Subject: [IGSMAIL-44] SIO analysis results
From: Yehuda Bock
Date: 16 JUL 1992 10:11:23

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IGS Electronic Mail       16-JUL-1992 10:11:23       Message Number 44
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                   THIS FILE CONTAINS 2 MESSAGES
==============================================================================

From:    Yehuda Bock
Subject: SIO analysis results
         --------------------

The delay of this submission has been caused by a few factors:
local computer/network problem
leap second increment
earthquake related processing

A) An error in our calender date to MJD routine caused our
   earlier submissions to have MJD's 0.5 days greater than
   they should have been.  This error has now been corrected.

B) The revised analysis described below is based on the analysis
   of the first 29 days of the IGS campaign.

1. Analysis Center: Scripps Institute of Oceanography
2. Solution Identifier: Preliminary Submission 920624
3. Software used: GAMIT/GLOBK
4. Definition of Terrestrial Reference Frame:
     Origin: Nominally ITRF-90
     Orientation: Nominally ITRF-90
     Reference epoch: 1992.51  (MJD 48808.5)
     Relativity Scale: Terrestrial
     Velocity of light: 299792458.0 m/sec
     Permanent tidal correction: None

5. Adjusted parameters:
   (a) Double-difference data
   (b) Single day orbit arcs, 6 ICs and 3 radiation parameters per 
satellite-per-day
   (c) One-per-day-per-station zenith tropospheric parameter,
   (d) Bias parameters, one for each independent double difference 
combination.
   (e) Station positions with +- 10 m constraints at stations other 
than: ALGO, YELL, PIN1, PINB, JPL1, JPLB, SIO1, SIO2, FAIR, KOKR, 
USUD, DS10, DS1B, DS40, DS41, DS60, YAR1, MCMU, TAIW, ONSA, WTZ1, 
METS, MATE, TROM, NALL, KOSG.  For these stations constraints of
+0.001 m for horiziontal and +-0.005 m for the height were used.
   (f) X and Y pole position once per day.  (No estimate is made of UT1-
AT since these deviations are absorbed into the orbital parameters).

