ST HELENA DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 29/01/2013 Report type : UPDATE 1. Site location information Site name : ST HELENA Site DOMES number : 30606 Host agency : Meteorological station City : St Helena Island State or province : South Atlantic Ocean Country : UNITED KINGDOM (South Atlantic Ocean) Tectonic plate : AFRC Geological information : Geographical coordinates (ITRF) : North Latitude : -15 deg 56' 32'' East Longitude : -5 deg 40' 3'' Ellipsoid height : 453 m Approximate altitude : 439 m 2. DORIS antenna and reference point information 2.1 Four character ID : HELA Antenna model : Alcatel Antenna serial number : 37 IERS DOMES number : 30606S002 CNES/IGN number : 306061 DORIS SSALTO number : 43 Date installed (dd/mm/yy): 15/06/1987 Date removed (dd/mm/yy) : 08/04/1997 Antenna support type : 1 m tubular mast Installed on : Metallic beam of a 1 storied building Height above ground mark : m Ground mark type : Ground mark DOMES number : Notes : 2.2 Four character ID : HELB Antenna model : Starec 52290 type Antenna serial number : 42 IERS DOMES number : 30606S003 CNES/IGN number : 306062 DORIS SSALTO number : 75 Date installed (dd/mm/yy): 09/04/1997 Date removed (dd/mm/yy) : 20/03/2003 Antenna support type : Guyed 2 metre tower Installed on : Concrete pad Height above ground mark : 2.402 m Ground mark type : Domed brass mark 12 mm diameter Ground mark DOMES number : 30606M002 Notes : 2.3 Four character ID : HEMB Antenna model : Starec 52291 type Antenna serial number : 86 IERS DOMES number : 30606S004 CNES/IGN number : 306063 DORIS SSALTO number : 231 Date installed (dd/mm/yy): 21/03/2003 Date removed (dd/mm/yy) : Antenna support type : two-meter high, 32 cm sided metal tower Installed on : Concrete pad Height above ground mark : 2.396 m Ground mark type : Domed brass mark 12 mm diameter Ground mark DOMES number : 30606M002 Notes : 3. DORIS beacons information 3.1 Beacon serial number : 8633043 Beacon model : 1.0 USO serial number : 1.545 4 Char. ID of the REF point : HELA Date installed (dd/mm/yy) : 01/06/1989 Date removed (dd/mm/yy) : 04/11/1996 3.2 Beacon serial number : 8627019 Beacon model : 1.0 USO serial number : 1.539 4 Char. ID of the REF point : HELA Date installed (dd/mm/yy) : 21/12/1996 Date removed (dd/mm/yy) : 08/04/1997 3.3 Beacon serial number : 9429005 Beacon model : 2.0 USO serial number : 2.649 4 Char. ID of the REF point : HELB Date installed (dd/mm/yy) : 09/04/1997 Date removed (dd/mm/yy) : 26/10/1998 3.4 Beacon serial number : 8627019 Beacon model : 1.0 USO serial number : 1.539 4 Char. ID of the REF point : HELB Date installed (dd/mm/yy) : 27/10/1998 Date removed (dd/mm/yy) : 16/09/1999 3.5 Beacon serial number : 9845108 Beacon model : 2.0 USO serial number : 3.164 4 Char. ID of the REF point : HELB Date installed (dd/mm/yy) : 16/09/1999 Date removed (dd/mm/yy) : 01/08/2002 3.6 Beacon serial number : 2819011 Beacon model : 3.0 USO serial number : 3.243 4 Char. ID of the REF point : HELB Date installed (dd/mm/yy) : 01/08/2002 Date removed (dd/mm/yy) : 20/03/2003 3.7 Beacon serial number : 2819011 Beacon model : 3.0 USO serial number : 3.243 4 Char. ID of the REF point : HEMB Date installed (dd/mm/yy) : 21/03/2003 Date removed (dd/mm/yy) : 19/12/2011 3.8 Beacon serial number : 2819052 Beacon model : 3.0 USO serial number : 3.405 4 Char. ID of the REF point : HEMB Date installed (dd/mm/yy) : 19/12/2011 Date removed (dd/mm/yy) : 4. ITRF coordinates and velocities of the current DORIS ref. point (HEMB) Solution : ITRF2008 Epoch : 2005.0 X = 6104823.144 m Y = -605830.791 m Z = -1740720.009 m Sig X = 0.002 m Sig Y = 0.002 m Sig Z = 0.001 m VX = 0.0059 m/y VY = 0.0229 m/y VZ = 0.0162 m/y Sig VX = 0.0007 m/y Sig VY = 0.0009 m/y Sig VZ = 0.0005 m/y 5. IERS colocation information 5.1 Instrument type : GNSS Status : Permanent DOMES number of the instrument ref. point : 30606M003 Notes : IGS station (STHL) 6. Tide Gauge colocation information 6.1 Name : St Helena Location : St Helena GLOSS number : 264 Distance : 5.9 km Notes : 7. Local site ties 7.1 Point description : DORIS Alcatel antenna reference point (HELA) DOMES number : 30606S002 Differential components from the current DORIS ref. point (HEMB) to the above point (in the ITRS) : dX (m) : 5.251 dY (m) : -6.464 dZ (m) : 13.684 Accuracy (m) : 0.003 Date measured : 01/08/1992 Additional information : Survey by IGN-F 7.2 Point description : DORIS mark in concrete block DOMES number : 30606M002 Differential components from the current DORIS ref. point (HEMB) to the above point (in the ITRS) : dX (m) : -2.292 dY (m) : 0.228 dZ (m) : 0.659 Accuracy (m) : 0.001 Date measured : 01/03/2003 Additional information : Survey by IGN-F 7.3 Point description : DORIS Starec antenna reference point (HELB) DOMES number : 30606S003 Differential components from the current DORIS ref. point (HEMB) to the above point (in the ITRS) : dX (m) : 0.009 dY (m) : 0.001 dZ (m) : -0.001 Accuracy (m) : 0.001 Date measured : 01/03/2003 Additional information : Survey by IGN-F of the HELB (stable) position between 2002-07-31 and 2003-03-20 7.4 Point description : Tide gauge bench mark (POL18/2003) DOMES number : Differential components from the current DORIS ref. point (HEMB) to the above point (in the ITRS) : dX (m) : -292.211 dY (m) : -5404.830 dZ (m) : 2439.278 Accuracy (m) : 0.003 Date measured : 01/03/2003 Additional information : Survey by IGN-F 7.5 Point description : IGS station (STHL) :SCIGN mount DOMES number : 30606M003 Differential components from the current DORIS ref. point (HEMB) to the above point (in the ITRS) : dX (m) : -6.011 dY (m) : 2.665 dZ (m) : -18.933 Accuracy (m) : 0.001 Date measured : 05/06/2010 Additional information : Survey by IGN-F 2010 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 hPa Height : 1.04 m above the current DORIS ref. point (HEMB) Notes : long term stability = +/- 0.1 hPa/year 8.3 Temperature sensor Model : HMP45D Manufacturer : VAISALA Accuracy : +/- 0.5 deg C Notes : 9. DORIS network contacts Primary contact: Name : Jerome SAUNIER Agency : Institut Geographique National Mailing address : Service de Geodesie et Nivellement : 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 : Francois BOLDO Agency : Institut Geographique National Mailing address : CNES (DCT/ME/OC) : 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