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<Product_Context xmlns="http://pds.nasa.gov/pds4/pds/v1"
    xmlns:pds ="http://pds.nasa.gov/pds4/pds/v1" 
    xmlns:ctli="http://pds.nasa.gov/pds4/ctli/v1"
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    xsi:schemaLocation=
    "http://pds.nasa.gov/pds4/pds/v1  https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1D00.xsd">
    
    <Identification_Area>
        <logical_identifier>urn:nasa:pds:context:telescope:madrid.dss63_70m</logical_identifier>
        <version_id>1.0</version_id>
        <title>DSS-63 70-m Radio Telescope</title>
        <information_model_version>1.13.0.0</information_model_version>
        <product_class>Product_Context</product_class>
        
        <Modification_History>
            <Modification_Detail>
                <modification_date>2020-07-19</modification_date>
                <version_id>1.0</version_id>
                <description>
                    Original context file for the DSS-63 antenna near Madrid, Spain, when its
                    aperture was 70 meters (late 1980s to present).
                </description>
            </Modification_Detail>
        </Modification_History>
    </Identification_Area>
    
    <Reference_List>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:radiosci.documentation:dsn.810-005</lid_reference>
            <reference_type>instrument_to_document</reference_type>
            <comment>
                This reference is to a PDS collection containing several versions of the NASA Deep 
                Space Network (DSN) Telecommunications Link Design Handbook (Document 810-005).
                The Handbook is maintained in a modular format to provide interface 
                design data to flight projects using the DSN.  Modules are updated as appropriate.
                Each member product in the PDS collection is the set of modules as they applied
                at that point in time.  Modules include:
                001 Handbook Introduction
                101 70-m Subnet Telecommunications Interfaces
                102 26-m Subnet Telecommunications Interfaces (omitted in 2009 and later versions)
                103 34-m HEF Subnet Telecommunications Interfaces
                104 34-m BWG Antennas Telecommunications Interfaces
                105 Atmospheric and Environmental Effects
                106 Solar Corona and Solar Wind Effects
                107 Radio Source Catalog
                201 Frequency and Channel Assignments
                202 34-m and 70-m Doppler
                203 Sequential Ranging
                205 Command Service
                206 Telemetry General Information
                207 34-m and 70-m Telemetry Reception
                208 Telemetry Data Decoding
                209 Open-Loop Radio Science
                210 Delta Differrential One-way Ranging
                211 Wideband Very Long Baseline Interferometry
                214 Pseudonoise and Regenerative Ranging
                301 Coverage and Geometry
                302 Antenna Positioning
                303 Media Calibration
                304 Frequency and Timing
                305 Test Support
                901 Handbook Glossary
            </comment>
        </Internal_Reference>
        
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:facility:observatory.dsn</lid_reference>
            <reference_type>telescope_to_facility</reference_type>
            <comment>
                This context product provides more information on the NASA Deep Space Network as a whole.
            </comment>
        </Internal_Reference>
        
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:facility:observatory.madrid</lid_reference>
            <reference_type>telescope_to_facility</reference_type>
            <comment>
                This context product provides more information on the Madrid Deep Space Communications Complex.
            </comment>
        </Internal_Reference>
        
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:telescope:madrid.dss63_64m</lid_reference>
            <reference_type>context_to_associate</reference_type>
            <comment>
                This context product provides more information on DSS-63 when its aperture
                was 64 meters (1974 to the late 1980s).
            </comment>
        </Internal_Reference>
        
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:instrument:dsn.rss</lid_reference>
            <reference_type>telescope_to_instrument</reference_type>
            <comment>
                This context product provides more information on the commanding, radio tracking, and
                radio science instrumentation at the telescope.
            </comment>
        </Internal_Reference>
        
        <External_Reference>
            <reference_text>https://www.mdscc.nasa.gov/index.php/en/history/</reference_text>
            <description>
                An overview of the Madrid Deep Space Communications Complex with photographs.
                Pull down the Antennas menu and select "DSS 63" for information about this antenna.
            </description>
        </External_Reference>
        
    </Reference_List>
    
    <Telescope>
        <aperture unit='m'>70</aperture>
        <telescope_longitude unit='deg'>355.751991</telescope_longitude>
        <telescope_latitude unit='deg'>40.431210</telescope_latitude>
        <telescope_altitude unit='m'>864.816</telescope_altitude>
        <coordinate_source>WGS 84 Ellipsoid</coordinate_source>
        <description>
           This fully steerable telescope is a parabolic reflector radio antenna that is part of
           the NASA Deep Space Network.  It was first operational in 1974 with a 64-m aperture. The
           aperture was extended to 70-m in the mid-1980s to support the Voyager 2 encounter with
           Neptune. The 70-m antenna can receive at frequencies between about 1.6 and 32, and it
           can transmit up to 20 kW at 2.1 and 7.4 GHz, though the former is limited to emergency 
           use by agreement with the Spanish gvernment. Antenna coordinates were converted from 
           Table 5 in module 301 (revision L) of the DSN Telecommunications Link Design Handbook 
           (DSN document 810-005).
           
           The Madrid Deep Space Communications Complex (MDSCC) is located about 65 km west of Madrid,
           near the town of Robledo de Chevala, Spain.  Under a 1964 agreement between the governments
           of Spain and the United States, the National Institute for Aerospace Technology (INTA) 
           managed the 70-m antenna during its early years. The creation, in 1992, of the state-owned 
           Aerospace Engineering and Services, SA (INSA, S.A.), under INTA, allowed the concentration 
           of these responsibilities in the new company. INSA has since disappeared and Ingeniería de 
           Sistemas para la Defensa de España has managed MDSCC since December 2012.
        </description>
    </Telescope>
    
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