GAVDOS DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 24/10/2023 Report type : UPDATE 1. Site location information Site name : GAVDOS Site DOMES number : 12618 Host agency : Technical University of Crete City : Gavdos Island State or province : Crete Country : GREECE Tectonic plate : EURA Geological information : Geographical coordinates (ITRF) : North Latitude : 34 deg 50' 19'' East Longitude : 24 deg 6' 31'' Ellipsoid height : 124 m Approximate altitude : 109 m 2. DORIS antenna and reference point information 2.1 Four character ID : GAVB Antenna model : Starec 52291 type Antenna serial number : 115 IERS DOMES number : 12618S001 CNES/IGN number : 126181 DORIS SSALTO number : 234 Date installed (dd/mm/yy): 27/09/2003 Date removed (dd/mm/yy) : 27/03/2014 Antenna support type : 1.1 m high, 0.4 m diameter concrete pillar Installed on : limestone outcrop Height above ground mark : 0.495 m Ground mark type : Domed brass screw Ground mark DOMES number : 12618M002 Notes : 2.2 Four character ID : GAVC Antenna model : Starec C type Antenna serial number : 212 IERS DOMES number : 12618S002 CNES/IGN number : 126181 DORIS SSALTO number : 1234 Date installed (dd/mm/yy): 25/09/2023 Date removed (dd/mm/yy) : Antenna support type : 0.4 m stainless steel tripod Installed on : 1.7 m high pillar Height above ground mark : 0.828 m Ground mark type : Domed brass screw Ground mark DOMES number : 12618M004 Notes : 3. DORIS beacons information 3.1 Beacon serial number : 2819033 Beacon model : 3.0 USO serial number : 3.265 4 Char. ID of the REF point : GAVB Date installed (dd/mm/yy) : 17/09/2003 Date removed (dd/mm/yy) : 30/10/2003 3.2 Beacon serial number : 2819025 Beacon model : 3.0 USO serial number : 3.340 4 Char. ID of the REF point : GAVB Date installed (dd/mm/yy) : 01/12/2003 Date removed (dd/mm/yy) : 09/05/2004 3.3 Beacon serial number : 2819031 Beacon model : 3.0 USO serial number : 3.216 4 Char. ID of the REF point : GAVB Date installed (dd/mm/yy) : 21/02/2006 Date removed (dd/mm/yy) : 23/08/2010 3.4 Beacon serial number : 2819009 Beacon model : 3.0 USO serial number : 3.335 4 Char. ID of the REF point : GAVB Date installed (dd/mm/yy) : 31/10/2010 Date removed (dd/mm/yy) : 27/03/2014 3.5 Beacon serial number : 22154081i Beacon model : 4.0 USO serial number : 4.P0063 4 Char. ID of the REF point : GAVC Date installed (dd/mm/yy) : 25/09/2023 Date removed (dd/mm/yy) : 4. ITRF coordinates and velocities of the current DORIS ref. point (GAVC) Solution : ITRF2020 Epoch : 2000.0 X = 4783636.154 m Y = 2140691.252 m Z = 3623260.379 m Sig X = 0.001 m Sig Y = 0.002 m Sig Z = 0.003 m VX = 0.00319 m/y VY = 0.01174 m/y VZ = -0.01004 m/y Sig VX = m/y Sig VY = m/y Sig VZ = m/y 5. IERS colocation information 6. Tide Gauge colocation information 6.1 Name : Karave Location : Gavdos harbour GLOSS number : Distance : 1.4 km Notes : 7. Local site ties 7.1 Point description : DORIS Starec antenna reference point (GAVB) DOMES number : 12618S001 Differential components from the DORIS ref. point (GAVC) to the above point (in the ITRS) : dX (m) : 0.363 dY (m) : 6.315 dZ (m) : -5.043 Accuracy (m) : 0.002 Date measured : 23/09/2023 Additional information : Survey by IGN-F 7.2 Point description : Domed brass mark on top of DORIS concrete pillar DOMES number : 12618M004 Differential components from the DORIS ref. point (GAVC) to the above point (in the ITRS) : dX (m) : -0.621 dY (m) : -0.277 dZ (m) : -0.473 Accuracy (m) : 0.001 Date measured : 23/09/2023 Additional information : Survey by IGN-F 7.3 Point description : IGS station (GVDG) DOMES number : 12618M003 Differential components from the DORIS ref. point (GAVC) to the above point (in the ITRS) : dX (m) : 1.772 dY (m) : 38.145 dZ (m) : -25.775 Accuracy (m) : 0.002 Date measured : 23/09/2023 Additional information : Survey by IGN-F 8. Meteorological Instrumentation 8.1 Humidity sensor Model : AM2315 Manufacturer : AOSONG Accuracy : +/- 2 percents Notes : 8.2 Pressure sensor Model : BMP280 Manufacturer : Bosch Accuracy : +/- 0.12 hPa, equiv. to +/- 1 m Height : m below the current DORIS ref. point (GAVC) Notes : Long term stability +/- 1 hPa per year 8.3 Temperature sensor Model : AM2315 Manufacturer : AOSONG Accuracy : +/- 0.1 deg C Notes : 9. DORIS network contacts Primary contact: Name : Jerome SAUNIER Agency : IGN Institut Geographique National Mailing address : Service de Geodesie et de Metrologie : 73 avenue de Paris : 94165 SAINT-MANDE Cedex FRANCE Telephone : + 33 1 43 98 83 63 Fax : + 33 1 43 98 84 50 E-mail : jerome (.) saunier (@) ign.fr Secondary contact: Name : Vincent GARCIA Agency : CNES Centre National d'Etudes Spatiales Mailing address : CNES (DNO/TSA/IS) : 18 Avenue Edouard Belin : 31401 TOULOUSE Cedex FRANCE Telephone : + 33 5 61 27 37 75 Fax : E-mail : vincent (.) garcia (@) cnes.fr