Subject: [IGSREPORT-4746] Wk 0949 JPL Analysis Report
From: D C Jefferson
Date: Mon, 30 Mar 1998 14:27:55 PST

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IGS Electronic Report    Mon Mar 30 14:27:55 PST 1998      Message Number 4746
******************************************************************************

Author: D C Jefferson
Subject: Wk 0949 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0949 (DAYS 74-80, DATES 1998 Mar 15 - Mar 21)
******************************************************************************

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/0949.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl09497.sum         This text file.
jpl09497.erp         Earth rotation parameters for GPS week 949.
jpl09497.snx         Ground station coordinates for GPS week 949, SINEX format.
jpl0949[0-6].sp3     GPS ephemerides for GPS week 949, sp3 format.
jpl0949[0-6].tro     Ground station troposphere estimates for GPS week 949.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 10.0 cm

ERRATA
------
In our AC report for GPS week 920 (jpl09207.sum), the following was stated
in our introduction of our strategy to estimate tropospheric gradients in
our processing:

 "2. We are now estimating troposphere horizontal delay gradients at all the
     sites.  The two gradient parameters are modeled as random walk with sigma
     of 0.3 cm/sqrt(hour) and are estimated every five minutes.
  3. We have reduced the random walk sigma on the estimated zenith wet delay
     from 10.2 cm/sqrt(hour) to 3 cm/sqrt(hour)."

The units on all of the random walk sigma parameters mentioned above should
read "mm/sqrt(hour)".  We regret any inconvenience caused by the misprint.

GENERAL
-------
This week we begin to include data from PRN13 (Block II-R); however, all
data from this satellite have been deweighted.  We also continue to deweight
all data from PRN08.

Data from PRN03 did not meet our initial orbit convergence criteria on day
079, and have been excluded accordingly.  Note that data from PRN06 were
deweighted on day 0 of the following week (950), hence the large overlap
value in our orbit repeatability table for this satellite on day 080.

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 days 075 and 079.
WARNING: USNO (not NRC1) used as reference clock day 076.
WARNING: MKEA (not NRC1) used as reference clock days 077, 078, and 080.
WARNING: Data from PRN08 and PRN13 deweighted the entire GPS week 949.
WARNING: Data from PRN03 excluded day 079.
WARNING: Data from LPGS, MALI excluded day 074.
WARNING: Data from LPGS, MALI, SELE excluded day 075.
WARNING: Data from KELY, MALI, ROCH, WSRT excluded day 076.
WARNING: Data from KERG, ONSA, ROCH, SHAO excluded day 077.
WARNING: Data from HARK, HRAO, IISC, KERG, MADR, ROCH excluded day 079.
WARNING: Data from HARK, HRAO, KERG excluded day 080.

