Subject: [IGSREPORT-516] JPL07147.SUM
From: G. Blewitt
Date: 29 SEP 1993 08:42:53

***********************************************************************
IGS Electronic Report     29-SEP-1993 08:42:53       Message Number 516
***********************************************************************

From: G. Blewitt
Subj: JPL07147.SUM
------------------

Submitted by

D C Jefferson, J F Zumberge, G Blewitt, M B Heflin, F H Webb

all at the Jet Propulsion Laboratory, California Institute of Technology, 
Pasadena, CA  91109.

The following files have been posted on BODHI (for access to BODHI contact
[email-masked]):

______________________________________________________________________________
filename               contents
______________________________________________________________________________
jpl07147.sum           This text file.
jpl07147.erp           Earth rotation parameters for GPS week 714.
jpl07147.sp1           GPS ephemerides for GPS week 714, sp1 format.
jpl07147.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

Anti-spoofing was in effect for Sep 17-20.  Because of unmodeled biases in
pseudorange observables from a Rogue operating in cross-correlation mode
(typical during AS periods), we use a new no-pseudorange analysis strategy
for this period.  Pseudorange data are still used in the data-editing step, but
are _not_ used in the parameter-estimation step (as evidenced by the near-50%
values in the Ground Station Table for days 260 and 261).  An elevation cutoff
of 20 degrees is used, and an a priori uncertainty of 300 m is assumed for phase
biases.  The a priori values of the phase biases are based on the pseudorange
in the data-editing step.  Finally, solar radiation pressure parameters are
model as constant rather than stochastic.

Data from TIDB (Tidbinbilla, Australia), GOLD (Goldstone, CA, USA), and MADR
(Madrid, Spain) from Sep 16 (day 259) were not used (see IGS Message Number
341).  Also, data from WETT were excluded from the analyses of days 260 and 261
(Sep 17,18), as were data from ONSA (Onsala, Sweden) and PINY (Pinyon Flats,
CA ) on days 261 and 262 respectively.  Data from these sites and days are not
well modeled.

WARNING: Data from CANB, GOLD, and MADR were excluded for day 259 (Sep 16).
WARNING: Data from WETT were excluded for days 260 and 261 (Sep 17,18).
WARNING: Data from ONSA were excluded for day 261.
WARNING: Data from PINY were excluded for day 262 (Sep 19).

