Subject: [IGSREPORT-0732] JPL Analysis Report (week 729)
From: David C. Jefferson
Date: Mon, 24 Jan 1994 11:29:33 PST

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IGS Electronic Report    Mon Jan 24 11:29:33 PST 1994      Message Number 0732
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Author: David C. Jefferson
Subject: JPL Analysis Report (week 729)

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                       JPL ANALYSIS REPORT GPS-WEEK 0729                                       (DAYS 1993/360-1994/1, DATES 26-12-93 TO 01-1-94)
******************************************************************************

Submitted by the JPL IGS/FLINN Analysis Team:

J F Zumberge, D C Jefferson, M B Heflin, 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/0729.  These files have also been sent to the CDDIS.

______________________________________________________________________________
filename               contents
______________________________________________________________________________
jpl07297.sum           This text file.
jpl07297.erp           Earth rotation parameters for GPS week 729.
jpl0729[0-6].sp3       GPS ephemerides for GPS week 729, sp3 format.
______________________________________________________________________________

Beginning January 1, 1994,  we are using the ITRF92 site coordinates and the
ITRF92 velocity field for sites used in our global analyses.  The official
ITRF92 coordinates and velocities were modified according to the two updates by
Zuheir Altamimi; see IGS Mail Messages #421 and #430.  Additionally, we now
constrain 13 sites as fiducials instead of 8, which were agreed upon at the IGS
Analysis Center Workshop in Ottawa, Canada (October, 1993).

We separately analyzed days 001 and 002 (Jan 1, 2; Jan 2 not shown in this
report) using coordinates from both the new and old terrestrial reference
frames (ITRF92 w/13 constrained sites; ITRF91 w/8 constrained sites). In order
to expedite processing, a well-distributed subset of 25 sites was used for these
comparisons.  The following offsets were computed between the two strategies
(ITRF92-ITRF91):
                                              Jan 1   Jan 2
                                             ------- -------
              X-POLE                [mas] =   -0.82   -0.83
              Y-POLE                [mas] =   -0.21    0.14
              ORBITS        (3d-rms)  [m] =    0.15    0.16
              SITE POSITION (3d-rms) [cm] =    2.5     2.6

Based on these results, previous days which had not yet been analyzed were
processed using the new reference frame.  It should also be noted here that
as some of these days were processed after the occurence of the Northridge
Earthquake (Jan 17, 1994), the position of GOLD (Goldstone, California) was
estimated, not constrained, for further studies of effected local ground motion.

WARNING: Because of the Northridge Earthquake (day 1994/017), GOLD was not used          as a fiducial (constrained) site for days 1993/360-362, and 365.

