MARION ISLAND DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 13/07/2005 Report type : UPDATE 1. Site location information Site name : MARION ISLAND Site DOMES number : 30313 Host agency : Department of environmental affairs City : Marion Island State or province : South Atlantic Ocean Country : SOUTH AFRICA Tectonic plate : Geological information : Geographical coordinates (ITRF) : North Latitude : -46 deg 52' 44'' East Longitude : 37 deg 51' 25'' Ellipsoid height : 92 m Approximate altitude : 30 m 2. DORIS antenna and reference point information 2.1 Four character ID : MARA Antenna model : Alcatel Antenna serial number : 52 IERS DOMES number : 30313S001 CNES/IGN number : 303131 CTDP number : 22 Date installed (dd/mm/yy): 15/05/1987 Date removed (dd/mm/yy) : 08/07/1998 Antenna support type : Guyed 2 metre tower Installed on : Concrete pad Height above ground mark : 2.190 m Ground mark type : Glued target Ground mark DOMES number : 30313M001 Notes : 2.2 Four character ID : MARB Antenna model : Starec 52291 type Antenna serial number : 51 IERS DOMES number : 30313S002 CNES/IGN number : 303132 CTDP number : 87 Date installed (dd/mm/yy): 31/05/1999 Date removed (dd/mm/yy) : 15/08/2004 Antenna support type : Guyed 2 metre tower Installed on : Concrete pad Height above ground mark : 2.427 m Ground mark type : Glued target Ground mark DOMES number : 30313M001 Notes : Antenna tilted due to corrosion of the base plate : 2 GHz phase centre drift = 67 mm towards North 2.3 Four character ID : MATB Antenna model : Starec 52291 type Antenna serial number : 81 IERS DOMES number : 30313S003 CNES/IGN number : 303133 CTDP number : 245 Date installed (dd/mm/yy): 21/08/2004 Date removed (dd/mm/yy) : Antenna support type : 30 cm sided very rigid metal tower, 2 m high Installed on : Concrete pad Height above ground mark : 2.441 m Ground mark type : Glued target Ground mark DOMES number : 30313M001 Notes : 3. DORIS beacons information 3.1 Beacon serial number : 86 27 022 Beacon model : 1.0 USO serial number : 1.353 4 Char. ID of the REF point : MARA Date installed (dd/mm/yy) : 15/05/1987 Date removed (dd/mm/yy) : 25/07/1994 3.2 Beacon serial number : 86 27 010 Beacon model : 1.0 USO serial number : 1.472 4 Char. ID of the REF point : MARA Date installed (dd/mm/yy) : 16/05/1994 Date removed (dd/mm/yy) : 31/05/1995 3.3 Beacon serial number : 86 33 045 Beacon model : 1.0 USO serial number : 1.643 4 Char. ID of the REF point : MARA Date installed (dd/mm/yy) : 27/03/1995 Date removed (dd/mm/yy) : 08/07/1998 3.4 Beacon serial number : 86 33 052 Beacon model : 1.0 USO serial number : 1.685 4 Char. ID of the REF point : MARB Date installed (dd/mm/yy) : 28/05/1999 Date removed (dd/mm/yy) : 15/09/1999 3.5 Beacon serial number : 86 33 042 Beacon model : 1.0 USO serial number : 2.1144 4 Char. ID of the REF point : MARB Date installed (dd/mm/yy) : 14/01/2000 Date removed (dd/mm/yy) : 18/04/2003 3.6 Beacon serial number : 28 19 018 Beacon model : 3.0 USO serial number : 3.282 4 Char. ID of the REF point : MARB Date installed (dd/mm/yy) : 19/04/2003 Date removed (dd/mm/yy) : 20/08/2004 3.7 Beacon serial number : 28 19 018 Beacon model : 3.0 USO serial number : 3.282 4 Char. ID of the REF point : MATB Date installed (dd/mm/yy) : 21/08/2004 Date removed (dd/mm/yy) : 4. ITRF coordinates and velocities of the current DORIS ref. point (MATB) Solution : ITRF2000 Epoch : 1997.0 X = 3448405.755 m Y = 2680356.388 m Z = -4632640.596 m Sig X = 0.031 m Sig Y = 0.032 m Sig Z = 0.029 m VX = -0.0053 m/y VY = 0.0027 m/y VZ = 0.0020 m/y Sig VX = 0.0032 m/y Sig VY = 0.0034 m/y Sig VZ = 0.0029 m/y 5. IERS colocation information 6. Tide Gauge colocation information 6.1 Name : Marion Is. Location : Marion Is. GLOSS number : 20 Distance : 1 km Notes : 7. Local site ties 7.1 Point description : DORIS Alcatel antenna reference point (MARA) DOMES number : 30313S001 Differential components from the current DORIS ref. point (MATB) to the above point (in the ITRS) : dX (m) : -0.135 dY (m) : -0.101 dZ (m) : 0.186 Accuracy (m) : 0.005 Date measured : August 2004 Additional information : Survey by HARTRAO 7.2 Point description : DORIS Starec antenna reference point (MARB) DOMES number : 30313S002 Differential components from the current DORIS ref. point (MATB) to the above point (in the ITRS) : dX (m) : -0.008 dY (m) : -0.006 dZ (m) : 0.010 Accuracy (m) : 0.002 Date measured : August 2004 Additional information : Survey by HARTRAO 7.3 Point description : Mark under the DORIS antenna DOMES number : 30313M001 Differential components from the current DORIS ref. point (MATB) to the above point (in the ITRS) : dX (m) : -1.317 dY (m) : -1.020 dZ (m) : 1.784 Accuracy (m) : 0.001 Date measured : August 2004 Additional information : Survey by HARTRAO 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 : m above the current DORIS ref. point (MATB) 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 (ED/AL/MA) : 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