****************************************************************************** dorismail 02-Nov-2026 16:16:29 Message No 1507 ****************************************************************************** Author: Jerome Saunier Subject: Network/ new point TRISTAN DA CUNHA #### BEGIN HEADER #### DORISMail version 1.2 Subject: No 1507 : Network/ new point TRISTAN DA CUNHA #### END HEADER #### Dear colleagues, The DORIS antenna at TRISTAN DA CUNHA has been replaced following a major s= torm on the island that destroyed it last July. Please find below the installation characteristics and the coordinates of t= he reference point : Concerned site: #### BEGIN SITE #### Site name : TRISTAN DA CUNHA #### Site DOMES number : 30604 #### #### END SITE #### Characteristics of the new point: #### BEGIN STATION #### Four character ID : TRKC #### Antenna model : Starec C #### Station DOMES number : 30604S005 #### Date installed (dd/mm/yyyy) : 08/10/2026 #### Antenna support type : 3 m high very rigid metal tower #### Installed on : concrete pad #### #### END STATION #### The coordinates of the DORIS antenna reference point are: #### BEGIN COORDINATES #### Solution : dpod2020_070 #### Note about the coordinates : tie to TRJC #### Epoch : 2000.0 #### Unit : metre #### X : 4978474.7436 #### Y : -1086612.1421 #### Z : -3823190.4315 #### Sig X : #### Sig Y : #### Sig Z : #### #### END COORDINATES #### The ITRF velocities for the site are: #### BEGIN VELOCITIES #### Note about the velocities : dpod2020_070 #### Unit : metre / year #### VX : 0.01373 #### VY : 0.01901 #### VZ : 0.01532 #### Sig VX : #### Sig VY : #### Sig VZ : #### #### END VELOCITIES #### Replacing previous DORIS antenna : TRJC Date removed (dd/mm/yyyy) : 07/07/2026 Best regards, Jerome Saunier ________________________________________ Reseaux et Services en Geodesie Spatiale Service de Geodesie et de Metrologie IGN 73, avenue de Paris 94165 St-MANDE ign.fr