JPL LODR TABLE                          GPS week 729 (1993 Dec 26 - 1994 Jan 01)
  MJD       LODR     +/-
          (ms/day)
 49347.5    2.55     0.04
 49348.5    2.53     0.04
 49349.5    2.38     0.04
 49350.5    2.47     0.04
 49351.5    2.47     0.04
 49352.5    2.39     0.04
 49353.5    2.40     0.04
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 729 (1993 Dec 26 - 1994 Jan 01)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49347.5   .00283   .47737   .21176  .00013  .00014  .00000  .0  .04  .00  .00  30 26  0
 49348.5   .00372   .47743   .20926  .00012  .00013  .00000  .0 -.01  .00  .00  30 26  0
 49349.5   .00481   .47742   .20674  .00011  .00013  .00000  .0 -.01  .00  .00  30 26  0
 49350.5   .00587   .47676   .20165  .00011  .00012  .00000  .0  .07  .00  .00  37 26  0
 49351.5   .00746   .47671   .19923  .00013  .00015  .00000  .0  .06  .00  .00  33 26  0
 49352.5   .00981   .47691   .19910  .00012  .00014  .00000  .0 -.02  .00  .00  29 26  0
 49353.5   .01192   .47697   .19656  .00012  .00014  .00000  .0  .06  .00  .00  25 26  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 729:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE           GPS week 729 (1993 Dec 26 - 1994 Jan 01)
      93 12 26   93 12 27   93 12 28   93 12 29   93 12 30   93 12 31   94  1  1
prn   3d rss (m)
  1       0.24       0.24       0.23       0.39       0.45       0.60       0.32
  2       0.17       0.20       0.32       0.39       0.56       0.37       0.26
  3       0.26       0.22       0.28       0.28       0.19       0.46       0.90
  4       0.38       0.37       0.35       0.44       1.38       0.88       0.51
  5       0.45       0.26       0.29       0.73       0.67       0.50       0.92
  7       0.18       0.27       0.37       0.84       0.49       0.95       0.37
  9       0.46       0.46       0.66       0.88       0.88       0.55       0.79
 12       0.64       0.94       0.45       0.27       0.41       0.74       0.37
 13       0.36       0.41       0.32       0.39       0.41       0.70       0.51
 14       0.31       0.85       0.81       0.48       0.59       0.56       0.49
 15       0.14       0.20       0.24       0.24       0.56       0.34       0.42
 16       0.23       0.23       0.25       0.24       0.24       0.40       0.36
 17       0.49       0.37       0.22       0.25       0.18       0.40       0.13
 18       0.28       0.18       0.24       0.25       0.51       0.46       0.17
 19       0.12       0.14       0.22       0.22       0.52       0.95       0.31
 20       0.49       0.35       0.19       0.17       0.26       0.57       0.85
 21       0.44       0.32       0.26       0.58       0.74       0.92       0.61
 22       0.22       0.13       0.13       0.16       0.31       0.32       0.47
 23       0.54       0.41       0.48       0.57       0.72       1.70       0.77
 24       0.34       0.25       0.15       0.24       0.40       0.97       0.32
 25       0.33       0.31       0.32       0.34       0.41       0.21       0.27
 26       0.31       0.51       0.24       0.24       0.53       0.87       0.41
 27       0.12       0.13       0.21       0.31       0.58       0.37       0.38
 28       0.20       0.21       0.31       0.24       0.48       1.27       0.49
 29       0.32       0.28       0.23       0.21       0.35       0.65       0.37
 31       0.24       0.28       0.18       0.30       0.47       1.62       0.55
_______________________
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
      93 12 26   93 12 27   93 12 28   93 12 29   93 12 30   93 12 31   94  1  1
prn   3d rss (m)
  1       5.5        3.5        4.7        5.2        5.0        5.2        5.4 
  2       5.3        3.1        3.4        4.2        5.7        3.7        4.0 
  3      14.0       13.0       13.1       13.3       13.1       12.0       12.24
  4       6.7        7.6        7.4        6.9        8.0        8.7       10.4 
  5       5.9        5.0        5.8        6.8        6.4        4.8        6.1 
  7       4.3        3.8        3.6        4.2        4.8        3.5        3.5 
  9       4.7        4.2        3.9        4.1        4.8        3.9        3.8 
 12       3.0        3.3        4.9        6.4        3.4        3.9        3.3 
 13      10.2        8.6        4.4        7.0        7.0        6.6        9.5 
 14       7.5        3.8        4.3        2.4        4.0        3.6        3.1 
 15       4.0        4.9        4.5        4.4        5.3        4.7        7.5 
 16       5.2        4.5        4.4        5.4        4.6        6.2        3.7 
 17       4.3        5.4        6.8        6.3        6.8        6.3        6.6 
 18      17.4       12.0        4.3        8.9       11.1       11.6       21.1 
 19       5.8        5.6        7.7        4.7        5.0        6.7        4.6 
 20       3.8        4.0        3.4        3.9        4.1        5.8        7.0 
 21       3.3        3.4        2.5        5.2        4.1        2.6        3.1 
 22       9.2        7.9       13.1       11.0       10.6        8.7       10.1 
 23       4.6        7.4        4.4        6.9        4.6        5.1        5.0 
 24       7.0        9.8        9.9        6.9       10.2       13.3       11.4 
 25       7.9        8.9        8.4        9.2        8.3        8.2        8.4 
 26       7.1        6.8        6.8        6.4        5.8        5.6        5.0 
 27       8.1        8.0        9.4       10.5       10.8        8.7       10.8 
 28       2.9        3.3        4.2        4.0        3.7        3.8        3.9 
 29       6.9        5.5        6.2        5.5        4.3        7.0        7.0 
 31       6.9       10.0        6.7        6.5        5.9        6.1        5.6 
_______________________
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 729 (1993 Dec 26 - 1994 Jan 01)
      93 12 26   93 12 27   93 12 28   93 12 29   93 12 30   93 12 31   94  1  1
Fiducial 12.9       13.3       13.2       13.0       11.6       12.7       13.8
Total    30.2       31.0       32.0       39.1       31.3       30.4       25.2
END SITE SUMMARY TABLE

