DJIBOUTI DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 01/02/2012 Report type : UPDATE 1. Site location information Site name : DJIBOUTI Site DOMES number : 39901 Host agency : Observatoire géophysique d'Arta (CERD) City : Arta State or province : Country : DJIBOUTI Tectonic plate : AFRC Geological information : Geographical coordinates (ITRF) : North Latitude : 11 deg 31' 34'' East Longitude : 42 deg 50' 47'' Ellipsoid height : 716 m Approximate altitude : 727 m 2. DORIS antenna and reference point information 2.1 Four character ID : DJIA Antenna model : Alcatel Antenna serial number : 19 IERS DOMES number : 39901S002 CNES/IGN number : 399011 DORIS SSALTO number : 25 Date installed (dd/mm/yy): 10/03/1987 Date removed (dd/mm/yy) : 04/07/2000 Antenna support type : Guyed 1 metre tower Installed on : Top of a load-bearing wall of a 1 storied building. Height above ground mark : 1.458 m Ground mark type : Metallic target Ground mark DOMES number : 39901M002 Notes : 2.2 Four character ID : DJIB Antenna model : Starec 52291 type Antenna serial number : 67 IERS DOMES number : 39901S003 CNES/IGN number : 399012 DORIS SSALTO number : 94 Date installed (dd/mm/yy): 04/07/2000 Date removed (dd/mm/yy) : 28/06/2006 Antenna support type : 0.5 meter tower Installed on : Top of angle structure of a load bearing wall of a one storied building Height above ground mark : 0.932 m Ground mark type : Domed brass mark 12 mm diam. Ground mark DOMES number : 39901M003 Notes : Progressive antenna tilt due to the corrosion of the aluminium supporting plate 2.3 Four character ID : DJIB Antenna model : STAREC 52291 type Antenna serial number : 130 IERS DOMES number : 39901S003 CNES/IGN number : 399012 DORIS SSALTO number : 94 Date installed (dd/mm/yy): 28/06/2006 Date removed (dd/mm/yy) : Antenna support type : 0.5 meter tower Installed on : Top of angle structure of a load bearing wall of a one storied building Height above ground mark : 0.932 m Ground mark type : Domed brass mark 12 mm diam. Ground mark DOMES number : 39901M003 Notes : New antenna on a stainless steel supporting plate 3. DORIS beacons information 3.1 Beacon serial number : 8633025 Beacon model : 1.0 USO serial number : 1.408 4 Char. ID of the REF point : DJIA Date installed (dd/mm/yy) : 10/03/1987 Date removed (dd/mm/yy) : 11/03/1994 3.2 Beacon serial number : 8633027 Beacon model : 1.0 USO serial number : 1.531 4 Char. ID of the REF point : DJIA Date installed (dd/mm/yy) : 11/03/1994 Date removed (dd/mm/yy) : 27/06/1998 3.3 Beacon serial number : 8627012 Beacon model : 1.0 USO serial number : 1.480 4 Char. ID of the REF point : DJIA Date installed (dd/mm/yy) : 30/07/1998 Date removed (dd/mm/yy) : 04/07/2000 3.4 Beacon serial number : 8627012 Beacon model : 1.0 USO serial number : 1.480 4 Char. ID of the REF point : DJIB Date installed (dd/mm/yy) : 05/07/2000 Date removed (dd/mm/yy) : 21/05/2001 3.5 Beacon serial number : 8627024 Beacon model : 1.0 USO serial number : 2.321 4 Char. ID of the REF point : DJIB Date installed (dd/mm/yy) : 19/07/2001 Date removed (dd/mm/yy) : 05/05/2003 3.6 Beacon serial number : 2819024 Beacon model : 3.0 USO serial number : 3.300 4 Char. ID of the REF point : DJIB Date installed (dd/mm/yy) : 23/07/2003 Date removed (dd/mm/yy) : 31/07/2003 3.7 Beacon serial number : 2819022 Beacon model : 3.0 USO serial number : 3.318 4 Char. ID of the REF point : DJIB Date installed (dd/mm/yy) : 01/08/2003 Date removed (dd/mm/yy) : 17/11/2003 3.8 Beacon serial number : 2819038 Beacon model : 3.0 USO serial number : 3.327 4 Char. ID of the REF point : DJIB Date installed (dd/mm/yy) : 18/11/2003 Date removed (dd/mm/yy) : 02/05/2005 3.9 Beacon serial number : 2819055 Beacon model : 3.0 USO serial number : 3.350 4 Char. ID of the REF point : DJIB Date installed (dd/mm/yy) : 20/08/2005 Date removed (dd/mm/yy) : 4. ITRF coordinates and velocities of the current DORIS ref. point (DJIB) Solution : DPOD2008 Epoch : 2005.0 X = 4583132.897 m Y = 4250944.048 m Z = 1266229.126 m Sig X = 0.001 m Sig Y = 0.001 m Sig Z = 0.001 m VX = -0.0224 m/y VY = 0.0216 m/y VZ = 0.0176 m/y Sig VX = 0.0012 m/y Sig VY = 0.0012 m/y Sig VZ = 0.0007 m/y 5. IERS colocation information 6. Tide Gauge colocation information 6.1 Name : Djibouti Location : Djibouti GLOSS number : 2 Distance : 34 km Notes : 7. Local site ties 7.1 Point description : DORIS Alcatel antenna reference point (DJIA) DOMES number : 39901S002 Differential components from the current DORIS ref. point (DJIB) to the above point (in the ITRS) : dX (m) : -13.705 dY (m) : 8.282 dZ (m) : 18.767 Accuracy (m) : 0.001 Date measured : 01/07/2000 Additional information : Survey by IGN-F 7.2 Point description : GPS mark ARO 0 (Epoch92) DOMES number : 39901M001 Differential components from the current DORIS ref. point (DJIB) to the above point (in the ITRS) : dX (m) : -44.613 dY (m) : 35.326 dZ (m) : 12.406 Accuracy (m) : 0.001 Date measured : 01/07/2000 Additional information : Survey by IGN-F 7.3 Point description : GPS pillar / threaded hole DOMES number : 39901M011 Differential components from the current DORIS ref. point (DJIB) to the above point (in the ITRS) : dX (m) : -46.589 dY (m) : 38.270 dZ (m) : 13.810 Accuracy (m) : 0.001 Date measured : 01/07/2000 Additional information : Survey by IGN-F 7.4 Point description : Mark under the DORIS Starec antenna DJIB DOMES number : 39901M003 Differential components from the current DORIS ref. point (DJIB) to the above point (in the ITRS) : dX (m) : -0.670 dY (m) : -0.621 dZ (m) : -0.186 Accuracy (m) : 0.001 Date measured : 01/07/2000 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 hPa Height : 0.7 m below the current DORIS ref. point (DJIB) 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 de 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/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