[IGSREPORT-19609] Wk 1627 IGS SINEX Combination

igs-rf at ign.fr igs-rf at ign.fr
Wed Mar 30 05:49:15 PDT 2011


 Authors: B. Garayt, P. Rebischung
 
 ===============================================================
  Combined AC solution for GPS week 1627 - 11/03/13 to 11/03/19
 ===============================================================
 
 1) Contacts:
 ============
 e-mail: igs-rf at ign.fr
 Tel:    0033143988197 (Bruno Garayt)
 Fax:    0033143988450
 
 2) Products:
 ============
 All products are available at:
   CDDIS: ftp://cddis.gsfc.nasa.gov/gps/products
   SOPAC: ftp://garner.ucsd.edu/pub/products
   IGN:   ftp://igs.ensg.eu/pub/igs/products
          ftp://igs.ign.fr/pub/igs/products
 
 igs11P1627.snx  Combined weekly solution
 igs11P1627.erp  Daily Earth Rotation Parameters
 igs11P1627.sum  This file
 igs11P1627.itr  Residuals between AC solutions and IGS05 for the RF stations
 igs11P1627.res  Residuals between AC solutions and combined weekly solution
 
 IGS11P11.snx    Cumulative combined solution
 IGS11P11.res    Residuals between AC solutions and cumulative solution
 igs00p03.erp    Daily Earth Rotation Parameters since GPS week 860
 
 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) Constrained AC solutions are unconstrained according to the information
      given in their SOLUTION/APRIORI blocks and then minimally constrained.
      AC solutions given in the form of a normal matrix (esa) are inverted by
      adding minimal constraints.
 3-4) The weekly AC solutions are combined. The 7-parameters singularity is
      avoided by using internal constraints. Iterations are performed until no
      residuals exceed 5 cm or 5 sigma.
 3-5) The combined solution is compared to IGS05 propagated at current week
      (datum). Some outliers may be removed from the datum. Finally, the
      combined solution is aligned to the datum using a 7-parameters
      transformation.
 3-6) The AC solutions NOT used in the combination are compared to the combined
      solution in order to identify and remove outliers.
 3-7) The weekly combined solution is added to the cumulative solution.
      Iterations are performed until no residuals exceed 3 cm or 3 sigma in the
      weekly solution.
 3-8) The updated cumulative solution is compared to IGS05 (datum). Some outliers
      may be removed from the datum. Finally, the cumulative solution is aligned
      to the datum using a 14-parameters transformation.
 
 4) Remarks:
 ===========
 
      mit = mit16277.snx
      mig = mit1627g.snx
 
      ITR = IGS05.snx
      igs = igs11P1627.snx
      IGS = IGS11P11.snx
 
      The following solutions are not used in the combination but only for
      comparison:
      mig ncl
 
      Solutions with manual station deletion:
          esa  DAV1
          jpl  FRDN DAV1
          mit  YARR
          sio  FLIN OUSD
 
      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.
 
      4-4) Starting with week 1598, the first iterative combinations are
           performed using AC solutions minimally constrained over the 7
           Helmert parameters. (Until week 1597, they were constrained over
           the 3 rotations only.) The final combination is however still
           performed with AC solutions minimally constrained in rotations only.
           The combination is hardly affected by this change except that it is
           now more sensitive to outliers.
 
 5) Results:
 ============
 
 5-1)      AC (Variance Factor)^0.5 estimates:
 =============================================
      At each iteration, the variance factor for solution s is estimated by :
      VF = (vs'*Ps*vs)/fs   with fs = nobss - tr(As*Q*As'*Ps)
                                 vs : residuals of solution s
                                 Ps : weight matrix of solution s
                                 nobss : number of observations of solution s
                                 As : design matrix of solution s
                                 Q : total covariance matrix
      This variance factor is used to rescale the covariance matrix of solution s
      for the next iteration.
 