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 949 (1998 Mar 15 - Mar 21)
     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
50887.50  -8098  22200    65045  2138    3    3    10     10 37 23 27 -212  144 
50888.50  -8346  22353    62893  2165    2    3    10     10 37 24 27 -201  146 
50889.50  -8556  22513    60741  2140    3    3    10     10 37 23 27 -226  151 
50890.50  -8784  22666    58607  2127    3    3    10     10 37 24 27 -209  160 
50891.50  -8957  22834    56505  2077    2    3    10     10 37 26 27 -201  157 
50892.50  -9138  23023    54441  2051    3    3    11     11 37 24 26 -210  183 
50893.50  -9368  23215    52375  2081    3    3    10     10 37 23 27 -242  136 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 949:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 949 (1998 Mar 15 - Mar 21)
      98  3 15   98  3 16   98  3 17   98  3 18   98  3 19   98  3 20   98  3 21
prn   3d rss (cm)
  1      10          4          8         10          5         11          8   
  2       9          7         13         16         10         14         22   
  3       8          7          9          9          8                     6   
  4       8          6         12         10          5         11         15   
  5      10          4          7          9          8          9          7   
  6       9          7         18         14         11          8        423   
  7       7          7         12         16          6         13         13   
  8      63         33         48         52         68         55         51   
  9      14         16          6          7         10          9          5   
 10      12         10         16          7         10         10         10   
 13      76         93        113         45         92         86         77   
 14      12          8          6          7          8          6         12   
 15      21         16          7          6          6         11          7   
 16      14         11          9          8          6          8          8   
 17       8          6          6         13          8         11         11   
 18      20         13          7          8          8         24         29   
 19      10          9         47         34          8         14         18   
 21      11         11         10         14         14         11         10   
 22      14          5          8          9         13         18          5   
 23      16         10         10         11         14         13         11   
 24       9         10         14          9          8         39         33   
 25       7         11          6          7          4          8          6   
 26      16         22         32         13         14          7          5   
 27      18         25          8          8          7         18         23   
 29       6          5         12          6          8          9          7   
 30       8          5         10          7         10          9          6   
 31      10         13          6         25         14         23         30   
_______________________
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 949 (1998 Mar 15 - Mar 21)
 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    2.34        3.72        45.0        3.00        2.57    
ALGO*  7.0    92.2        .843        52.4        3.77        2.70    
AREQ*  1.0    122.        .210        76.0        4.00        2.09    
ASC1   5.2    .280e+04    .229        71.6        5.00        1.40    
AUCK   5.0    90.1        .283        42.8        5.04        2.43    
BAHR   4.7    .544e+04    217.        58.4        5.42        2.61    
BOGT   3.8    265.        .395        66.0        5.54        1.48    
BRMU*  1.0    99.5        .250        46.0        5.00        2.88    
BRUS   1.0    .538e-01    3.04        63.0        4.00        2.62    
CAS1   4.4    .721e+07   -.152e+05    39.1        6.00        1.18    
CASA   1.0    .913e+04    27.4        35.0        6.00        2.84    
CHAT   2.0    112.        .133        76.5        6.10        2.67    
COCO   6.9    112.       -.136e+05    55.8        5.16        2.64    
CRO1   2.9    745.        .751e-01    55.3        5.37        1.85    
DAV1*  5.7    138.        .249          .         4.85        1.49    
DGAR   5.0    583.        .222        63.7        6.07        1.53    
EISL   7.0    192.        .232        58.2        5.00        2.64    
FAIR*  7.0    .202        .163        38.6        4.59        2.09    
FLIN   1.0    84.8        .220        42.0        4.00        2.40    
FORT*  5.9    .303        .755e-01    85.5        6.69        1.57    
GALA   1.7    .157e+04   -.114        87.7        5.53        1.56    
GODE   2.0    .258        2.44        46.5        4.00        2.56    
GOL2*  7.0    134.        .783        49.8        3.88        1.97    
GUAM*  7.0    130.        .214        69.1        5.45        1.86    
HARK*  4.8    49.2        .110e-01    58.1        5.00        2.37    
IISC   1.0    .230e+04    .320        80.0        5.00        1.75    
IRKT*  5.9    .230        .669        47.7        4.36        2.51    
KELY   1.0    85.1        .210          .         5.00        1.36    
KERG*  2.8    .267e+04    .208e+04      .         6.00        2.37    
KIT3*  5.8    118.        .190        69.3        4.19        2.20    
KOKB*  7.0    .255       -17.1        82.4        4.47        2.29    
KOUR*   .9    2.97        1.48        79.0        7.00        1.52    
KWJ1*  6.9    246.        .236        78.6        5.72        1.91    
LHAS*  7.0    108.        .236        62.7        4.16        2.45    
MAC1*  4.6    85.7        .269        45.6        4.21        1.99    
MAD2*  5.9    300.        .170        55.1        5.17        1.96    
MAG0   1.0    .289e+06    483.        32.0        5.00        2.15    
MALI*  4.0    151.       -94.0        90.5        6.77        1.65    
MAS1*  1.0    81.6        1.09        60.0        4.00        2.24    
MATE*  1.0    .241        .371        50.0        4.00        2.66    
MCM4   2.9    87.6        .389        41.7        4.71        1.13    
MDVO   2.8    .395e+04    540.        70.3        6.00        1.96    
MKEA   3.9    .102       -.720        65.8        4.00        2.31    
MOIN    .9    205.        .224        77.0        5.00        2.23    
NICO   1.0    86.7        .203        47.0        5.00        2.04    
NOTO   2.0    .317        5.98        40.5        4.00        2.62    
NRC1   2.1    .112        .169        57.7        3.00        2.79    
NYAL   5.8    23.1        .233        72.0        5.36        1.46    
OHIG*  5.7    .256e+04    .373        61.8        4.70        1.63    
ONSA*  5.0    250.        .487        38.8        3.63        2.20    
PERT*  4.0    2.75       -4.52        55.7        4.80        2.50    
RCM6   1.0    102.        .289e-01      .         4.00        2.66    
REYK   2.0    85.5        .135        56.6        6.52        1.62    
SANT*  6.4    .255e+04   -2.86        44.4        4.33        1.18    
SHAO*  1.0    89.1        .238        54.0        5.00        2.34    
TAHI   1.6    .248e+05    1.39        82.5        6.00        2.06    
TID2*  6.9    .231        .335e-01    38.5        5.73        2.29    
TSKB*  7.0    1.69       -1.49        49.2        4.00        3.00    
USNO   2.0    .246        .722        55.0        5.00        2.61    
USUD   5.0    70.3       -.341e-01    46.6        4.00        2.77    
WTZR*  7.0    .179        .769        66.5        4.31        2.48    
WUHN   3.9    8.55       -831.        52.5        5.05        2.30    
YAR1*  7.0    88.0        .239        38.9        4.15        2.01    
YELL*  7.0    33.4        3.96        45.8        4.57        1.20    
PRN01  6.9    79.7        42.5        54.3        5.00        2.32    
PRN02  6.8    80.4       -466.        63.0        4.87        2.19    
PRN03  5.9    82.9        109.        58.6        5.00        2.13    
PRN04  6.9    79.2        17.5        58.0        4.88        2.11    
PRN05  6.9    81.3        141.        60.3        4.87        2.44    
PRN06  6.9    81.6       -.395e-01    58.6        5.00        2.09    
PRN07  6.9    80.8        773.        60.5        4.87        1.96    
PRN09  6.9    81.2       -33.7        60.7        5.00        2.04    
PRN10  6.9    82.0        20.0        60.0        5.00        1.98    
PRN14  6.9    82.1        28.1        50.2        4.87        2.41    
PRN15  6.8    3.72        536.        62.0        4.88        2.10    
PRN16  6.9    79.5        54.0        55.8        5.00        2.29    
PRN17  6.9    81.4       -175.        62.5        4.87        2.02    
PRN18  6.9    80.9        12.3        58.1        5.00        2.10    
PRN19  6.9    84.8        386.        60.7        5.00        2.03    
PRN21  6.9    81.5        29.3        55.3        4.87        2.32    
PRN22  6.9    82.9        52.6        57.1        5.00        2.13    
PRN23  6.9    81.8        11.3        57.1        5.00        2.31    
PRN24  6.9    79.7        815.        63.6        5.00        1.92    
PRN25  6.9    82.2       -6.61        56.5        5.00        2.06    
PRN26  6.9    80.4       -171.        57.7        5.15        2.06    
PRN27  6.9    79.9        21.8        61.6        4.87        2.07    
PRN29  6.9    81.7        316.        55.2        5.16        2.26    
PRN30  6.9    81.6       -29.8        56.3        5.00        2.34    
PRN31  6.9    81.8        2.44        60.8        5.00        2.21    
_______________________
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 15   98  3 16   98  3 17   98  3 18   98  3 19   98  3 20   98  3 21
prn   3d rss (cm)
  1     334        327        312        505        618        337        454   
  2     459        538        344        419        280        336        148   
  3     281        240        280        248        312                   949   
  4     297        238        428        646        325        530        350   
  5     189        161        241        282        298        228        318   
  6     578        670        639        664        687        709        539   
  7     505        360        429        424        327        364        467   
  8     903        169        159        170        203        361        341   
  9     276        634        214        258        329        396        231   
 10     598        413        668        576        362        655        818   
 13     254       1170        689        175        279        590        493   
 14     462        457        493        639        384        504        480   
 15     338        248        362        314        373        273        293   
 16     484        428        229        297        477        504        801   
 17     402        375        448        411        418        396        285   
 18     719        576        404        391        793        609        414   
 19     186        497        188       1088        709        182        273   
 21     408        344        417        188        316        488        512   
 22     480        632        425        829        507        436        513   
 23     305        354        305        212        364        449        411   
 24     436        405        429        337        181        242        659   
 25     492        665        363        570        725        314        411   
 26     559        538        487        258        156        731        438   
 27     365        279        320        708        517        496        465   
 29     289        235        361        153        154        203        291   
 30     241        347        275        340        210        263        337   
 31     306        393        287        310        358        451        418   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

global:   albh algo areq asc1 auck bahr bogt brmu brus cas1 casa chat coco cro1 dav1 dgar eisl fair flin fort gala gode gol2 guam hark iisc irkt kely kerg kit3 kokb kour kwj1 lhas mac1 mad2 mag0 mali mas1 mate mcm4 mdvo mkea moin nico noto nrc1 nyal ohig onsa pert rcm6 reyk sant shao tahi tid2 tskb usno usud wtzr wuhn yar1 yell

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