<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href="https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1D00.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>

<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"
    xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
    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:goldstone.dss14_70m</logical_identifier>
        <version_id>1.0</version_id>
        <title>DSS-14 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>2020-07-30</modification_date>
                <version_id>1.0</version_id>
                <description>
                    Upgraded for use with a larger set of DSN context products.  This file describes
                    the DSS-14 70-m antenna at Goldstone which became operational in 1988.
                    Initial version exported from OLAF.
                </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.goldstone</lid_reference>
            <reference_type>telescope_to_facility</reference_type>
            <comment>
                This context product provides more information on the Goldstone Deep Space Communications Complex.
            </comment>
        </Internal_Reference>
        
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:telescope:goldstone.dss14_64m</lid_reference>
            <reference_type>context_to_associate</reference_type>
            <comment>
                This context product provides more information on DSS-14 when its aperture was 64 m.
            </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>
        
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:instrument:goldstone.dss14_70m.recv_x</lid_reference>
            <reference_type>telescope_to_instrument</reference_type>
            <comment>
                This context product provides more information on the Goldstone Solar System Radar
                X-band receiver as used with the 70-m antenna.
            </comment>
        </Internal_Reference>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:instrument:goldstone.dss14_70m.trans_x</lid_reference>
            <reference_type>telescope_to_instrument</reference_type>
            <comment>
                This context product provides more information on the Goldstone Solar System Radar,
                X-band transmitter as used with the 70-m antenna.
            </comment>
        </Internal_Reference>
        
        <External_Reference>
            <reference_text>https://www.gdscc.nasa.gov/?page_id=40</reference_text>
            <description>
                An overview of the Goldstone Deep Space Communication Complex with photographs.
                Pull down the menu tab at the bottom of the page for more information on DSS-14.
            </description>
        </External_Reference>
        
    </Reference_List>
    
    <Telescope>
        <aperture unit='m'>70</aperture>
        <telescope_longitude unit='deg'>243.110462</telescope_longitude>
        <telescope_latitude unit='deg'>35.425901</telescope_latitude>
        <telescope_altitude unit='m'>1001.390</telescope_altitude>
        <coordinate_source>WGS 84 Ellipsoid</coordinate_source>
        <description>
           This fully steerable telescope is a parabolic radio/radar antenna that is part of the NASA
           Deep Space Network (DSN). DSS-14 was first operational in 1964 with a 64-m aperture, supporting
           the Mariner 4 flyby of Mars; as a result, it was subsequently known as "Mars Station".
           Its aperture was extended to 70-m in 1988 to support the Voyager 2 encounter with
           Neptune.  The antenna can receive at frequencies between about 1.6 and 8.6 GHz in left-circular
           polarization (LCP); over 2.0-8.6 GHz it can receive simultaneously in both LCP and right-circular
           polarization (RCP). It can transmit up to 20 kW at selected frequencies in the 2-8 GHz range.  
           DSS-14 is used occasionally as part of the Goldstone Solar System Radar, which has more powerful
           transmitters. Antenna coordinates were converted from Table 5 in module 301 (revision L) of 
           the DSN Telecommunications Link Design Handbook (DSN document 810-005).
        </description>
    </Telescope>
    
</Product_Context>