      Another scale factor is computed for each solution s, by comparing it to
      the official cumulative solution of previous week (IGS) :
      SF = (vs'*Ps*vs)/(3*nstas)   with vs : residuals of the comparison
                                        Ps : weight matrix of solution s
                                        nstas : number of common stations
 
 Solution       |# sta| #RF |   Final VF    |       SF      |
 ---------------|-----|-----|---------------|---------------|
 cod            | 240 |  57 |         6.470 |        23.156 |
 emr            |  85 |  40 |         1.982 |         5.928 |
 esa            | 137 |  33 |         2.898 |         5.753 |
 gfz            | 196 |  52 |         4.894 |        20.123 |
 grg            | 131 |  43 |         5.523 |         9.815 |
 jpl            | 137 |  38 |         5.395 |         9.825 |
 mit            | 256 |  61 |         0.624 |         2.840 |
 ngs            | 213 |  57 |        15.509 |        57.420 |
 sio            | 286 |  53 |         0.783 |         3.153 |
 mig            | 464 |  60 |        ------ |         2.393 |
 ncl            | 204 |  62 |        ------ |         3.616 |
 igs            | 426 |  62 |        ------ |        ------ |
 ---------------|-----|-----|---------------|---------------|
 
 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         57 |    -0.5     -0.2     -0.4 |     3.5      4.1     11.5 |
 emr         40 |    -0.4     -0.0      0.0 |     3.7      3.9     10.4 |
 esa         33 |    -1.5     -0.5      0.0 |     4.1      4.5     14.6 |
 gfz         52 |    -0.6     -0.2     -0.4 |     3.7      3.9     11.4 |
 grg         43 |     0.3     -0.3     -1.1 |     4.1      4.7     13.3 |
 jpl         38 |    -0.9     -0.3     -0.6 |     3.6      4.4     12.1 |
 mit         61 |     0.2     -0.1     -0.4 |     3.3      4.3     11.3 |
 ngs         57 |    -0.4     -0.2      0.2 |     3.1      3.7     11.6 |
 sio         53 |    -0.2     -0.5     -0.7 |     3.8      4.2     11.0 |
 mig         60 |    -0.4     -0.1     -0.2 |     3.4      3.9     11.6 |
 ncl         62 |    -0.2     -0.2     -0.3 |     3.2      3.8     11.4 |
 ---------------|---------------------------|---------------------------|
 
 5-2-2)    With respect to the Weekly Combination:
 =================================================
 
 Solution       |  Weighted Average (mm)    |          STD (mm)         |
                |      N        E        U  |      N        E        U  |
 ---------------|---------------------------|---------------------------|
 cod        231 |     0.0      0.0     -0.0 |     1.0      0.6      2.8 |
 emr         85 |     0.4      0.0     -0.1 |     1.4      0.9      3.4 |
 esa        129 |    -0.2      0.1      0.2 |     2.6      1.4      5.3 |
 gfz        194 |    -0.6      0.0      0.0 |     0.6      0.8      2.7 |
 grg        129 |     1.1     -0.1     -0.2 |     2.8      1.8      5.9 |
 jpl        129 |    -0.5      0.1      0.1 |     1.6      2.4      5.2 |
 mit        243 |     0.2      0.0     -0.0 |     0.5      0.6      1.7 |
 ngs        207 |     0.3     -0.0      0.0 |     1.5      1.7      3.4 |
 sio        271 |     0.2     -0.0      0.0 |     1.6      0.9      2.4 |
 mig        406 |    -0.0      0.0     -0.1 |     0.2      0.2      0.7 |
 ncl        204 |     0.1      0.0      0.0 |     0.7      0.7      1.0 |
 ITR         62 |     0.3      0.1     -0.6 |     3.3      4.0     11.5 |
 ---------------|---------------------------|---------------------------|
 
 5-2-3)    With respect to the Cumulative Combination:
 =====================================================
 
