Network

   BETIO DORIS site description form

0. Form

   Prepared by       : SIMB (DORIS installation and maintenance department)
   Date prepared     : 9/12/2008
   Report type       : UPDATE

1. Site location information

   Site name               : BETIO
   Site DOMES number       : 50305
   Host agency             : Kiribati Meteorological Service
   City                    : Betio
   State or province       : Tarawa atoll
   Country                 : KIRIBATI
   Tectonic plate (PB2002) : Pacific
   Geological information  : 
                             
   Geographical coordinates (ITRF) : 
          North Latitude   :    1 deg 21' 17''
          East Longitude   :  172 deg 55' 23''
          Ellipsoid height :   37 m
   Approximate altitude    :    6 m

2. DORIS antenna and reference point information

2.1
   Four character ID        : BETB
   Antenna model            : Starec 52291 type
   Antenna serial number    : 121
   IERS DOMES number        : 50305S001
   CNES/IGN number          : 503051
   CTDP number              : 272
   Date installed (dd/mm/yy): 22/10/2006
   Date removed (dd/mm/yy)  : 
   Antenna support type     : 1.5 meter high, 40 cm sided concrete pillar
   Installed on             : pillar extends 2 m deep into the ground
   Height above ground mark : 0.648 m
   Ground mark type         : Domed brass mark 12 mm diameter
   Ground mark DOMES number : 50305M002
   Notes                    : 


3. DORIS beacons information

3.1
   Beacon serial number        : 28 19 004
   Beacon model                : 3.0
   USO serial number           : 3.260
   4 Char. ID of the REF point : BETB
   Date installed (dd/mm/yy)   : 22/10/2006
   Date removed (dd/mm/yy)     : 


4. ITRF coordinates and velocities of the current DORIS ref. point (BETB)

   Solution : DPOD2005
   Epoch    : 2000.0

   X = -6327823.292 m     Y = 785599.268 m     Z = 149786.304 m
   Sig X = 0.003 m        Sig Y = 0.002 m       Sig Z = 0.001 m

   VX = 0.0091 m/y        VY = 0.0672 m/y       VZ = 0.0303 m/y
   Sig VX =  m/y    Sig VY =  m/y   Sig VZ =  m/y

5. IERS co-location information

5.1
   Instrument type       : GPS
   Status                : Permanent
   DOMES number of the
   instrument ref. point : 50305M001
   Notes                 : KIRI GPS station (Geoscience Australia)

6. Tide gauge co-location information

6.1
   Name         : Tarawa
   Location     : Betio
   GLOSS number : 113
   Distance     : 1.6 km
   Notes        : 

7. Local site ties

7.1
   Point description      : KIRI GPS station (stainless steel spigot on pillar)
   DOMES number           : 50305M001

   Differential components from the current DORIS ref. point (BETB)
   to the above point (in the ITRS) :
                   dX (m) : 0.754
                   dY (m) : 4.561
                   dZ (m) : -17.353
   Accuracy (m)           : 0.002
   Date measured          : 10/2006
   Additional information : Survey by IGN-F

7.2
   Point description      : DORIS domed brass mark on concrete pillar
   DOMES number           : 50305M002

   Differential components from the current DORIS ref. point (BETB)
   to the above point (in the ITRS) :
                   dX (m) : 0.643
                   dY (m) : -0.080
                   dZ (m) : -0.015
   Accuracy (m)           : 0.001
   Date measured          : 10/2006
   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          : 0.3 m below the current DORIS ref. point (BETB)
   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/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