Subject: [IGSMAIL-0421] ITRF92 coordinates
From: Z. Altamimi and C. Boucher
Date: Wed, 22 Dec 1993 9:55:28 PST

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IGS Electronic Mail      Wed Dec 22  9:55:28 PST 1993      Message Number 0421
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Author: Z. Altamimi and C. Boucher
Subject: ITRF92 coordinates

Subject: ITRF92 coordinates

Dear colleagues,

It was agreed with the Analysis Center Coordinator to compile the ITRF92
coordinates of the 13 stations to be fixed or constrained tightly by the 
Analysis Centers. In order to do that we first performed some verifications
and consistency tests between the ITRF91 and ITRF92 coordinate and velocity 
sets. As result of these tests, we have to point out the following remarks:

1. The ITRF92 station coordinates have been adjusted by combination of VLBI,
   LLR, SLR and GPS solutions at epoch 1988.0. The GPS solutions included in 
   this adjustment were derived from IGS'92 observations. While all the
   VLBI, LLR and SLR station coordinates have been provided by the 
   corresponding analysis centers at epoch 1988.0, the GPS station 
   coordinates have been provided by IGS analysis centers at the central
   epoch of observations (1992.6). These GPS stations coordinates were
   mapped at epoch 1988.0 using the ITRF91 velocity field.

2. It appears that SOME of the ITRF91 sites have their VERTICAL velocities 
   probably too large to represent real geodetic motion. As far as the IGS 
   is concerned, only two GPS sites are in this case. These two sites are
   PENTICTON and ZIMMERWALD with vertical velocities 24.3 and 8.1 mm/y 
   respectively. Meanwhile the ITRF92 vertical velocities for these two 
   sites are more "realistic" ; 0.7 and -2.1 mm/y respectively.

3. Concerning the VLBI and SLR sites (which are not GPS sites) whose 
   ITRF92 velocities are "largely" different from ITRF91, they did not
   disturb the ITRF92 coordinate combination. This is due to the fact that
   station coordinates were originally provided by the VLBI and SLR analysis 
   centers at epoch 1988.0. 

4. The ITRF92 site velocities seem to be more realistic wrt ITRF91 with the
   exception of YELLOWKNIFE whose VERTICAL velocity is probably too large;
   19.4 mm/y which is certainly due to a poor VLBI estimate.

5. The ITRF92 coordinates at epoch 1988.0 of PENTICTON and ZIMMERWALD were 
   corrected by the difference of their velocities between ITRF91 and ITRF92
   (over 4.6 years = 1992.6 - 1988.0). 

6. Concerning YELLOWKNIFE, we recommend to use the NNR-NUVEL1 velocity 
   instead of ITRF92 one.

7. The file ITRF92.SSC was updated by the 3 above corrections (position of 
   PENTICTON and ZIMMERWALD and velocity of YELLOWKNIFE). This file can be 
   downloaded by ftp from
   
   URANUS.IGN.FR (192.33.147.79)

   login:    ITRF
   password: IERSPUB
   file:     ITRF92.SSC

8. The velocity differences for PENTICTON and YELLOWKNIFE explain the 
   large discrepancies between the previous ITRF92 coordinates and GPS
   estimates pointed out by J. Kouba in his message #417. This should
   be also the case for ZIMMERWALD.

Please find below the ITRF92 coordinates AT EPOCH 1994.0 of the 13 stations
to be fixed or constrained tightly by the Analysis Centers. We also provide
the ITRF92 coordinates (also at epoch 1994.0) for the other remaining 
stations.