 Solution       |  Weighted Average (mm)    |          STD (mm)         |
                |      N        E        U  |      N        E        U  |
 ---------------|---------------------------|---------------------------|
 cod        211 |    -0.3     -0.2     -0.1 |     2.0      1.9      6.2 |
 emr         83 |    -0.1     -0.0     -0.1 |     2.3      1.9      5.2 |
 esa        119 |    -0.5     -0.2      0.2 |     3.1      2.1      8.3 |
 gfz        188 |    -0.9     -0.1      0.0 |     2.1      2.9      5.8 |
 grg        127 |     0.7     -0.4     -0.3 |     3.2      2.5      7.4 |
 jpl        110 |    -1.0     -0.1     -0.0 |     2.7      3.3      7.7 |
 mit        235 |    -0.4     -0.3      0.0 |     2.0      2.7      5.4 |
 ngs        201 |    -0.2     -0.2      0.0 |     2.4      3.3      6.2 |
 sio        252 |    -0.4     -0.2      0.0 |     2.5      2.6      5.7 |
 mig        352 |    -0.6     -0.1     -0.1 |     2.0      2.5      5.6 |
 ncl        199 |    -0.4     -0.3     -0.1 |     2.2      2.9      5.4 |
 igs        367 |    -0.6     -0.1     -0.1 |     1.9      2.5      5.5 |
 ITR        115 |    -0.9     -0.1     -0.1 |     3.3      3.8     13.5 |
 ---------------|---------------------------|---------------------------|
 
 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    0.010   -0.018     -0.7      0.8      0.8     0.20 |
 emr            |   0.027   -0.009    0.039     -2.6      5.0      8.0     0.41 |
 esa            |   0.125   -0.056    0.021      3.0      6.4     -8.9     0.18 |
 gfz            |   0.049   -0.025    0.356     -4.7     -5.3      0.1     0.48 |
 grg            |   0.041    0.032   -0.078     -2.4      3.8      4.8     0.41 |
 jpl            |   0.052   -0.038    0.052      1.1      4.8      5.8     0.14 |
 mit            |  -0.003   -0.025   -0.035      5.0     -3.4     -3.7     0.34 |
 ngs            |  -0.033   -0.002    0.018     -0.4     -2.5     -1.3     0.28 |
 sio            |   0.124   -0.081    0.017      2.8      6.3      0.4     0.58 |
 mig            |  -0.014    0.015   -0.039     -0.2      2.1      0.3     0.33 |
 ncl            |   0.023    0.019   -0.010     -1.7      0.7     -0.0     0.30 |
 igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.34 |
 ---------------|---------------------------------------------------------------|
 
 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            |   0.040    0.041    0.046      1.1      1.1      1.0     0.16 |
 emr            |   0.044    0.047    0.053      1.2      1.2      1.2     0.18 |
 esa            |   0.064    0.066    0.081      1.7      1.7      1.7     0.27 |
 gfz            |   0.043    0.044    0.047      1.1      1.1      1.1     0.17 |
 grg            |   0.051    0.054    0.061      1.4      1.4      1.4     0.22 |
 jpl            |   0.049    0.052    0.059      1.3      1.3      1.3     0.21 |
 mit            |   0.040    0.040    0.045      1.0      1.0      1.0     0.16 |
 ngs            |   0.040    0.042    0.046      1.1      1.1      1.1     0.17 |
 sio            |   0.040    0.041    0.046      1.1      1.1      1.0     0.16 |
 mig            |   0.037    0.038    0.042      1.0      1.0      1.0     0.15 |
 ncl            |   0.038    0.039    0.043      1.0      1.0      1.0     0.15 |
 igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.14 |
 ---------------|---------------------------------------------------------------|
 
 5-4)      Geocenter:
 ====================
 
                |      X        Y        Z  |    s X      s Y      s Z  |
                |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
 ---------------|---------------------------|---------------------------|
 igs            |     0.7      2.2     -1.1 |     1.6      1.3      3.2 |
 ---------------|---------------------------|---------------------------|
 
 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            |     ---       -2.2       1.2      -1.3       0.7      18.1 |
 esa            |     ---       -5.7      -8.1      16.6      -2.7     -22.4 |
 gfz            |     ---       -3.5      -3.7       0.9      -0.3     -29.6 |
 grg            |     ---        ---      -0.2       9.7      -3.1       4.7 |
 jpl            |     ---        3.8       1.3      21.5      -3.6      25.7 |
 mit            |     ---        1.1       1.7      -9.3       0.7       8.4 |
 ngs            |     ---       -7.2      -1.4       5.4      -3.3     -12.8 |
 sio            |     ---       27.9      -0.0      15.2       0.6       1.1 |
 mig            |     ---       20.5      -1.8      17.4      -1.8       1.8 |
 ncl            |     ---        ---       ---       ---       ---       --- |
 BuA            |     ---       -7.2      -8.3      20.6       2.2      10.1 |
 ---------------|------------------------------------------------------------|
 
