Subject: [IGSREPORT-7074] Wk 1055 JPL Analysis Report
From: David C Jefferson <[email-masked]>
To: [email-masked], [email-masked]
Date: Tue, 11 Apr 2000 16:02:13 -0700 (PDT)

******************************************************************************
IGS Electronic Report   11 Apr 16:02:44 PDT 2000      Message Number 7074
******************************************************************************

Author: D C Jefferson

******************************************************************************
JPL ANALYSIS REPORT   GPS-WEEK 1055 (DAYS 86-92, DATES 2000 Mar 26 - Apr 01)
******************************************************************************

Submitted by the JPL IGS/FLINN Analysis Team:

D C Jefferson, Y E Bar-Sever, M B Heflin, F H Webb, J F Zumberge

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 (137.78.60.30),
directory pub/jpligsac/1055.  These files (except for *.tro) have also
been sent to the CDDIS.

______________________________________________________________________________
filename             contents
______________________________________________________________________________
jpl10557.sum         This text file.
jpl10557.erp         Earth rotation parameters for GPS week 1055.
jpl10557.snx         Ground station coordinates for GPS week 1055, SINEX format.
jpl1055[0-6].sp3     GPS ephemerides for GPS week 1055, sp3 format.
jpl1055[0-6].tro     Ground station troposphere estimates for GPS week 1055.
jpl1055[0-6].clk     GPS and ground station clocks for GPS week 1055, RINEX.
______________________________________________________________________________

Median Orbit Repeatability (see table below): 11.0 cm

STRATEGY UPDATE
---------------
We continue to exclude data from IGS stations that do not employ Dorne-Margolin
style antennae (see IGS Report No. 6260).

This week, we incorporate pseudorange bias corrections for cross-correlating
receivers in the global network (typically, TurboRogues and Trimble 4000s).
For these receiver types, CA and "P2" measurements are converted to true P1
and P2 values by applying point-by-point, satellite-dependent pseudorange
corrections as outlined in IGS Mail Message No. 2744.  For details on the
necessity of this operation stemming from processing a network of mixed
receiver types, please see IGS Mail Message No. 2320.

GENERAL
-------
This week, we add two new candidate global stations.  As with other sites,
these sites are given the opportunity to participate in the orbit and clock
solution as the global site distribution varies.  The following nominal
coordinates were assumed:
                                  X (m)          Y (m)          Z (m)
ISTA (Istanbul, Turkey)      4208830.5007   2334850.2372   4171267.2704
TRAB (Trabzon, Turkey)       3705250.5866   3084421.6821   4162044.7791

A large clock discontinuity (reset) of about 1 microsecond was detected
for PRN16 at approximately 15:50 on day 088.  Additionally, it appears that
the drift of the clock onboard this satellite simultaneously experienced a
shift from about +47 ps/s to -63 ps/s.  Also, the drift of this satellite's
clock shifted from about -74 ps/s to +57 ps/s on day 090.

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: ALGO (not USNO) used as reference clock day 086.
WARNING: FAIR (not USNO) used as reference clock days 087-089.
WARNING: DRAO (not USNO) used as reference clock days 090-092.
WARNING: Data from PRN15 and PRN18 excluded the entire GPS week 1055.
WARNING: Data from PRN14, PRN29 excluded day 086.
WARNING: Data from PRN02, PRN13, PRN14 excluded day 087.
WARNING: Data from PRN14 excluded day 088.
WARNING: Data from PRN10, PRN14, PRN30 excluded day 089.
WARNING: Data from PRN14, PRN17, PRN26 excluded day 090.
WARNING: Data from PRN19 excluded day 091.
WARNING: Data from PRN06, PRN07 excluded day 092.
WARNING: Data from AZU1, CHWK, DUBO, FLIN, GLSV, GOL2, KUNM, LHAS, MAD2, NANO,         QUIN, RIOP, TID2, UCLU, WHIT, WSLR excluded day 086.
WARNING: Data from AZU1, CHWK, DUBO, FLIN, GLSV, GOL2, IISC, KUNM, LHAS, MAD2,         NANO, NYA1, QUIN, TID2, UCLU, WHIT, WSLR, WSRT excluded day 087.
WARNING: Data from CHWK, CORD, DUBO, FLIN, GLSV, GOL2, GRAZ, HERS, KUNM, LHAS,         MAD2, NANO, QUIN, TID2, UCLU, USNO, WHIT, WSLR excluded day 088.
WARNING: Data from CIT1, DUBO, FLIN, GOL2, KUNM, LHAS, MAD2, NANO, QUIN, RIOP,         TID2, UCLU, WHIT excluded day 089.
WARNING: Data from CIT1, DUBO, FLIN, GOL2, KUNM, MAD2, NANO, TID2, UCLU, WES2,         WHIT excluded day 090.
WARNING: Data from CIT1, DARW, DUBO, FLIN, GOL2, IISC, KUNM, LHAS, MAD2, MATE,         NANO, RAMO, TID2, UCLU, WHIT excluded day 091.
WARNING: Data from ALIC, BJFS, COCO, DAEJ, DARW, DAV1, DUBO, FLIN, GOL2, HOB2,         IISC, JAB1, KARR, KUNM, MAD2, MAW1, MCM4, NANO, NTUS, OHIG, PERT, RAMO,         STR1, SUWN, TID2, TORP, TOW2, UCLU, URUM, WHIT, WTZT, YAKZ, YAR2, YSSK          excluded day 092.