JPL LODR TABLE                               GPS week 714 (1993 Sep 12 - Sep 18)
  MJD       LODR     +/-
          (ms/day)
 49242.5    2.22     0.05
 49243.5    2.27     0.05
 49244.5    2.30     0.05
 49245.5    2.23     0.05
 49246.5    2.27     0.05
 49247.5    2.42     0.06
 49248.5    2.40     0.06
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 714 (1993 Sep 12 - Sep 18)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49242.5  -.09904   .33607   .48072  .00014  .00015  .00000  .0  .06  .00  .00  38 24  0
 49243.5  -.09831   .33876   .47882  .00014  .00014  .00000  .0  .06  .00  .00  39 24  0
 49244.5  -.09731   .34101   .47690  .00013  .00014  .00000  .0  .05  .00  .00  42 24  0
 49245.5  -.09657   .34348   .47497  .00013  .00014  .00000  .0  .05  .00  .00  42 24  0
 49246.5  -.09618   .34570   .47302  .00015  .00016  .00000  .0  .05  .00  .00  39 24  0
 49247.5  -.09618   .34811   .47106  .00019  .00020  .00000  .0  .05  .00  .00  38 24  0
 49248.5  -.09442   .35140   .46909  .00019  .00020  .00000  .0  .00  .00  .00  39 24  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 714:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 714 (1993 Sep 12 - Sep 18)
      93  9 12   93  9 13   93  9 14   93  9 15   93  9 16   93  9 17   93  9 18
prn   3d rss (m)
  1       0.26       0.26       0.20       0.22       0.24       0.39       0.55
  2       0.41       0.46       0.48       0.53       0.58       1.11       0.82
  3       0.35       0.35       0.34       0.37       0.53       0.77       0.71
  7       0.24       0.26       0.12       0.13       0.24       0.65       1.02
  9       0.11       0.18       0.16       0.22       0.29       0.21       0.48
 12       0.13       0.15       0.15       0.23       0.39       0.45       0.53
 13       0.29       0.25       0.33       0.26       0.41       0.46       0.41
 14       0.41       0.37       0.19       0.20       0.42       0.65       0.85
 15       0.32       0.29       0.16       0.15       0.33       0.76       0.80
 16       0.30       0.36       0.35       0.45       0.44       1.39       1.99
 17       0.20       0.34       0.13       0.17       0.28       0.60       0.80
 18       0.35       0.31       0.25       0.24       0.27       0.76       1.00
 19       0.47       0.40       0.48       0.31       0.36       0.45       0.71
 20       0.35       0.33       0.41       0.40       0.29       1.18       1.00
 21       0.24       0.18       0.13       0.14       0.27       0.50       0.44
 22       0.33       0.37       0.30       0.42       0.55       0.54       1.51
 23       0.19       0.11       0.16       0.18       0.33       0.81       0.67
 24       0.16       0.31       0.18       0.27       0.51       0.99       1.52
 25       0.48       0.39       0.27       0.35       0.37       0.59       1.10
 26       0.12       0.14       0.18       0.24       0.35       0.67       0.70
 27       0.18       0.23       0.39       0.33       0.31       0.62       0.76
 28       0.15       0.21       0.19       0.15       0.17       0.70       0.39
 29       0.36       0.22       0.36       0.16       0.21       0.55       0.49
 31       0.22       0.14       0.26       0.27       0.30       0.53       0.44
_______________________
#Indicates deweighted satellite.
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  9 12   93  9 13   93  9 14   93  9 15   93  9 16   93  9 17   93  9 18
prn   3d rss (m)
  1       7.4        6.0        5.3        5.4        5.0        5.2        5.7 
  2      12.5       13.5       11.7       11.7       12.1       14.6       13.9 
  3       5.5        5.3        9.9        6.5        4.8        5.3        4.7 
  7       7.8        7.9        5.7        7.7        6.8        8.2        8.3 
  9       5.6        3.5        3.4        4.1        6.4        6.3        2.8 
 12       1.8        2.3        2.5        3.3        3.4        2.6        3.6 
 13       5.9        4.0        4.3        3.03       4.5        5.4        7.7 
 14       6.6        6.0        7.5        7.7        7.9        5.8        6.6 
 15       4.4        2.9        2.1        3.4        5.1        6.2        6.4 
 16      13.4       15.5       10.9       10.8        7.8       10.2        9.7 
 17       4.4        3.6        3.2        4.7        3.4        3.9        4.2 
 18       6.2        9.2        8.7        8.0        5.4        5.8        9.2 
 19       3.6        3.7        4.6        4.3        3.4        4.0        4.3 
 20       4.0        3.2        3.7        4.9        4.3        3.8        3.7 
 21      11.0        7.7        6.3        4.8        5.9        4.3        4.5 
 22      10.0        8.7       10.3        9.9        8.7        7.6        7.6 
 23       6.3       12.3       11.8        4.4       30.1       48.9       15.4 
 24      11.4       11.6        9.1        8.0        7.8       10.0       11.5 
 25       6.1        4.6        4.4        3.2        2.5        2.9        2.9 
 26       5.7        4.4        2.9        2.8        2.7        3.0        4.0 
 27       6.0        7.8        7.7        4.9        4.3        4.7        6.7 
 28       3.0        1.9        4.0        3.0        3.9        3.2        2.3 
 29       7.9        4.8        4.9        5.6        5.6        5.3        6.2 
 31       7.8        6.8        5.4        6.0        6.7        4.9        4.6 
_______________________
#Indicates deweighted satellite.
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 714 (1993 Sep 12 - Sep 18)
      93  9 12   93  9 13   93  9 14   93  9 15   93  9 16   93  9 17   93  9 18
Fiducials 7.5        7.9        8.4        8.3        6.7        6.4        6.4
Total    35.3       36.1       39.4       38.6       35.0       32.5       31.3
END SITE SUMMARY TABLE

JPL GROUND STATION INCLUSION TABLE           GPS week 714 (1993 Sep 12 - Sep 18)
      93  9 12   93  9 13   93  9 14   93  9 15   93  9 16   93  9 17   93  9 18
site    % data
ALBH      108        109        109        107        100         48         47
ALGO*     108        108        108         93         85         42         42
BRMU       73        104        105         70         76         47         41
DRAO       97        113        111        109        102         48         48
FAIR*       0         35         86         90         83          0          5
FORT       58         95        103         68        105          0         37
GOLD       77         81         96         96          0         46         44
GRAZ      107        107        107        108         99         48         45
HART*     103        104        105        106         98         44         44
HERS      106         78        103        102         96          0         41
HOBA      103         33         26         87         79         47         46
JPLM      105        106        110         98        102         44         48
KIRU       99         94        102        104         99         46         45
KOKB*     109        110        110        109        100         47         47
KOSG       94         85         82         15         59         46         45
KOUR      107        112        113        113        103         45         44
MADR*     104        103        104        104          0         45         42
MASP      108        107        110        109        100         48         44
MATE        0          0         95         94         90         43         40
MCMU      115        118        106        118        108         51         51
MDO1        0         91        104         94         95         47         46
METS      108        111        109        110        101         46         40
NLIB       93         90         97         95         93         44         44
NYAL        0          0         41        112        109         43         42
ONSA      106        105        107        105        100         45          0
PIE1       91         89         87         87         81         38         37
PINY       91         93         92         90         83         39         33
QUIN       41         95         93         35         97         46         46
RCM4      105         99        106        109         97         46         48
SANT*     106        108        109        109         99         48         48
STJO      110        108        106         87         91         39         36
TAIW       64         70         89         89         82         40         39
TIDB      106        107        106        108          0         47         45
TROM*     113        116        114        115        109         49         43
USUD       96         98         90         85         79         39         39
VNDP      107        109        110        109        102         49         48
WEST       91          0         88        103         96         42          0
WETT      105         94         75        104         99          0          0
YAR1*     108        109        107        106         97         47         47
YELL      111        112        114        111        105         44         39
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE