Subject: [IGSREPORT-4722] Wk 0948 JPL Analysis Report
From: D C Jefferson
Date: Fri, 20 Mar 1998 14:14:39 PST

******************************************************************************
IGS Electronic Report    Fri Mar 20 14:14:39 PST 1998      Message Number 4722
******************************************************************************

Author: D C Jefferson
Subject: Wk 0948 JPL Analysis Report

******************************************************************************
JPL ANALYSIS REPORT   GPS-WEEK 0948 (DAYS 67-73, DATES 1998 Mar 08 - Mar 14)
******************************************************************************

Submitted by the JPL IGS/FLINN Analysis Team:

D C Jefferson, Y E Bar-Sever, M B Heflin, M M Watkins, F H Webb, J F Zumberge

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 (137.78.60.30),
directory pub/jpligsac/0948.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09487.sum         This text file.
jpl09487.erp         Earth rotation parameters for GPS week 948.
jpl09487.snx         Ground station coordinates for GPS week 948, SINEX format.
jpl0948[0-6].sp3     GPS ephemerides for GPS week 948, sp3 format.
jpl0948[0-6].tro     Ground station troposphere estimates for GPS week 948.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 10.0 cm

We continue to exclude all data from PRN13 and deweight all data from PRN08
this week.  Also, data from PRN02 and PRN03 were mismodeled on days 070 and
071 respectively.  Data from PRN02 have been deweighted on day 070, and
those from PRN03 have been excluded on day 071.

According to the file nanu1998.mes obtained from the IGS CBIS, PRN31 was
unusable on day 066.  Data from this satellite did not meet our initial
convergence criteria on the following day (067) and have been excluded from
the analysis of day 067 accordingly.

Also as recorded in the same NANU file, PRN26 was unusable on day 069-075.
Large clock discontinuities in bias and drift were detected for PRN26 at
approximately 15:55 on day 069.  The magnitudes of these resets were about
90 microseconds and 2.6 microseconds/second respectively.  Data from this
satellite were mismodeled on day 070 and excluded this day.  Additionally, we
have elected to deweight data from this satellite on the following day (071).

Beginning this week we add a new candidate station.  As with other sites,
this stations is 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)
NSSP (Yerevan, Armenia)             3478646.9048   3418805.8402   4097987.2315

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: TID2 (not NRC1) used as reference clock day 067.
WARNING: USNO (not NRC1) used as reference clock days 069-071.
WARNING: Data from PRN08 deweighted the entire GPS week 948.
WARNING: Data from PRN13 excluded the entire GPS week 948.
WARNING: Data from PRN31 excluded day 067.
WARNING: Data from PRN02 deweighted day 070.
WARNING: Data from PRN26 excluded day 070, deweighted day 071.
WARNING: Data from PRN03 excluded day 071.
WARNING: Data from MATE, NANO excluded day 067.
WARNING: Data from KELY, SPK1 excluded day 069.
WARNING: Data from KELY excluded day 070.
WARNING: Data from NOTO excluded day 072.