6. Station coordinates used.

  DOMES #  Name          X            Y             Z        Epoch    Dur        +- X   +- Y   +- Z    Vx       Vy      Vz
                        (m)          (m)           (m)        MJD      days       (m)    (m)   (m)    (m/yr)  (m/yr)  (m/yr)
X13407S011 DS60 (?)   4849202.502  -360329.180  4114912.961 48808.5    25.0      0.004  0.002  0.004 -0.0101  0.0185  0.0135 
X?????     MASPollom  5439189.142 -1522054.840  2953464.085 48808.5     5.0      0.008  0.004  0.006 -0.0040  0.0185  0.0169 
X40701     SANTogue   1769692.989 -5044573.785 -3468321.402 48808.5    26.0      0.010  0.011  0.007  0.0013 -0.0044  0.0071 
X40104M002 ALGO        918129.628 -4346071.218  4561977.781 48808.5    28.0      0.002  0.003  0.003 -0.0193 -0.0029  0.0012 
X40127M003 YELL      -1224452.371 -2689216.059  5633638.271 48808.5    29.0      0.002  0.002  0.003 -0.0231 -0.0029 -0.0064 
X40407M00? PIN1 PEQ  -2369510.372 -4761207.146  3511396.058 48808.5     7.0      0.003  0.005  0.004 -0.0224  0.0218 -0.0004 
X40407M002 PIN1      -2369510.392 -4761207.164  3511396.033 48808.5    22.0      0.003  0.003  0.004 -0.0224  0.0218 -0.0004 
X40405S0?? DS10 PEQ  -2353614.083 -4641385.355  3676976.402 48808.5     4.0      0.004  0.006  0.005 -0.0159  0.0069 -0.0081 
X40405S026 DS10 (?)  -2353614.078 -4641385.364  3676976.426 48808.5    21.0      0.003  0.004  0.004 -0.0159  0.0069 -0.0081 
X40460M001 SIO1      -2455521.684 -4767213.382  3441654.860 48808.5    12.0      0.003  0.005  0.004 -0.0335  0.0302  0.0180 
X40460     SIO2      -2455539.233 -4767224.071  3441628.818 48808.5    23.0      0.003  0.004  0.004 -0.0335  0.0302  0.0180 
X40400M005 JPL1      -2493304.063 -4655215.510  3565497.280 48808.5    22.0      0.003  0.004  0.004 -0.0372  0.0153  0.0120 
X40400M00? JPL1 PEQ  -2493304.072 -4655215.488  3565497.266 48808.5     7.0      0.003  0.005  0.004 -0.0372  0.0153  0.0120 
X40105S004 DRAO (?)  -2059164.593 -3621108.342  4814432.375 48808.5    29.0      0.002  0.002  0.003 -0.0201 -0.0023 -0.0103 
X40408M001 FAIR      -2281621.313 -1453595.746  5756961.963 48808.5    29.0      0.002  0.002  0.004 -0.0233 -0.0027 -0.0099 
X92201M002 PAMA (?)  -5245195.144 -3080472.123 -1912825.685 48808.5     5.0      0.013  0.012  0.007 -0.0416  0.0527  0.0293 
X40424M004 KOKR      -5543838.047 -2054587.474  2387809.481 48808.5    22.0      0.005  0.003  0.006 -0.0100  0.0613  0.0294 
X?????S??? MCMU (?)  -1310696.417   310469.332 -6213368.516 48808.5    26.0      0.013  0.012  0.007  0.0091 -0.0107 -0.0024 
X50103S    DS42 (?)  -4460996.153  2682557.281 -3674444.134 48808.5    24.0      0.011  0.010  0.008 -0.0363  0.0023  0.0458 
X21729S001 USUD      -3855262.621  3427432.238  3741020.938 48808.5    20.0      0.006  0.004  0.008 -0.0212 -0.0097 -0.0130 
X23902S001 TAIW      -3024781.850  4928936.970  2681234.492 48808.5    27.0      0.007  0.008  0.009 -0.0232 -0.0078 -0.0118 
X50107M004 YAR1      -2389025.457  5043316.885 -3078531.092 48808.5    24.0      0.011  0.010  0.008 -0.0485  0.0107  0.0552 
X30302M001 HART (?)   5084625.136  2670366.576 -2768494.246 48808.5    12.0      0.014  0.012  0.008 -0.0013  0.0241  0.0209 
X10503     METS (?)   2892571.006  1311843.296  5512634.000 48808.5    14.0      0.003  0.002  0.004 -0.0192  0.0132  0.0070 
X10302M003 TROM       2102940.434   721569.354  5958192.082 48808.5    29.0      0.002  0.002  0.004 -0.0186  0.0110  0.0052 
X12734     MATE new   4641949.794  1393045.251  4133287.214 48808.5    26.0      0.004  0.002  0.005 -0.0157  0.0179  0.0117 
X14201     WTZ1 1200  4075578.649   931852.641  4801569.953 48808.5    26.0      0.004  0.002  0.004 -0.0161  0.0165  0.0105 
X10402M004 ONSA       3370658.736   711876.990  5349786.800 48808.5    29.0      0.003  0.001  0.004 -0.0168  0.0147  0.0086 
X10317M001 NALL       1202431.359   252626.760  6237770.778 48808.5    29.0      0.002  0.002  0.004 -0.0178  0.0083  0.0031 
X13504M003 KOSG (?)   3899225.316   396731.763  5015078.257 48808.5    21.0      0.003  0.002  0.004 -0.0150  0.0161  0.0104 

NOTES:
 (a) Those sites without a DOMES point number are at unknown locations,
and those sites with a (?) in the Alternate descriptions possibly have
an incorrect DOMES number.
 (b) The epoch refers to the epoch at which the site position applies
and not the mid-point of the data span.  We have also added the
velocities adopted for these sites at the end of each line.  For most sites
these are the NUVEL-1 velocities with the North American AM0-2 velocity
added.  For PIN1 and DS10, Observed velocities (based on a combined VLBI/
GPS solution using ~10 years of data have been used).
 (c) The PE notation in the site name (PINB, DS1B and JPLB) denotes 
post-Landers earthquake position (applicable after 11:58 UTC June 28, 1992.
 (d) These coordinates were estimated from the first 29 days of IGS data.
They have been rotated and translated into the ITRF 1990 frame by use
of the horizontal coordinates at YELL_GPS, PIN1_GPS, SIO1_GPS, FAIR_GPS, 
USUD_GPS, DS10_GPS, DS60_GPS, YAR1_GPS, ONSA_GPS, WTZ1_GPS, TROM_GPS, 
KOSG_GPS.  The rms difference between the horizontal coordinates of 
these sites and our previous realization (first IERS submission) was
15 mm).

