SOCORRO DORIS site description form 0. Form Prepared by : SIMB (DORIS installation and maintenance department) Date prepared : 05/10/2023 Report type : UPDATE 1. Site location information Site name : SOCORRO Site DOMES number : 40503 Host agency : INEGI & Armada de Mexico City : Isla Socorro State or province : Colima Country : MEXICO Tectonic plate : PCFC Geological information : Geographical coordinates (ITRF) : North Latitude : 18 deg 43' 41'' East Longitude : -110 deg 57' 16'' Ellipsoid height : 13 m Approximate altitude : 47 m 2. DORIS antenna and reference point information 2.1 Four character ID : SODA Antenna model : Acatel Antenna serial number : 70 IERS DOMES number : 40503S003 CNES/IGN number : 405032 DORIS SSALTO number : 21 Date installed (dd/mm/yy): 08/02/1991 Date removed (dd/mm/yy) : 18/05/1998 Antenna support type : Guyed 2 metre tower Installed on : Terrace roof of a 1 storied building Height above ground mark : Ground mark type : Ground mark DOMES number : Notes : From 09/06/89 to 15/10/90 ID=SOCA SSALTO n°=40 on Board n°=40, DOMES=40503S002, beacon=8633040 WARNING from 11/12/92 to 31/04/99 Arlit (ARMA) SSALTO n° & on board n°= 40. From 08/02/91 to 20/12/97 ID = SODA SSALTO n°= 21 on board n°= 44 2.2 Four character ID : SODB Antenna model : Starec 52290 type Antenna serial number : 43 IERS DOMES number : 40503S004 CNES/IGN number : 405033 DORIS SSALTO number : 79 Date installed (dd/mm/yy): 20/05/1998 Date removed (dd/mm/yy) : 19/04/2014 Antenna support type : Guyed 3 metre tower Installed on : Terrace roof of a 1 storied building Height above ground mark : 3.462 m Ground mark type : Brass mark 12 mm diameter Ground mark DOMES number : 40503M002 Notes : 2.3 Four character ID : SOEB Antenna model : Starec 52290 type Antenna serial number : 142 IERS DOMES number : 40503S005 CNES/IGN number : 405034 DORIS SSALTO number : Date installed (dd/mm/yy): 25/04/2014 Date removed (dd/mm/yy) : 04/03/2017 Antenna support type : 40 cm high stainless steel structure Installed on : 2 m high concrete pillar embedded in volcanic rock Height above ground mark : 0.837 m Ground mark type : Mark under the DORIS antenna Ground mark DOMES number : 40503M006 Notes : 2.4 Four character ID : SOFC Antenna model : Starec C type Antenna serial number : 164 IERS DOMES number : 40503S006 CNES/IGN number : 405035 DORIS SSALTO number : 1294 Date installed (dd/mm/yy): 04/03/2017 Date removed (dd/mm/yy) : Antenna support type : 40 cm high stainless steel structure Installed on : 2 m high concrete pillar embedded in volcanic rock Height above ground mark : 0.837 m Ground mark type : Mark under the DORIS antenna Ground mark DOMES number : 40503M006 Notes : 3. DORIS beacons information 3.1 Beacon serial number : 8627021 Beacon model : 1.0 USO serial number : 1.357 4 Char. ID of the REF point : SODA Date installed (dd/mm/yy) : 18/02/1991 Date removed (dd/mm/yy) : 30/11/1991 3.2 Beacon serial number : 8633044 Beacon model : 1.0 USO serial number : 1.399 4 Char. ID of the REF point : SODA Date installed (dd/mm/yy) : 01/12/1991 Date removed (dd/mm/yy) : 01/07/1994 3.3 Beacon serial number : 8633034 Beacon model : 1.0 USO serial number : 1.369 4 Char. ID of the REF point : SODA Date installed (dd/mm/yy) : 25/07/1994 Date removed (dd/mm/yy) : 30/11/1997 3.4 Beacon serial number : 8633043 Beacon model : 1.0 USO serial number : 1.545 4 Char. ID of the REF point : SODB Date installed (dd/mm/yy) : 20/05/1998 Date removed (dd/mm/yy) : 12/10/2000 3.5 Beacon serial number : 8633044 Beacon model : 1.0 USO serial number : 4.86899 4 Char. ID of the REF point : SODB Date installed (dd/mm/yy) : 17/07/2001 Date removed (dd/mm/yy) : 26/05/2011 3.6 Beacon serial number : 2819053 Beacon model : 3.0 USO serial number : 3.388 4 Char. ID of the REF point : SOEB Date installed (dd/mm/yy) : 25/04/2014 Date removed (dd/mm/yy) : 04/03/2017 3.7 Beacon serial number : 3690076 Beacon model : 3.0 USO serial number : 3.534 4 Char. ID of the REF point : SOFC Date installed (dd/mm/yy) : 04/03/2017 Date removed (dd/mm/yy) : 4. ITRF coordinates and velocities of the current DORIS ref. point (SOFC) Solution : dpod2014_04 Epoch : 2000.0 X = -2160965.257 m Y = -5642912.788 m Z = 2034861.896 m Sig X = 0.001 m Sig Y = 0.001 m Sig Z = 0.001 m VX = -0.04978 m/y VY = 0.02883 m/y VZ = 0.02170 m/y Sig VX = m/y Sig VY = m/y Sig VZ = m/y 5. IERS colocation information 6. Tide Gauge colocation information 6.1 Name : Socorro Island Location : Socorro Island GLOSS number : 162 Distance : 0.6 km Notes : Tie measured 04/2014 7. Local site ties 7.1 Point description : Mark under the DORIS antenna DOMES number : 40503M006 Differential components from the current DORIS ref. point (SOFC) to the above point (in the ITRS) : dX (m) : 0.283 dY (m) : 0.740 dZ (m) : -0.269 Accuracy (m) : 0.001 Date measured : 24/04/2014 Additional information : Survey by IGN-F 7.2 Point description : DORIS starec antenna reference point (SOEB) DOMES number : 40503S005 Differential components from the current DORIS ref. point (SOFC) to the above point (in the ITRS) : dX (m) : 0.000 dY (m) : 0.000 dZ (m) : 0.000 Accuracy (m) : 0.001 Date measured : 04/03/2017 Additional information : Survey by INEGI 7.3 Point description : Mark NOAA B.N.3 (near the tide gauge) DOMES number : 40503M003 Differential components from the current DORIS ref. point (SOFC) to the above point (in the ITRS) : dX (m) : 425.317 dY (m) : -240.045 dZ (m) : -315.463 Accuracy (m) : 0.005 Date measured : 24/04/2014 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 : m above the current DORIS ref. point (SOFC) 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 : IGN Institut Geographique National Mailing address : Service de Geodesie et de Metrologie : 73 avenue de Paris : 94165 SAINT-MANDE Cedex FRANCE Telephone : + 33 1 43 98 83 63 E-mail : jerome (.) saunier (@) ign.fr Secondary contact: Name : Vincent GARCIA Agency : CNES Centre National d'Etudes Spatiales Mailing address : CNES (DNO/TSA/IS) : 18 Avenue Edouard Belin : 31401 TOULOUSE Cedex FRANCE Telephone : + 33 5 61 27 37 75 Fax : E-mail : vincent (.) garcia (@) cnes.fr