Subject: [IGSREPORT-149] JPL Analysis Report
From: James F Zumberge
Date: 22 FEB 1993 00:00:00

From:     James F Zumberge
Subject:  JPL Analysis Report
-----------------------------

Submitted by

J F Zumberge, G Blewitt, M B Heflin, D C Jefferson, 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
______________________________________________________________________________
jpl06827.sum           This text file.
jpl06827.erp           Earth rotation parameters for GPS week 682.
jpl06827.sp1           GPS ephemerides for GPS week 682, sp1 format.
jpl06827.sp3            "       "       "   "   "    " , sp3   "   .
______________________________________________________________________________

Beginning with the analysis of Feb 4, we have changed our data interval
from 5 minutes to 10 minutes, because we have found that the resulting
difference in the orbits, receiver locations, and earth orientation
parameters are small compared to the (estimated) accuracies of these
quantities.

Data from PRN11/GPS08 were deweighted this week, as in recent weeks.
Data from PRN29/GPS29 were also deweighted for the Jan 31 and Feb 1
analyses; beginning with Feb 2, its data are weighted normally.

MCMU data were not used except on Feb 1.

Data from VNDP were de-weighted throughout the week, not because we
suspect they are bad, but rather because VNDP is a relatively new site.

(In general, we remove or deweight data from specific sites in the
event that such data results in unusually large post-fit residuals in
phase and/or pseudorange, or in anticipation of such results.)

We denote the moved antenna at Kokee Park by KOK2 (instead of KOKB).
Data from KOK2 were deweighted for Feb 2 - Feb 5.

WARNING: Data from PRN's 11 and 29 (GPS08 and GPS29) have been deweighted for            some or all of week 682.

JPL LODR TABLE                               GPS week 682 (1993 Jan 31 - Feb 06)
  MJD       LODR     +/-
          (ms/day)
 49018.5    2.62     0.05
 49019.5    2.81     0.05
 49020.5    2.85     0.05
 49021.5    2.79     0.06
 49022.5    2.74     0.06
 49023.5    2.76     0.06
 49024.5    2.77     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 682 (1993 Jan 31 - Feb 06)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 49018.5   .20850   .28111  -.01426  .00014  .00016  .00000  .0  .08  .00  .00  32 21  0
 49019.5   .20751   .27819  -.01674  .00014  .00015  .00000  .0  .05  .00  .00  35 21  0
 49020.5   .20605   .27507  -.01923  .00016  .00017  .00000  .0  .07  .00  .00  34 21  0
 49021.5   .20570   .27246  -.02173  .00019  .00020  .00000  .0  .11  .00  .00  31 21  0
 49022.5   .20596   .26953  -.02424  .00022  .00021  .00000  .0  .05  .00  .00  33 21  0
 49023.5   .20626   .26712  -.02676  .00019  .00018  .00000  .0  .04  .00  .00  34 21  0
 49024.5   .20634   .26482  -.02928  .00018  .00018  .00000  .0  .06  .00  .00  34 21  0
END UTPM TABLE