6. Solution 920714

* MIT_TO_IERS: Run on 1992/ 7/14 14:45
* Input file : pmu920714.mit
 48779.5  -0.15531  0.31885 -0.517136  0.00019 0.00020 0.000000 1.93  0.001  0.000  0.000   21  17 0
 48780.5  -0.15624  0.32115 -0.519883  0.00021 0.00021 0.000000 1.84  0.109  0.000  0.000   21  16 0
 48781.5  -0.15368  0.32302 -0.522617  0.00027 0.00025 0.000000 1.32  0.046  0.000  0.000   21  17 0
 48782.5  -0.15451  0.32460 -0.525143  0.00026 0.00023 0.000000 1.32  0.117  0.000  0.000   21  17 0
 48783.5  -0.15472  0.32779 -0.527309  0.00020 0.00020 0.000000 1.80 -0.010  0.000  0.000   21  17 0
 48784.5  -0.15513  0.33001 -0.529055  0.00027 0.00024 0.000000 1.50  0.080  0.000  0.000   22  17 0
 48785.5  -0.15373  0.33206 -0.530225  0.00023 0.00022 0.000000 1.42  0.000  0.000  0.000   22  17 0
 48786.5  -0.15389  0.33508 -0.531264  0.00023 0.00022 0.000000 1.64 -0.023  0.000  0.000   21  17 0
 48787.5  -0.15227  0.33830 -0.532088  0.00037 0.00033 0.000000 1.63 -0.062  0.000  0.000   17  17 0
 48788.5  -0.15213  0.34141 -0.532830  0.00020 0.00022 0.000000 1.59 -0.011  0.000  0.000   21  17 0
 48789.5  -0.15235  0.34447 -0.533614  0.00024 0.00025 0.000000 1.36 -0.040  0.000  0.000   20  17 0
 48790.5  -0.15193  0.34715 -0.534539  0.00025 0.00025 0.000000 1.64 -0.044  0.000  0.000   21  17 0
 48791.5  -0.15280  0.35032 -0.535654  0.00023 0.00024 0.000000 1.79  0.109  0.000  0.000   20  17 0
 48792.5  -0.15191  0.35305 -0.536981  0.00020 0.00019 0.000000 2.22  0.060  0.000  0.000   20  17 0
 48793.5  -0.15268  0.35566 -0.539967  0.00018 0.00019 0.000000 1.54  0.011  0.000  0.000   20  17 0
 48794.5  -0.15108  0.35789 -0.541918  0.00021 0.00021 0.000000 1.35  0.000  0.000  0.000   23  17 0
 48795.5  -0.15072  0.35924 -0.543939  0.00019 0.00020 0.000000 1.81  0.023  0.000  0.000   24  17 0
 48796.5  -0.15012  0.36213 -0.545936  0.00017 0.00018 0.000000 1.50  0.098  0.000  0.000   24  17 0
 48797.5  -0.14935  0.36385 -0.547805  0.00020 0.00023 0.000000 1.87  0.062  0.000  0.000   23  17 0
 48798.5  -0.14714  0.36625 -0.549454  0.00026 0.00025 0.000000 1.36  0.121  0.000  0.000   21  17 0
 48799.5  -0.14706  0.36930 -0.551219  0.00027 0.00028 0.000000 1.25  0.146  0.000  0.000   21  17 0
 48800.5  -0.14466  0.37204 -0.552509  0.00024 0.00024 0.000000 1.30  0.085  0.000  0.000   22  17 0
 48802.5  -0.14321  0.37720 -0.554140  0.00024 0.00027 0.000000 1.25  0.158  0.000  0.000   22  17 0
 48803.5  -0.14155  0.38038 -0.555153  0.00020 0.00025 0.000000 1.89  0.119  0.000  0.000   21  17 0
 48804.5  -0.14115  0.38151  0.443530  0.00016 0.00017 0.000000 2.21  0.129  0.000  0.000   23  17 0
 48805.5  -0.13910  0.38475  0.441782  0.00018 0.00021 0.000000 1.98  0.083  0.000  0.000   22  17 0
 48806.5  -0.13795  0.38644  0.439604  0.00020 0.00023 0.000000 1.58  0.133  0.000  0.000   22  17 0
 48807.5  -0.13692  0.38956  0.437134  0.00021 0.00024 0.000000 1.72  0.096  0.000  0.000   23  16 0
 48808.5  -0.13486  0.39141  0.434606  0.00018 0.00020 0.000000 1.62  0.038  0.000  0.000   24  16 0