The antenna heights as well as the local ties between SLR/VLBI and GPS 
markers were updated recently by W. Gurtner and Z. Altamimi. The file
containing these values can be downloaded by ftp from IGS Central Bureau:

   sideshow.jpl.nasa.gov (128.149.70.41)
   login:  anonymous
   file:   /igscb/station/tie/localtie.tab

SSC(IERS) 93 C 04 (ITRF92, EPOCH 1994.0) 

THE 13 STATIONS
===============

DOMES     SITE         FILE CDP        X            Y            Z       SX    SY    SZ    VX     VY     VZ    SVX   SVY   SVZ
NUMBER    NAME         NAME NUM.       m            m            m       m     m     m     ---------------- m/y --------------   *
--------- ----------------- ---- ------------ ------------ ------------ ----- ----- ----- ------ ------ ------ ----- ----- ----- --
10302M003 TROMSO       TROM       2102940.399   721569.407  5958192.082 0.006 0.006 0.006 -0.019  0.020  0.005 0.002 0.001 0.001 NC
13407S012 MADRID       MADR       4849202.502  -360329.172  4114913.062 0.006 0.005 0.006 -0.007  0.020  0.015 0.001 0.001 0.001 NC
13504M003 KOOTWIJK     KOSG       3899225.303   396731.771  5015078.296 0.007 0.006 0.006 -0.014  0.017  0.007 0.004 0.003 0.004 NC
14201M009 WETTZELL     WETT       4075578.644   931852.630  4801570.015 0.005 0.005 0.006 -0.017  0.016  0.009 0.001 0.001 0.001 NC
30302M002 HARTEBEESTHO HART       5084625.437  2670366.570 -2768494.014 0.011 0.010 0.008 -0.003  0.019  0.015 0.002 0.002 0.002 NC
40104M002 ALGONQUIN    ALGO        918129.578 -4346071.246  4561977.828 0.005 0.005 0.005 -0.015 -0.006  0.004 0.001 0.001 0.001 NC
40127M003 YELLOWKNIFE  YELL      -1224452.415 -2689216.088  5633638.270 0.006 0.006 0.006 -0.022 -0.001 -0.005 0.003 0.003 0.003 N 
40405S031 GOLDSTONE_PEQGOLD      -2353614.103 -4641385.429  3676976.476 0.008 0.008 0.008 -0.014  0.004 -0.006 0.001 0.001 0.001 NC
40408M001 FAIRBANKS    FAIR      -2281621.346 -1453595.783  5756961.940 0.005 0.006 0.006 -0.021 -0.004 -0.010 0.001 0.001 0.001 NC
40424M004 KOKEE_PARK   KOKB      -5543838.077 -2054587.442  2387809.612 0.006 0.006 0.007 -0.008  0.063  0.031 0.001 0.001 0.001 NC
41705M003 SANTIAGO     SANT       1769693.238 -5044574.084 -3468321.125 0.009 0.010 0.008  0.001 -0.005  0.008 0.003 0.003 0.003 N 
50103M108 TIDBINBILLA  TIDB      -4460996.069  2682557.144 -3674443.875 0.010 0.011 0.011 -0.039  0.004  0.042 0.002 0.002 0.002 NC
50107M004 YARRAGADEE   YAR1      -2389025.394  5043316.852 -3078530.861 0.009 0.008 0.009 -0.045  0.008  0.053 0.002 0.002 0.002 NC
----------------------------------------------------------------------------------------------------------------------------------
*  N : NNR-NUVEL1 velocity
  CN : ITRF92 velocity field (combined solution from SLR and VLBI estimates)

Remark: The above 13 station coordinates refer to the GPS MONUMENTS with 
        the exception of MADRID and GOLDSTONE_PEQ whose coordinates refer
        to the botom of the antennas (ARP). 
        The coordinates of TIDBINBILLA (named previously CANBERRA)
        were originally referred to the ARP. Here they are reduced to the
        GPS monument using the antenna height given in the file localtie.tab. 

