Subject: [IGSREPORT-3914] Wk 0911 JPL Analysis Report
From: D C Jefferson
Date: Tue, 8 Jul 1997 16:24:24 PDT

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IGS Electronic Report    Tue Jul  8 16:24:24 PDT 1997      Message Number 3914
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Author: D C Jefferson
Subject: Wk 0911 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0911 (DAYS 173-179, DATES 1997 Jun 22 - Jun 28)
******************************************************************************

Submitted by the JPL IGS/FLINN Analysis Team:

J F Zumberge, D C Jefferson, M B Heflin, M M Watkins, F H Webb

all at the Jet Propulsion Laboratory, California Institute of Technology, 
Pasadena, CA  91109.

Files listed below are available in Unix compressed format and can be
retrieved using anonymous ftp to sideshow.jpl.nasa.gov (128.149.70.41),
directory pub/jpligsac/0911.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09117.sum         This text file.
jpl09117.erp         Earth rotation parameters for GPS week 911.
jpl09117.snx         Ground station coordinates for GPS week 911, SINEX format.
jpl0911[0-6].sp3     GPS ephemerides for GPS week 911, sp3 format.
jpl0911[0-6].tro     Ground station troposphere estimates for GPS week 911.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 13.0 cm

A large clock discontinuity of about 1.4 microseconds was detected for ALGO
at approximately 00:10 UT on day 180.  Hence, this site was not used as a
reference clock for this nor the previous day (179).  Similarly, a
discontinuity of about 400 microseconds was found for GPS22 at approximately
23:05 on day 178; no action was taken in this instance.

IGS Mail No. 1629 confirms the change in the location of the antenna at HART.
The "new" site is designated as HARK, and beginning this week, we add it as
as a candidate station for global processing.  As with other sites, this
station is given the opportunity to participate in the orbit and clock solution 
as the global site distribution varies.  We do not treat this site as a
fiducial, and the following nominal coordinates were assumed:

                                    X (m)          Y (m)          Z (m)
HARK (Pretoria, South Africa)   5084625.4495   2670366.5902  -2768493.9530

Due to potential problems, data from stations mentioned below were not
considered for use in the global solution for the day indicated.  (For
geographical reasons, they may not have been used in any case.)

WARNING: NLIB (not ALGO) used as reference clock day 179.
WARNING: Data from CASA, LHAS, SANT, SPK1 excluded day 176.
WARNING: Data from CASA, LHAS, SANT excluded day 177.
WARNING: Data from CASA, HFLK, KELY, LHAS, MDO1, SNI1 excluded day 178.
WARNING: Data from CASA, CSN1, HFLK excluded day 179.

In the following table, UT1R-UTC are the integrated values based on estimated
LODR values in the adjacent column.  See IGS Report No. 1498 (jpl07827.sum)
for details:

JPL ERP TABLE                                GPS week 911 (1997 Jun 22 - Jun 28)
     MJD  XPole  Ypole UT1R-UTC  LODR Xsig Ysig UTsig LODsig Nr Nf Nt  Xrt  Yrt 
            10**-5"      usec    us/d  10**-5"    us   us/d            10**-5"/d
50621.50  -1493  53304  -460421  1121    3    3     8      8 37 11 25  463  133 
50622.50  -1076  53341  -461556  1148    3    3     8      8 37 11 25  423  108 
50623.50   -669  53376  -462674  1088    3    3     8      8 37 11 25  403  123 
50624.50   -308  53435  -463739  1043    3    4     8      8 37  9 25  383  121 
50625.50     80  53493  -464780  1039    3    4     8      8 36  9 25  390   90 
50626.50    459  53521  -465836  1072    3    3     8      8 37 10 25  417   88 
50627.50    857  53550  -466880  1016    4    3     8      8 37 10 25  406   59 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 911:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 911 (1997 Jun 22 - Jun 28)
      97  6 22   97  6 23   97  6 24   97  6 25   97  6 26   97  6 27   97  6 28
prn   3d rss (cm)
  1      10         12         11          7         13          8          6   
  2      16          9          8          8         13         12         10   
  3      16         13         18         12         11         14         14   
  4       9         13         14         10         13          8         13   
  5      24         29         39         19         17         23         41   
  6      26         18         23         34         20         27         19   
  7      17         15         17         18         31         24         15   
  9      12         16         26         14         14          8         10   
 10       8         10         23         14         17         19          8   
 14      16         16         19          9         10          7          8   
 15       9         16         12          7         12         10         11   
 16      13         11         18         13          5          6          4   
 17      13         12         13         14         23         29         17   
 18       7         12         11         16         10          8         10   
 19      12          9         16         14         10          9         13   
 21      14         15         14         16         13         16         11   
 22      11         12         13         10         16         14         24   
 23      13         14         10          9         12         14         10   
 24       7          8         13          6         10         20         20   
 25      13         15         11         11         11         10          7   
 26       8          8          6          6         13         15         15   
 27       8          7          6          9          5          8          9   
 29      10         14         16          8          9          6          7   
 30      22         23         21         20         17         16         16   
 31      10         10         10          6          8          9         10   
_______________________
END ORBIT REPEATABILITY TABLE