 5-5-2)    STD:
 ==============
 
 Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
                |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
 ---------------|------------------------------------------------------------|
 cod            |     ---        ---       ---       ---       ---       --- |
 emr            |     ---        2.2       3.7       3.3       3.1      14.5 |
 esa            |     ---        4.8       1.9      10.3       2.0       5.3 |
 gfz            |     ---        3.7       2.6       6.6       2.7      12.9 |
 grg            |     ---        ---       3.5      11.9       5.0      10.6 |
 jpl            |     ---        9.4       0.8      11.6       2.7      15.5 |
 mit            |     ---        2.4       0.6       3.1       0.7       4.7 |
 ngs            |     ---        2.4       3.4      10.6       2.0      10.9 |
 sio            |     ---        3.6       1.3       3.6       0.4       4.9 |
 mig            |     ---        2.2       1.1       3.3       0.5       4.7 |
 ncl            |     ---        ---       ---       ---       ---       --- |
 BuA            |     ---        9.6       3.9      12.1       6.7       8.6 |
 ---------------|------------------------------------------------------------|
 
 5-6)      Satellite Antenna Offset Residuals weighted Average & STD:
 ====================================================================
      No Satellite phase center ... 
 
 5-7)      Outliers:
 ===================
      Outliers may be rejected at different stages of the processing:
        - During the combination (stage 3-4)), outliers may be removed from the
          weekly AC solutions. Thresholds are set to 5 cm and 5 sigma.
        - During stage 3-6), outliers may be removed from the AC solutions NOT
          included in the combination. Thresholds are set to 5 cm and 5 sigma.
        - During the stacking of the weekly combined solution on the cumulative
          solution (stage 3-7)), outliers may be removed from the weekly
          solution. Thresholds are set to 3 cm and 8 sigma.
 
 Solution         Stage of rejection      |  Station   |    N       E       U  |
                                          |code id soln|   (mm)    (mm)    (mm)|
 -----------------------------------------|------------|-----------------------|
                                          |            |                       |
 esa16277.snx     Combination: Iter. 1    |CHPI  A    1|   -1.1     6.8    -4.3|
 esa16277.snx     Combination: Iter. 1    |HOB2  A    2|   -7.7    -0.0    -2.8|
 esa16277.snx     Combination: Iter. 1    |KOUC  A    2|   -7.5    -0.7    -6.3|
 esa16277.snx     Combination: Iter. 1    |REYK  A    4|    5.7    -2.4     8.5|
 esa16277.snx     Combination: Iter. 1    |TSKB  A    4|   -2.0    13.4    -3.2|
 gfz16277.snx     Combination: Iter. 1    |CRAR  A    1|   -1.1     0.4   -14.7|
 grg16277.snx     Combination: Iter. 1    |NOVM  A    1|   41.9    -1.6    31.9|
 grg16277.snx     Combination: Iter. 1    |STR1  A    1|   -7.2    -0.0    61.7|
 jpl16277.snx     Combination: Iter. 1    |BRMU  A    3|    0.7    10.1   -14.5|
 mit16277.snx     Combination: Iter. 1    |ISPA  A    1|    0.0    -2.7    -0.2|
 mit16277.snx     Combination: Iter. 1    |MTKA  A    2|    0.3    -4.2    -5.5|
 sio16277.snx     Combination: Iter. 1    |BRFT  A    3|    3.9    -0.2    -0.1|
 sio16277.snx     Combination: Iter. 1    |OHI2  A    1|    4.4     0.7    -1.0|
 sio16277.snx     Combination: Iter. 1    |CRO1  A    1|    3.1     0.1     2.6|
 sio16277.snx     Combination: Iter. 1    |SANT  A    4|    4.5     1.1    -0.1|
 sio16277.snx     Combination: Iter. 1    |CRAR  A    1|    0.2    -0.6    12.7|
 sio16277.snx     Combination: Iter. 1    |TSKB  A    4|   -0.6    -3.5     3.3|
 esa16277.snx     Combination: Iter. 2    |DGAV  A    1|   -5.4    -2.0     0.5|
 sio16277.snx     Combination: Iter. 2    |WHIT  A    1|   -2.4     0.5    -3.3|
                                          |            |                       |
 mit1627g.snx     Comp. to igs11P1627.snx |YARR  A    1|   -1.7    -1.0    -5.3|
                                          |            |                       |
 igs11P1627.snx   Stacking:    Iter. 1    |SIO3  A   12|   11.8   -27.2    -4.6|
 igs11P1627.snx   Stacking:    Iter. 2    |NRC1  A    1|    1.8     7.1     0.8|
                                          |            |                       |
 -----------------------------------------|------------|-----------------------|
 