JPL GROUND STATION INCLUSION TABLE      GPS week 729 (1993 Dec 26 - 1994 Jan 01)
      93 12 26   93 12 27   93 12 28   93 12 29   93 12 30   93 12 31   94  1  1
site    % data
ALBH        0          0          0        111        100          0        112
ALGO*     106        109        110        110         99         76        106
BRMU        0          0          0         90          0          0          0
CASA       96        107        108        104         89         97         97
DRAO      111        114        114        110        101        113          0
FAIR*     118        117        119        118        106        117        116
FORT        0          0          0        114          0          0        113
GOLD^      98         98        100        100         90        100         98
GRAZ        0          0          0        111        111          0          0
HART*     108        111        111        111        101        111        111
HARV      106        106        108        106         93         87        101
HERS        0          0          0        108         97          0          0
HOBA        0          0          0        111          0          0          0
JPLM      111        113        113        113        101        113        112
KIRU        0          0          0        101         92          0          0
KOKB*      97        115        113        111        100        107        113
KOSG*     102        102        101        104         90        103         76
KOUR      105        109        109        109        100        109          0
MADR*     103        107        106        107         98        108        107
MASP      109        111        111        111        100        111          0
MATE        0          0          0        112         91          0          0
MDO1      106        101        105        106         95        104        100
METS        0          0          0         97          0          0          0
NLIB       27         41         44         65         32         91          0
NYAL      113        113        113          0          0          0         15
ONSA        0          0          0        105         95          0          0
PAMA      105        108        107        107         96        105        104
PIE1      105         98        101        107         96        107          0
QUIN       97         83        104         76         86         96         71
RCM5      106        105        107          0          0        108        108
SANT*     111        111        111        112        100        111        112
STJO      109        107        107        108         98        107        105
TAIW       19         43        110          0          0        111          0
TIDB*     110        113        101         90         80         89         89
TROM*     114        116        114          0          0        117        115
USUD      100        106        109        111         92         95        105
VNDP      108        111        112        111        100        111          0
WEST        0          0          0        107         97          0          0
WETT*     111        111        110        110         99        110        110
YAR1*     108        106        111        112        100        112        112
YELL*     103        112        115        114        102        112        115
_______________________
*Indicates fiducial site; #indicates deweighted site.
^GOLD used as a fiducial for days 1993/363,364 and 1994/001 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 729 (1994 Dec 26 - Jan 01)
      93 12 26   93 12 27   93 12 28   93 12 29   93 12 30   93 12 31   94  1  1
comp log10(rms/ps)
PRN01     2.7        2.9        2.6        2.9        2.9        3          2.3
PRN02     2.3        2.6        2.7        2.7        2.4        3          2.8
PRN03     2.6        2.1        2.5        2.7        2.8        2          2.9
PRN04     2.8        2.7        2.8        2.8        3.5        3          3.0
PRN05     2.4        2.7        2.9        3.2        3.1        3          3.4
PRN07     2.4        2.9        2.8        2.8        2.9        3          3.0
PRN09     2.7        2.9        2.8        3.0        2.8        3          3.1
PRN12     3.1        3          2.6        2.6        2.9        3          2.9
