Subject: [IGSREPORT-487] JPL07127.SUM
From: G. Blewitt
Date: 13 SEP 1993 19:12:05

***********************************************************************
IGS Electronic Report     13-SEP-1993 19:12:05       Message Number 487
***********************************************************************

From: G. Blewitt
Subj: JPL07127.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
______________________________________________________________________________
jpl07127.sum           This text file.
jpl07127.erp           Earth rotation parameters for GPS week 712.
jpl07120.sp1,sp3       GPS ephemerides for Sun, Aug 29, sp1 and sp3 formats
jpl07121.sp1,sp3       GPS ephemerides for Mon, Aug 30, sp1 and sp3 formats
jpl07122.sp1,sp3       GPS ephemerides for Tue, Aug 31, sp1 and sp3 formats
jpl07123.sp1,sp3       GPS ephemerides for Wed, Sep 01, sp1 and sp3 formats
jpl07124.sp1,sp3       GPS ephemerides for Thu, Sep 02, sp1 and sp3 formats
jpl07125.sp1,sp3       GPS ephemerides for Fri, Sep 03, sp1 and sp3 formats
jpl07126.sp1,sp3       GPS ephemerides for Sat, Sep 04, sp1 and sp3 formats
                       (no PRN29)
______________________________________________________________________________

According to the file gpsn3.txt obtained from tycho.usno.navy.mil, PRN02/GPS13
was scheduled unusable on day 242 (August 30) from 10:45 UT for up to 12 hours
for repositioning.  Also, PRN03/GPS11 and PRN27/GPS27 were scheduled unsuable
for various periods on days 245 and 246 (September 2,3).  We have therefore
deweighted data from these satellites on the relevant days in accordance with
the NANU messages; see warnings below.

Broadcast ephemeris data AND tracking data were not available for PRN29/GPS29
on day 247 (September 4).  According to the aforementioned NANU file, this
satellite is unusable from day 246 09:18 to day 251 22:16 UT. Hence, it is
absent from our orbit repeatability and broadcast comparison tables for this
day (247) only.

Tracking data from TIDB (Tidbinbilla, Australia) proved to be corrupt for the
analysis of day 242.  All data from this site were excluded for this day's
processing. Additionally, due to the absence of data from ALGO (Algonquin Park,
Canada) on day 245 (September 2), we have changed our reference clock to FAIR
(Fairbanks, Alaska) for that day ONLY.

WARNING: Due to the maneuver of PRN02/GPS26, data from this satellite have been          deweighted for day 242 (August 30, 1993).
WARNING: Data from PRN03/GPS11 have been deweighted for days 245, 246 (Sep 2, 3)
WARNING: Data from PRN27/GPS27 have been deweighted for day 246.
WARNING: Data from TIDB has been excluded for the analysis of day 242.
WARNING: FAIR (instead of ALGO) was used as the reference clock for day 245.

JPL LODR TABLE                               GPS week 712 (1993 Aug 29 - Sep 04)
  MJD       LODR     +/-
          (ms/day)
 49228.5    1.64     0.05
 49229.5    1.70     0.05
 49230.5    2.05     0.05
 49231.5    1.91     0.05
 49232.5    2.31     0.06
 49233.5    2.63     0.06
 49234.5    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 712 (1993 Aug 29 - Sep 04)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49228.5  -.09963   .31132   .50598  .00013  .00014  .00000  .0  .06  .00  .00  41 24  0
 49229.5  -.09923   .31360   .50426  .00013  .00013  .00000  .0  .03  .00  .00  40 24  0
 49230.5  -.09872   .31527   .50252  .00013  .00014  .00000  .0  .07  .00  .00  40 24  0
 49231.5  -.09875   .31734   .50077  .00013  .00014  .00000  .0  .08  .00  .00  40 24  0
 49232.5  -.09832   .31860   .49901  .00017  .00019  .00000  .0 -.01  .00  .00  35 24  0
 49233.5  -.09867   .32105   .49724  .00015  .00018  .00000  .0  .11  .00  .00  37 24  0
 49234.5  -.09813   .32270   .49546  .00015  .00016  .00000  .0  .07  .00  .00  35 23  0
END UTPM TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 712:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 712 (1993 Aug 29 - Sep 04)
      93  8 29   93  8 30   93  8 31   93  9  1   93  9  2   93  9  3   93  9  4
prn   3d rss (m)
  1       0.29       0.25       0.20       0.49       0.63       0.36       0.29
  2       8.35   #3741.58    3772.71       0.91       0.67       0.88       0.71
  3       0.50       0.30       0.48      11.13   #1700.46   #1372.15      20.58
  7       0.34       0.30       0.23       0.55       0.55       0.59       0.26
  9       0.22       0.22       0.26       0.61       0.67       0.39       0.31
 12       0.41       0.41       0.30       0.62       1.26       0.41       0.19
 13       0.16       0.20       0.19       0.73       0.66       0.63       0.31
 14       0.41       0.32       0.30       0.57       0.52       0.72       0.24
 15       0.35       0.21       0.18       0.73       0.54       0.59       0.23
 16       0.53       0.17       0.28       0.37       0.94       0.41       0.53
 17       0.33       0.16       0.30       0.73       0.71       0.64       0.41
 18       0.37       0.32       0.48       0.53       0.49       0.58       0.64
 19       0.32       0.30       0.27       0.66       0.74       0.59       0.25
 20       0.44       0.35       0.60       0.99       0.62       0.88       0.48
 21       0.32       0.28       0.42       0.68       0.74       0.36       0.18
 22       0.53       0.26       0.32       0.42       0.47       0.65       0.47
 23       0.16       0.14       0.33       0.56       0.66       0.46       0.27
 24       0.30       0.24       0.24       0.45       0.69       0.81       0.65
 25       0.39       0.21       0.36       0.42       0.59       0.48       0.24
 26       0.20       0.20       0.20       0.61       0.87       0.45       0.12
 27       0.32       0.25       0.25       8.20      #8.06       5.86       0.66
 28       0.21       0.19       0.17       0.36       0.57       0.54       0.16
 29       0.35       0.32       0.38       0.56       2.03       1.0       (n/a)
 31       0.32       0.22       0.32       0.40       0.51       0.52       0.16
_______________________
#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  8 29   93  8 30   93  8 31   93  9  1   93  9  2   93  9  3   93  9  4
prn   3d rss (m)
  1       5.4        5.3        5.4        4.9        5.2        5.9        4.9 
  2      12.0       #4.8     1636.1       21.7       12.2        9.1       10.8 
  3      10.6       10.1       13.8        8.7       #2.9       #3.9       13.9 
  7       9.5        9.0        8.4       10.5       11.0        7.8       10.5 
  9       4.7        5.4        6.6        6.0        4.1        7.4        3.4 
 12       6.1        4.2        2.9        4.0        3.9        3.0        5.1 
 13       8.7        6.2        6.0        6.8        5.2        7.9        4.9 
 14       7.0        6.5        5.4        6.3        6.5        8.1        7.3 
 15       3.0        6.5        7.2        5.6        4.8        8.4        7.8 
 16      11.4       10.0       11.1       10.6       10.9       12.3       11.4 
 17       6.9        5.2       12.4        3.7        8.6       10.0       11.1 
 18       5.8        6.6        9.8       11.1       12.6        7.0        8.7 
 19       6.9        5.0        3.5        3.2        3.1        3.6        3.4 
 20       3.7        3.7        3.9        3.2        4.1        5.5        4.7 
 21       7.6       10.7        8.8       10.4       10.2       10.2        9.6 
 22       7.3        6.4       10.0       10.7        9.7       14.0       12.9 
 23       6.0        9.8       16.7       16.3       22.0       23.7       28.1 
 24       0.0        7.1        6.3        9.6        8.1       14.8        7.2 
 25       4.9        4.7        6.3        7.3        7.5        8.1        9.9 
 26       5.5        6.4        5.4        4.3        4.2        4.7        5.2 
 27       5.9        6.7        6.1        6.4       #2.9        6.9        7.1 
 28       4.8        2.6        5.1        5.3        7.1        5.7        5.5 
 29       6.9        7.5        6.7        6.5        6.3        6.3       (n/a)
 31       7.3        5.5        5.2        5.3        5.5        4.9        6.5 
_______________________
#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 712 (1993 Aug 29 - Sep 04)
      93  8 29   93  8 30   93  8 31   93  9  1   93  9  2   93  9  3   93  9  4
Fiducials 8.0        8.0        7.4        7.2        5.8        6.6        7.5
Total    38.7       36.6       36.6       36.3       27.9       31.6       30.6
END SITE SUMMARY TABLE

JPL GROUND STATION INCLUSION TABLE           GPS week 712 (1993 Aug 29 - Sep 04)
      93  8 29   93  8 30   93  8 31   93  9  1   93  9  2   93  9  3   93  9  4
site    % data
ALBH      110        107        110         96          0         88        101
ALGO*     110        107        107         92          0         88        104
BRMU      105         70         96        107         88         57          0
DRAO      113        109        112         99          0         90        104
FAIR*      92         89         90         89         86         84         87
FORT      115         83          0          0          0         98          0
GOLD       99         97         79         85         83         84         85
GRAZ      106         87        103         94         56         87         59
HART*     105         99        104         96         96         98        100
HERS      105        101        107        106         97         98         93
HOBA       97         92         98         99         97         94          0
JPLM      112        108        111        109        102        100        104
KIRU       96         89        100        104         95         93         85
KOKB*      89         85         83         42         40        101        105
KOSG      108         98        105        106         95         96        104
KOUR      112        110        111        112        101         99         94
MADR*     105        102        109        108         97        101        106
MASP      110        104        110        108        100        102         96
MATE       97         82         89         98         87         80          0
MCMU       34        106        111        117         91        113        113
MDO1       96        101        106        105         89          0         91
METS      109        104        109        108         99        100        107
NLIB      101        100        102        102         96         91         88
NYAL       18         15          4          1          6         20         29
ONSA      111        104        111        105         98         99        107
PIE1      106        101        106         98         83         79         84
PINY       93         89         92         92         86         83         88
QUIN       85          0         27         70         33          0          0
RCM4      111        107         99        107         90          0          0
SANT*     110        107         99        106         58          0         41
STJO      109        106        110         97          0         88        100
TAIW       91         77          0         82         84         86          0
TIDB      106          0        105        104         95         98         98
TROM*     107        102         45         71        105         84         99
USUD       85         98         97         92          0          0         79
VNDP      111        108         99        109        102        100        104
WEST        0         95        110        106         98         95        101
WETT      107        102         94          0         62         94         93
YAR1*      81        107         99        111         97        100        104
YELL      113        113        110         98          0         92        107
_______________________
*Indicates fiducial site; #indicates deweighted site.
END GROUND STATION INCLUSION TABLE