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 948 (1998 Mar 08 - Mar 14)
     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
50880.50  -7070  20737    80029  2093    2    3    10     10 37 24 25 -209  180 
50881.50  -7222  20959    77951  2064    2    3     9      9 37 22 26 -196  191 
50882.50  -7394  21161    75858  2122    3    3    10     10 37 25 26 -208  179 
50883.50  -7533  21363    73710  2173    3    3    10     10 37 24 25 -192  138 
50884.50  -7656  21557    71536  2176    3    3    10     10 37 24 25 -153  146 
50885.50  -7756  21773    69369  2157    3    3    10     10 37 24 26 -136  203 
50886.50  -7888  22002    67202  2177    3    3    10     10 37 23 26 -168  179 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 948:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 948 (1998 Mar 08 - Mar 14)
      98  3  8   98  3  9   98  3 10   98  3 11   98  3 12   98  3 13   98  3 14
prn   3d rss (cm)
  1       8          9          6         11         11          7          9   
  2       8         10         32         25          9         11         11   
  3      13          6         15         18                    11         11   
  4       8          5         10         11          8         11          8   
  5       9          8          7         10          9          6          8   
  6       8          7          9          7         13          8         10   
  7       7          6          9         10         17         10         12   
  8      64         55         63         60         46         55         57   
  9       8         10          8         14          7          6         13   
 10      12          9         16         11          5         15         14   
 14      11         10         10          9         13          7         11   
 15      16         16         19         18         22          9          7   
 16       9          8          8          6          6          9         12   
 17       8          6          8          9         14          7          7   
 18       9          8          8          7          4         12         16   
 19      14         17         15         13         10         18         24   
 21       9          8          9         10         11         11         14   
 22      11          6         11          6         11         13          9   
 23      10         11         12         13         20         13         12   
 24      28          8         14         12         11         21         31   
 25       8          7          5          6          8          8          9   
 26      10          7         13                    51         17         18   
 27      15         10         18         18         18         11         16   
 29       8          9          5          6          9          6          6   
 30       7          8          6         16         11          7          6   
 31                 11         14          9          5         12          8   
_______________________
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 948 (1998 Mar 08 - Mar 14)
 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*  7.0    27.1        .523        54.7        4.35        2.84    
ASC1   5.7    .103e+04   -.298e-01    66.9        4.75        1.57    
AUCK   6.0    95.8       -.967e-01    41.7        5.43        2.80    
BAHR   7.0    2.63        233.        46.0        4.87        2.93    
BOGT   4.3    217.       -.128        73.6        5.43        1.60    
BRUS   5.0    .142        2.04        62.4        4.00        2.77    
CAGL   1.0    43.2       -.238        42.0        4.00        3.10    
CAS1   6.5    .668e+07   -.134e+05    39.2        6.16        1.12    
COCO   2.9    100.       -.128e+05    51.4        5.00        2.99    
CRO1   2.0    157.        .185e-01    54.0        5.52        1.86    
DAV1*  5.5    225.       -.946e-01      .         4.67        .931    
DGAR   5.0    405.       -.694e-01    66.4        5.54        1.60    
EISL   7.0    166.       -.823e-01    54.5        5.00        2.71    
FAIR*  7.0    .107       -.874e-01    35.9        4.58        1.98    
FLIN   1.0    98.8        .465e-01    41.0        3.00        2.29    
FORT*  7.0    .372       -.229        81.6        6.48        1.65    
GOL2*  7.0    .587e-01   -.528        47.5        4.00        2.22    
GUAM*  7.0    122.       -.793e-01    60.1        6.15        2.01    
HARK*  6.9    8.21       -.168        56.6        5.31        2.63    
IRKT*  5.9    .231        .348        54.4        4.35        2.58    
KELY    .7    .382e+04   -1.11          .         5.00        1.32    
KERG*  5.7    741.        .207e+04      .         5.84        2.04    
KIT3*  2.7    123.       -.484e-01    69.4        4.00        2.70    
KOKB*  7.0    .779e-01   -17.5        73.7        4.87        2.52    
KWJ1*  7.0    116.       -.811e-01    70.3        5.46        1.92    
LHAS*  6.9    100.       -.788e-01    56.0        4.31        2.60    
MAC1*  6.5    88.9       -.760e-01    45.5        4.75        1.95    
MAD2*  5.1    .140e+04    .863        54.1        5.36        1.83    
MALI*  4.8    .829e+04   -27.8        90.2        7.00        1.67    
MAS1*  1.0    2.89        .460e-01    47.0        4.00        2.26    
MCM4   3.5    91.9       -.260e-01    43.4        5.00        1.22    
MDVO   1.0    .105e+05    855.        69.0        6.00        1.85    
MKEA   4.0    159.        .498        68.6        4.28        2.58    
NICO    .9    72.0        .346e-01    44.0        4.00        2.33    
NOTO   1.0    .392       -.346        32.0        5.00        2.67    
NRC1   3.1    .           .           68.5        3.37        2.93    
