Subject: [IGSREPORT-0822] JPL Analysis Report (week 737)
From: David C. Jefferson
Date: Fri, 4 Mar 1994 11:55:25 PST

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IGS Electronic Report    Fri Mar  4 11:55:25 PST 1994      Message Number 0822
******************************************************************************

Author: David C. Jefferson
Subject: JPL Analysis Report (week 737)

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JPL ANALYSIS REPORT   GPS-WEEK 0737 (DAYS 51-57, DATES 1994 Feb 20 - Feb 26)
******************************************************************************

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/0737.  These files have also been sent to the CDDIS.

______________________________________________________________________________
filename               contents
______________________________________________________________________________
jpl07377.sum           This text file.
jpl07377.erp           Earth rotation parameters for GPS week 737.
jpl0737[0-6].sp3       GPS ephemerides for GPS week 737, sp3 format.
______________________________________________________________________________

Anti-spoofing has been in effect since day 031 (Jan 31).  All analyses were
done using our current A-S strategy; see jpl07347.sum for details.

According to IGS Mail Message #510, "ALGO Domes # 40104M002 was down from Feb
23 (DOY 54) 12:00 UT to  Feb 25 (DOY 56) 14:00 UT."  For these three days, FAIR
was used as the reference frequency standard instead of ALGO.  Also, ALGO was
not used as a fiducial during this period.

This week's analysis includes the processing of data from two new global
network stations: AREQ (Arequipa, Peru) and TSKB (Tsukuba, Japan).  The
following nominal coordinates were assumed, and the station locations were
estimated (unconstrained) each day:

   AREQ:  X =  1942790.4000 m,   Y = -5804032.5000 m,    Z = -1796910.7000 m
   TSKB:  X = -3957197.5268 m,   Y =  3310201.2519 m,    Z =  3737714.9041 m

Beginning this week, we have changed the method of calculating percentages
of data used in our Ground Station Inclusion Table.  Previously, these values
were calculated based on a fixed number of expected measurements per site,
which was arrived at by monitoring trends in several weeks of analyses (see
jpl06787.sum for original details).  We now calculate this number on a daily
basis according to the following semi-empirical formula:
             
                             (1 - sin k)      D
            m = 0.227 * T * -------------  * --- * d ,
                             (1 - sin 15)     t

where T is the number of satellites, k is the elevation cutoff in degrees,
D is the total data arc, t is the decimation interval, and d the number of data
types.  [As a reminder, for our AS strategy, k = 20 degrees and d = 1 (phase
only)].

WARNING: FAIR (not ALGO) was used as the reference clock for days 054-056.
WARNING: ALGO was not used as a fiducial (constrained) site for days 054-056. 

