Subject: [IGSREPORT-2328] Wk 0834 JPL Analysis Report
From: D C Jefferson
Date: Tue, 16 Jan 1996 13:28:41 PST

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IGS Electronic Report    Tue Jan 16 13:28:41 PST 1996      Message Number 2328
******************************************************************************

Author: D C Jefferson
Subject: Wk 0834 JPL Analysis Report

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JPL ANALYSIS REPORT   GPS-WEEK 0834 (DAYS 365-6, DATES 1995 Dec 31 - Jan 06)
******************************************************************************

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/0834.  These files have also been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl08347.sum         This text file.
jpl08347.erp         Earth rotation parameters for GPS week 834.
jpl08347.snx         Ground station coordinates for GPS week 834, SINEX format.
jpl0834[0-6].sp3     GPS ephemerides for GPS week 834, sp3 format.
______________________________________________________________________________

Mean Orbit Repeatability (see table below): 20.5 cm

Beginning this week, we add a new step to our site-selection algorithm,
which is based on choosing 37 stations which give the "best" geographical
distribution.  We begin by choosing a site which will be suitable as a
reference clock.  To this we add a well-distributed number of stations, 
currently eight, each of which uses an H-maser frequency reference.  The 
remaining sites are chosen such that the global distribution has small rms 
isolation (subject to the constraint of including IGS fiducials).
 
Also beginning this week, we include data from a previously existing site,
GOL2, a secondary receiver operating at Goldstone (Barstow CA, USA).  Due to
planned experiments, this site is forced into our orbit and clock solution each 
day.  The following nominal coordinates were assumed (same as GOLD):

                     X (m)          Y (m)         Z (m)
               -2353614.1692  -4641385.3888  3676976.4736

Based on atypically high rms values of pseudorange post-fit residuals (on the 
1.0 to 1.5 meter level), we have elected to exclude P-code data from MAS1 and
PAMA from our analyses as of day 002.

Please note that the orbit repeatability table column for day 006 only has one
decimal place of precision.  This is because the analysis of the following day
is not complete as of this writing.

Due to potential problems, data from stations mentioned below were not
considered for use in the global solution for the day indicated.  (For
geographical reasons, they may not have been used in any case.)

WARNING: Data from PRN12 not used on day 1995-365.
WARNING: PIE1 (not ALGO) used as reference clock on days 1996-001 and 002.
WARNING: Data from GOPE, LAMA, MATE, PIN1, TRAK, UPAD excluded day 002.
WARNING: Data from MATE, PAMA, PIN1, SEY1, UPAD excluded day 003.
WARNING: Data from CLAR, LONG, MATE, PAMA, TROM excluded day 004.
WARNING: Data from HERS, MATE, NYAL, VNDP excluded day 005.
WARNING: Data from TROM excluded day 006.

In the following table, UT1R-UTC are the integrated values based on estimated
LODR values in the adjacent column.  See IGS Report No. 1498 (jpl07827.sum)
for details:

JPL ERP TABLE                                GPS week 834 (1995 Dec 31 - Jan 06)
     MJD  XPole  Ypole UT1R-UTC  LODR Xsig Ysig UTsig LODsig Nr Nf Nt  Xrt  Yrt 
            10**-5"      usec    us/d  10**-5"    us   us/d            10**-5"/d
50082.50 -17593  18907  -441300  2133    5    5    12     12 37 12 24 -185  318 
50083.50 -17727  19196  -443371  2009    5    5    11     11 37 12 25 -227  297 
50084.50 -17856  19477  -445403  2055    5    5    11     11 37 10 25 -216  309 
50085.50 -17940  19810  -447424  1986    5    6    11     11 37 11 25 -198  293 
50086.50 -18057  20087  -449401  1969    9    8    11     11 37  6 25 -215  299 
50087.50 -18179  20412  -451355  1938    5    5    11     11 37 12 25 -196  335 
50088.50 -18327  20769  -453291  1934    5    5    11     11 37 11 25 -194  354 
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 834:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE                GPS week 834 (1995 Dec 31 - Jan 06)
      95 12 31   96  1  1   96  1  2   96  1  3   96  1  4   96  1  5   96  1  6
prn   3d rss (m)
  1       0.39       0.49       0.33       0.45       0.47       0.57       0.4 
  2       0.14       0.22       0.21       0.11       0.16       0.13       0.2 
  4       0.15       0.12       0.17       0.20       0.20       0.24       0.3 
  5       0.33       0.26       0.12       0.10       0.10       0.17       0.1 
  6       0.53       0.92       0.24       0.19       0.13       0.10       0.2 
  7       0.15       0.09       0.09       0.22       0.21       0.10       0.1 
  9       0.26       0.16       0.10       0.09       0.23       0.23       0.2 
 12                  0.1        0.15       0.15       0.11       0.27       0.3 
 14       0.11       0.16       0.17       0.15       0.12       0.21       0.2 
 15       0.24       0.30       0.21       0.16       0.35       0.23       0.2 
 16       0.13       0.14       0.17       0.13       0.11       0.15       0.2 
 17       0.31       0.33       0.25       0.12       0.15       0.20       0.1 
 18       0.17       0.22       0.20       0.19       0.15       0.23       0.2 
 19       0.08       0.14       0.05       0.11       0.12       0.08       0.1 
 20       0.31       0.23       0.20       0.20       0.21       0.23       0.1 
 21       0.37       0.36       0.29       0.22       0.30       0.30       0.2 
 22       0.18       0.25       0.28       0.17       0.16       0.17       0.1 
 23       0.54       0.51       0.24       0.10       0.14       0.23       0.3 
 24       0.12       0.15       0.16       0.23       0.26       0.27       0.1 
 25       0.24       0.43       0.16       0.19       0.29       0.33       0.3 
 26       0.28       0.23       0.15       0.18       0.28       0.24       0.1 
 27       0.12       0.10       0.13       0.15       0.18       0.11       0.0 
 28       0.25       0.25       0.18       0.13       0.17       0.13       0.1 
 29       0.18       0.22       0.19       0.22       0.10       0.18       0.1 
 31       0.20       0.15       0.21       0.17       0.20       0.15       0.1 
_______________________
END ORBIT REPEATABILITY TABLE

