Subject: [IGSREPORT-0848] JPL Analysis Report (week 738)
From: David C. Jefferson
Date: Wed, 16 Mar 1994 16:48:03 PST

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IGS Electronic Report    Wed Mar 16 16:48:03 PST 1994      Message Number 0848
******************************************************************************

Author: David C. Jefferson
Subject: JPL Analysis Report (week 738)

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JPL ANALYSIS REPORT   GPS-WEEK 0738 (DAYS 58-64, DATES 1994 Feb 27 - Mar 05)
******************************************************************************

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/0738.  These files have also been sent to the CDDIS.

______________________________________________________________________________
filename               contents
______________________________________________________________________________
jpl07387.sum           This text file.
jpl07387.erp           Earth rotation parameters for GPS week 738.
jpl0738[0-6].sp3       GPS ephemerides for GPS week 738, sp3 format.
______________________________________________________________________________

Beginning this week, we have tightened our criterion for a satellite's
inclusion in the sp3 products.  We now include only those satellites whose
maximum 3drss formal error over the day is not more than 50 cm.  (The previous
value was 100 cm; see jpl07217.sum.)  

Although included in our analyses for the entire week, data from PRN03
appeared to be sparse for day 061 (Mar 2).  Formal errors for this satellite
were large enough to warrant exclusion from the jpl07383.sp3 orbit file.  We
also experienced a lack of data from PRN28 for days 058-062 (Feb 27 - Mar 3).
During this period, this satellite was included only on day 062.  However,
formal errors were large enough that it was excluded from this day's sp3
file.  PRN28 is of course absent from the respective sp3 files for the other
days of this time span, and the corresponding columns in our orbit tables as
well.

According to the file gpsn1.txt obtained from tycho.usno.navy.mil, PRN27 was
scheduled unusable for up to 12 hours beginning at 19:15 UT on day 062 for
repositioning.  We have excluded this satellite from this day's analysis only.

In order to reduce the cpu time required for processing, we have used a
smaller, well-distributed subset of no more than 35 stations for days 062-064
(Mar 3-5); sites not used on these days do not necessarily reflect a problem
at those locations.  However, we did find that the inclusion of GODE caused an
excessive number of outliers in the analysis of day 059 (Feb 28). Consequently,
we have deliberately deleted this site from our processing on this day.

WARNING: No orbit solutions for PRN03 on day 062 due to lack of data.
WARNING: No orbit solutions for PRN28 on days 058-062 due to lack of data.
WARNING: Data from PRN27 excluded on day 062 due to a maneuver.
WARNING: Data from GODE excluded on day 059.

JPL LODR TABLE                               GPS week 738 (1994 Feb 27 - Mar 05)
  MJD       LODR     +/-
          (ms/day)
 49410.5    2.72     0.01
 49411.5    2.77     0.01
 49412.5    2.74     0.01
 49413.5    2.76     0.01
 49414.5    2.71     0.02
 49415.5    2.73     0.02
 49416.5    2.70     0.01
END LODR TABLE

NOTE: In the following table, UT1R-UTC are the assumed nominal values from
IERS Bulletin-B predicts; estimated LODR values are given in the previous
table. See IGS Mail Message 97 for details.