JPL LODR TABLE                               GPS week 737 (1994 Feb 20 - Feb 26)
  MJD       LODR     +/-
          (ms/day)
 49403.5    2.24     0.01
 49404.5    2.30     0.02
 49405.5    2.36     0.01
 49406.5    2.45     0.01
 49407.5    2.49     0.01
 49408.5    2.62     0.02
 49409.5    2.68     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 737 (1994 Feb 20 - Feb 26)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49403.5   .12744   .45090   .06949  .00011  .00012  .00000  .0  .13  .00  .00  41 26  0
 49404.5   .13024   .45056   .06681  .00013  .00014  .00000  .0  .02  .00  .00  45 26  0
 49405.5   .13302   .44982   .06413  .00010  .00012  .00000  .0  .05  .00  .00  41 26  0
 49406.5   .13578   .44988   .06144  .00009  .00010  .00000  .0  .06  .00  .00  42 26  0
 49407.5   .13830   .44989   .05876  .00010  .00011  .00000  .0  .08  .00  .00  42 26  0
 49408.5   .13981   .44917   .05608  .00012  .00014  .00000  .0  .05  .00  .00  40 26  0
 49409.5   .14099   .44842   .05340  .00011  .00011  .00000  .0  .08  .00  .00  38 26  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 737:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 737 (1994 Feb 20 - Feb 26)
      94  2 20   94  2 21   94  2 22   94  2 23   94  2 24   94  2 25   94  2 26
prn   3d rss (m)
  1       0.86       0.35       0.47       0.71       0.82       0.49       0.86
  2       0.80       0.69       0.71       1.04       0.77       1.07       1.00
  3       0.50       0.52       0.63       0.55       0.53       0.63       0.43
  4       0.62       0.74       0.33       0.77       0.40       0.81       0.68
  5       1.29       1.12       0.81       0.96       0.97       1.10       0.91
  7       0.57       0.73       0.61       0.75       0.63       0.89       1.02
  9       0.48       0.59       0.38       0.38       0.33       0.76       0.73
 12       0.56       0.58       0.33       0.24       0.29       0.71       0.65
 13       0.92       0.72       0.48       0.53       0.59       0.88       0.98
 14       1.44       1.24       1.17       1.14       0.68       0.70       1.60
 15       0.51       0.40       0.40       0.39       0.38       0.63       0.66
 16       1.54       1.40       1.31       0.97       0.64       1.50       1.96
 17       0.61       0.78       0.57       0.62       0.57       0.97       0.93
 18       0.47       0.52       0.53       0.52       0.57       0.82       1.25
 19       0.60       0.34       0.32       0.46       0.26       0.69       0.72
 20       0.98       0.83       0.54       0.48       0.77       1.15       1.11
 21       0.68       0.60       0.41       0.84       0.92       0.61       0.83
 22       0.97       1.00       0.93       0.64       1.14       1.53       1.41
 23       0.79       1.03       0.91       1.00       0.85       0.98       0.70
 24       0.61       0.43       0.45       0.70       0.24       0.77       0.45
 25       1.05       1.00       1.18       0.48       0.57       1.92       1.60
 26       0.83       0.69       0.79       0.72       0.39       0.81       0.67
 27       0.29       0.49       0.49       0.37       0.32       0.81       0.85
 28       0.84       0.85       1.05       0.86       0.61       0.94       1.4 
 29       0.37       0.67       0.71       0.60       0.61       0.77       0.70
 31       0.74       0.93       0.75       0.65       0.63       0.76       1.02
_______________________
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 20   94  2 21   94  2 22   94  2 23   94  2 24   94  2 25   94  2 26
prn   3d rss (m)
  1       9.5        8.4        7.9        7.4        8.3        9.0        8.4 
  2       9.8       10.2        7.8        7.1        7.7       11.1        5.7 
  3       9.6       11.7       12.4       14.1       12.7       11.7       11.9 
  4      14.9       15.2       13.7       13.3       11.6       11.2       10.1 
  5      11.0        9.3        8.8        7.6        6.5        7.4        8.7 
  7       5.6        5.7        5.6        4.9        4.3        4.2        3.3 
  9       5.1        4.8        4.2        5.0        5.8        4.7        3.8 
 12       2.8        3.1        4.3        5.1        8.2        7.8        7.2 
 13       3.3        4.7        5.2        3.5        5.0        6.0        2.8 
 14       6.2        7.4        7.3        7.1        8.6        5.1        8.5 
 15       3.9        2.6        3.8        3.2        3.3        3.8        4.2 
 16       9.2        6.6        6.2        9.5       10.1        6.1        4.7 
 17       3.9        4.8        4.2        4.1        5.5        3.8        4.4 
 18       6.7       10.8        4.3       10.0        9.2        8.0        6.0 
 19       5.4        4.7        6.7        6.5        5.1        7.1        7.4 
 20       4.2        4.6        5.3        5.0        4.9        4.7        4.5 
 21       7.9        8.1        8.6        8.1        8.2        4.1        3.3 
 22       9.3        8.2        9.6        8.0        5.9       14.7        3.6 
 23      19.1       15.4       15.0       17.0       19.7       21.6       20.3 
 24       5.6        7.9        9.4        9.0        8.8        7.2        5.2 
 25       4.3        5.2        5.4        6.1        4.8        5.3        7.5 
 26       3.0        3.1        3.5        3.4        3.2        3.4        3.5 
 27       7.5        8.7       10.4        9.0        7.4        7.2        6.3 
 28       5.8        3.6        3.7        3.9        4.2        3.7        3.4 
 29       4.6        4.4        4.8        4.2        2.8        2.6        2.7 
 31       4.9        5.0        5.1        4.8        4.2        5.1        4.2 
_______________________
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 737 (1994 Feb 20 - Feb 26)
      94  2 20   94  2 21   94  2 22   94  2 23   94  2 24   94  2 25   94  2 26
Fiducial 10.4        9.9        9.4        9.4        8.7        8.9       10.1
Total    34.7       37.5       35.6       35.8       34.7       31.4       29.3
END SITE SUMMARY TABLE

JPL GROUND STATION INCLUSION TABLE           GPS week 737 (1994 Feb 20 - Feb 26)
      94  2 20   94  2 21   94  2 22   94  2 23   94  2 24   94  2 25   94  2 26
site    % data
ALBH      105        105        106         95        107        106        103
ALGO*     104         94         93         51          0         44        101
AREQ        0        107          0          0          0          0          0
BRMU       85         89         91         86         96         85         85
DRAO      108        108        108         97        109        109         98
FAIR*      84         77         74         80         79         64         71
FORT        0         98         99        102         44         91         94
GODE       99         99        100        102        101        101         98
GOLD^      89         88         79         80         82         75         77
GRAZ       82         78         78         82         92         75          0
HART*      69         66         92         85         80         52         86
HERS       83         79          0         84         79         49         72
HOBA      103        102         98         97         88         97        101
JPLM       85         82         77         90         76         76         67
KIRU      105        102        101        104         94          0          0
KOKB*      84         87         99         99         77         78         72
KOSG*      93         25          0          0          0          0         10
KOUR       95         99         98         98         89          0          0
MADR*      79         83         75         37         29         67         68
MASP       92         97         99        100         90          0          0
MATE       71         65         62         42         51         60          0
MCMU       24         92         96         95         96         83         64
MDO1      105        104        107        104        103         83         86
METS       80         71         85         86         88         85         82
NLIB       75         85         88         85         85         78         44
NYAL      105        111        111        112        112        110        108
ONSA       91        101         91          0         85         83          0
PAMA       86         86         89         90         84         72         83
PIE1       92         96        102        103        103        101         98
QUIN       92        101         82         95        104        105        101
RCM5      101         97         94        104        104         73         17
SANT*      88         86         80         78         82         73         72
STJO       99        102        102        102        100         85         80
TAIW       80         70         86         88         84         92         72
TIDB*      85         81         74         73         76         70         90
TROM*       0         60        105        107        107        105        102
TSKB        0         33         82        108        106        106        104
USUD      105        108        103        102         98         95         94
VNDP       82         93         88         82         31         52         71
WEST      103        100        100        102        103        100        100
WETT*      80         65          0         73         80         76         72
YAR1*      86         70         77         84         81         83         89
YELL*     100        104         93         96         98        102        101
_______________________
*Indicates fiducial site; #indicates deweighted site.
^GOLD used as a fiducial for days 051-053, 057 only.
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 737 (1994 Feb 20 - Feb 26)
      94  2 20   94  2 21   94  2 22   94  2 23   94  2 24   94  2 25   94  2 26
comp log10(rms/ps)
PRN01     4          4.1        6          4          3.6        8.2        8.2
PRN02     4.1        3.9        6          4          5.7        8.2        8.2
PRN03     4.2        4.5        6          4          5.1        8.2        8.2
PRN04     4.1        4.2        6          4          5.3        8.2        8.2
PRN05     4.0        4.3        6          4          5.4        8.2        8.2
PRN07     3.8        4.0        6          4          5.5        8.2        8.2
PRN09     4.2        4.2        6          4          5.7        8.2        8.2
PRN12     4.4        4.0        6          3          5.4        8.2        8.2
PRN13     4.5        4.4        6          4          5.3        8.2        8.2
PRN14     4.2        4.0        6          4          4.1        8.2        8.2