 6) Check of metadata in AC solutions:
 =====================================
 
      Starting with week 1585, receivers, antennas and eccentricities reported in
      AC solutions are checked versus station logs. Station logs are gathered
      from the following sources:
 
      igs         ftp://igscb.jpl.nasa.gov/pub/station/log
      igsp        ftp://igscb.jpl.nasa.gov/pub/station/pendinglogs
      epn         ftp://epncb.oma.be/pub/station/log
      cors        ftp://www.ngs.noaa.gov/cors/station_log
      unavco      ftp://data-out.unavco.org/pub/logs
      rgp         ftp://rgpdata.ign.fr/pub/logsheet
      argn        ftp://ftp.ga.gov.au/geodesy-outgoing/gnss/logs
      rbmc        ftp://geoftp.ibge.gov.br/RBMC/dados/log
      ucsd        ftp://garner.ucsd.edu/pub/docs/site_logs
 
 6-1)      Receivers:
 ====================
 
  AC | Station |    Used Receiver     |  Receiver from log   | Source |
 ----|---------|----------------------|----------------------|--------|
 jpl | AUCK  A | TRIMBLE NETRS        | TRIMBLE NETR9        | igs    |
 jpl | BAKE  A | AOA BENCHMARK ACT    | TPS NETG3            | igs    |
 cod | BAKO  A | LEICA GRX1200+GNSS   | LEICA GRX1200GGPRO   | igs    |
 jpl | BJAB  A | -------------------- | TRIMBLE NETR5        | cors   |
 jpl | BJCO  A | -------------------- | TRIMBLE NETR5        | igs    |
 jpl | BJFS  A | ASHTECH Z-XII3       | TRIMBLE NETR8        | igs    |
 jpl | BJNA  A | -------------------- | TRIMBLE NETR5        | cors   |
 mit | BRAZ  A | NOV OEMV3            | TRIMBLE NETRS        | igs    |
 jpl | BRMU  A | TRIMBLE 5700         | LEICA GRX1200GGPRO   | igs    |
 jpl | BSMK  A | -------------------- | TRIMBLE NETR5        | cors   |
 jpl | CABL  A | -------------------- | TRIMBLE NETRS        | cors   |
 jpl | CHUR  A | AOA SNR-8000 ACT     | TPS NETG3            | igs    |
 jpl | DUM1  A | -------------------- | ASHTECH Z-XII3       | igs    |
 jpl | EDOC  A | -------------------- | TRIMBLE NETRS        | cors   |
 cod | FRDN  A | TPS NETG3            | AOA BENCHMARK ACT    | igsp   |
 esa | GODE  A | JPS EGGDT            | ASHTECH UZ-12        | igs    |
 jpl | HAMM  A | -------------------- | TRIMBLE NETRS        | cors   |
 jpl | IQAL  A | -------------------- | TPS NETG3            | igs    |
 jpl | ISBS  A | -------------------- | TRIMBLE NETR5        | cors   |
 jpl | ISKU  A | -------------------- | TRIMBLE NETR5        | cors   |
 jpl | KARR  A | ASHTECH UZ-12        | TRIMBLE NETR8        | igs    |
 mit | KARR  A | ASHTECH UZ-12        | TRIMBLE NETR8        | igs    |
 jpl | KOUC  A | TRIMBLE NETRS        | TRIMBLE NETR5        | igs    |
 jpl | KUUJ  A | AOA BENCHMARK ACT    | TPS NETG3            | igs    |
 esa | LAMA  A | LEICA GRX1200GGPRO   | LEICA GRX1200+GNSS   | igs    |
 mit | MAC1  A | TRIMBLE NETR5        | ASHTECH UZ-12        | igs    |
 mit | MAJU  A | TRIMBLE R7           | ASHTECH UZ-12        | argn   |
 jpl | MAWY  A | -------------------- | TRIMBLE NETRS        | cors   |
 jpl | MOIU  A | -------------------- | ASHTECH UZ-12        | unavco |
 mit | NETT  A | TRIMBLE NETRS        | TRIMBLE 4000SSI      | ucsd   |
 jpl | PBOC  A | -------------------- | TRIMBLE NETRS        | cors   |
 jpl | POMM  A | -------------------- | TRIMBLE NETRS        | unavco |
 ngs | PSU1  A | TRIMBLE 4700         | TRIMBLE 5700         | cors   |
 jpl | SCH2  A | AOA BENCHMARK ACT    | TPS NETG3            | igs    |
 jpl | SLAI  A | -------------------- | TRIMBLE 4000SSI      | cors   |
 jpl | SMST  A | -------------------- | TRIMBLE 5700         | igsp   |
 jpl | STJO  A | AOA BENCHMARK ACT    | AOA SNR-8000 ACT     | igs    |
 jpl | THTI  A | ASHTECH UZ-12        | TRIMBLE NETR8        | igs    |
 esa | THU3  A | JPS LEGACY           | ASHTECH UZ-12        | igs    |
 jpl | TIDB  A | ASHTECH Z-XII3       | ASHTECH UZ-12        | igs    |
 jpl | TIXI  A | ASHTECH Z-XII3       | JPS EGGDT            | igs    |
 jpl | TMGO  A | -------------------- | TRIMBLE NETR5        | cors   |
 jpl | TSEA  A | -------------------- | LEICA GRX1200GGPRO   | cors   |
 sio | YOSH  A | LEICA GRX1200GGPRO   | -------------------- | ucsd   |
 ----|---------|----------------------|----------------------|--------|
 