The following table statistically summarizes this week's "engineering data", as
described in IGS Report No. 1528:

JPL ENGINEERING DATA SUMMARY TABLE           GPS week 834 (1995 Dec 31 - Jan 06)
 receiver/transmitter (dot means point positioned, * means fiducial site)
 |     days analyzed
 |     |      rms clock noise (ns)
 |     |      |           average clock solution (us)
 |     |      |           |           rms pseudorange (cm)
 |     |      |           |           |   (dot means pcode not analyzed)
 |     |      |           |           |           rms phase (mm)
 |     |      |           |           |           |           average arc (hr)
 |     |      |           |           |           |           |
 |___  |__    |_______    |_______    |___        |___        |__
ALBH   4.9    2.58        33.5        36.6        4.05        2.57    
ALGO*  5.7    .681e-01    2.02        38.3        3.17        3.15    
ANKR   2.8    92.7        .516        59.3        3.72        2.61    
AREQ   6.9    83.9        .343        44.2        4.74        2.77    
AUCK   3.0    78.4       -.192        40.0        3.69        2.57    
BOR1   1.0    3.10       -.846        35.0        3.00        2.77    
BRMU    .9    95.6       -.535        40.0        5.00        3.06    
BRUS   2.9    .175        2.99        62.6        4.10        2.82    
CARR   1.0    78.8       -.298e-01    47.0        4.00        2.48    
CAS1    .9    14.0        430.        63.0        5.00        1.46    
CHAT   5.9    95.1        .485        85.5        5.18        2.66    
CRO1   6.9    129.        .342        41.6        5.47        2.27    
FAI2   5.9    11.3        .570        45.2        3.85        2.31    
FAIR*  6.9    .273        .271          .         4.00        2.11    
GODE   2.0    .135        24.4        46.5        4.00        2.75    
GOL2   4.9    .127        .397        43.1        3.82        3.29    
GOLD*  5.7    .102        .328          .         3.07        2.38    
GRAS   1.0    77.9       -.432e-02    33.0        5.00        2.79    
GUAM   6.9    99.9        .339        51.9        7.89        2.41    
HART*  6.9    23.6       -2.57          .         7.45        2.05    
HARV   2.0    .777e+07    .117e+05    75.0        5.00        2.62    
IISC   6.8    784.        .345        66.9        5.00        1.98    
IRKT   6.2    .965e+06   -.198e+04    48.7        4.13        2.78    
KERG   6.9    203.       -479.          .         5.60        2.26    
KIRU   3.0    3.64        12.2        54.0        7.68        2.22    
KIT3   4.7    107.        .596        57.2        4.23        2.81    
KOK2   6.9    .152       -.158e+04    42.0        5.84        2.46    
KOSG*  6.9    3.02        114.          .         3.32        2.12    
KOUR   1.0    4.47       -1.76          .         9.00        1.79    
LPGS   1.2    .816e+05    3.69        56.7        5.00        2.61    
MAC1    .9    .638e+04   -.244e+05    40.0        5.00        1.69    
MADR*  6.3    .118       -.581          .         5.03        2.36    
MAS1   1.7    .239e+05   -8.03        192.        6.00        2.14    
MCM4   3.9    91.6        .245        47.0        5.00        1.46    
MDO1   1.0    1.93       -.690        36.0        4.00        2.81    
METS   4.5    .151       -2.86        34.0        3.00        2.08    
NLIB   5.9    .109       -.600e-01    35.5        3.00        2.82    
NOTO   6.9    314.       -1.67        37.0        4.76        3.07    
ONSA   2.0    .149        .685        38.6        3.00        2.39    
PAMA   3.9    136.        .703        118.        11.1        1.88    
PERT   6.9    2.89       -1.98        68.3        4.63        1.68    
PIE1   5.9    .155       -1.54        35.2        3.85        2.76    
RCM5    .9    .733        .700        48.0        4.00        3.22    
SANT*  6.9    .153        .698          .         5.00        2.67    
SHAO   6.9    89.3        .345        133.        4.03        2.00    
SNI1   1.0    75.3       -.541        56.0        5.00        2.88    
STJO   5.8    3.38        7.55        38.6        4.19        2.85    
THU1   6.9    71.5        .346        46.5        4.46        2.72    
TID2   6.9    .133        1.16        45.0        5.36        2.72    
TIDB*  5.8    .354        1.40          .         5.40        2.42    
TROM*  4.9    5.85        33.2          .         4.42        1.51    
TSKB   1.9    .850e+07    .155e+05    51.6        3.48        2.48    