THE OTHER STATIONS
==================

DOMES     SITE         FILE CDP        X            Y            Z       SX    SY    SZ    VX     VY     VZ    SVX   SVY   SVZ
NUMBER    NAME         NAME NUM.       m            m            m       m     m     m     ---------------- m/y --------------
--------- ----------------- ---- ------------ ------------ ------------ ----- ----- ----- ------ ------ ------ ----- ----- ----- --
10302M002 TROMSO            7602  2102904.113   721602.523  5958201.296 0.006 0.006 0.006 -0.019  0.020  0.005 0.002 0.001 0.001 NC
10317M001 NY-ALESUND   NYAL       1202430.707   252626.639  6237767.498 0.007 0.007 0.007 -0.016  0.010  0.003 0.003 0.003 0.003 N 
10325M001 HONEFOSS     HONE       3132538.975   566401.742  5508609.877 0.018 0.018 0.018 -0.016  0.016  0.007 0.003 0.003 0.003 N 
10402M004 ONSALA       ONSA       3370658.728   711876.983  5349786.858 0.006 0.006 0.006 -0.014  0.014  0.012 0.001 0.001 0.001 NC
10402S002 ONSALA            7213  3370606.096   711917.447  5349830.720 0.005 0.005 0.006 -0.014  0.014  0.012 0.001 0.001 0.001 NC
10503M002 METSAHOVI         7601  2890652.792  1310295.303  5513958.637 0.007 0.006 0.007 -0.018  0.015  0.006 0.003 0.003 0.003 N 
10503S011 METSAHOVI    METS       2892570.980  1311843.303  5512634.008 0.007 0.006 0.007 -0.018  0.015  0.006 0.003 0.003 0.003 N 
11001M002 GRAZ         GRAZ       4194424.008  1162702.510  4647245.275 0.006 0.006 0.006 -0.019  0.018  0.009 0.002 0.001 0.002 NC
11001S002 GRAZ              7839  4194426.568  1162693.993  4647246.597 0.006 0.006 0.006 -0.019  0.018  0.009 0.002 0.001 0.002 NC
12734M008 MATERA       MATE       4641949.760  1393045.214  4133287.262 0.006 0.006 0.006 -0.022  0.017  0.012 0.001 0.001 0.001 NC
12734S001 MATERA            7939  4641964.933  1393070.039  4133262.301 0.006 0.006 0.006 -0.022  0.017  0.012 0.001 0.001 0.001 NC
13212M007 HERSTMONCEUX HERS       4033470.259    23672.715  4924301.172 0.006 0.006 0.006 -0.014  0.017  0.010 0.001 0.001 0.001 NC
13212S001 HERSTMONCEUX      7840  4033463.753    23662.436  4924305.116 0.006 0.006 0.006 -0.014  0.017  0.010 0.001 0.001 0.001 NC
13407S010 MADRID            1565  4849336.744  -360488.836  4114748.788 0.005 0.005 0.006 -0.007  0.020  0.015 0.001 0.001 0.001 NC
13407S012 MADRID       MADR       4849202.502  -360329.172  4114913.062 0.006 0.005 0.006 -0.007  0.020  0.015 0.001 0.001 0.001 NC
13504M002 KOOTWIJK          8833  3899237.764   396769.275  5015055.272 0.007 0.006 0.006 -0.014  0.017  0.007 0.004 0.003 0.004 NC
13504M003 KOOTWIJK     KOSG       3899225.303   396731.771  5015078.296 0.007 0.006 0.006 -0.014  0.017  0.007 0.004 0.003 0.004 NC
14001S001 ZIMMERWALD        7810  4331283.564   567549.678  4633140.045 0.007 0.007 0.007 -0.016  0.020  0.010 0.002 0.002 0.002 NC
14201S004 WETTZELL          7224  4075539.947   931735.217  4801629.335 0.005 0.005 0.006 -0.017  0.016  0.009 0.001 0.001 0.001 NC