The following table statistically summarizes this week's "engineering data", as
described in IGS Report No. 1528:

JPL ENGINEERING DATA SUMMARY TABLE           GPS week 911 (1997 Jun 22 - Jun 28)
 receiver/transmitter (dot means point positioned, * means fiducial site)
 |     days analyzed
 |     |      rms clock noise (ns)
 |     |      |           average clock solution (us)
 |     |      |           |           rms pseudorange (cm)
 |     |      |           |           |   (dot means pcode not analyzed)
 |     |      |           |           |           rms phase (mm)
 |     |      |           |           |           |           average arc (hr)
 |     |      |           |           |           |           |
 |___  |__    |_______    |_______    |___        |___        |__
ALBH   1.0    3.48       -64.5        39.0        5.00        3.20    
ALGO*  7.0    358.       -2.17        48.0        5.50        2.99    
AREQ   2.0    99.7       -1.11        37.5        5.00        2.36    
ASC1   6.0    80.9       -1.44        61.3        5.35        1.71    
BAHR   7.0    .678        128.        53.6        5.31        3.79    
BRAZ    .9    101.       -1.24        51.0        5.00        2.38    
CAS1   6.9    16.4        .346e+04    40.2        5.89        2.18    
CHAT   7.0    104.       -1.40        78.1        5.30        2.62    
COCO   4.9    .719e+06   -.565e+04    34.6        7.53        3.29    
CRO1   7.0    341.       -1.41        49.5        6.59        2.09    
DGAR   4.7    .207e+04   -1.96        54.8        6.22        1.82    
FAIR*  7.0    .621       -.944        57.9        5.59        2.33    
FLIN   1.0    89.5       -.897        49.0        5.00        2.84    
FORT   4.6    459.       -.233        49.8        6.44        3.02    
GOL2*  2.7    31.6       -.752        57.0        4.40        2.23    
GUAM   7.0    116.       -1.40        74.8        8.01        2.43    
HARV   3.0    .874e+07    .150e+05    69.0        5.00        2.73    
IISC   1.8    78.3       -.861        67.5        6.52        2.47    
IRKT   6.8    17.6       -1.49        67.6        5.04        2.31    
KERG   7.0    141.       -4.55          .         5.73        2.47    
KIT3   5.8    135.       -1.49        54.4        5.17        2.76    
KOKB*  6.7    75.6       -1.37        71.1        6.48        1.78    
KOSG*  7.0    10.1       -22.7        43.5        4.46        2.57    
KWJ1   7.0    102.       -1.39        55.2        7.02        1.68    
LHAS   4.0    93.2       -1.59        46.3        5.00        1.73    
MAC1   6.8    83.9       -1.39        30.8        4.04        2.34    
MAD2   2.9    248.       -1.46        98.8        6.00        2.03    
MADR*  6.7    .215       -1.21          .         6.53        2.34    
MALI   7.0    20.7       -516.          .         9.30        2.35    
MAS1   4.0    113.       -1.58        42.3        4.53        2.16    
MCM4   7.0    100.       -1.39        32.2        4.31        1.89    
MDO1   1.0    12.5       -1.00        35.0        6.00        2.72    
MDVO   2.9    .400e+05    298.        70.0        7.00        1.88    
MKEA   6.0    .901e-01   -1.67        41.3        5.35        2.64    
MOIN   7.0    96.1       -1.40        62.3        6.77        1.92    
NLIB   1.0    .           .           58.0        5.00        2.64    
PERT   7.0    2.64       -4.32        54.7        5.34        2.71    
REYK   6.0    80.0       -1.49        56.5        6.17        2.22    
SANT*  4.5    .199e+04   -2.75        35.9        5.65        1.46    
STJO   1.0    3.01       -.963        40.0        4.00        2.95    
TAHI   6.9    133.       -1.41        73.5        5.89        2.06    
THU1   6.9    76.6       -1.40        45.6        5.14        2.44    
TID2*  6.9    .161       -1.43        37.3        5.15        2.81    
TOUL   4.0    .560       -1.65        62.9        5.27        2.78    
USUD   7.0    .929       -.330        37.9        5.62        2.65    
WTZR*  6.9    .513       -1.96        60.2        5.00        2.57    
WUHN   4.9    7.94       -.504e+04    48.6        6.06        2.94    
YAR1*  7.0    6.77        3.87          .         4.34        2.37    
YELL*  7.0    52.0       -1.74        43.4        4.73        1.80    
PRN01  7.0    79.3        21.2        56.0        6.01        2.19    
PRN02  7.0    81.8       -378.        58.2        5.60        2.35    
PRN03  7.0    80.7        25.1        56.0        5.87        2.45    
PRN04  6.8    81.3        32.4        53.4        6.00        2.16    
PRN05  6.8    79.9        99.7        54.6        5.45        2.36    
PRN06  6.8    82.2       -1.50        53.4        6.16        2.32    
PRN07  6.9    81.6        747.        58.1        5.87        2.13    
PRN09  6.9    82.5       -3.26        55.2        5.87        2.26    
PRN10  6.8    82.0        8.33        56.5        6.00        2.32    
PRN14  6.9    84.5        18.4        55.1        5.76        2.29    
PRN15  7.0    3.47        438.        54.3        5.73        1.99    
PRN16  6.9    80.9        15.7        55.9        5.59        2.38    
PRN17  7.0    84.0       -153.        54.2        5.87        2.21    
PRN18  7.0    79.1        .596e-01    49.2        5.87        2.47    
PRN19  7.0    80.9        54.5        53.0        5.87        2.18    
PRN21  6.9    81.7        61.4        54.5        6.00        2.34    
PRN22  6.4    .243e+05    380.        51.5        5.64        2.35    
PRN23  6.9    82.6       -.505        55.2        6.00        2.49    
PRN24  6.8    82.0        596.        54.9        5.87        2.11    
PRN25  7.0    80.8       -6.96        52.2        6.00        2.20    
PRN26  7.0    82.5       -198.        54.9        5.87        2.47    
PRN27  7.0    79.8        31.9        51.1        6.00        2.36    
PRN29  7.0    81.2        143.        54.2        5.15        2.69    
PRN30  6.7    80.8       -65.3        54.7        5.45        2.37    
PRN31  7.0    81.0        448.        54.2        5.73        2.34    
_______________________
END ENGINEERING DATA SUMMARY TABLE

