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<Product_Collection xmlns="http://pds.nasa.gov/pds4/pds/v1"
  xmlns:particle="http://pds.nasa.gov/pds4/particle/v2" 
  xmlns:msn="http://pds.nasa.gov/pds4/msn/v1"
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  ">  
  <Identification_Area>
    <logical_identifier>urn:nasa:pds:voyager-pws-vlism-density:data</logical_identifier>
    <version_id>2.0</version_id>
    <title>Voyager PWS VLISM Density Data Collection</title>
    <information_model_version>1.26.0.0</information_model_version>
    <product_class>Product_Collection</product_class>
    <Citation_Information>
      <publication_year>2026</publication_year>
      <description>
        This collection contains Voyager 1 and Voyager 2 electron density data in the Very
        Local Interstellar Medium (VLISM) produced from PWS characteristic plasma wave frequencies.
      </description>
      <List_Author>
        <Person>
          <given_name>William S.</given_name>
          <family_name>Kurth</family_name>
          <person_orcid>0000-0002-5471-6202</person_orcid>
          <Affiliation>
            <organization_name>University of Iowa</organization_name>
            <organization_rorid>https://ror.org/036jqmy94</organization_rorid>
          </Affiliation>
        </Person>
        <Person>
          <given_name>Larry</given_name>
          <family_name>Granroth</family_name>
          <person_orcid>0000-0001-6645-7722</person_orcid>
          <Affiliation>
            <organization_name>University of Iowa</organization_name>
            <organization_rorid>https://ror.org/036jqmy94</organization_rorid>
          </Affiliation>
        </Person>
        <Person>
          <given_name>Jeremy</given_name>
          <family_name>Faden</family_name>
          <person_orcid>0000-0003-2397-488X</person_orcid>
          <Affiliation>
            <organization_name>University of Iowa</organization_name>
            <organization_rorid>https://ror.org/036jqmy94</organization_rorid>
          </Affiliation>
          <Affiliation>
            <organization_name>Cottage Systems (United States)</organization_name>
            <organization_rorid>https://ror.org/01sqsqt89</organization_rorid>
          </Affiliation>
        </Person>
      </List_Author>
    </Citation_Information>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2026-08-14</modification_date>
        <version_id>1.0</version_id>
        <description>Voyager 1 and 2 Data Release 1</description>
      </Modification_Detail>
      <Modification_Detail>
        <modification_date>2026-09-09</modification_date>
        <version_id>2.0</version_id>
        <description>Voyager 1 VLISM Release 2, which includes corrections to Lon and Lat.</description>
      </Modification_Detail>
    </Modification_History>  
  </Identification_Area>
  <Context_Area>
    <Time_Coordinates>
      <start_date_time>2012-10-22T21:44:19.795Z</start_date_time>
      <stop_date_time>2025-04-14T17:27:35.917Z</stop_date_time>
    </Time_Coordinates>
    <Primary_Result_Summary>
      <purpose>Science</purpose>
      <processing_level>Derived</processing_level>
      <Science_Facets>
        <wavelength_range>Radio</wavelength_range>
        <domain>Magnetosphere</domain>
        <discipline_name>Particles</discipline_name>
        <facet1>Electrons</facet1>
        <facet2>Plasma</facet2>
      </Science_Facets>
    </Primary_Result_Summary>
    <Investigation_Area>
      <name>Voyager</name>
      <type>Mission</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:investigation:mission.voyager</lid_reference>
        <reference_type>collection_to_investigation</reference_type>
      </Internal_Reference>
    </Investigation_Area>
    <Observing_System>
      <Observing_System_Component>
        <name>Voyager 1</name>
        <type>Host</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.vg1</lid_reference>
          <reference_type>is_instrument_host</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Voyager 2</name>
        <type>Host</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.vg2</lid_reference>
          <reference_type>is_instrument_host</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Plasma Wave Science</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:vg1.pws</lid_reference>
          <reference_type>is_instrument</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Plasma Wave Science</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:vg2.pws</lid_reference>
          <reference_type>is_instrument</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
    </Observing_System>
    <Target_Identification>
      <name>Interstellar Medium</name>
      <type>Plasma Stream</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:target:plasma_stream.interstellar_medium</lid_reference>
        <reference_type>collection_to_target</reference_type>
      </Internal_Reference>
    </Target_Identification>
    <Target_Identification>
      <name>Solar System</name>
      <type>Planetary System</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:target:planetary_system.solar_system</lid_reference>
        <reference_type>collection_to_target</reference_type>
      </Internal_Reference>
    </Target_Identification>
    <Discipline_Area>
      <msn:Mission_Information>
        <msn:mission_phase_name>Interstellar Mission</msn:mission_phase_name>
      </msn:Mission_Information>
      <particle:Particle_Observation>
        <particle:Particle_Parameter>
          <particle:particle_type>Electrons</particle:particle_type>
          <particle:particle_measurement_type>Density</particle:particle_measurement_type>
        </particle:Particle_Parameter>
      </particle:Particle_Observation>
    </Discipline_Area>
  </Context_Area>
  <Reference_List>
    <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:resource:resource.voyager-pws-vlism-density_colxn_data_online</lid_reference>
            <reference_type>has_resource</reference_type>
        </Internal_Reference>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:resource:resource.voyager-pws-vlism-density_online</lid_reference>
            <reference_type>has_resource</reference_type>
        </Internal_Reference>
        <Internal_Reference>
      <lidvid_reference>urn:nasa:pds:voyager-pws-vlism-density:browse:voyager1::1.0</lidvid_reference>
      <reference_type>collection_to_browse</reference_type>
      <comment>
        Electron number densities are plotted here. Newer browse plots may
        also exist in which case this reference is out dated but will not be
        updated.
      </comment>
    </Internal_Reference>
    <Internal_Reference>
      <lidvid_reference>urn:nasa:pds:voyager-pws-vlism-density:browse:voyager2::1.0</lidvid_reference>
      <reference_type>collection_to_browse</reference_type>
      <comment>
        Electron number densities are plotted here. Newer browse plots may
        also exist in which case this reference is out dated but will not be
        updated.
      </comment>
    </Internal_Reference>
  </Reference_List>
  <Collection>
    <collection_type>Data</collection_type>
    <description>This collection contains the two data files (one for Voyager 1 and one for Voyager
      2) in CSV format.</description>
  </Collection>
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      <file_name>collection_data.csv</file_name>
      <creation_date_time>2026-08-13T17:54:44</creation_date_time>
      <file_size unit="byte">120</file_size>
      <md5_checksum>2addfb56a5d2f1fd3fffb58bf870dc4c</md5_checksum>
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      <parsing_standard_id>PDS DSV 1</parsing_standard_id>
      <records>2</records>
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        <groups>0</groups>
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        <Field_Delimited>
          <name>LIDVID_LID</name>
          <field_number>2</field_number>
          <data_type>ASCII_LIDVID_LID</data_type>
          <maximum_field_length unit="byte">255</maximum_field_length>
        </Field_Delimited>
      </Record_Delimited>
      <reference_type>inventory_has_member_product</reference_type>
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</Product_Collection>