14201M009 WETTZELL     WETT       4075578.644   931852.630  4801570.015 0.005 0.005 0.006 -0.017  0.016  0.009 0.001 0.001 0.001 NC
21729S001 USUDA             7246 -3855355.445  3427427.573  3740971.292 0.026 0.026 0.029 -0.021 -0.009 -0.013 0.003 0.003 0.003 N 
21729S003 USUDA ORIGIN USUD      -3855262.664  3427432.160  3741020.949 0.012 0.012 0.013 -0.021 -0.009 -0.013 0.003 0.003 0.003 N 
21729S005 USUDA DISPLA USUD      -3855263.094  3427432.549  3741020.461 0.013 0.014 0.013 -0.021 -0.009 -0.013 0.003 0.003 0.003 N 
21729S007 USUDA CURREN USUD      -3855263.067  3427432.513  3741020.432 0.013 0.013 0.013 -0.021 -0.009 -0.013 0.003 0.003 0.003 N 
23601M001 TAIPEI       TAIW      -3024781.912  4928936.884  2681234.512 0.014 0.013 0.014 -0.023 -0.007 -0.013 0.003 0.003 0.003 N 
30302S001 HARTEBEESTHO      7232  5085442.769  2668263.442 -2768697.097 0.010 0.010 0.008 -0.003  0.019  0.015 0.002 0.002 0.002 NC
31303M001 MASPALOMAS   MASP       5439189.188 -1522054.840  2953464.216 0.008 0.009 0.007 -0.003  0.019  0.016 0.003 0.003 0.003 N 
40101M001 ST. JOHNS    STJO       2612631.303 -3426807.011  4686757.751 0.008 0.006 0.006 -0.018 -0.002  0.009 0.003 0.003 0.003 N 
40104S001 ALGONQUIN         7282   918034.820 -4346132.266  4561971.163 0.004 0.005 0.005 -0.015 -0.006  0.004 0.001 0.001 0.001 NC
40105M001 PENTICTON         7283 -2058840.398 -3621286.389  4814420.688 0.007 0.007 0.007 -0.015 -0.003 -0.008 0.001 0.001 0.001 NC
40105M002 PENTICTON    DRAO      -2059164.616 -3621108.398  4814432.403 0.006 0.007 0.006 -0.015 -0.003 -0.008 0.001 0.001 0.001 NC
40127M001 YELLOWKNIFE       7285 -1224124.567 -2689530.685  5633555.387 0.006 0.007 0.007 -0.022 -0.001 -0.005 0.003 0.003 0.003 N 
40129M001 VICTORIA          7289 -2341310.122 -3539083.874  4745768.331 0.018 0.028 0.033 -0.018 -0.001 -0.010 0.003 0.003 0.003 N 
40129M002 VICTORIA     PGC1      -2327188.087 -3522529.006  4764832.368 0.012 0.015 0.010 -0.018 -0.001 -0.010 0.003 0.003 0.003 N 
40129M003 ALBERT_HEAD  ALBH      -2341332.848 -3539049.507  4745791.379 0.008 0.011 0.008 -0.018 -0.001 -0.010 0.003 0.003 0.003 N 
40400M003 JPL_MESA          7263 -2493306.094 -4655197.476  3565519.404 0.008 0.009 0.008 -0.031  0.020  0.007 0.001 0.001 0.001 NC
40400M006 JPL_MESA     JPLM      -2493304.107 -4655215.538  3565497.352 0.008 0.009 0.008 -0.031  0.020  0.007 0.001 0.001 0.001 NC
40400M007 JPL_MESA_PEQ JPLM      -2493304.114 -4655215.526  3565497.367 0.012 0.012 0.009 -0.031  0.020  0.007 0.001 0.001 0.001 NC
40403M001 PALOS VERDES      7268 -2525452.890 -4670035.539  3522886.859 0.011 0.016 0.014 -0.030  0.024  0.013 0.002 0.001 0.002 NC
40405M013 GOLDSTONE         7288 -2356494.107 -4646607.672  3668426.620 0.006 0.008 0.007 -0.014  0.004 -0.006 0.001 0.001 0.001 NC
