Subject: [IGSREPORT-4128] Wk 0921 JPL Analysis Report
From: D C Jefferson
Date: Fri, 12 Sep 1997 16:35:08 PDT

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IGS Electronic Report    Fri Sep 12 16:35:08 PDT 1997      Message Number 4128
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Author: D C Jefferson
Subject: Wk 0921 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0921 (DAYS 243-249, DATES 1997 Aug 31 - Sep 06)
******************************************************************************

Submitted by the JPL IGS/FLINN Analysis Team:

J F Zumberge, Y E Bar-Sever, 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/0921.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09217.sum         This text file.
jpl09217.erp         Earth rotation parameters for GPS week 921.
jpl09217.snx         Ground station coordinates for GPS week 921, SINEX format.
jpl0921[0-6].sp3     GPS ephemerides for GPS week 921, sp3 format.
jpl0921[0-6].tro     Ground station troposphere estimates for GPS week 921.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 10.0 cm

Although used in each day's analysis, we continue to deweight data from PRN13.
This satellite does not appear in any of the orbit products for this week.

Beginning this week we add two new candidate stations, SELE and SOFI.  As with
other sites, these stations are given the opportunity to participate in the
orbit and clock solution as the global site distribution varies.  The following
nominal coordinates were assumed:
                                        X (m)          Y (m)          Z (m)
HNPT (Cambridge MD, USA)            1196626.4857  -4846358.5654   3956723.1234
PIN2 (Pinyon Flats2 CA, USA)       -2369466.5035  -4761231.7315   3511396.7120
ROCH (Pinemeadow CA, USA)          -2382183.3937  -4755085.3075   3511367.8757
WSRT (Westerbork, The Netherlands)  3828736.2583    443304.8819   5064884.9859

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: FAIR (not ALGO) used as reference clock days 243 and 244.
WARNING: Data from PRN13 deweighted the entire GPS week 921.
WARNING: Data from CAGL, CAT1, TAIW excluded day 243.
WARNING: Data from CAGL, TAIW excluded day 244.
WARNING: Data from CAGL, TAIW, TIDB excluded day 245.
WARNING: Data from DGAR, TRAK excluded day 246.
WARNING: Data from KOUR, PIN1, SIO3 excluded day 247.
WARNING: Data from CSN1, SIO3 excluded day 248.
WARNING: Data from CRO1, CSN1, SIO3, SNI1 excluded day 249.

