BETIO DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 9/12/2008 Report type : UPDATE 1. Site location information Site name : BETIO Site DOMES number : 50305 Host agency : Kiribati Meteorological Service City : Betio State or province : Tarawa atoll Country : KIRIBATI Tectonic plate (PB2002) : Pacific Geological information : Geographical coordinates (ITRF) : North Latitude : 1 deg 21' 17'' East Longitude : 172 deg 55' 23'' Ellipsoid height : 37 m Approximate altitude : 6 m 2. DORIS antenna and reference point information 2.1 Four character ID : BETB Antenna model : Starec 52291 type Antenna serial number : 121 IERS DOMES number : 50305S001 CNES/IGN number : 503051 CTDP number : 272 Date installed (dd/mm/yy): 22/10/2006 Date removed (dd/mm/yy) : Antenna support type : 1.5 meter high, 40 cm sided concrete pillar Installed on : pillar extends 2 m deep into the ground Height above ground mark : 0.648 m Ground mark type : Domed brass mark 12 mm diameter Ground mark DOMES number : 50305M002 Notes : 3. DORIS beacons information 3.1 Beacon serial number : 28 19 004 Beacon model : 3.0 USO serial number : 3.260 4 Char. ID of the REF point : BETB Date installed (dd/mm/yy) : 22/10/2006 Date removed (dd/mm/yy) : 4. ITRF coordinates and velocities of the current DORIS ref. point (BETB) Solution : DPOD2005 Epoch : 2000.0 X = -6327823.292 m Y = 785599.268 m Z = 149786.304 m Sig X = 0.003 m Sig Y = 0.002 m Sig Z = 0.001 m VX = 0.0091 m/y VY = 0.0672 m/y VZ = 0.0303 m/y Sig VX = m/y Sig VY = m/y Sig VZ = m/y 5. IERS co-location information 5.1 Instrument type : GPS Status : Permanent DOMES number of the instrument ref. point : 50305M001 Notes : KIRI GPS station (Geoscience Australia) 6. Tide gauge co-location information 6.1 Name : Tarawa Location : Betio GLOSS number : 113 Distance : 1.6 km Notes : 7. Local site ties 7.1 Point description : KIRI GPS station (stainless steel spigot on pillar) DOMES number : 50305M001 Differential components from the current DORIS ref. point (BETB) to the above point (in the ITRS) : dX (m) : 0.754 dY (m) : 4.561 dZ (m) : -17.353 Accuracy (m) : 0.002 Date measured : 10/2006 Additional information : Survey by IGN-F 7.2 Point description : DORIS domed brass mark on concrete pillar DOMES number : 50305M002 Differential components from the current DORIS ref. point (BETB) to the above point (in the ITRS) : dX (m) : 0.643 dY (m) : -0.080 dZ (m) : -0.015 Accuracy (m) : 0.001 Date measured : 10/2006 Additional information : Survey by IGN-F 8. Meteorological Instrumentation 8.1 Humidity sensor Model : HMP45D Manufacturer : VAISALA Accuracy : +/- 3 percents Notes : 8.2 Pressure sensor Model : PTU200 class B Manufacturer : VAISALA Accuracy : +/- 0.25 mb Height : 0.3 m below the current DORIS ref. point (BETB) Notes : long term stability = +/- 0.1 mb/year 8.3 Temperature sensor Model : HMP45D Manufacturer : VAISALA Accuracy : +/- 0.5 deg C Notes : 9. DORIS network contacts Primary contact: Name : Herve FAGARD Agency : Institut Geographique National Mailing address : Service de Geodesie et de Nivellement : 2 Avenue PASTEUR : 94165 SAINT-MANDE CEDEX FRANCE Telephone : + 33 1 43 98 81 48 Fax : + 33 1 43 98 84 50 E-mail : herve (.) fagard (@) ign.fr Secondary contact: Name : Francois BOLDO Agency : Institut Geographique National Mailing address : CNES (DCT/ME/OT) : 18 Avenue Edouard BELIN : 31401 TOULOUSE Cedex FRANCE Telephone : + 33 5 61 27 40 72 Fax : + 33 5 61 28 25 95 E-mail : Simb.Doris@cnes.fr