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 1055 (2000 Mar 26 - Apr 01)
version 2           
     MJD   XPole   Ypole  UT1R-UTC   LODR Xsg Ysg UTsg LOsg Nr Nf Nt   Xrt   Yrt
         10**-6" 10**-6"      .1us .1us/d 10**-6" .1us .1us/d          10**-6"/d
51629.50   73218  349303   2616172   8516  42  48  149  149 42  0 24  -276  -622
51630.50   72962  348496   2607817   8194  42  49  215  215 42  0 23  -186   715
51631.50   72542  347736   2599103   9234  39  44  146  146 42  0 25  -361  -458
51632.50   72911  347008   2590114   8744  42  48  172  172 42  0 23   527  -603
51633.50   73905  346187   2581436   8611  44  53  158  158 42  0 23   950  -354
51634.50   74874  346042   2573263   7736  42  46  152  152 42  0 25  1501   113
51635.50   75482  346134   2565290   8209  50  55  158  158 42  0 23   899  -529
END ERP TABLE

The following table indicates the "3-dimensional orbit repeatability", as 
defined in IGS Mail Message 37, for GPS week 1055:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]

JPL ORBIT REPEATABILITY TABLE               GPS week 1055 (2000 Mar 26 - Apr 01)
      00  3 26   00  3 27   00  3 28   00  3 29   00  3 30   00  3 31   00  4  1
prn   3d rss (cm)
  1      17         11          8         10         14         13         12   
  2       7                    12          6          7         14         12   
  3      12         16         11         11         10          8         20   
  4      17         20         12         11          7         10          9   
  5      22         14         13          8          8          8         10   
  6      10          9         11         10         11         10              
  7      31         14         17         18         11          9              
  8      11          8         19         15          8          8          9   
  9      13         10         10         12         12         10         19   
 10      34         33          5                     4          9         10   
 11      22          9         14         15         13         17         14   
 13      11                    10         12          7          7          7   
 16      15         11          7         12         23         17         30   
 17       8         10         25         22                     9         16   
 19       7         10         13         10          6                     9   
 21       7          6         19         18         18         17         16   
 22       9         10          9         14         10          6          8   
 23      16         13         18         20         23         22         15   
 24      44         33         13          8          6         10         10   
 25      21         12         11         13         14         10         12   
 26      20          9         16          6                    11         11   
 27      12          9         17         14          9          7          9   
 29                 16         13         31         42         26         13   
 30      16          9          8                    13         10         18   
 31      10         10         13          8          7          8         15   
_______________________
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 1055 (2000 Mar 26 - Apr 01)
 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)
 |     |      |           |           |           |           |
 |___  |__    |_______    |_______    |___        |___        |__
ALGO*  7.0    .246       -2.65        44.7        4.17        2.44    
AMC2   1.0    .332e-01    .322e-01    40.0        6.00        3.29    
AOML   2.0    126.       -.242e-01    84.6        6.33        2.96    
AREQ*  7.0    18.6        77.1        27.6        5.46        2.65    
ARTU   7.0    108.       -.111        26.0        4.87        2.39    
ASC1   6.6    70.9       -.135e-01    88.2        6.61        2.02    
BAHR   7.0    .817e+05    455.        36.2        4.61        2.78    
BJFS   3.0    1.16        604.        20.3        4.36        2.79    
BRMU*  2.0    137.       -.152e-01    77.4        7.54        3.23    
CAS1*   .9    65.8       -.187e-01    32.0        4.00        .600    
CHAT*  5.0    124.       -.107e-01    88.6        5.00        2.92    
CIC1   4.9    152.       -.503e-01    76.6        4.22        2.33    
COCO   2.0    69.3       -.115e-01    28.4        7.06        3.78    
CRO1   4.0    .232       -.206        57.7        6.25        2.26    
DAEJ   1.0    1.55        682.        66.0        5.00        2.53    
DARW    .8    76.8       -.278e-01    32.0        8.00        2.74    
DAV1*  5.8    63.4       -.119e-01    72.2        4.00        1.06    
DGAR   6.5    66.7       -.144e-01    34.7        6.19        2.46    
DRAO   2.9    .           .           45.4        5.00        2.82    
EISL   3.8    170.       -.854e-01    90.0        5.71        2.44    
FAIR*  7.1    .718        .684e-01    32.2        6.13        1.82    
FORT*  5.0    2.11       -1.62          .         7.14        1.69    
GALA   7.0    97.8       -.142        31.6        6.74        3.13    
GODE    .9    .711e-01    .191        40.0        7.00        3.16    
HARK*  6.7    14.0        330.        68.7        5.61        2.49    
HOB2*  5.0    .961e-01   -12.4        51.9        6.04        3.31    
HRAO   2.0    .977e-01    .154        92.1        4.00        2.71    
IRKT*  6.9    .129       -.197        85.7        6.00        2.98    
JAB1   4.9    102.       -.162        64.0        6.21        2.79    
JAMA   3.0    123.       -.110        55.4        6.00        3.56    
KELY   2.0    136.       -.316e-02    92.5        5.00        1.39    
KERG*  7.0    1.87        16.8        53.4        6.29        2.61    
KIT3*  1.8    131.       -.386e-02    48.5        5.00        3.24    
KOKB*  7.0    .431       -.571        59.4        7.15        2.90    
KOUR*  5.9    98.3       -.119        44.0        7.61        2.40    
MAC1*  5.5    95.6       -.135        34.3        4.67        2.28    
MAG0   4.0    .760e+04   -.507e-01    27.3        5.00        2.23    
MALI   1.3    48.5       -225.          .         8.53        1.35    
MAS1*  3.0    2.54        1.01        28.3        5.35        3.50    
MDO1*   .8    13.3       -14.2        71.0        4.00        2.32    
NOTO   2.0    .811e-01    96.9        72.0        5.52        3.24    
NOUM   7.0    .289e+06    501.        85.3        5.90        2.06    
NRC1   1.0    .274       -.165e-02    44.0        4.00        1.99    
NRC2   1.0    .134       -.251        41.0        3.00        1.63    
NTUS   4.5    539.       -.176e-01    67.9        7.43        1.54    
NYA1   3.0    .111        .872e-01    30.1        4.38        1.27    
NYAL   5.0    .133       -.531        45.8        4.80        1.20    
OHIG*  6.0    90.7       -.994e-02    52.0        5.36        2.55    
ONSA*  4.7    33.4       -.622e-01    42.6        4.22        2.46    
PETP   3.0    127.       -.115        35.4        5.00        2.47    
POL2   1.0    149.       -.534e-01    92.0        5.00        2.37    
REYK   5.0    106.       -.936e-02    79.5        6.06        1.61    
RIOG    .9    111.       -.109        20.0        4.00        2.52    
SANT*  6.9    90.0       -.200        35.8        7.16        2.13    
SELE   3.8    .291e+04   -.126        81.7        3.91        2.56    
SFER   4.0    .530        91.3        83.0        5.06        2.61    
STJO   5.0    3.20        .451        39.2        4.81        2.62    
STR1   1.0    1.03       -4.41        25.0        6.00        3.88    
THTI   7.0    .289e+06    497.        77.0        7.73        2.62    
THU1*  1.0    79.3       -.435e-02    61.0        6.00        1.30    
TIXI   3.9    108.       -.110        27.0        4.79        1.67    
TOW2   2.0    71.1       -.128e-01    20.0        5.00        3.73    
TRAB   3.8    38.5        .197e-01    49.8        5.00        2.14    
TSKB*  6.1    1.69        .187        62.7        3.81        2.82    
USNO   1.0    .127        2.34        42.0        6.00        3.63    
WSRT   1.0    .548e-01   -.843e-02    29.0        4.00        2.55    
WTZR*  7.0    81.6        .679        52.4        5.93        3.02    
WUHN   1.9    162.       -.768e-01    70.5        4.00        2.40    
YAR1*  6.9    .112e+04   -1.16        73.8        3.76        2.25    
YELL*  7.0    .134        .100        39.4        3.88        1.67    
ZECK   2.0    120.       -.577e-02    83.5        4.00        2.26    
PRN01  7.0    78.4        122.        54.7        5.16        2.36    
PRN02  6.0    79.3       -195.        56.6        5.84        2.22    
PRN03  7.0    82.0        98.9        55.5        5.16        2.30    
