ULAANBAATAR DORIS site description form


0. Form

    Prepared by   : SIMB (DORIS installation and maintenance department)
    Date prepared : 15/01/2025
    Report type   : NEW


1. Site location information

    Site name              : ULAANBAATAR
    Site DOMES number      : 24201
    Host agency            : Institute of Astronomy and Geophysics
    City                   : Ulaanbaatar
    State or province      : 
    Country                : MONGOLIA
    Tectonic plate         : Eurasian
    Geological information : 

    Geographical coordinates (ITRF) : 
        North Latitude       :    47 deg 51' 54''
        East Longitude       :   107 deg  3'  8''
        Ellipsoid height     :  1579 m
        Approximate altitude :  1615 m


2. DORIS antenna and reference point information

2.1
    Four character ID        : ULAC
    Antenna model            : Starec C type
    Antenna serial number    : 222
    IERS DOMES number        : 24201S001
    CNES/IGN number          : 24201
    DORIS SSALTO number      : 350
    Date installed (dd/mm/yy): 05/09/2024
    Date removed (dd/mm/yy)  : 
    Antenna support type     : 2 m high very rigid metal tower
    Installed on             : 2m high concrete pillar
    Height above ground mark : 2.423  m
    Ground mark type         : 
    Ground mark DOMES number : 24201M002
    Notes                    : 


3. DORIS beacons information

3.1
    Beacon serial number        : 20194036I
    Beacon model                : 4.0
    USO serial number           : 4.P0032
    4 Char. ID of the REF point : ULAC
    Date installed (dd/mm/yy)   : 05/09/2024
    Date removed (dd/mm/yy)     : 


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

    Solution         : dpod2020_030
    Epoch            : 2000.0 

    X = -1257400.889 m    Y = 4099413.710 m    Z = 4707992.463 m
    Sig X = 0.001 m    Sig Y = 0.001 m    Sig Z = 0.001 m

    VX = -0.02913 m/y    VY = -0.00153 m/y    VZ = -0.00514 m/y
    Sig VX = 0.000062 m/y    Sig VY = 0.000104 m/y    Sig VZ = 0.000116 m/y


5. IERS colocation information

5.1
    Instrument type       : GNSS
    Status                : Permanent
    DOMES number of the
    instrument ref. point : 24201M001
    Notes                 : IGS station "ULAB"

6. Tide Gauge colocation information


7. Local site ties

7.1
    Point description      : IGS station (ULAB)
    DOMES number           : 24201M001
    Differential components from the current DORIS ref. point (ULAC)
    to the above point (in the ITRS) :
    dX (m)                 : -7.514
    dY (m)                 : -9.355
    dZ (m)                 : 0.198
    Accuracy (m)           : 0.001
    Date measured          : 02/09/2024
    Additional information : Survey by IGN-F

7.2
    Point description      : Mark under the DORIS antenna
    DOMES number           : 24201M002
    Differential components from the DORIS ref. point (ULAC)
    to the above point (in the ITRS) :
    dX (m)                 : 0.475
    dY (m)                 : -1.554
    dZ (m)                 : -1.797
    Accuracy (m)           : 0.001
    Date measured          : 02/09/2024
    Additional information : Survey by IGN-F


8. Meteorological Instrumentation

8.1 Humidity sensor
    Model        : AM2315
    Manufacturer : AOSONG
    Accuracy     : +/- 2 percents
    Notes        : 

8.2 Pressure sensor
    Model        : BMP280
    Manufacturer : Bosch
    Accuracy     : +/- 0.12 hPa, equiv. to +/- 1 m
    Height       :  m below the current DORIS ref. point (ULAC)
    Notes        : Long term stability +/- 1 hPa per year

8.3 Temperature sensor
    Model        : AM2315
    Manufacturer : AOSONG
    Accuracy     : +/- 0.1 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
    Fax             :  
    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