PRN13     2.9        2.6        2.6        2.3        2.9        3          2.7
PRN14     2.8        3.1        2.9        2.7        2.7        3          2.9
PRN15     2.5        2.9        2.6        2.8        3.1        3          3.0
PRN16     2.2        2.7        2.6        2.7        3.0        3          2.8
PRN17     2.8        2.9        2.9        2.7        2.7        3          2.8
PRN18     2.5        2.6        2.6        2.4        2.6        2          2.7
PRN19     2.5        2.4        2.5        2.6        2.9        3          3.1
PRN20     2.6        2.6        2.8        2.8        2.7        3          2.8
PRN21     2.8        2.8        2.9        3.0        2.8        3          2.8
PRN22     2.8        2.8        2.4        2.5        2.7        2          2.8
PRN23     2.8        2.6        2.6        2.8        2.7        3          2.7
PRN24     2.9        2.8        2.8        2.6        3.1        2          2.8
PRN25     2.8        3.1        2.8        2.9        2.5        2          2.8
PRN26     2.5        2.4        2.9        3.0        2.9        3          2.7
PRN27     2.8        2.7        2.6        2.8        2.9        3          2.9
PRN28     2.2        3.0        2.8        2.6        2.8        3          2.8
PRN29     2.5        2.6        2.3        2.2        2.7        2          2.9
PRN31     2.6        2.8        2.6        2.5        2.6        3          3.0
ALBH                                       2          2                     3  
CANB      2.4        2.8        2.6        2.7        2.6        2          2.9
CASA      2.8        3.0        2.9        2.9        2.8        3          2.9
FAIR      2.5        2.5        2.1        2.2        2.5        2          2.6
FORT                                                                        2  
GOLD      2.2        2.4        2.3        2.0        2.5        2          2.6
GRAZ                                       2          1                        
HART      2.4        2.6        1.9        2.5        2.7        2          2.8
HARV      2.2        2.4        2.4        2.5        2.4        3          2.7
HERS                                       3          3                        
JPLM      1.9        2.4        2.2        1.9        2.3        2          2.5
KIRU                                       2          2                        
KOKB      3.3        3.8        3.7        4.1        4.3        3          3.9
KOSG      2.2        2.1        2.3        1.9        2.3        2          3  
KOUR      2.9        2.9        2.9        2.4        3.1                      
MADR      2.4        2.5        2.1        2.0        2.2        2          2.4
MASP      3.2        3.2        3.2        3.3        2.8                      
MATE                                       2          2                        
MDO1      2.8        3.0        2.7        2.7        2.8        3          2.6
NALL      1.8        1.8        2                                           3  
NLIB      3          3.1        3.0        3.0        1.9                      
ONSA                                       3          3                        
PAMA      2.3        2.7        2.5        2.0        2.6        2          2.8
PENT      2.1        2.2        2.0        2.2        2.4                      
PIE1      2.6        2.8        2.6        2.6        2.5                      
QUIN      2.6        2.8        2.6        3.0        2.7        3          2.7
RCM5      2.6        2.7        2                                3          2.6
SANT      2.3        2.8        2.8        2.8        2.8        3          2.9
STJO      3.5        3.5        3.0        2.5        3.6        3          3.1
TAIS      2          3          3                                              
TROM      2.4        2.3        3                                3          2.4
USUD      1.9        2.6        2.1        2.4        2.7        2          2.1
VNDP      2.2        2.5        2.4        2.4        2.5                      
WEST                                       3          2                        
WETB      2.2        2.4        2.2        2.2        2.4        2          2.3
YAR1      2.0        2.5        2.1        2.7        2.7        2          2.7
YELL      2.5        2.0        1.9        2.0        2.3        2          2.7
_______________________
END CLOCK REPEATABILITY TABLE