ARLIT 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 : ARLIT Site DOMES number : 33710 Host agency : SOMAIR Arlit City : Arlit State or province : Country : NIGER Tectonic plate : AFRC Geological information : Geographical coordinates (ITRF) : North Latitude : 18 deg 46' 56'' East Longitude : 7 deg 21' 31'' Ellipsoid height : 455 m Approximate altitude : 430 m 2. DORIS antenna and reference point information 2.1 Four character ID : ARLA Antenna model : Alcatel Antenna serial number : 67 IERS DOMES number : 33710S001 CNES/IGN number : 337101 CTDP number : 35 Date installed (dd/mm/yy): 05/12/1987 Date removed (dd/mm/yy) : 08/12/1992 Antenna support type : Guyed 2 metre tower Installed on : Concrete beam of a terrace roof (one storied : buiding). Height above ground mark : 2.198 m Ground mark type : Brass mark 20 mm diam. Ground mark DOMES number : 33710 Notes : 2.2 Four character ID : ARMA Antenna model : Alcatel Antenna serial number : 67 IERS DOMES number : 33710S002 CNES/IGN number : 337102 CTDP number : 40 Date installed (dd/mm/yy): 11/12/1992 Date removed (dd/mm/yy) : Antenna support type : Guyed 2 metre tower Installed on : Top of a load-bearing wall of a one storied : building with terrace roof. Height above ground mark : 2.203 m Ground mark type : Brass mark 20 mm diam. Ground mark DOMES number : 33710M002 Notes : 3. DORIS beacons information 3.1 Beacon serial number : 86 33 035 Beacon model : 1.0 USO serial number : 1.455 4 Char. ID of the REF point : ARLA Date installed (dd/mm/yy) : 01/12/1987 Date removed (dd/mm/yy) : 09/12/1992 3.2 Beacon serial number : 86 33 035 Beacon model : 1.0 USO serial number : 1.455 4 Char. ID of the REF point : ARMA Date installed (dd/mm/yy) : 12/12/1992 Date removed (dd/mm/yy) : 01/02/1996 3.3 Beacon serial number : 86 27 009 Beacon model : 1.0 USO serial number : 1.415 4 Char. ID of the REF point : ARMA Date installed (dd/mm/yy) : 19/04/1996 Date removed (dd/mm/yy) : 12/03/1997 3.4 Beacon serial number : 86 33 029 Beacon model : 1.0 USO serial number : 2.692 4 Char. ID of the REF point : ARMA Date installed (dd/mm/yy) : 07/05/1998 Date removed (dd/mm/yy) : 26/05/1999 3.5 Beacon serial number : 86 33 034 Beacon model : 1.0 USO serial number : 1.369 4 Char. ID of the REF point : ARMA Date installed (dd/mm/yy) : 27/05/1999 Date removed (dd/mm/yy) : 31/07/1999 4. ITRF coordinates and velocities of the current DORIS ref. point (ARMA) Solution : ITRF2000 Epoch : 1997.0 X = 5991269.363 m Y = 773728.558 m Z = 2040688.517 m Sig X = 0.017 m Sig Y = 0.025 m Sig Z = 0.013 m VX = -0.0137 m/y VY = 0.0230 m/y VZ = 0.0176 m/y Sig VX = 0.0086 m/y Sig VY = 0.0125 m/y Sig VZ = 0.0067 m/y 5. IERS colocation information 6. Tide Gauge colocation information 7. Local site ties 7.1 Point description : Mark under the DORIS antenna DOMES number : 33710M002 Differential components from the current DORIS ref. point (ARMA) to the above point (in the ITRS) : dX (m) : -2.068 dY (m) : -0.267 dZ (m) : -0.709 Accuracy (m) : 0.001 Date measured : Additional information : 7.2 Point description : Brass Mark in concrete block (Epoch 92) DOMES number : 33710M001 Differential components from the current DORIS ref. point (ARMA) to the above point (in the ITRS) : dX (m) : 22.206 dY (m) : -14.873 dZ (m) : -79.839 Accuracy (m) : 0.002 Date measured : Additional information : 7.3 Point description : DORIS Alcatel antenna reference point (ARLA) DOMES number : 33710S001 Differential components from the current DORIS ref. point (ARMA) to the above point (in the ITRS) : dX (m) : 1362.690 dY (m) : 2163.732 dZ (m) : -4825.937 Accuracy (m) : 0.010 Date measured : Additional information : 8. Meteorological Instrumentation 8.1 Humidity sensor Model : MUC.1 + transmitter M-UTN3 Manufacturer : SPSI Accuracy : Notes : 8.2 Pressure sensor Model : M-PaTN.8 Manufacturer : SPSI Accuracy : Height : -0.80 m above the current DORIS ref. point (ARMA) Notes : 8.3 Temperature sensor Model : Constructed for DORIS beacons Manufacturer : CEIS-TM 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