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 921 (1997 Aug 31 - Sep 06)
     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
50691.50  19364  45691   445696  1617    3    4     8      8 37  9 26  216 -183 
50692.50  19626  45541   444068  1639    3    4     8      8 37  9 26  214 -130 
50693.50  19887  45359   442391  1715    3    4     8      8 37 10 26  263 -185 
50694.50  20189  45173   440699  1669    4    4     9      9 37  9 26  220 -192 
50695.50  20416  44995   439033  1664    4    4     9      9 37  9 26  204 -217 
50696.50  20581  44747   437386  1630    4    4     8      8 37  9 26  146 -240 
50697.50  20739  44502   435744  1654    3    3     9      9 37  9 26  160 -288 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 921:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 921 (1997 Aug 31 - Sep 06)
      97  8 31   97  9  1   97  9  2   97  9  3   97  9  4   97  9  5   97  9  6
prn   3d rss (cm)
  1       8          8          8         11          8          7          7   
  2       5          7          7          9          7          8          6   
  3      14         16         14         21         21         34         24   
  4      12         10          8          8          9          8          7   
  5       6          6          7          6          7          8          8   
  6      12          9         13          8         11         10         10   
  7       9          8          6          9         11          7          5   
  9      10         10          8          9          9          8         12   
 10      19         24         11         18         19         14          9   
 13     152        129        104        105         53         49         71   
 14      14          6          8         14         40         44          4   
 15       7          9         12         10         11         13          8   
 16      16         11          8          6          9          6          6   
 17      16         16          8         17         29         16         14   
 18      10          7         13         23          8         15          9   
 19      12         12         21         17         17         13          9   
 21       8         10          6          8         14         10         14   
 22      13          8         10         15         10          7         10   
 23      15         15         32         14         24         24         27   
 24      27          7         15         12          6         10         10   
 25       5          8          9         15         16         12          6   
 26       5         15         11         21         27         16         11   
 27       5         12          9          9         16         10          4   
 29       7          9          9          6         11         14          5   
 30       5          7          7          9         13          7          6   
 31       9          8         10         11         13         14         18   
_______________________
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 921 (1997 Aug 31 - Sep 06)
 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)
 |     |      |           |           |           |           |
 |___  |__    |_______    |_______    |___        |___        |__
ALGO*  7.2    .111        .115        47.3        5.05        3.09    
ANKR   4.9    132.       -.507        52.9        4.87        3.03    
AREQ   7.0    95.6       -.537        43.9        4.16        2.27    
ASC1   1.6    120.       -.619        69.3        5.00        1.73    
BAHR   7.0    .452        127.        62.5        5.67        3.95    
BRAZ   5.0    165.       -.453        62.6        5.00        3.08    
BRMU   4.0    123.       -.482        39.8        6.26        2.93    
BRUS   3.0    .196        .126e-01    60.7        5.35        2.82    
CAS1   3.8    5.31        175.        45.6        5.52        1.56    
CASA   3.0    16.5        225.        39.7        5.69        2.84    
CHAT   7.0    114.       -.546        77.6        5.16        2.52    
CRO1   6.0    162.       -.495        51.7        5.87        2.14    
DGAR   3.0    157.       -.309        65.7        5.69        1.67    
FAIR*  7.0    .228       -.422        33.6        4.76        2.31    
FLIN   7.0    83.4       -.536        49.1        4.94        2.70    
FORT   7.0    .260e+04    14.1        47.3        5.30        2.96    
GODE   1.0    .153       -.411        46.0        6.00        2.72    
GOL2*  7.0    .284       -.630e-01    51.4        5.30        2.17    
GUAM   6.9    118.       -.546        64.0        7.17        2.13    
HARK    .9    37.8       -.998        53.0        5.00        2.85    
HBRK   1.0    .289e+06    495.        51.0        6.00        2.87    
HKLO   4.9    .289e+06    511.        51.4        6.22        2.33    
IISC    .9    84.8       -.229        74.0        6.00        2.26    
IRKT   6.8    2.55       -.543        62.9        5.00        2.12    
KELY   1.3    .798e+05   -.951          .         5.00        1.75    
KERG    .9    308.        90.8          .         5.00        2.56    
KIRU   6.0    10.0       -1.19        53.4        6.00        2.19    
KIT3   3.7    148.       -.356        64.2        4.57        2.66    
KOKB*  6.7    41.7       -.595        85.4        6.32        1.77    
KOSG*  7.0    4.34       -28.5        46.4        5.03        2.69    
KWJ1   2.0    308.       -.808        68.0        6.50        1.62    
LHAS   5.7    179.       -.486        62.3        5.00        2.22    
LPGS    .8    150.       -.761        56.0        5.00        3.11    
MAC1   4.7    91.4       -.502        32.6        4.00        2.41    
MAD2   2.0    .267        3.83        102.        6.51        2.12    
MADR*  2.6    .965       -1.08          .         6.00        2.12    
