[IGSREPORT-20756] Wk 1682 IGS SINEX Combination

igs-rf at ign.fr igs-rf at ign.fr
Thu Apr 19 00:40:16 PDT 2012


 Authors: A. Duret, B. Garayt, P. Rebischung
 
 ================================================================================
  Combination of AC solutions for GPS week 1682 - 12/04/01 to 12/04/07
 ================================================================================
 
 1) Contacts:
 ============
 e-mail: igs-rf at ign.fr
 Tel:    0033143988197 (Bruno Garayt)
 Fax:    0033143988450
 
 2) Products:
 ============
 Products are available at:
   CDDIS: ftp://cddis.gsfc.nasa.gov/gps/products
   SOPAC: ftp://garner.ucsd.edu/pub/products
   ENSG:  ftp://igs.ensg.eu/pub/igs/products
   IGN:   ftp://igs.ign.fr/pub/igs/products
 
 igs12P1682.snx  Combined weekly solution
 igs12P1682.erp  Daily Earth Rotation Parameters
 igs12P1682.sum  This file
 igs12P1682.itr  Residuals between AC solutions and IGS08 for the RF stations
 igs12P1682.res  Residuals between AC solutions and combined weekly solution
 
 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 name 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 are inverted by adding
      minimal constraints.
 3-4) The weekly AC solutions are combined. The 7-parameter singularity is
      avoided by using internal constraints. Iterations are performed until no
      residuals exceed 2 cm or 5 sigma.
 3-5) The combined solution is compared to IGS08 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-parameter
      transformation estimated using the IGS08 core network.
 3-6) The AC solutions NOT used in the combination are compared to the combined
      solution in order to identify and remove outliers.
 
 4) Remarks:
 ===========
 
      mit = mit16827.snx
      mig = mit1682g.snx
 
      ITR = IGS08.snx
      igs = igs12P1682.snx (weekly combined solution)
      IGS = IGS12P14.snx   (cumulative solution)
 
      The following solutions are not used in the combination but only for
      comparison:
      mig ncl
 
      Solutions with manual station deletion:
          gfz  CRAR
          grg  KOUC NRMD NOVM
          mit  CORB MAJU
          ngs  CHIN
          sio  NEIA RWSN LPGS CRAR CANT
          jpl  OBE3 0194 LPGS
          mig  NEIA 0194 SAMO TONG LAUT CRAR KATZ KABR ELAT TELA MALL
 
 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.
 
 Solution       |# sta| #RF |#core|   Final VF    |
 ---------------|-----|-----|-----|---------------|
 cod            | 258 |  93 |  51 |         8.161 |
 emr            |  81 |  53 |  47 |         2.042 |
 esa            | 173 |  74 |  47 |         1.801 |
 gfz            | 192 | 100 |  53 |         7.354 |
 grg            | 124 |  78 |  51 |         2.990 |
 mit            | 256 |  94 |  52 |         1.073 |
 ngs            | 226 | 105 |  55 |        15.812 |
 sio            | 286 | 119 |  49 |         1.348 |
 jpl            | 166 |  79 |  50 |         2.488 |
 mig            | 538 | 135 |  57 |        ------ |
 ncl            | 222 | 121 |  56 |        ------ |
 igs            | 475 | 135 |  57 |        ------ |
 ---------------|-----|-----|-----|---------------|
 
 5-2)      Solution Residuals weighted Average & STD:
 ====================================================
 
 5-2-1)    With respect to the IGS08 stations:
 =============================================
 