40405S028 GOLDSTONE    GOLD      -2353614.094 -4641385.414  3676976.478 0.009 0.010 0.009 -0.014  0.004 -0.006 0.001 0.001 0.001 NC
40405S031 GOLDSTONE_PE GOLD      -2353614.103 -4641385.429  3676976.476 0.008 0.008 0.008 -0.014  0.004 -0.006 0.001 0.001 0.001 NC
40407M001 PINYON FLATS      7256 -2369636.008 -4761324.852  3511116.195 0.008 0.009 0.008 -0.024  0.014  0.004 0.001 0.001 0.001 NC
40407M002 PINYON_1     PIN1      -2369510.420 -4761207.197  3511396.105 0.008 0.009 0.008 -0.024  0.014  0.004 0.001 0.001 0.001 NC
40407M003 PINYON_1_PEQ PIN1      -2369510.406 -4761207.189  3511396.154 0.009 0.009 0.009 -0.024  0.014  0.004 0.001 0.001 0.001 NC
40408M001 FAIRBANKS    FAIR      -2281621.346 -1453595.783  5756961.940 0.005 0.006 0.006 -0.021 -0.004 -0.010 0.001 0.001 0.001 NC
40408S002 FAIRBANKS         7225 -2281547.210 -1453645.065  5756993.175 0.005 0.005 0.005 -0.021 -0.004 -0.010 0.001 0.001 0.001 NC
40420M002 VANDENBERG        7223 -2678094.832 -4525450.656  3597410.271 0.005 0.005 0.006 -0.028  0.030  0.018 0.001 0.001 0.001 NC
40420M006 VANDENBERG   VNDP      -2678089.797 -4525437.750  3597431.501 0.006 0.006 0.007 -0.028  0.030  0.018 0.001 0.001 0.001 NC
40420M007 VANDENBERG_P VNDP      -2678089.828 -4525437.762  3597431.521 0.018 0.018 0.018 -0.028  0.030  0.018 0.001 0.001 0.001 NC
40420M101 HARVEST      HARV      -2686069.183 -4527084.421  3589502.252 0.014 0.016 0.011 -0.028  0.030  0.018 0.001 0.001 0.001 NC
40424M006 KOKEE TEMPOR KOK2      -5543802.162 -2054603.464  2387872.812 0.023 0.024 0.015 -0.008  0.063  0.031 0.001 0.001 0.001 NC
40424S001 KOKEE_PARK        1311 -5543846.012 -2054563.820  2387814.017 0.006 0.006 0.007 -0.008  0.063  0.031 0.001 0.001 0.001 NC
40433M002 QUINCY            7109 -2517234.816 -4198556.222  4076569.684 0.005 0.006 0.006 -0.019  0.004 -0.005 0.001 0.001 0.001 NC
40433M004 QUINCY       QUIN 7221 -2517230.925 -4198595.209  4076531.275 0.005 0.006 0.006 -0.019  0.004 -0.005 0.001 0.001 0.001 NC
40440S003 WESTFORD          7209  1492206.672 -4458130.523  4296015.536 0.004 0.004 0.005 -0.014 -0.004  0.006 0.001 0.001 0.001 NC
40442M006 MCDONALD          7080 -1330021.003 -5328401.842  3236480.783 0.005 0.006 0.006 -0.011  0.000 -0.008 0.001 0.001 0.001 NC
40451M102 GREENBELT         7102  1130686.591 -4831353.048  3994110.936 0.005 0.006 0.006 -0.013 -0.004  0.004 0.001 0.001 0.001 NC
40456M001 PIETOWN      PIE1      -1640916.725 -5014781.174  3575447.128 0.006 0.006 0.006 -0.011  0.008 -0.016 0.001 0.002 0.001 NC
40456S001 PIETOWN           7234 -1640953.641 -5014816.001  3575411.875 0.005 0.005 0.006 -0.011  0.008 -0.016 0.001 0.002 0.001 NC
40460M001 SCRIPPS 1    SIO1      -2455521.695 -4767213.438  3441654.890 0.012 0.013 0.011 -0.014  0.000 -0.011 0.003 0.003 0.003 N 
40460M002 SCRIPPS_2    SIO2      -2455539.252 -4767224.129  3441628.855 0.018 0.018 0.018 -0.014  0.000 -0.011 0.003 0.003 0.003 N 
