****************************************************************************** dorismail 07-Apr-2011 13:50:29 Message No 0743 ****************************************************************************** Author: "Jerome SAUNIER" Subject: Network / antenna change and raising at Rothera #### BEGIN HEADER #### DORISMail version 1.1 Subject: No 0743 : Network/ new point ROTHERA #### END HEADER #### Dear colleagues, In order to improve the International Terrestrial Reference Frame (ITRF) solutions, IGN in close collaboration with the British Antarctic Survey (BAS) carried out a new geodetic survey at Rothera between the DORIS station, GNSS stations and the tide gauge. On this occasion, the antenna was replaced and its support was modified, in the frame of a global action aiming at standardizing the antenna support models. The antenna is now supported by a 40 cm high stainless steel structure, set on the same concrete pillar as the two former antenna locations (ROTB and ROUB). The transmissions from the former antenna location (ROUB) stopped on January 31, and resumed on February 3 after the antenna raising and change. Please find below the installation characteristics and the coordinates of the new reference point : Concerned site: #### BEGIN SITE #### Site name : ROTHERA #### Site DOMES number : 66007 #### #### END SITE #### Characteristics of the new point: #### BEGIN STATION #### Four character ID : ROVB #### Antenna model : Starec 52291 type #### Station DOMES number : 66007S004 #### Date installed (dd/mm/yyyy) : 03/02/2011 #### Antenna support type : stainless steel structure 40cm high #### Installed on : concrete pillar 1.5m high #### #### END STATION #### The coordinates of the DORIS antenna reference point are: #### BEGIN COORDINATES #### Solution : ITRF2005 #### Note about the coordinates : (tie to ROUB) #### Epoch : 2000.0 #### Unit : metre #### X : 909182.640 #### Y : -2264787.503 #### Z : -5873052.546 #### Sig X : 0.002 #### Sig Y : 0.002 #### Sig Z : 0.002 #### #### END COORDINATES #### The ITRF velocities for the site are: #### BEGIN VELOCITIES #### Note about the velocities : #### Unit : metre / year #### VX : 0.0199 #### VY : -0.0044 #### VZ : 0.0008 #### Sig VX : .0003 #### Sig VY : .0003 #### Sig VZ : .0003 #### #### END VELOCITIES #### Best regards, Jerome Saunier Jérôme SAUNIER Réseaux et Services Internationaux Service de Géodésie et Nivellement Institut Géographique National 73, avenue de Paris 94 165 SAINT MANDE Cedex Cliquez sur l'url suivante https://www.mailcontrol.com/sr/8bKzkEU7mT7TndxI!oX7UoWpENiwadNGU3P8XviKSZWtz29cN39Ubwru9+iaTrObDukZHuuSOtybYw94u+b0NQ== si ce message est indésirable (pourriel). Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr