***ITRF2014***
                SAINT HELENA (STHL),  UNIDENTIFIED DEPENDENCY OF SAINT HELENA ISLANDS

 Retrieved from NGS DataBase on 12/13/21 at 23:25:35.
 _____________________________________________________________________________ 
|                                                                             |
|         Antenna Reference Point(ARP): SAINT HELENA CORS ARP                 |
|         ---------------------------------------------------                 |
|                             PID = DR7494                                    |
|                                                                             |
|                                                                             |
| ITRF2014 POSITION (EPOCH 2010.0)                                            |
| Published by the IGS in May 2020.                                           |
|     X =   6104817.201 m     latitude    =  15 56 33.12283 S                 |
|     Y =   -605828.029 m     longitude   = 005 40 02.44508 W                 |
|     Z =  -1740738.863 m     ellipsoid height =  453.191   m                 |
|                                                                             |
| ITRF2014 VELOCITY                                                           |
| Published by the IGS in May 2020.                                           |
|     VX =   0.0068 m/yr      northward =   0.0161 m/yr                       |
|     VY =   0.0222 m/yr      eastward  =   0.0228 m/yr                       |
|     VZ =   0.0181 m/yr      upward    =   0.0094 m/yr                       |
|                                                                             |
| L1 Phase Center of the current GPS antenna: SAINT HELENA CORS L1PC          |
| ---------------------------------------------------------------------       |
| The Topcon GPS/GLONASS/Galileo choke ring an antenna                        |
| (Antenna Code = TPSCR.G3        SCIS) was installed on 03Mar2010.           |
|        The L2 phase center is 0.036 m above the L1 phase center.            |
|                             PID = DR7495                                    |
|                                                                             |
|                                                                             |
| ITRF2014 POSITION (EPOCH 2010.0)                                            |
| Published by the IGS in May 2020.                                           |
|     X =   6104817.282 m     latitude    =  15 56 33.12284 S                 |
|     Y =   -605828.037 m     longitude   = 005 40 02.44507 W                 |
|     Z =  -1740738.887 m     ellipsoid height =  453.275   m                 |
|                                                                             |
| The ITRF2014 VELOCITY of the L1 PC is the same as that for the ARP.         |
|                                                                             |
|         Monument: SAINT HELENA GRP                                          |
|         --------------------------                                          |
|                             PID = DR7496                                    |
|         Inscribed: UNKNOWN                                                  |
|                                                                             |
|                                                                             |
| ITRF2014 POSITION (EPOCH 2010.0)                                            |
| Published by the IGS in May 2020.                                           |
|     X =   6104817.193 m     latitude    =  15 56 33.12283 S                 |
|     Y =   -605828.028 m     longitude   = 005 40 02.44508 W                 |
|     Z =  -1740738.861 m     ellipsoid height =  453.183   m                 |
|                                                                             |
| The ITRF2014 VELOCITY of the monument is the same as that for the ARP.      |
|_____________________________________________________________________________|


 * Latitude, longitude and ellipsoid height are computed from their
   corresponding cartesian coordinates using dimensions for the
   GRS 80 ellipsoid: semi-major axis = 6,378,137.0 meters
                          flattening = 1/298.257222101...


 * WARNING: Mixing of antenna types can lead to errors of up to 10 cm.
   in height unless antenna-phase-center variation and antenna-phase-center
   offset are properly modeled.  See next comment.

 * The coordinates shown on this page were computed using absolute antenna
   calibrations.  CORS coordinates began using absolute antenna calibrations
   beginning with IGS08 and NAD 83 (2011, MA11, PA11).  For additional
   information on the derivation of these positions and velocities and
   antenna calibrations consult:
   http://geodesy.noaa.gov/CORS/coords.shtml
   http://geodesy.noaa.gov/ANTCAL


 * For more site specific information on the equipment history and
   monumentation type consult:
   ftp://geodesy.noaa.gov/cors/station_log/sthl.log.txt
   http://geodesy.noaa.gov/cgi-cors/corsage_2.prl?site=sthl