OHIG*  3.6    .275e+04    .312e-02    57.8        4.77        1.58    
ONSA*  6.9    .964e-01    .545        38.3        3.62        2.31    
PERT*  4.0    1.89       -4.14        55.1        4.94        2.80    
POL2   2.0    82.5        .527e-01    59.6        3.00        2.48    
RCM6   1.0    97.0        .307e-02    77.0        6.00        2.51    
REYK   1.0    82.6        .242e-01    52.0        6.00        1.76    
SANT*  6.2    .282e+04   -1.89        47.3        4.49        1.42    
TAHI   3.4    .133e+04    .642e-01    75.6        6.08        2.08    
THU1*  4.9    76.4       -.111        46.4        5.60        1.95    
TID2*  6.9    46.8       -.201        35.8        5.32        2.39    
TSKB*  7.0    1.34       -1.73        47.4        4.00        3.02    
USNO   3.0    .           .           58.1        5.00        2.75    
USUD   7.0    .647       -.589        46.9        4.15        2.72    
WES2   1.0    .137        .678        59.0        4.00        2.76    
WTZR*  5.4    .560e-01    1.10        65.1        4.00        2.61    
WUHN   2.9    5.88       -736.        48.7        4.68        2.26    
YAR1*  7.0    91.4       -.757e-01    37.9        4.50        2.26    
YELL*  7.0    393.        2.00        47.0        4.71        1.21    
PRN01  7.0    80.6        41.6        51.9        5.00        2.20    
PRN02  6.0    81.7       -464.        60.0        5.00        2.15    
PRN03  6.0    83.9        107.        54.1        5.00        2.10    
PRN04  7.0    80.8        16.0        57.8        5.00        2.06    
PRN05  7.0    80.5        140.        57.4        4.45        2.53    
PRN06  7.0    81.3       -.386        55.6        5.15        2.10    
PRN07  7.0    82.6        771.        57.1        5.00        2.13    
PRN09  7.0    78.3       -33.1        57.2        4.87        2.16    
PRN10  7.0    82.3        19.4        57.1        4.87        2.06    
PRN14  7.0    78.9        27.5        50.0        4.87        2.31    
PRN15  7.0    4.10        533.        57.6        5.29        2.06    
PRN16  7.0    81.3        52.6        54.0        4.87        2.38    
PRN17  7.0    81.5       -175.        59.1        4.87        1.98    
PRN18  7.0    78.9        11.7        54.3        5.00        2.22    
PRN19  7.0    83.7        384.        57.7        5.00        2.00    
PRN21  7.0    83.3        27.7        52.5        4.87        2.12    
PRN22  7.0    80.0        51.0        53.2        5.00        2.18    
PRN23  7.0    80.0        10.8        53.5        5.00        2.28    
PRN24  7.0    81.7        809.        60.9        5.00        2.18    
PRN25  7.0    83.7       -6.94        53.6        5.00        2.13    
PRN26  4.9    .781e+04   -143.        56.0        5.00        2.04    
PRN27  7.0    80.7        20.7        61.4        5.00        2.08    
PRN29  7.0    82.0        289.        52.3        5.00        2.30    
PRN30  7.0    81.8       -29.1        54.7        4.87        2.39    
PRN31  6.0    80.8        1.89        57.2        5.00        2.16    
_______________________
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
      98  3  8   98  3  9   98  3 10   98  3 11   98  3 12   98  3 13   98  3 14
prn   3d rss (cm)
  1     490        450        584        423        284        255        298   
  2     301        169        374        348        142        161        668   
  3     272        363        317        315                   563        230   
  4     283        507        497        513        604        474        444   
  5     400        345        396        233        185        190        331   
  6     744        807        814        764        785        689        647   
  7     381        251        293        303        289        445        339   
  8     392        487        670        329        375        329        693   
  9     223        187        263        426        228        470        302   
 10     288       1048        771        441        602        557        594   
 14     576        749        650        968        777        550        472   
 15     282        299        259        207        249        401        279   
 16     618       1024        483        400        846        550        589   
 17     539        425        523        527        418        348        272   
 18     347        373        385        328        372        699        411   
 19     227        204        306        436        436        294        139   
 21     740        411        520        466        521        312        379   
 22     355        477        592        936        412        447        611   
 23     453        464        259        384        292        306        270   
 24     736        481        273        270        249        337        394   
 25     432        328        442        803        274        320        432   
 26     886        125        212                   138        168        716   
 27     561        379        299        165        277        282        344   
 29     371        224        198        220        277        309        195   
 30     246        257        307        312        232        265        374   
 31                533        502        466        348        235        256   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

global:   algo asc1 auck bahr bogt brus cagl cas1 coco cro1 dav1 dgar eisl fair flin fort gol2 guam hark irkt kely kerg kit3 kokb kwj1 lhas mac1 mad2 mali mas1 mcm4 mdvo mkea nico noto nrc1 ohig onsa pert pol2 rcm6 reyk sant tahi thu1 tid2 tskb usno usud wes2 wtzr wuhn yar1 yell

[Mailed From: [email-masked]]