000 IGS ASPA A .0729 -.0004 -.0010 .0750 -.0004 -.0013 .0000 .0000 .0000 jpl CHAT A .1100 .0000 .0000 .1280 .0000 .0000 .0031 .0000 .0000 IGS CHAT A .1100 .0000 .0000 .1280 .0000 .0000 .0062 .0000 .0000 jpl CONZ A .1131 .0011 .0002 .1186 .0010 .0013 .0000 .0000 .0000 IGS CONZ A .1131 .0011 .0002 .1186 .0010 .0013 -.0125 .0000 .0000 jpl CRO1 A .1100 .0000 .0000 .1280 .0000 .0000 .0614 .0000 .0000 IGS CRO1 A .1100 .0000 .0000 .1280 .0000 .0000 .0814 .0000 .0000 jpl DARW A .1100 .0000 .0000 .1280 .0000 .0000 .0000 .0000 .0000 IGS DARW A .1100 .0000 .0000 .1280 .0000 .0000 .0025 .0000 .0000 jpl FAIR A .1100 .0000 .0000 .1280 .0000 .0000 .0840 .0000 .0000 IGS FAIR A .1100 .0000 .0000 .1280 .0000 .0000 .0863 .0000 .0000 jpl GLPS A .1100 .0000 .0000 .1280 .0000 .0000 .0000 .0000 .0000 IGS GLPS A .1100 .0000 .0000 .1280 .0000 .0000 .0083 .0000 .0000 jpl GUAO A .1100 .0000 .0000 .1280 .0000 .0000 .0000 .0000 .0000 IGS GUAO A .1100 .0000 .0000 .1280 .0000 .0000 .0800 .0000 .0000 jpl IISC A .1100 .0000 .0000 .1280 .0000 .0000 1.3138 .0000 .0000 IGS IISC A .1100 .0000 .0000 .1280 .0000 .0000 .0780 .0000 .0000 jpl KOU1 A .1131 .0011 .0002 .1186 .0010 .0013 .0000 .0000 .0000 IGS KOU1 A .1131 .0011 .0002 .1186 .0010 .0013 .1070 .0000 .0000 jpl KOUR A .1100 .0000 .0000 .1280 .0000 .0000 .1000 .0000 .0000 IGS KOUR A .1100 .0000 .0000 .1280 .0000 .0000 .0450 .0000 .0000 jpl KUUJ A .1100 .0000 .0000 .1280 .0000 .0000 .0000 .0000 .0000 IGS KUUJ A .1100 .0000 .0000 .1280 .0000 .0000 .1000 .0000 .0000 jpl LAE1 A .1100 .0000 .0000 .1280 .0000 .0000 .0500 .0000 .0000 IGS LAE1 A .1100 .0000 .0000 .1280 .0000 .0000 .0110 .0000 .0000 jpl LHAZ A .1080 -.0002 .0001 .1267 -.0003 .0002 .0031 .0000 .0000 IGS LHAZ A .1080 -.0002 .0001 .1267 -.0003 .0002 .1350 .0000 .0000 jpl MAC1 A .1100 .0000 .0000 .1280 .0000 .0000 .0675 .0000 .0000 IGS MAC1 A .1100 .0000 .0000 .1280 .0000 .0000 .0280 .0000 .0000 jpl MDVJ A .1131 .0011 .0002 .1186 .0010 .0013 .0000 .0000 .0000 IGS MDVJ A .1131 .0011 .0002 .1186 .0010 .0013 .1660 .0000 .0000 jpl NKLG A .1100 .0000 .0000 .1280 .0000 .0000 3.1000 .0000 .0000 IGS NKLG A .1100 .0000 .0000 .1280 .0000 .0000 3.1090 .0000 .0000 jpl NOUM A .0714 .0003 .0005 .0682 -.0004 .0001 .0059 .0000 .0000 IGS NOUM A .0714 .0003 .0005 .0682 -.0004 .0001 .0000 .0000 .0000 jpl NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000 IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010 jpl OHI2 A .1100 .0000 .0000 .1280 .0000 .0000 .0008 .0000 .0000 IGS OHI2 A .1100 .0000 .0000 .1280 .0000 .0000 -.0080 .0000 .0000 jpl OHI3 A .1080 -.0002 .0001 .1267 -.0003 .0002 -.0151 .0000 .0000 IGS OHI3 A .1080 -.0002 .0001 .1267 -.0003 .0002 .0050 .0000 .0000 jpl REYK A .1100 .0000 .0000 .1280 .0000 .0000 .0680 .0000 .0000 IGS REYK A .1100 .0000 .0000 .1280 .0000 .0000 .0555 .0000 .0000 jpl SIMO A .1100 .0000 .0000 .1280 .0000 .0000 .0000 .0000 .0000 IGS SIMO A .1100 .0000 .0000 .1280 .0000 .0000 .0520 .0000 .0000 jpl STJO A .1100 .0000 .0000 .1280 .0000 .0000 .1300 .0000 .0000 IGS STJO A .1100 .0000 .0000 .1280 .0000 .0000 .1000 .0000 .0000 jpl TNML A .1100 .0000 .0000 .1280 .0000 .0000 .0000 .0000 .0000 IGS TNML A .1100 .0000 .0000 .1280 .0000 .0000 1.5770 .0000 .0000 jpl WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3200 .0000 .0000 IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 -.0094 -.0022 jpl ZAMB A .1100 .0000 .0000 .1280 .0000 .0000 .0000 .0000 .0000 IGS ZAMB A .1100 .0000 .0000 .1280 .0000 .0000 .0540 .0000 .0000 Antenna Conflicts in file ngs12497.snx (ngs). ------- --------- -- ---- STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) === ==== == ==== ==== ==== ==== ==== ==== ==== ==== ==== ngs BAKO A .0757 .0000 .0000 .0745 .0000 .0000 1.6160 .0000 .0000 IGS BAKO A .0780 .0000 -.0030 .0744 -.0031 -.0013 1.6160 .0000 .0000 Antenna Conflicts in file sio12497.snx (sio). ------- --------- -- ---- STN L1-U L1-N L1-E L2-U L2-N L2-E ECC-U ECC-N ECC-E AGY CODE PT (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) (M.) === ==== == ==== ==== ==== ==== ==== ==== ==== ==== ==== sio CONZ A .0739 .0006 -.0014 .0767 .0010 -.0011 .0790 .0000 .0000 IGS CONZ A .1131 .0011 .0002 .1186 .0010 .0013 -.0125 .0000 .0000 sio NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0000 .0000 IGS NYAL A .0780 .0000 .0000 .0960 .0000 .0000 5.2160 .0040 -.0010 sio WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 .0000 .0000 IGS WUHN A .1100 .0000 .0000 .1280 .0000 .0000 2.3610 -.0094 -.0022 The following files have no antenna conflicts: - cod12497.snx (cod) - emr12497.snx (emr) -- David Hutchison Geodetic Survey of Canada Ottawa, Ontario, Canada Internet: hutch at geod.emr.ca