MALI   7.0    42.4       -2.72          .         6.73        2.34    
MAS1   7.0    94.9        .443        47.6        4.46        2.33    
MCM4   7.0    96.5       -.539        37.6        4.31        1.51    
MDVO   1.0    .223        646.        74.0        6.00        2.15    
MKEA   5.0    .129       -.570        52.3        5.00        2.55    
NOTO   3.0    .173        1.45        39.8        6.15        2.81    
PERT   7.0    2.65       -11.3        55.9        5.50        2.75    
POL2    .8    89.1       -.572        72.0        4.00        2.35    
RCM6   6.0    115.       -.594        64.0        6.90        2.24    
REYK   4.2    181.       -.490        57.4        6.40        1.74    
SANT*  5.5    .150e+04   -1.58        45.6        5.16        1.33    
SELE   2.0    106.       -.801        35.0        4.00        3.05    
SHAO   1.9    101.       -.386        58.4        6.03        2.49    
STJO   7.0    2.87        .141e-01    40.7        5.23        2.68    
TAHI    .7    .181e+05    .456        84.0        5.00        2.01    
TID2*  7.0    23.8       -.500        40.9        5.31        2.54    
TSKB   1.0    2.29       -.401        47.0        5.00        2.79    
USUD   6.0    1.29       -.284        41.2        5.35        2.72    
WTZR*  4.4    6.44       -2.77        63.1        5.00        2.70    
WUHN   4.9    .517e+06   -.434e+04    47.6        5.42        2.93    
YELL*  7.0    .434       -1.42        45.1        4.92        1.92    
PRN01  6.7    83.5        27.0        53.8        5.15        2.48    
PRN02  7.0    81.7       -399.        55.5        5.00        2.67    
PRN03  6.9    81.4        48.4        57.6        5.00        2.25    
PRN04  7.0    81.0        44.5        56.8        5.87        2.40    
PRN05  7.0    83.3        111.        52.8        5.00        2.47    
PRN06  6.8    80.8       -.880        53.8        5.16        2.23    
PRN07  7.0    81.9        753.        53.2        5.30        2.41    
PRN09  7.0    79.8       -10.6        56.0        5.00        2.23    
PRN10  7.0    80.5        11.8        57.2        5.44        2.19    
PRN14  7.0    82.9        21.3        51.7        6.37        2.37    
PRN15  7.0    2.97        463.        55.8        5.59        2.13    
PRN16  7.0    83.2        25.8        54.1        5.59        2.49    
PRN17  7.0    82.1       -159.        57.9        5.15        2.39    
PRN18  6.8    80.9        3.54        51.9        5.30        2.40    
PRN19  7.0    79.3        201.        53.2        5.15        2.64    
PRN21  7.0    81.1        77.6        53.9        5.16        2.54    
PRN22  7.0    80.4        15.1        51.9        5.16        2.36    
PRN23  7.0    81.3        2.86        57.2        5.31        2.42    
PRN24  7.0    79.9        739.        56.1        5.31        2.46    
PRN25  7.0    83.4       -6.43        51.1        5.60        2.37    
PRN26  6.6    80.8       -12.5        53.2        5.16        2.21    
PRN27  7.0    84.3        40.8        54.4        5.00        2.56    
PRN29  6.8    81.1        285.        50.8        5.74        2.60    
PRN30  7.0    82.8       -79.3        53.6        5.00        2.54    
PRN31  7.0    80.0       -.996        54.3        5.16        2.41    
_______________________
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  8 31   97  9  1   97  9  2   97  9  3   97  9  4   97  9  5   97  9  6
prn   3d rss (cm)
  1     434        336        385        335        437        392        527   
  2     421        366        229        275        380        246        227   
  3     258        254        244        252        292        264        377   
  4     242        282        340        200        281        255        244   
  5     242        333        529        251        251        307        400   
  6     902        877        954       1151        810        741        904   
  7     551        449        419        891        225        358        420   
  9     241        206        207        280        134        227        164   
 10     326        416        483        398        348        574        774   
 13     298        348        754        554        328        311        515   
 14    1694        803        696        548        193       1242        965   
 15     311        262        239        144        139        281        285   
 16     599        415        820        452        407        444        426   
 17     137        251        244        136        231        187        491   
 18     502        458        763        630        502        448        381   
 19     528        370        512        415        324        268        188   
 21     292        177        493        328        461        200        214   
 22     339        392        350        382        616        383        284   
 23     783        476        444        295        496        597        740   
 24     343        377        498        778        411        367        534   
 25     310        324        461        328        215        186        285   
 26     437        577        280        271        312        285        222   
 27     238        313        342        335        388        419        627   
 29     219        421        339        262        688        559        340   
 30     223        274        306        319        200        186        302   
 31     660        534        424        379        242        311        194   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

global:   algo ankr areq asc1 bahr braz brmu brus cas1 casa chat cro1 dgar fair flin fort gode gol2 guam hark hbrk hklo iisc irkt kely kerg kiru kit3 kokb kosg kwj1 lhas lpgs mac1 mad2 madr mali mas1 mcm4 mdvo mkea noto pert pol2 rcm6 reyk sant sele shao stjo tahi tid2 tskb usud wtzr wuhn yell

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