NOTES: UT1 not estimated.  Value given is apriori used in analysis.  The rms is the square of chi**2
per degree of freedom in our solution.  It nominally should be 1.0.  st and sv are numbers of stations
and satellites in solution.

==============================================================================

From:     James F. Zumberge
Subject:  JPL analysis results
          --------------------

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 submitted to the JPL BODHI archive, and are
generally available (contact [email-masked] for details regarding
access to bodhi):

filename           contents

jpl06507.erp       Earth rotation results for week beginning 1992 June 21
jpl06517.erp       Earth rotation results for week beginning 1992 June 28
jpl06507.sum       The JPL-contributed portion of IGS Mail Message Number 37
jpl06517.sum       The name of this text file
jpl06517.eph       Precise orbits in the NGS sp1 format for week beginning
                       1992 June 28

These files should also be available shortly from the CDDIS.

Our analysis of GPS week 651 (1992 Jun 28 - Jul 04) follows the strategy de-
scribed in detail in IGS Mail Message 37 (file jpl06507.sum). For that week, 
we have determined that prn12 was unsuitable for use on July 4 (and probably
through July 7, as well). Our precise ephemerides completely ignore data from
prn12 in the solution of the positions of other satellites for that day. 

WARNING: It is recommended that prn 12 not be used for 1992 Jul 04.

Note that our weekly orbit files are each a concatenation of 24-hour orbital 
arcs from each GPS day.  This is currently done because top priority has been
given to quality control, as provided by the "orbit repeatability" table given
below, where independent daily solutions are compared at the day boundaries.
We will extend the length of orbital arcs using stochastic estimation of force
parameters once we are satisfied with quality control procedures.  As an
indication of precision, our independent daily global network solutions show
a few parts per billion RMS for long baselines.

The following table summarizes our daily solutions for polar motion for 17 days
beginning June 21. The weeks of June 21 (GPS week 650) and June 28 (GPS week
651) are contained separately in files jpl06507.erp and jpl06517.erp:

JPL UTPM TABLE                                            (1992 Jun 21 - Jul 08)
  MJD       X        Y       UT1R-UTC XSIG    YSIG   UTSIG  RMS  XYC  XUC  YUC STA SAT PASS    
           ''        ''        sec     ''     ''      sec
 48794.5  -.15231   .35740   .00000  .00025  .00033  .00000  .0  .16  .00  .00  25 17  0
 48795.5  -.15059   .35946   .00000  .00023  .00029  .00000  .0  .23  .00  .00  27 17  0
 48796.5  -.15110   .35929   .00000  .00024  .00029  .00000  .0  .20  .00  .00  27 17  0
 48797.5  -.15060   .36119   .00000  .00032  .00036  .00000  .0  .04  .00  .00  25 17  0
 48798.5  -.14894   .36726   .00000  .00027  .00033  .00000  .0  .22  .00  .00  22 17  0
 48799.5  -.14740   .37000   .00000  .00024  .00029  .00000  .0  .29  .00  .00  24 17  0
 48800.5  -.14558   .37239   .00000  .00023  .00029  .00000  .0  .29  .00  .00  27 17  0
 48801.5  -.14506   .37571   .00000  .00028  .00037  .00000  .0  .22  .00  .00  25 17  0
 48802.5  -.14285   .37905   .00000  .00026  .00032  .00000  .0  .27  .00  .00  25 17  0
 48803.5  -.14171   .38090   .00000  .00022  .00026  .00000  .0  .28  .00  .00  27 17  0
 48804.5  -.14030   .38376   .00000  .00022  .00027  .00000  .0  .30  .00  .00  25 17  0
 48805.5  -.13933   .38622   .00000  .00023  .00028  .00000  .0  .29  .00  .00  26 17  0
 48806.5  -.13850   .38702   .00000  .00024  .00031  .00000  .0  .32  .00  .00  24 17  0
 48807.5  -.13715   .38970   .00000  .00027  .00034  .00000  .0  .30  .00  .00  26 16  0
 48808.5  -.13569   .39171   .00000  .00026  .00031  .00000  .0  .25  .00  .00  26 16  0
 48809.5  -.13406   .39399   .00000  .00023  .00028  .00000  .0  .25  .00  .00  26 16  0
 48810.5  -.13271   .39464   .00000  .00027  .00032  .00000  .0  .32  .00  .00  26 16  0
 48811.5  -.13062   .39847   .00000  .00023  .00027  .00000  .0  .34  .00  .00  26 17  0
END UTPM TABLE