 Solution       |  Weighted Average (mm)    |          STD (mm)         |
                |      N        E        U  |      N        E        U  |
 ---------------|---------------------------|---------------------------|
 cod         93 |     0.5      0.0      0.1 |     3.1      2.7      7.9 |
 emr         53 |     1.0     -0.3      0.2 |     2.7      3.1      8.7 |
 esa         74 |     0.9     -0.0     -0.4 |     3.8      3.3      8.6 |
 gfz        100 |     0.4      0.0     -0.2 |     3.6      2.9      9.3 |
 grg         78 |     0.3     -0.1      0.3 |     3.5      3.1      8.3 |
 mit         94 |    -0.1      0.1     -0.1 |     3.4      3.2      8.2 |
 ngs        105 |    -0.0      0.1      0.1 |     3.0      3.0      8.1 |
 sio        119 |    -0.0      0.0      0.9 |     3.5      4.2     10.7 |
 jpl         79 |     0.6     -0.0     -0.0 |     3.4      3.0     10.5 |
 mig        135 |    -0.3      0.2      0.1 |     3.1      3.2      8.3 |
 ncl        121 |     0.1     -0.1     -0.1 |     3.3      3.0      8.4 |
 ---------------|---------------------------|---------------------------|
 
 5-2-2)    With respect to the Weekly Combination:
 =================================================
 
 Solution       |  Weighted Average (mm)    |          STD (mm)         |
                |      N        E        U  |      N        E        U  |
 ---------------|---------------------------|---------------------------|
 cod        252 |    -0.2     -0.1     -0.1 |     1.1      0.8      3.0 |
 emr         81 |     0.6     -0.1     -0.0 |     1.2      0.8      3.3 |
 esa        170 |     0.2      0.0     -0.1 |     1.0      0.8      3.5 |
 gfz        190 |     0.0      0.1      0.0 |     0.9      1.0      2.6 |
 grg        120 |     0.1     -0.0      0.1 |     1.5      1.2      3.8 |
 mit        232 |    -0.0      0.0     -0.2 |     1.1      0.9      2.6 |
 ngs        220 |    -0.0      0.0      0.0 |     1.1      1.7      2.9 |
 sio        269 |    -0.5     -0.1      0.5 |     1.5      1.8      5.8 |
 jpl        159 |     0.2      0.0     -0.1 |     1.1      1.2      4.3 |
 mig        465 |    -0.3     -0.0     -0.1 |     0.3      0.4      1.2 |
 ncl        220 |    -0.2     -0.0      0.4 |     1.2      1.1      3.0 |
 ITR        135 |    -0.1     -0.1     -0.1 |     3.1      3.2      8.4 |
 ---------------|---------------------------|---------------------------|
 
 5-2-3)    With respect to the Cumulative Combination:
 =====================================================
 
 Solution       |  Weighted Average (mm)    |          STD (mm)         |
                |      N        E        U  |      N        E        U  |
 ---------------|---------------------------|---------------------------|
 cod        229 |     0.3      0.0     -0.0 |     2.2      2.1      5.3 |
 emr         80 |     0.8     -0.1      0.1 |     1.9      2.0      6.2 |
 esa        166 |     0.8      0.1     -0.1 |     2.4      2.1      6.1 |
 gfz        189 |     0.5      0.2     -0.0 |     2.3      2.1      5.6 |
 grg        120 |     0.7      0.1      0.2 |     2.6      2.1      6.6 |
 mit        224 |     0.4      0.1     -0.2 |     2.0      2.2      5.8 |
 ngs        215 |     0.3      0.1      0.1 |     1.9      2.2      5.2 |
 sio        259 |    -0.2      0.0      0.8 |     2.7      3.0      8.6 |
 jpl        137 |     0.4      0.1      0.1 |     2.1      2.1      7.4 |
 mig        409 |     0.0      0.0     -0.1 |     2.2      2.3      5.9 |
 ncl        217 |     0.2      0.1      0.5 |     2.4      2.1      5.7 |
 igs        418 |     0.2      0.0      0.1 |     2.1      2.0      5.3 |
 ITR        173 |    -0.0     -0.1      0.0 |     2.4      2.8      4.9 |
 ---------------|---------------------------|---------------------------|
 
 5-3)      7-Parameters Transformation: AC ----> IGS08
 =====================================================
      These transformation parameters are estimated using the IGS08 core stations
      available in the AC solutions.
 