USUD   3.9    1.70        2.23        35.8        4.58        2.47    
VILL   4.9    309.        .374        58.0        4.63        2.98    
WETT*  5.7    .156        2.48          .         4.97        2.23    
YAR1*  4.9    2.37        .641          .         4.44        1.74    
YELL*  4.8    .134       -.444        43.2        4.00        2.24    
PRN01  6.9    81.6        563.        49.3        4.87        2.51    
PRN02  6.7    81.9       -220.        53.3        4.73        2.44    
PRN04  6.8    80.5        4.76        54.4        5.19        2.15    
PRN05  6.6    82.7        18.0        60.7        4.94        2.58    
PRN06  6.7    81.5        5.11        61.3        4.89        2.13    
PRN07  6.9    78.9        714.        53.2        5.16        2.29    
PRN09  6.9    81.3       -6.43        63.2        5.30        2.05    
PRN12  5.9    .837       -120.        69.5        4.39        2.93    
PRN14  6.9    82.5        12.4        55.2        4.73        2.39    
PRN15  6.8    3.78        258.        56.3        4.88        2.23    
PRN16  6.8    83.6       -160.        57.7        4.74        2.20    
PRN17  6.9    79.4       -102.        56.9        4.73        2.42    
PRN18  6.9    79.3       -5.13        53.1        4.73        2.58    
PRN19  6.9    79.2        279.        47.8        4.44        2.59    
PRN20  6.4    78.7        77.8        58.1        4.74        2.03    
PRN21  6.9    78.6       -11.2        51.3        5.16        2.57    
PRN22  6.5    81.4        275.        50.5        5.03        2.21    
PRN23  6.9    79.9        5.79        52.5        5.16        2.38    
PRN24  6.8    83.6        227.        60.5        5.46        1.97    
PRN25  6.7    82.4        .758e-01    52.5        5.03        2.15    
PRN26  6.9    81.6       -132.        62.2        5.00        2.28    
PRN27  6.9    79.9        14.7        50.6        4.46        2.41    
PRN28  6.9    2.37        57.6        81.3        4.31        2.84    
PRN29  6.9    81.5        5.26        48.4        4.45        2.51    
PRN31  6.9    81.9        197.        50.1        5.00        2.90    
_______________________
END ENGINEERING DATA SUMMARY 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
      95 12 31   96  1  1   96  1  2   96  1  3   96  1  4   96  1  5   96  1  6
prn   3d rss (m)
  1       4.2        6.7        6.3        6.4        6.8        4.5        4.6 
  2       5.7        6.4        6.6        6.2        5.8        7.2        7.6 
  4       4.8        5.5        4.7        3.8        4.1        3.1        3.5 
  5       6.8        6.8        8.4       10.3        8.8       12.0       10.3 
  6       4.5        4.8        6.1        6.3        5.6        5.7        5.8 
  7       4.5        5.7        4.6        4.1        7.0        5.8        4.9 
  9       5.9        6.4        7.2        7.3        6.4        5.8        5.4 
 12                  3.7        2.5        2.9        4.5        4.2       21.2 
 14       4.3        4.5        4.1        4.8        5.0        5.1        5.0 
 15       5.7        5.8        6.0        6.5        6.7        5.5        5.7 
 16       7.3        3.8        4.3        4.3        5.1        5.7        4.4 
 17       7.8        6.7        7.0        5.1        7.2        8.1        5.7 
 18       5.4        5.2        6.7        4.7        3.8        6.2        4.9 
 19      10.8        6.9        7.3        8.4        5.9        6.6        9.2 
 20      11.6        8.0        9.4        9.7        7.9        7.0        6.8 
 21       4.5        5.4        4.3        3.0        4.4        3.9        3.8 
 22       8.1        9.4        9.9        9.4        7.1        7.0        6.9 
 23      23.4       17.0       10.7        9.9       13.0       12.3        7.7 
 24       6.5        6.9        5.6        4.2        3.9        4.0        4.5 
 25       7.7        7.2        7.8        7.2        8.0        8.8        9.3 
 26       6.0        6.5        4.7        5.0        4.9        4.9        5.4 
 27       5.5        5.7        5.7        5.3        4.8        5.0        4.6 
 28       5.5        3.4        2.7        3.6        3.2        3.4        3.5 
 29       3.2        6.0        4.6        3.6        6.4        5.2        5.2 
 31       4.4        3.7        3.3        3.4        4.1        3.3        3.4 
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

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