 6-2)      Antennas:
 ===================
 
  AC | Station |     Used Antenna     |   Antenna from log   | Source |
 ----|---------|----------------------|----------------------|--------|
 grg | AREQ  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 jpl | AREQ  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 grg | ARTU  A | ASH700936D_M    NONE | ASH700936D_M    DOME | igs    |
 jpl | ARTU  A | ASH700936D_M    NONE | ASH700936D_M    DOME | igs    |
 emr | CAS1  A | AOAD/M_T        DOME | AOAD/M_T        AUST | igs    |
 grg | CAS1  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 jpl | CAS1  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 emr | CEDU  A | AOAD/M_T        DOME | AOAD/M_T        AUST | igs    |
 grg | CEDU  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 jpl | CEDU  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 emr | CONZ  A | TPSCR3_GGD      DOME | TPSCR3_GGD      CONE | igs    |
 mit | COT1  A | ASH700936E      UNKN | ASH700936E      NONE | cors   |
 grg | CRO1  A | ASH701945G_M    NONE | ASH701945G_M    JPLA | igs    |
 jpl | CRO1  A | ASH701945G_M    NONE | ASH701945G_M    JPLA | igs    |
 emr | DAV1  A | LEIAR25.R3      DOME | LEIAR25.R3      LEIT | igs    |
 grg | EPRT  A | TRM29659.00     NONE | TRM29659.00     LEIS | igs    |
 jpl | EPRT  A | TRM29659.00     NONE | TRM29659.00     LEIS | igs    |
 grg | FAIR  A | ASH701945G_M    NONE | ASH701945G_M    JPLA | igs    |
 jpl | FAIR  A | ASH701945G_M    NONE | ASH701945G_M    JPLA | igs    |
 cod | FRDN  A | TPSCR.G3        NONE | AOAD/M_T        NONE | igsp   |
 jpl | GUAM  A | ASH701945B_M    NONE | ASH701945B_M    JPLA | igs    |
 jpl | HARV  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 emr | HOFN  A | TPSCR3_GGD      DOME | TPSCR3_GGD      CONE | igs    |
 emr | KOUC  A | TRM57971.00     DOME | TRM57971.00     TZGD | igs    |
 grg | KOUC  A | TRM57971.00     NONE | TRM57971.00     TZGD | igs    |
 jpl | KOUC  A | TRM57971.00     NONE | TRM57971.00     TZGD | igs    |
 grg | KR0G  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 grg | LHAZ  A | ASH701941.B     NONE | ASH701941.B     SNOW | igs    |
 emr | MAC1  A | AOAD/M_T        DOME | AOAD/M_T        AUST | igs    |
 jpl | MAC1  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 mit | MAC1  A | AOAD/M_T        DOME | AOAD/M_T        AUST | igs    |
 grg | MAR6  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 jpl | MAR6  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 emr | MAW1  A | AOAD/M_T        DOME | AOAD/M_T        AUST | igs    |
 grg | MAW1  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 jpl | MAW1  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 grg | MCIL  A | TRM29659.00     NONE | TRM29659.00     DOME | igs    |