 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            |  -0.037   -0.019    0.021      0.7      0.5     -0.8     0.14 |
 emr            |  -0.003    0.004    0.009     -0.9     -7.5     11.9     0.46 |
 esa            |  -0.044   -0.071    0.111      2.2     -2.9      8.7     0.33 |
 gfz            |  -0.064    0.006   -0.027     -0.4      0.6     -0.6     0.10 |
 grg            |  -0.051    0.048   -0.034      2.1     -6.7     11.5     0.21 |
 mit            |  -0.045    0.033   -0.057      5.7     -6.0     11.3     0.45 |
 ngs            |  -0.073   -0.004    0.018      4.3     -4.8     14.7     0.43 |
 sio            |  -0.076   -0.003    0.131     -4.1     -4.8      7.8     0.61 |
 jpl            |  -0.010   -0.030    0.042     -3.2     -2.1      6.3     0.43 |
 mig            |  -0.040    0.028   -0.065     -0.9     -0.5      0.3     0.32 |
 ncl            |  -0.038    0.014    0.022     -0.9     -0.1     -1.6     0.36 |
 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            |   0.030    0.033    0.034      0.8      0.8      0.8     0.13 |
 emr            |   0.032    0.034    0.037      0.9      0.9      0.9     0.13 |
 esa            |   0.032    0.036    0.037      0.9      0.9      0.9     0.14 |
 gfz            |   0.032    0.035    0.036      0.9      0.9      0.9     0.13 |
 grg            |   0.029    0.032    0.034      0.8      0.8      0.8     0.12 |
 mit            |   0.030    0.033    0.034      0.8      0.8      0.8     0.13 |
 ngs            |   0.028    0.030    0.032      0.8      0.7      0.7     0.12 |
 sio            |   0.040    0.043    0.044      1.1      1.1      1.1     0.16 |
 jpl            |   0.035    0.037    0.041      0.9      0.9      0.9     0.15 |
 mig            |   0.027    0.030    0.032      0.7      0.7      0.7     0.12 |
 ncl            |   0.028    0.030    0.032      0.8      0.8      0.8     0.12 |
 igs            |   0.000    0.000    0.000      0.0      0.0      0.0     0.16 |
 ---------------|---------------------------------------------------------------|
 
 5-4)      Geocenter:
 ====================
 
                |      X        Y        Z  |    s X      s Y      s Z  |
                |    (mm)     (mm)     (mm) |    (mm)     (mm)     (mm) |
 ---------------|---------------------------|---------------------------|
 igs            |     0.8     -3.5      9.6 |     0.4      0.4      0.6 |
 ---------------|---------------------------|---------------------------|
 
 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            |     ---      -11.5       2.1      -0.2       3.3      21.8 |
 esa            |     ---        8.9       0.2      -4.8      -0.1      17.1 |
 gfz            |     ---        6.5       0.5      10.8      -2.4      -9.7 |
 grg            |     ---        ---      -0.6       5.8      -0.7      -5.3 |
 mit            |     ---       -4.5       2.1     -13.6      -0.9      -4.4 |
 ngs            |     ---       -0.1      -5.0      -2.9       0.3      -9.7 |
 sio            |     ---      -23.2       2.4     -50.7       7.9      -6.3 |
 jpl            |     ---      -10.3      -0.3       6.1      -0.9       3.5 |
 mig            |     ---       31.0       2.8     -38.4       6.1      -3.8 |
 ncl            |     ---        ---       ---       ---       ---       --- |
 BuA            |     ---        3.1      -8.0       4.5       1.4       1.8 |
 ---------------|------------------------------------------------------------|
 
 5-5-2)    STD:
 ==============
 
 Solution       |      UT       LOD       XPO      XPOR       YPO      YPOR  |
                |      us        us    .01mas    .01ma/d   .01mas    .01ma/d |
 ---------------|------------------------------------------------------------|
 cod            |     ---        ---       ---       ---       ---       --- |
 emr            |     ---        9.5       1.7       7.8       2.1      13.2 |
 esa            |     ---       12.2       0.9       5.9       0.9      10.8 |
 gfz            |     ---       12.2       1.3       6.2       1.0      13.9 |
 grg            |     ---        ---       1.0       8.2       1.8       5.5 |
 mit            |     ---        9.2       0.7       3.4       1.0       3.2 |
 ngs            |     ---        0.3       5.9      14.3       6.9      13.9 |
 sio            |     ---        8.7       1.3       6.5       1.5       6.8 |
 jpl            |     ---       10.3       1.0       4.0       1.3       5.9 |
 mig            |     ---        8.9       1.3       5.8       1.7       6.6 |
 ncl            |     ---        ---       ---       ---       ---       --- |
 BuA            |     ---       14.4       4.4       9.0       3.0       4.9 |
 ---------------|------------------------------------------------------------|
 
 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 2 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 2 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)|
 -----------------------------------------|------------|-----------------------|
                                          |            |                       |
 esa16827.snx     Combination: Iter. 1    |ULAB  A    3|    7.4     0.9     1.6|
 grg16827.snx     Combination: Iter. 1    |POTS  A    3|    8.1     3.7    -2.5|
 sio16827.snx     Combination: Iter. 1    |SANT  A    5|   -0.1    -0.3    19.5|
                                          |            |                       |
 mit1682g.snx     Comp. to igs12P1682.snx |ULAB  A    3|    0.3     2.9     1.4|
 ncl1682g.snx     Comp. to igs12P1682.snx |NOVM  A    1|   -1.5    45.1    38.4|
 ncl1682g.snx     Comp. to igs12P1682.snx |POTS  A    3|    4.3    10.2    -4.5|
                                          |            |                       |
 igs12P1682.snx   Stacking:    Iter. 1    |ALRT  A    1|    4.7     8.2    10.3|
 igs12P1682.snx   Stacking:    Iter. 1    |CTWN  A    2|    1.1    -1.6    49.4|
 igs12P1682.snx   Stacking:    Iter. 1    |RESO  A    1|   -7.7    -1.5     5.3|
 igs12P1682.snx   Stacking:    Iter. 1    |SMST  A    2|   -5.6     4.7    85.7|
 igs12P1682.snx   Stacking:    Iter. 1    |TWTF  A    2|    8.9     0.5     0.2|
                                          |            |                       |
 -----------------------------------------|------------|-----------------------|
 
 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
      igsf        ftp://igscb.jpl.nasa.gov/pub/station/oldlog
      epn         ftp://epncb.oma.be/pub/station/log
      rgp         ftp://rgpdata.ign.fr/pub/logsheet
      cors        ftp://www.ngs.noaa.gov/cors/station_log
      argn        ftp://ftp.ga.gov.au/geodesy-outgoing/gnss/logs
      nrcan       ftp://rtopsdata.geod.nrcan.gc.ca/pub/gps/stations_log
      sirgas      ftp://ftp.sirgas.org/pub/gps/DGF/station/log
      rbmc        ftp://geoftp.ibge.gov.br/RBMC/dados/log
      unavco      ftp://data-out.unavco.org/pub/logs
      ucsd        ftp://garner.ucsd.edu/pub/docs/site_logs
      ign         ftp://igs.ign.fr/pub/igs/igscb/station/log
 
 6-1)      Receivers:
 ====================
 
  AC | Station |    Used Receiver     |  Receiver from log   | Source |
 ----|---------|----------------------|----------------------|--------|
 jpl | ABMF  A | TRIMBLE NETR5        | TRIMBLE NETR9        | igs    |
 gfz | BIS2  A | AOA BENCHMARK ACT    | ASHTECH Z-XII3       | cors   |
 jpl | CCJ2  A | TRIMBLE NETRS        | TRIMBLE NETR9        | igs    |
 jpl | COCO  A | TRIMBLE NETR5        | TRIMBLE NETR8        | igs    |
 mit | COLA  A | TRIMBLE NETR5        | TRIMBLE NETR9        | cors   |
 sio | DGAV  A | JPS EGGDT            | JAVAD TRE_G3TH DELTA | igs    |
 emr | DRAO  A | AOA SNR-8000 ACT     | TRIMBLE NETR8        | igs    |
 esa | DRAO  A | AOA SNR-8000 ACT     | TRIMBLE NETR8        | igs    |
 gfz | DRAO  A | AOA SNR-8000 ACT     | TRIMBLE NETR8        | igs    |
 grg | DRAO  A | AOA SNR-8000 ACT     | TRIMBLE NETR8        | igs    |
 ngs | DRAO  A | AOA SNR-8000 ACT     | TRIMBLE NETR8        | igs    |
 sio | DRAO  A | AOA SNR-8000 ACT     | TRIMBLE NETR8        | igs    |
 mit | ELRO  A | TPS NET-G3A          | LEICA RS500          | ucsd   |
 jpl | GMSD  A | NOV OEMV3-RT2        | TRIMBLE NETR9        | igs    |
 jpl | GOLD  A | ASHTECH Z-XII3       | JPS EGGDT            | igs    |
 jpl | MORP  A | TRIMBLE NETRS        | TRIMBLE NETR8        | igs    |
 mit | NETT  A | TRIMBLE NETRS        | TRIMBLE 4000SSI      | ucsd   |
 sio | OHI3  A | LEICA GRX1200GGPRO   | LEICA GRX1200+GNSS   | igs    |
 mit | SIO5  A | TPS NET-G3A          | ASHTECH Z-XII3       | cors   |
 sio | SPT0  A | JPS E_GGD            | JAVAD TRE_G3TH DELTA | igs    |
 jpl | STK2  A | TRIMBLE 5700         | TRIMBLE NETR9        | igs    |
 cod | TABV  A | JAVAD TRE_G3TH DELTA | JPS EGGDT            | jpl    |
 jpl | ULAB  A | AOA SNR-8000 ACT     | JAVAD TRE_G3TH DELTA | igs    |
 mit | YRCM  A | LEICA SR530          | LEICA RS500          | ucsd   |
 jpl | ZAMB  A | ROGUE SNR-8000       | ASHTECH Z-XII3       | igs    |
 mit | ZAMB  A | ROGUE SNR-8000       | ASHTECH Z-XII3       | igs    |
 sio | ZAMB  A | ROGUE SNR-8000       | ASHTECH Z-XII3       | igs    |
 ----|---------|----------------------|----------------------|--------|
 