PRN15     3.7        4.4        6          5          5.5        8.2        8.2
PRN16     4.0        4.3        6          4          5.2        8.2        8.2
PRN17     4.4        4.4        5          4          4.9        8.2        8.2
PRN18     4.0        4.2        6          3          3.7        8.2        8.2
PRN19     3.9        3.8        6          3          5.1        8.2        8.2
PRN20     4.0        4.2        6          4          5.2        8.2        8.2
PRN21     3.8        4.3        6          3          4.9        8.2        8.3
PRN22     4.2        4          6          3          3.9        8.3        8.2
PRN23     3.9        3.9        6          3          5.1        8.2        8.2
PRN24     4.2        4.3        6          4          5.2        8.2        8.2
PRN25     3.9        4          6          4          3.4        8          8.2
PRN26     4.0        3.9        6          3          5.1        8.2        8.2
PRN27     3.6        3.9        6          3          5.4        8.2        8.2
PRN28     3.8        4          6          3          4.7        8          8  
PRN29     4.1        4.3        6          4          4.9        8.2        8.2
PRN31     3.8        3.8        6          4          4.9        8.2        8.2
ALBH      3.6        4.0        6          4          5          8.2        8.2
BRMU      3.4        3.6        6          4          4.9        8.2        8.2
CANB      4.1        4.3        6          4          5.0        8.2        8.2
FAIR      4.0        3.9                                                    4  
FORT                 4          6          4          4          8.2        8.2
GODE      3.7        3.9        6          4          5.0        8.2        8.2
GOLD      3.9        4.1        6          3          5.4        8.2        8.2
GRAZ      4          4.2        6          4          3.9        5             
HART      4          4          6          4          3.8        8          8.2
HARV      3.8        4.0        6          4          5.2        8.2        8.2
HERS      3.8        3                     4          5.2        8.2        8.2
HOBA      4.2        4.3        6          4          5.2        8.2        8.2
JPLM      3.6        3.9        6          4          5.4        8.2        8.2
KIRU      4          3.9        6          4          4                        
KOKB      4.3        4.0        6          3          4.3        8.2        8.2
KOSG      3.7        4                                                      4  
KOUR      4.1        4.1        6          4          3                        
MADR      3.6        3.8        6                     5          8.2        8.2
MASP      4.0        4.2        6          4          4                        
MATE      4          4.0        6                     5          5             
MCMU      4          4.2        6          4          5.2        8.2        8  
MDO1      3.5        4.0        6          4          5.4        8.2        8.2
METS      3.8        4.2        6          4          4.3        8.2        8.2
NALL      3.7        4.1        6          3          5.3        8.2        8.2
NLIB      3.9        3.8        7          4          6.8        8.2        8  
ONSA      3.7        4                                5          6             
PAMA      4.4        4.4        6          4          5.3        8.2        8.2
PENT      3.7        4.1        6          4          5          8.2        8.2
PIE1      3.5        3.8        6          4          5.4        8.2        8.2
QUIN      3.5        3.9        6          3          5.2        8.2        8.2
RCM5      3.9        4.1        6          4          4.8        6          4  
SANT      3.9        4.2        6          3          5.3        8.2        8.2
STJO      4.3        4.1        6          4          5.1        6          8.2
TAIS      4          4.3        6          4          5.4        8.2        8  
TROM                 4          6          3          4.2        8.2        8.2
TSKB                            6          4          4.7        8.2        8.2
USUD      4.0        4.1        6          4          4.7        8.2        8.2
VNDP      3.9        4.1        6          4          3          8          8.2
WEST      3.6        4.0        6          4          4.9        8.2        8.2
WETB      3.7        4                     4          4.9        8.2        8.3
YAR1      4.1        4.3        6          4          5.4        8.2        8.2
YELL      3.9        4.0        6          4          5.4        8.2        8.2
_______________________
END CLOCK REPEATABILITY TABLE