 grg | MCM4  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 jpl | MCM4  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 grg | MDO1  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 jpl | MDO1  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 mit | NETP  A | TRM55971.00     NONE | TRM57971.00     NONE | cors   |
 mit | NETT  A | TRM55971.00     NONE | TRM29659.00     SCIS | ucsd   |
 grg | NRMD  A | TRM57971.00     NONE | TRM57971.00     TZGD | igs    |
 jpl | NVSK  A | TRM33429.00+GP  NONE | TRM33429.00+GP  DOME | igs    |
 grg | NYAL  A | AOAD/M_B        NONE | AOAD/M_B        DOME | igs    |
 jpl | NYAL  A | AOAD/M_B        NONE | AOAD/M_B        DOME | igs    |
 emr | OHI2  A | TPSCR.G3        DOME | TPSCR.G3        TPSH | igs    |
 grg | ONSA  A | AOAD/M_B        NONE | AOAD/M_B        OSOD | igs    |
 jpl | PETS  A | ASH701933B_M    NONE | ASH701933B_M    SCIS | igs    |
 sio | REDU  A | ASH701945C_M    UNKN | ASH701945C_M    NONE | igsp   |
 grg | SANT  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 grg | SCOR  A | ASH701941.B     NONE | ASH701941.B     SCIS | igs    |
 cod | SMST  A | TRM41249.00     TZGD | TRM41249.00     DOME | igsp   |
 jpl | SMST  A | TRM41249.00     NONE | TRM41249.00     DOME | igsp   |
 grg | SPT0  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 grg | SYOG  A | AOAD/M_T        NONE | AOAD/M_T        DOME | igs    |
 grg | THU3  A | ASH701073.1     NONE | ASH701073.1     SCIS | igs    |
 jpl | THU3  A | ASH701073.1     NONE | ASH701073.1     SCIS | igs    |
 jpl | TIDB  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 emr | TOW2  A | AOAD/M_T        DOME | AOAD/M_T        AUST | igs    |
 grg | TOW2  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 jpl | TOW2  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 emr | VESL  A | TRM29659.00     DOME | TRM29659.00     TCWD | igs    |
 grg | VIS0  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 jpl | VIS0  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 jpl | WILL  A | AOAD/M_T        NONE | AOAD/M_T        EMRA | igs    |
 grg | WSRT  A | AOAD/M_T        NONE | AOAD/M_T        DUTD | igs    |
 jpl | XIAN  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 jpl | YAKT  A | ASH701933B_M    NONE | ASH701933B_M    SCIS | igs    |
 jpl | YSSK  A | ASH701933B_M    NONE | ASH701933B_M    DOME | igs    |
 ----|---------|----------------------|----------------------|--------|
 
 6-3)      Eccentricities:
 =========================
 
  AC | Station |    Used Eccentricity    |  Eccentricity from log  | Source |
 ----|---------|-------------------------|-------------------------|--------|
 mit | NETT  A |  0.0550  0.0000  0.0000 |  0.0031  0.0000  0.0000 | ucsd   |
 ----|---------|-------------------------|-------------------------|--------|



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