 6-2)      Antennas:
 ===================
 
  AC | Station |     Used Antenna     |   Antenna from log   | Source |
 ----|---------|----------------------|----------------------|--------|
 mit | ALON  A | LEIAT504        SNOW | LEIAT504        LEIS | ucsd   |
 grg | AREQ  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 jpl | AREQ  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 mit | AREQ  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 sio | 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    |
 gfz | BIS2  A | AOAD/M_T        NONE | ASH700829.3     SNOW | cors   |
 grg | CAS1  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 jpl | CAS1  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 jpl | CCJ2  A | TRM29659.00     SCIS | TRM59800.00     SCIS | igs    |
 grg | CEDU  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 mit | CONO  A | TRM33429.20+GP  UNKN | TRM33429.20+GP  NONE | cors   |
 mit | COVX  A | TRM55971.00     NONE | TRM57971.00     NONE | cors   |
 grg | CRO1  A | ASH701945G_M    NONE | ASH701945G_M    JPLA | igs    |
 jpl | CRO1  A | ASH701945G_M    NONE | ASH701945G_M    JPLA | igs    |
 mit | CSAR  A | TRM29659.00     SNOW | TRM29659.00     NONE | ucsd   |
 grg | FAIR  A | ASH701945G_M    NONE | ASH701945G_M    JPLA | igs    |
 jpl | FAIR  A | ASH701945G_M    NONE | ASH701945G_M    JPLA | igs    |
 jpl | GUAM  A | ASH701945B_M    NONE | ASH701945B_M    JPLA | igs    |
 mit | HILB  A | TRM33429.00+GP  UNKN | TRM33429.00+GP  NONE | cors   |
 jpl | ISCO  A | TRM57971.00     NONE | TRM57971.00     SCIT | sirgas |
 grg | KIR0  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 jpl | KIR0  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 jpl | KIRI  A | ASH701945C_M    SCIS | TRM59800.00     NONE | argn   |
 jpl | KOUC  A | TRM57971.00     NONE | TRM57971.00     TZGD | igs    |
 grg | LHAZ  A | ASH701941.B     NONE | ASH701941.B     SNOW | igs    |
 jpl | MAC1  A | AOAD/M_T        NONE | AOAD/M_T        AUST | igs    |
 grg | MAR6  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | 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    |
 grg | MTKA  A | ASH701073.1     NONE | ASH701073.1     SNOW | igs    |
 mit | NETT  A | TRM55971.00     NONE | TRM29659.00     SCIS | ucsd   |
 jpl | NVSK  A | TRM33429.00+GP  NONE | TRM33429.00+GP  DOME | igs    |
 grg | NYAL  A | AOAD/M_B        NONE | AOAD/M_B        DOME | igs    |
 grg | ONSA  A | AOAD/M_B        NONE | AOAD/M_B        OSOD | igs    |
 jpl | ONSA  A | AOAD/M_B        NONE | AOAD/M_B        OSOD | igs    |
 jpl | PETS  A | ASH701933B_M    NONE | ASH701933B_M    SCIS | igs    |
 grg | SANT  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 jpl | SHAO  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 jpl | SKE0  A | ASH701945C_M    NONE | ASH701945C_M    OSOD | epn    |
 mit | SNFD  A | TRM33429.20+GP  UNKN | TRM33429.20+GP  NONE | cors   |
 grg | SPT0  A | AOAD/M_T        NONE | AOAD/M_T        OSOD | igs    |
 grg | SYOG  A | AOAD/M_T        NONE | AOAD/M_T        DOME | igs    |
 jpl | SYOG  A | AOAD/M_T        NONE | AOAD/M_T        DOME | igs    |
 cod | TABV  A | TPSCR.G3        SCIS | ASH700936A_M    SNOW | jpl    |
 jpl | THU2  A | ASH701073.1     NONE | ASH701073.1     SCIS | igs    |
 grg | THU3  A | ASH701073.1     NONE | ASH701073.1     SCIS | igs    |
 jpl | TIDB  A | AOAD/M_T        NONE | AOAD/M_T        JPLA | igs    |
 sio | VBCA  A | LEIAT303        UNKN | LEIAT303        NONE | sirgas |
 grg | 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 | YAKT  A | ASH701933B_M    NONE | ASH701933B_M    SCIS | igs    |
 mit | YRCM  A | LEIAT504        SNOW | LEIAT504        LEIS | ucsd   |
 ----|---------|----------------------|----------------------|--------|
 
 6-3)      Eccentricities:
 =========================
 
  AC | Station |    Used Eccentricity    |  Eccentricity from log  | Source |
 ----|---------|-------------------------|-------------------------|--------|
 ----|---------|-------------------------|-------------------------|--------|
 
 6-4)      No station logs found for:
 ====================================
 
 CRAR  A 66001M004
 CTWN  A      M   
 JASK  A 20414M001
 JOGJ  A 23109M001
 LPIL  A 92732S001
 MCCJ  A      M   
 OBE3  A 14208M005
 TIXG  A 12360M001
 TLLG  A 13630M001
 UNB3  A 40146M002
 



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