As described in IGS Mail Message 37, the following table compares the JPL
precise ephemerides with those from the broadcast ephemeris:

JPL COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
      97  6 22   97  6 23   97  6 24   97  6 25   97  6 26   97  6 27   97  6 28
prn   3d rss (cm)
  1     451        311        260        262        250        238        248   
  2     544        325        516        253        443        341        422   
  3     474        422        309        322        293        299        281   
  4    1094        711        428        403        963        481        453   
  5     590        646        540        494        444        583        630   
  6     583        754        914        759        670        567        810   
  7     506        236        450        324        267        493       1190   
  9     433        241        263        281        502        186        511   
 10     388        382        435        414        396        411        692   
 14     591        438        573        514        822        757        395   
 15     308        372        317        418        324        370        267   
 16     479        379        534        431        327        533        584   
 17     271        405        318        306        437        336        303   
 18     463        588        589        877        762        463        363   
 19     200        245        312        443        191        417        218   
 21     406        344        274        392        394        513        465   
 22     520        570        543        455        457        411        582   
 23    1196       1112        990        618        694        579        488   
 24     483        681        405        401        372        450        487   
 25     647        650        692        495        470        478        650   
 26     204        225        349        194        232        544       1015   
 27     239        334        495        429        313        388        335   
 29     356        352        438        666        886        548        645   
 30     386        245        449        518        350        156        246   
 31     284        309        253        297        706        668        410   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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