40460M003 SCRIPPS_2_PE SIO2      -2455539.240 -4767224.114  3441628.873 0.018 0.018 0.018 -0.014  0.000 -0.011 0.003 0.003 0.003 N 
40464M001 CARR HIL     CARR      -2620447.048 -4460941.705  3718442.644 0.018 0.018 0.018 -0.015 -0.001 -0.011 0.003 0.003 0.003 N 
40465S001 NORTH LIBERT      7612  -130872.196 -4762317.118  4226851.042 0.008 0.012 0.011 -0.017 -0.001 -0.002 0.003 0.003 0.003 N 
40499M002 RICHMOND     RCM2 7295   961318.986 -5674090.987  2740489.580 0.005 0.005 0.006 -0.008 -0.004  0.003 0.001 0.001 0.001 NC
40499S001 RICHMOND          7219   961258.110 -5674090.057  2740533.791 0.005 0.005 0.006 -0.008 -0.004  0.003 0.001 0.001 0.001 NC
41705M001 SANTIAGO          7400  1769699.547 -5044612.915 -3468259.979 0.010 0.011 0.009  0.001 -0.005  0.008 0.003 0.003 0.003 N 
41705M003 SANTIAGO     SANT       1769693.238 -5044574.084 -3468321.125 0.009 0.010 0.008  0.001 -0.005  0.008 0.003 0.003 0.003 N 
41705S006 SANTIAGO          1404  1769693.005 -5044504.473 -3468435.051 0.009 0.010 0.008  0.001 -0.005  0.008 0.003 0.003 0.003 N 
50103S010 TIDBINBILLA       1545 -4460935.287  2682765.726 -3674381.343 0.010 0.010 0.010 -0.039  0.004  0.042 0.002 0.002 0.002 NC
50103S017 TIDBINBILLA            -4460996.133  2682557.183 -3674443.928 0.010 0.011 0.011 -0.039  0.004  0.042 0.002 0.002 0.002 NC
50103M108 TIDBINBILLA  TIDB      -4460996.069  2682557.144 -3674443.875 0.010 0.011 0.011 -0.039  0.004  0.042 0.002 0.002 0.002 NC
50103S020 TIDBINBILLA  DS40      -4460988.024  2682362.787 -3674626.556 0.020 0.020 0.021 -0.039  0.004  0.042 0.002 0.002 0.002 NC
50103S021 TIDBINBILLA  DS41      -4460979.550  2682381.192 -3674624.153 0.020 0.020 0.021 -0.039  0.004  0.042 0.002 0.002 0.002 NC
50107M001 YARRAGADEE        7090 -2389006.790  5043329.321 -3078525.025 0.008 0.008 0.009 -0.045  0.008  0.053 0.002 0.002 0.002 NC
50116S002 HOBART            7242 -3950236.590  2522347.557 -4311562.679 0.013 0.012 0.012 -0.043  0.014  0.040 0.003 0.002 0.002 NC
50116S004 HOBART       HOB1      -3950184.097  2522364.543 -4311588.485 0.013 0.012 0.012 -0.043  0.014  0.040 0.003 0.002 0.002 NC
50126S004 TOWNSVILLE   TOWN      -5041024.809  3296980.136 -2090553.286 0.020 0.020 0.021 -0.033 -0.016  0.054 0.003 0.003 0.003 N 
50134M001 DARWIN       DARW      -4091358.714  4684606.790 -1408580.769 0.020 0.020 0.021 -0.038 -0.015  0.060 0.003 0.003 0.003 N 
50208S002 WELLINGTON   WELL      -4780648.775   436507.117 -4185440.328 0.019 0.019 0.016 -0.025  0.003  0.029 0.003 0.003 0.003 N 
66001M001 MC MURDO     MCMU      -1310695.228   310468.871 -6213363.471 0.013 0.016 0.011  0.010 -0.010 -0.003 0.003 0.003 0.003 N 
92201M003 PAMATAI      PAMA      -5245195.202 -3080472.322 -1912825.472 0.013 0.016 0.010 -0.042  0.052  0.031 0.003 0.003 0.003 N 
97301M210 KOUROU       KOUR       3839591.441 -5059567.527   579956.842 0.016 0.016 0.011 -0.006 -0.003  0.012 0.003 0.003 0.003 N