JPL UTPM TABLE                               GPS week 738 (1994 Feb 27 - Mar 05)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49410.5   .14152   .44735   .05072  .00010  .00011  .00000  .0  .11  .00  .00  36 25  0
 49411.5   .14319   .44656   .06430  .00009  .00009  .00000  .0  .03  .00  .00  41 25  0
 49412.5   .14421   .44487   .06173  .00008  .00008  .00000  .0  .05  .00  .00  45 25  0
 49413.5   .14504   .44302   .05915  .00008  .00009  .00000  .0  .05  .00  .00  44 25  0
 49414.5   .14631   .44074   .05655  .00011  .00011  .00000  .0  .03  .00  .00  25 25  0
 49415.5   .14732   .43894   .05394  .00010  .00010  .00000  .0 -.02  .00  .00  25 25  0
 49416.5   .14786   .43713   .05131  .00008  .00009  .00000  .0 -.03  .00  .00  34 26  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 738:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 738 (1994 Feb 27 - Mar 05)
      94  2 27   94  2 28   94  3  1   94  3  2   94  3  3   94  3  4   94  3  5
prn   3d rss (m)
  1       0.47       0.50       0.46       0.55       0.72       0.64       1.03
  2       0.47       0.66       0.76       0.98       0.97       0.74       0.61
  3       0.69       0.84       0.3                   0.8        0.71       0.54
  4       0.53       0.43       0.52       0.62       0.40       0.43       0.53
  5       1.07       0.99       0.67       0.95       0.87       0.73       0.90
  7       0.45       0.49       0.55       0.82       0.46       0.61       0.41
  9       0.47       0.29       0.22       0.33       0.44       0.45       0.39
 12       0.39       0.19       0.15       0.24       0.39       0.40       0.34
 13       0.42       0.43       0.49       0.59       0.60       0.60       0.53
 14       1.15       0.66       0.66       0.57       0.55       0.56       0.59
 15       0.37       0.34       0.27       0.36       0.40       0.69       0.45
 16       1.25       0.77       0.60       0.81       0.70       0.47       0.80
 17       0.85       0.70       0.76       0.80       0.55       0.68       0.71
 18       0.57       0.47       0.62       0.50       0.60       0.58       0.42
 19       0.35       0.31       0.31       0.52       0.43       0.33       0.26
 20       1.01       0.97       0.55       0.86       0.79       0.42       0.80
 21       0.53       0.55       0.41       0.77       0.43       0.69       0.82
 22       0.62       1.07       0.35       0.59       0.53       0.72       0.94
 23       0.57       0.31       0.45       0.32       1.09       0.38       0.56
 24       0.63       0.63       0.56       0.37       0.24       0.36       0.65
 25       0.80       0.30       0.25       0.60       0.41       0.96       0.74
 26       0.62       0.43       0.65       0.61       0.71       0.48       0.86
 27       0.22       0.38       0.49       0.4                              0.4 
 28                                                              0.6        0.74
 29       0.52       0.57       0.41       0.43       0.52       0.40       0.49
 31       0.93       0.82       0.74       0.34       0.76       0.57       0.63
_______________________
END ORBIT REPEATABILITY 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
      94  2 27   94  2 28   94  3  1   94  3  2   94  3  3   94  3  4   94  3  5
prn   3d rss (m)
  1       7.4        7.3        8.0        8.1        7.2        7.1        7.2 
  2       7.0        8.6        8.5       10.0        8.3       12.6       10.3 
  3      12.2       12.6       13.7                  11.0       11.7       12.0 
  4      11.0       13.6       11.5        7.9       10.6       13.2       13.6 
  5      11.6       10.9        6.4        6.2        9.2        9.7        8.2 
  7       4.1        3.8        3.6        3.8        4.7        5.3        5.8 
  9       5.4        6.7        5.1        3.8        5.9        5.3        4.7 
 12       4.5        4.6        6.6        5.4        3.4        5.7        7.8 
 13       2.4        2.1        4.5        8.1       55.0        5.5       17.9 
 14       7.2        8.2        9.2        8.9        7.2        4.9        7.2 
 15       3.5        3.2        2.9        3.0        3.5        2.5        3.1 
 16       3.6        6.9        7.9        7.0        6.7        9.4       12.6 
 17       4.9        5.0        2.9        2.9        4.3        4.6        4.3 
 18       6.4       10.9       12.2       19.6        8.4        5.7        5.6 
 19       3.8        6.0        7.7        6.5        5.2        5.4        6.3 
 20       6.3        5.4        5.4        4.5        5.5        4.3        3.8 
 21       4.2        5.5        3.7        6.2        6.3        4.3        4.7 
 22       4.7       10.0        9.4       11.7        4.1        5.1        5.3 
 23      17.6       16.9       14.5        9.0        5.9        4.1        3.4 
 24       6.2        7.4       10.4        9.4        5.1        6.3        7.7 
 25       5.0        4.2        5.3        5.7        5.0        5.3        6.0 
 26       2.2        2.7        3.5        2.6        2.0        2.0        2.6 
 27       5.6        5.6        5.0        4.4                              5.0 
 28                                                              3.9        3.2 
 29       2.0        2.7        2.8        3.7        2.4        2.2        2.2 
 31       3.8        4.3        4.2        3.7        4.5        5.0        5.1 
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

The following tables, as explained in IGS Report Nos. 99 and 295, indicate the
amount of global network tracking data used in this week's analysis:

JPL SITE SUMMARY TABLE (no. stations)        GPS week 738 (1994 Feb 27 - Mar 05)
      94  2 27   94  2 28   94  3  1   94  3  2   94  3  3   94  3  4   94  3  5
Fiducial 12.0       12.7       12.8       12.5       12.8       12.5       12.2
Total    32.0       36.5       41.2       40.3       22.6       22.4       31.1
END SITE SUMMARY TABLE

JPL GROUND STATION INCLUSION TABLE           GPS week 738 (1994 Feb 27 - Mar 05)
      94  2 27   94  2 28   94  3  1   94  3  2   94  3  3   94  3  4   94  3  5
site    % data
ALBH      105        105        103        104          0          0        104
ALGO*     100        104        105        102         98        103        103
AREQ        0        109        107        106        102        106        104
BRMU       92         87         87         92          0          0         99
DRAO       25         74         94         96          0          0          0
FAIR*      99        101         85         88        105        110        105
FORT       84        101         98         86          0         84         94
GODE       99          0        102        102          0          0         99
GOLD*      94        100         99        101         96         97         97
GRAZ        0          0         49         96          0          0          0
HART*      97         97         99         57         90        104        104
HERS       84          0         91         95          0          0          0
HOBA       99         95        102         99         94         96        102
JPLM       81         85         89         94        100        104        103
KIRU        0         94        104        100          0          0          0
KOKB*      81         81         88        104        101        105        105
KOSG*      76         85         98         95         92         99         98
KOUR        0         86        100         95         94         89         52
MADR*      79         80         82         93         93         99         98
MASP        0         89         99         96          0          0        101
MATE        0         96        102         94          0          0         99
MCMU        0         28        105        107        106        114        111
MDO1       96         89         86         89          0          0         85
METS       93         96         91          0          0          0         99
NLIB       85         84         78         75          0          0         74
NYAL      109        105        110        110         97          0          0
ONSA        0         81         98         96          0          0          0
PAMA       96         95         95         96         96         88         88
PIE1       97         99        100        100          0          0        100
QUIN       80         72         69         63         94        102         99
RCM5      101        104        106        106         96         98        100
SANT*      70        103        109        106        103        106        105
STJO       88         93         92         89          0          0          0
TAIW       88        102        105        101          0          0          0
TIDB*     103        101        103        102        102        106        100
TROM*     104        105        105        105         99         15          0
TSKB      108        109        108        105          0          0          0
USUD       95         99        108        105        102        108        105
VNDP       95          0         69         77          0          0          0
WEST      100        103        101        100          0          0         75
WETT*      94        100         96         97         97        101        102
YAR1*     104        106        106        104        100        105        101
YELL*     100        102        102        100        101        104        102
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE

As described in IGS Report No. 634, the table below indicates the repeatability
of clock solutions for all satellites and stations used in this week's analysis:

JPL CLOCK REPEATABILITY TABLE                GPS week 738 (1994 Feb 27 - Mar 05)
      94  2 27   94  2 28   94  3  1   94  3  2   94  3  3   94  3  4   94  3  5
comp log10(rms/ps)
PRN01     4.0        6.0        3.8        4          3.7        4.3        3.7
PRN02     5.5        6.5        3.7        3.8        2.9        4.2        3.9
PRN03     6.0        6.6        4          4          4.0        4.4        3.8
PRN04     4.3        5.6        4.2        4.1        3.6        4.2        4.4
PRN05     4.7        5.7        3.8        4.1        3.4        4.3        4.1
PRN07     5.4        6.1        3.9        3.3        3.9        4.1        3.8
PRN09     5.4        6.2        3.8        3.6        3.7        3.9        3.9
PRN12     5.4        6.2        4.3        4.2        4.2        4.3        4.4
PRN13     4.3        6.1        4.4        4.3        3.8        4.1        3.9
PRN14     5.3        6.0        3.9        4.0        3.7        4.3        4.0
PRN15     4.9        5.6        3.3        4.0        4.2        4.2        3.9
PRN16     5.4        6.3        3.8        3.9        3.8        4.2        3.9
PRN17     5.2        6.1        4.3        4.4        4.3        4.5        4.2
PRN18     5.3        6.4        3.9        4.2        4.1        4.1        3.8
PRN19     4.2        5.8        3.5        3.8        3.4        4.2        3.9
PRN20     5.8        6.4        3.9        4.1        3.4        4.1        4.1
PRN21     5.3        6.0        4.0        3.8        4.0        4.1        4.0
PRN22     5.6        6.3        4.0        4.3        3.9        4.4        4.0
PRN23     4.7        5.9        3.8        3.9        3.2        4.3        3.9
PRN24     5.0        6.1        4.3        4.3        3.8        4.3        4.2
PRN25     4.6        5.7        3.9        3.9        3.5        4.1        3.9
PRN26     4.8        5.9        4.1        4.0        3.5        4.3        4.0
PRN27     5.9        6.4        3.5        2                                4  
PRN28                                                 4          4.1        3.8
PRN29     5.3        6.5        3.8        4.0        3.8        4.2        3.8
PRN31     6.9        7.6        3.7        3.6        4.0        4.2        3.9
ALBH      4.7        5.5        3.7        3                                4  
AREQ                 6          4.2        4.3        4.1        4.3        4.1
BRMU      5.4        6.2        3.6        4                                4  
CANB      5.3        6.2        3.8        4.0        3.1        4.2        4.2
FAIR      4.6        5.4        3.7        3.8        3.3        4.2        3.9
FORT      4.3        7          4.2        4                     5          4.2
GODE      2                     4          4                                4  
GOLD      4.0        5.7        3.9        4.1        3.4        4.3        3.9
GRAZ                            3          3                                   
HART      5.4        6.3        3.9        4          3.5        4.2        3.7
HARV      4.3        5.1        3.7        3.7        3.8        4.3        4.0
HERS      3                     3          3                                   
HOBA      5.4        6.2        4.0        4.1        3.6        3.8        4.0
JPLM      4.4        5.2        3.8        3.9        3.4        4.3        4.0
KIRU                 6          3.8        4                                   
KOKB      5.8        6.5        4.1        3.9        3.9        4.3        3.9
KOSG      5.4        6.2        3.7        3.9        3.4        4.3        3.8
KOUR                 6          3.9        4.2        4.0        4.3        4  
MADR      5.6        6.4        3.9        3.9        3.7        4.3        3.8
MASP                 6          4.3        4                                4  
MATE                 6          3.2        3                                4  
MCMU                 6          3.9        3.9        3.6        4.2        4.0
MDO1      4.6        5.4        3.3        1                                4  
METS      5.6        6.4        4                                           4  
NALL      4.7        5.6        4.2        4.2        4                        
NLIB      5.4        6.2        3.6        4                                4  
ONSA                 6          4.0        4                                   
PAMA      3.8        6.1        4.3        4.2        4.0        4.1        4  
PENT      5          5          3.5        3                                   
PIE1      3.7        4.3        3.6        4                                4  
QUIN      7.3        8.2        3.6        3.8        3.8        4.3        4.0
RCM5      5.2        6.1        3.8        3.8        3.8        4.2        3.9
SANT      4.3        5.8        3.7        3.8        3.1        4.3        4.3
STJO      5.7        6.4        3.8        4                                   
TAIS      4.8        5.6        3.9        4                                   
TROM      5.3        6.2        3.7        3.8        3.8        3             
TSKB      4.6        5.4        3.8        4                                   
USUD      4.8        5.6        3.9        4.0        3.5        4.1        3.9
VNDP      4                     2          4                                   
WEST      3.9        4.6        3.6        4                                4  
WETB      5.0        5.9        3.8        3.9        3.4        4.2        3.6
YAR1      5.3        6.1        4.0        3.7        3.6        4.3        4.1
YELL      5.4        6.3        3.9        4.1        3.6        4.3        4.2
_______________________
END CLOCK REPEATABILITY TABLE