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

JPL ORBIT REPEATABILITY TABLE                GPS week 682 (1993 Jan 31 - Feb 06)
      93  1 31   93  2  1   93  2  2   93  2  3   93  2  4   93  2  5   93  2  6
prn   3d rss (m)
  1       0.45       0.36       0.15       0.42       0.51       0.58       0.49
  2       0.28       0.36       0.28       0.30       0.23       0.29       0.23
  3       0.23       0.51       0.39       0.25       0.11       0.18       0.15
 11       1.95       1.95       1.60       2.63       2.50       1.65       1.52
 12       0.67       0.40       0.67       0.50       0.53       0.35       0.22
 13       0.48       0.61       0.84       0.78       0.81       0.69       0.74
 14       0.24       0.36       0.56       0.87       0.49       0.35       0.43
 15       0.27       0.27       0.34       0.32       0.32       0.19       0.30
 16       0.28       0.39       0.27       0.29       0.24       0.24       0.25
 17       0.16       0.26       0.28       0.36       0.30       0.26       0.30
 18       0.14       0.25       0.25       0.21       0.24       0.27       0.32
 19       0.14       0.27       0.19       0.15       0.23       0.34       0.28
 20       0.34       0.62       0.65       0.64       0.64       0.17       0.35
 21       0.23       0.63       0.23       0.45       0.53       0.50       0.33
 23       0.31       0.57       0.45       0.60       0.40       0.45       0.43
 24       0.33       0.56       0.51       0.47       0.39       0.41       0.42
 25       0.30       0.50       0.49       0.69       0.81       0.15       0.22
 26       0.31       0.34       0.26       0.29       0.16       0.41       0.33
 27       0.23       0.39       0.29       0.37       0.18       0.34       0.24
 28       0.20       0.26       0.24       0.29       0.29       0.12       0.32
 29       0.66       0.56       0.42       0.68       0.54       0.37       0.40
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  1 31   93  2  1   93  2  2   93  2  3   93  2  4   93  2  5   93  2  6
prn   3d rss (m)
  1       4.7        6.0        6.9        6.2        6.9        6.8        5.8 
  2       5.9        6.2        7.0        5.4        7.1        7.1        6.7 
  3       7.6        7.9        8.6        7.1        9.0        9.1        7.6 
 11      21.4       13.0       11.3       16.6       11.9       11.1        9.8 
 12       7.9        9.5       11.4       13.2        7.5       12.8       15.0 
 13       5.8        2.6        6.6        5.8        5.3        4.8        5.3 
 14       4.5        7.3        5.1        5.4        6.7        7.7        5.6 
 15       4.4        7.2        5.3        4.3        6.8        4.9        8.7 
 16       6.2        4.6        5.6        5.9        4.6        3.7        3.5 
 17      12.1       10.5        4.5        4.9        6.9        7.9        6.3 
 18       7.7       11.4       10.4        6.3        9.8        8.6       11.6 
 19       6.8        5.5        3.9        3.7        6.4        3.5        2.8 
 20      10.5       13.0       12.9       14.2       14.1        7.8       11.5 
 21       7.5        3.7        5.0        5.3        5.5        6.9        3.6 
 23       7.7       13.5        8.5        5.6        9.4        7.4        3.9 
 24      18.0       13.8       17.4       19.9       16.1       12.5       14.7 
 25       5.7        6.7        4.5        4.4        5.8        5.4        6.1 
 26       5.9        8.3        7.2        6.4        5.6        6.6        5.9 
 27      14.2       11.6       13.0       12.4        9.4       11.0       11.9 
 28       5.6        5.9        4.2       10.3        0.0        4.2        5.1 
 29      17.0       20.2       17.2       13.8       13.4       16.8       12.0 
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

The following table, as explained in IGS Report No. 99, indicates the amount
of data from each tracking site used in this week's analysis:

JPL GROUND STATION INCLUSION TABLE           GPS week 682 (1993 Jan 31 - Feb 06)
      93  1 31   93  2 01   93  2 02   93  2 03   93  2 04   93  2 05   93  2 06
ALBH        92         93         98        101        102        102        102
ALGO*       89         83         92         96        102        102        102
DRAO        97         98        104        104        105        105        105
FAIR*       89         10         76        106        111        112        111
GOLD        89         90         86         77         96         95         88
GRAZ        97         98        102        101        101        101        101
HART*      101         96         91        105        103        104        102
HARV        95         97         95         21         58         96         99
HERS         0          0          0          0         44         41         68
JPLM        95         95        100        104        103        105        106
KOK2         0          9         92        103        105        104        104
KOKB*       98         87         12          0          0          0          0
KOSG        97         96        102         98         38         71        102
KOUR        94         96        105        105        104        104        101
MADR*       89         89         94         95         94         96         86
MASP        99        100        103         94         61         92        100
MATE        95         97         99         99        101        101        101
MCMU         0         91          0          0          0          0          0
METS        98        101        106        106        106        105        104
NYAL         0         43         11          0         48        120        122
ONSA        78         71         95         91         71         50         93
PAMA        95         95         99         61         93         97         99
PIE1        67         53         98         62          0         34         98
QUIN        97         97         75         93         21         98         96
RCM2        88         87         96         79         85        103        104
SANT*       99         99         94          9         44        105        107
STJO        97         98         98         98         99         98         98
TAIS       100        101        105        105        105        105        105
TIDB        96         94         97         99        101        102         92
TROM*      108         98        111        103         10         48        116
USUD       101        101        104        105        105        106        105
VNDP        27         23          1          0         26         94         10
WETT        92         91         97         94         72         45         86
YAR1*       94         92        102        106        106        106        106
YELL       102        104        111        111        110        110        108
_______________________
*Indicates fiducial site.
END GROUND STATION INCLUSION TABLE