MALE DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 13/02/2023 Report type : UPDATE 1. Site location information Site name : MALE Site DOMES number : 22901 Host agency : Maldives Meteorological Service City : Male Airport State or province : Hulhule island Country : Maldives Tectonic plate : INDI Geological information : Geographical coordinates (ITRF) : North Latitude : 4 deg 11' 34'' East Longitude : 73 deg 31' 41'' Ellipsoid height : -92 m Approximate altitude : 4 m 2. DORIS antenna and reference point information 2.1 Four character ID : MALB Antenna model : Starec 52291 type Antenna serial number : 113 IERS DOMES number : 22901S002 CNES/IGN number : 229011 DORIS SSALTO number : 248 Date installed (dd/mm/yy): 15/01/2005 Date removed (dd/mm/yy) : 22/09/2021 Antenna support type : 30 cm sided very rigid metal tower, 2 m high Installed on : Reinforced concrete block, 0.9 m sided,1 m deep Height above ground mark : 2.371 m Ground mark type : Steel bolt, 23 mm diameter Ground mark DOMES number : 22901M002 Notes : 2.2 Four character ID : MALC Antenna model : Starec C type Antenna serial number : 191 IERS DOMES number : 22901S003 CNES/IGN number : 229011 DORIS SSALTO number : 1248 Date installed (dd/mm/yy): 24/09/2021 Date removed (dd/mm/yy) : Antenna support type : 2 m high Leclerc tower Installed on : concrete pad Height above ground mark : 2.371 m Ground mark type : Hexagonal domed brass mark Ground mark DOMES number : 22901M004 Notes : 3. DORIS beacons information 3.1 Beacon serial number : 2819045 Beacon model : 3.0 USO serial number : 3.211 4 Char. ID of the REF point : MALB Date installed (dd/mm/yy) : 13/01/2005 Date removed (dd/mm/yy) : 23/05/2010 3.2 Beacon serial number : 2819048 Beacon model : 3.0 USO serial number : 3.400 4 Char. ID of the REF point : MALB Date installed (dd/mm/yy) : 23/05/2010 Date removed (dd/mm/yy) : 10/06/2013 3.3 Beacon serial number : 2819010 Beacon model : 3.0 USO serial number : 3.226 4 Char. ID of the REF point : MALB Date installed (dd/mm/yy) : 10/06/2013 Date removed (dd/mm/yy) : 22/09/2021 3.4 Beacon serial number : 19104019I Beacon model : 4.0 USO serial number : 4.P0017 4 Char. ID of the REF point : MALC Date installed (dd/mm/yy) : 24/09/2021 Date removed (dd/mm/yy) : 4. ITRF coordinates and velocities of the current DORIS ref. point (MALC) Solution : dpod2014_054 (tie to MALB) Epoch : 2000.0 X = 1803660.191 m Y = 6100020.950 m Z = 463204.544 m Sig X = 0.000 m Sig Y = 0.003 m Sig Z = 0.002 m VX = -0.0434 m/y VY = 0.0096 m/y VZ = 0.0347 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 : Male Location : Male airport GLOSS number : 28 Distance : 477 m Notes : 7. Local site ties 7.1 Point description : DORIS antenna reference point (MALB) DOMES number : 22901S002 Differential components from the DORIS ref. point (MALB) to the above point (in the ITRS) : dX (m) : 23.214 dY (m) : -5.767 dZ (m) : -11.775 Accuracy (m) : 0.001 Date measured : 24/09/2021 Additional information : Survey by IGN-F 7.2 Point description : Mark under DORIS antenna (MALC) DOMES number : 22901M004 Differential components from the DORIS ref. point (MALC) to the above point (in the ITRS) : dX (m) : -0.685 dY (m) : -2.318 dZ (m) : -0.176 Accuracy (m) : 0.001 Date measured : 24/09/2021 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 (MALC) 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