PRN04  6.6    82.5        767.        59.7        5.73        1.93    
PRN05  7.0    81.0        245.        56.6        5.74        2.40    
PRN06  6.0    78.9        1.60        54.5        5.68        2.35    
PRN07  6.0    80.1        88.3        56.8        5.69        2.21    
PRN08  6.8    82.0        706.        52.5        5.30        2.21    
PRN09  6.8    81.4       -37.9        54.4        5.59        2.34    
PRN10  6.0    81.1        48.8        57.0        5.52        2.28    
PRN11  6.9    81.9        245.        54.3        5.87        2.21    
PRN13  6.0    78.9       -651.        59.9        5.51        2.19    
PRN14  1.0    80.7        9.89        73.0        7.00        2.30    
PRN16  6.8    478.        55.3        62.4        5.29        1.89    
PRN17  5.8    82.9       -249.        58.1        6.04        2.15    
PRN19  5.9    80.5        134.        53.2        5.17        2.38    
PRN21  7.0    81.0        5.53        56.7        5.30        2.56    
PRN22  7.0    80.4        369.        58.3        5.45        2.43    
PRN23  7.0    82.5        8.41        58.8        6.30        2.44    
PRN24  6.6    82.6        681.        57.2        6.02        2.16    
PRN25  7.0    82.1        5.00        55.1        5.73        2.34    
PRN26  6.0    78.4        318.        52.8        6.18        2.24    
PRN27  6.9    78.7        14.5        53.3        5.00        2.12    
PRN29  6.0    81.6        522.        56.6        5.68        2.39    
PRN30  6.0    81.3       -15.0        60.4        6.03        2.16    
PRN31  7.0    81.5        40.9        55.1        5.15        2.38    
_______________________
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
      00  3 26   00  3 27   00  3 28   00  3 29   00  3 30   00  3 31   00  4  1
prn   3d rss (cm)
  1     525        414        450        390        541        611        505   
  2     680                   344        531        526        293        763   
  3     440        281        269        311        312        329        613   
  4     341        463        699        450        611        444        489   
  5     371        367        518        490        474        527        493   
  6     530        391        400        515        633        443              
  7     313        320        342        360        512        396              
  8     237        287        357        342        407        332        286   
  9     586        370        343        266        365        416        299   
 10     527        593        689                   698        643        653   
 11     197        169        256        271        456       1102        176   
 13     224                   358        251        269        332        684   
 14                                                           3223              
 16     771        744        574        402        684        540        576   
 17     341        316        362        460                   368        361   
 19     278        394        486        476        387                  1282   
 21     531        270        332        234        326        375        324   
 22     410        466        450        365        495        506        341   
 23     703        811        578        330        445        358       1131   
 24     550        342        374        665        508        351        396   
 25     351        354        474        478        619        553        688   
 26     285        290        333        325                   449        429   
 27     733        946        795        787       1234        686        822   
 29                432        632        656        527        470        524   
 30     486        306        294                   328        563        344   
 31     454        419        532        280        440        264        467   
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES

global:   algo amc2 aoml areq artu asc1 bahr bjfs brmu cas1 chat cic1 coco cro1 daej darw dav1 dgar drao eisl fair fort gala gode hark hob2 hrao irkt jab1 jama kely kerg kit3 kokb kour mac1 mag0 mali mas1 mdo1 noto noum nrc1 nrc2 ntus nya1 nyal ohig onsa petp pol2 reyk riog sant sele sfer stjo str1 thti thu1 tixi tow2 trab tskb usno wsrt wtzr wuhn yar1 yell zeck