CHATHAM ISLAND DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 26/07/2007 Report type : UPDATE 1. Site location information Site name : CHATHAM ISLAND Site DOMES number : 50207 Host agency : MetService City : Waitangi State or province : Chatham Islands Country : NEW ZEALAND Tectonic plate : Pacific Geological information : Geographical coordinates (ITRF) : North Latitude : -43 deg 57' 22'' East Longitude : -176 deg 33' 59'' Ellipsoid height : 61 m Approximate altitude : 50 m 2. DORIS antenna and reference point information 2.1 Four character ID : CHAB Antenna model : Starec 52291 type Antenna serial number : 53 IERS DOMES number : 50207S001 CNES/IGN number : 502072 CTDP number : 86 Date installed (dd/mm/yy): 28/02/1999 Date removed (dd/mm/yy) : 27/11/2001 Antenna support type : Guyed 2 metre tower Installed on : Concrete pad Height above ground mark : 2.430 m Ground mark type : Domed brass mark 12 mm diameter Ground mark DOMES number : 50207M002 Notes : 2.2 Four character ID : CHAB Antenna model : Starec 52291 type Antenna serial number : 53 IERS DOMES number : 50207S001 CNES/IGN number : 502072 CTDP number : 86 Date installed (dd/mm/yy): 29/11/2001 Date removed (dd/mm/yy) : 09/01/2007 Antenna support type : 32 cm sided, 2 m high tower Installed on : Concrete pad Height above ground mark : 2.431 m Ground mark type : Domed brass mark 12 mm diameter Ground mark DOMES number : 50207M002 Notes : Support change, same location of the reference : point within 3 mm. Upon removal, 2 GHz PC was : 4 mm east, 2 mm south of ground mark 2.3 Four character ID : CHAB Antenna model : Starec 52291 type Antenna serial number : 132 IERS DOMES number : 50207S001 CNES/IGN number : 502072 CTDP number : 86 Date installed (dd/mm/yy): 09/01/2007 Date removed (dd/mm/yy) : Antenna support type : 32 cm sided, 2 m high tower Installed on : Concrete pad Height above ground mark : 2.430 m Ground mark type : Dome1 brass mark 12 mm diameter Ground mark DOMES number : 50207M002 Notes : Antenna change. : 2 GHz PC is 2 mm east, 1 mm north of ground mark 3. DORIS beacons information 3.1 Beacon serial number : 86 33 055 Beacon model : 1.0 USO serial number : 1.398 4 Char. ID of the REF point : CHAB Date installed (dd/mm/yy) : 27/02/1999 Date removed (dd/mm/yy) : 23/12/1999 3.2 Beacon serial number : 86 33 031 Beacon model : 1.0 USO serial number : 1.459 4 Char. ID of the REF point : CHAB Date installed (dd/mm/yy) : 23/12/1999 Date removed (dd/mm/yy) : 30/03/2000 3.3 Beacon serial number : 86 33 025 Beacon model : 1.0 USO serial number : 1.248 4 Char. ID of the REF point : CHAB Date installed (dd/mm/yy) : 31/03/2000 Date removed (dd/mm/yy) : 31/10/2000 3.4 Beacon serial number : 86 33 027 Beacon model : 1.0 USO serial number : 4.1671 4 Char. ID of the REF point : CHAB Date installed (dd/mm/yy) : 31/10/2000 Date removed (dd/mm/yy) : 01/06/2001 3.5 Beacon serial number : 86 33 035 Beacon model : 1.0 USO serial number : 3.210 4 Char. ID of the REF point : CHAB Date installed (dd/mm/yy) : 06/07/2001 Date removed (dd/mm/yy) : 30/04/2005 3.6 Beacon serial number : 28 19 054 Beacon model : 3.0 USO serial number : 3.332 4 Char. ID of the REF point : CHAB Date installed (dd/mm/yy) : 01/05/2005 Date removed (dd/mm/yy) : 4. ITRF coordinates and velocities of the current DORIS ref. point (CHAB) Solution : ITRF2000 Epoch : 1997.0 X = -4590646.223 m Y = -275436.686 m Z = -4404628.840 m Sig X = 0.004 m Sig Y = 0.003 m Sig Z = 0.004 m VX = -0.0263 m/y VY = 0.0399 m/y VZ = 0.0212 m/y Sig VX = 0.0007 m/y Sig VY = 0.0004 m/y Sig VZ = 0.0007 m/y 5. IERS co-location information 5.1 Instrument type : GPS Status : Permanent DOMES number of the instrument ref. point : 50207M001 Notes : 6. Tide gauge co-location information 6.1 Name : Chatham Island Location : Waitangi GLOSS number : 128 Distance : 1.2 km Notes : Tie measured 03/1999 7. Local site ties 7.1 Point description : Mark under the DORIS antenna DOMES number : 50207M002 Differential components from the current DORIS ref. point (CHAB) to the above point (in the ITRS) : dX (m) : 1.746 dY (m) : 0.105 dZ (m) : 1.687 Accuracy (m) : 0.001 Date measured : Feb. 1999 Additional information : Survey by IGN-F 7.2 Point description : IGS monument CHAT DOMES number : 50207M001 Differential components from the current DORIS ref. point (CHAB) to the above point (in the ITRS) : dX (m) : -24.690 dY (m) : -46.309 dZ (m) : 32.064 Accuracy (m) : 0.002 Date measured : Feb. 1999 & Nov. 2001 Additional information : Survey by IGN-F (1999) and IGNS-NZ (2001) 7.3 Point description : Waitangi wharf : mark near the tide gauge DOMES number : Differential components from the current DORIS ref. point (CHAB) to the above point (in the ITRS) : dX (m) : -726.123 dY (m) : -536.667 dZ (m) : 853.370 Accuracy (m) : 0.002 Date measured : Feb. 1999 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 mb Height : 0.85 m below the current DORIS ref. point (CHAB) 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 (DCT/PO/AL) : 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