DJIBOUTI DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 6/05/2004 Report type : UPDATE 1. Site location information Site name : DJIBOUTI Site DOMES number : 39901 Host agency : ISERST (Observatoire d'Arta) City : Arta State or province : Country : DJIBOUTI Tectonic plate : AFRC Geological information : Geographical coordinates (ITRF) : North Latitude : 11 deg 31' 35'' East Longitude : 42 deg 50' 48'' Ellipsoid height : 716 m Approximate altitude : 730 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 CTDP 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 CTDP number : 94 Date installed (dd/mm/yy): 04/07/2000 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 : 39901 Notes : 3. DORIS beacons information 3.1 Beacon serial number : 86 33 025 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 : 86 33 027 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 : 86 27 012 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 : 86 27 012 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 : 86 27 024 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 : 28 19 024 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 : 28 19 022 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 : 28 19 038 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) : 4. ITRF coordinates and velocities of the current DORIS ref. point (DJIB) Solution : ITRF2000 (connection with DJIA) Epoch : 1997.0 X = 4583133.100 m Y = 4250943.901 m Z = 1266228.963 m Sig X = 0.007 m Sig Y = 0.007 m Sig Z = 0.004 m VX = -0.0195 m/y VY = 0 .0188 m/y VZ = 0 .0194 m/y Sig VX = 0.0034 m/y Sig VY = 0.0035 m/y Sig VZ = 0.0019 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 : July 2000 Additional information : Survey by IGN-F 7.2 Point description : Mark under the DORIS Starec antenna DJIB DOMES number : 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 : July 2000 Additional information : Survey by IGN-F 7.3 Point description : GPS pillar / threaded hole DOMES number : 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 : July 2000 Additional information : Survey by IGN-F 7.4 Point description : GPS mark ARO 0 (Epoch 92) 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 : July 2000 Additional information : Survey by IGN-F 8. Meteorological Instrumentation 8.1 Humidity sensor Model : MUC13 + transmitter M-UTN3 Manufacturer : SPSI Accuracy : Notes : 8.2 Pressure sensor Model : M-PaTN.8 Manufacturer : SPSI Accuracy : Height : m above the current DORIS ref. point (DJIB) Notes : 8.3 Temperature sensor Model : Constructed for DORIS beacons Manufacturer : SPSI Accuracy : 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