The following table indicates the "orbit repeatability", as defined in IGS Mail
Message 37, for GPS week 651:

JPL ORBIT REPEATABILITY TABLE                GPS week 651 (1992 Jun 28 - Jul 04)
      92  6 28   92  6 29   92  6 30   92  7  1   92  7  2   92  7  3   92  7  4
prn    rms (m)
  2       0.66       0.33       0.8        0.4        1.04       1.12       1.11
  3       0.39       0.81       0.6        0.5        0.51       0.70       0.70
 11       0.53       0.63       0.3        0.4        0.38       1.15       0.82
 12       0.99       0.83       0.6        1.2        0.71       7.03       6.78
 13       0.77       0.67       0.8        0.6        0.49       0.39       0.77
 14       0.49       0.73       0.6        0.9        0.45       1.00       1.09
 15       1.09       1.18       1.1        1.1        0.55       0.95       0.98
 16       0.32       0.37       0.2        0.3        0.57       0.49       0.32
 17       0.66       0.67       0.5        1.0        0.74       1.17       1.08
 18       0.41       0.40       0.4        0.4        0.38       0.54       0.61
 19       0.97       0.67       0.6        1.0        0.84       0.69       0.58
 20       0.91       0.21       0.4        0.5        0.66       0.67       0.81
 21       0.64       0.49       0.4        0.7        0.61       0.56       0.79
 23       0.43       0.28       0.3        0.4        0.73       0.99       0.85
 24       0.70       0.65       0.7        0.8        0.76       0.94       1.05
 25       0.92       0.77       1.0        0.8        0.57       0.39       0.59
 28       1.55       1.40       1.2        0.9        1.18       2.21       2.00
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
      92  6 28   92  6 29   92  6 30   92  7  1   92  7  2   92  7  3   92  7  4
prn    rms (m)
  2       4.7        6.0        4.4        5.3        7.1        5.4        5.1 
  3      12.6       12.7       12.5       15.5       11.9       14.6       11.4 
 11       4.5        6.3        6.9        5.9        7.4        6.5        6.5 
 12       7.8       13.5       21.1        4.8        9.5        7.5       15.1 
 13       6.8        8.0       10.7        8.4        5.4        6.8        5.2 
 14       5.7        4.3        5.0        4.6        4.8        5.6        5.5 
 15       6.0        6.8        6.6        5.3        7.8        4.8        6.3 
 16       4.7        6.6        6.3        6.9        6.1        7.2        4.8 
 17       8.7       11.4        6.4        6.4        6.1        5.3        7.0 
 18       7.6        8.3        7.4        8.9        7.1        6.6        7.9 
 19       9.7        7.5        9.2        7.3        5.8        5.4        5.9 
 20       4.8        4.2        3.5        3.1        3.6        3.8        6.2 
 21       4.1        4.4        4.2        3.9        4.0        4.3        4.2 
 23       3.9        5.0        3.9        4.1        5.0        3.8        6.1 
 24      15.4       16.5       17.0       12.9       12.8       10.6        9.4 
 25      15.8        6.2        7.7        7.6        7.1        5.1        5.1 
 28       4.1        6.8        4.7        5.5        4.7        4.0        5.5 
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES