<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href="https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1I00.sch"  schematypens="http://purl.oclc.org/dsdl/schematron"?>

<Product_Collection xmlns="http://pds.nasa.gov/pds4/pds/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_1I00.xsd">

  <Identification_Area>
    <logical_identifier>urn:nasa:pds:grail_gravity_derived:data_rsdmap</logical_identifier>
    <version_id>1.0</version_id>
    <title>GRAIL Gravity Image Collection</title>
    <information_model_version>1.18.0.0</information_model_version>
    <product_class>Product_Collection</product_class>
    <Citation_Information>
      <author_list>Kahan, D.; Lemoine, F. G.; Konopliv, A. S.; Goossens, S.</author_list>
      <publication_year>2022</publication_year>
      <description>
        This collection contains a set of images representing the Lunar gravity field
        derived from data acquired from the Lunar Gravity Ranging System (LGRS) 
        on the two spacecraft comprising the 
        Gravity Recovery and Interior Laboratory (GRAIL) mission.
      </description>
    </Citation_Information>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2022-08-22</modification_date>
        <version_id>1.0</version_id>
        <description>Initial version</description>
      </Modification_Detail>
    </Modification_History>
  </Identification_Area>
  <Context_Area>
    <Time_Coordinates>
      <start_date_time>2011-09-10Z</start_date_time>
      <stop_date_time>2012-12-18Z</stop_date_time>
    </Time_Coordinates>
    <Primary_Result_Summary>
      <purpose>Science</purpose>
      <processing_level>Derived</processing_level>
      <Science_Facets>
        <domain>Interior</domain>
        <discipline_name>Geosciences</discipline_name>
      </Science_Facets>
    </Primary_Result_Summary>
    <Investigation_Area>
      <name>Gravity Recovery and Interior Laboratory</name>
      <type>Mission</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:investigation:mission.gravity_recovery_and_interior_laboratory</lid_reference>
        <reference_type>collection_to_investigation</reference_type>
      </Internal_Reference>
    </Investigation_Area>
    <Observing_System>
      <Observing_System_Component>
        <name>Gravity Recovery and Interior Laboratory A</name>
        <type>Host</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.grail-a</lid_reference>
          <reference_type>is_instrument_host</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Gravity Recovery and Interior Laboratory B</name>
        <type>Host</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.grail-b</lid_reference>
          <reference_type>is_instrument_host</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Lunar Gravity Ranging System A for GRAIL-A</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:grail-a.lgrs-a</lid_reference>
          <reference_type>is_instrument</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Lunar Gravity Ranging System B for GRAIL-B</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:grail-b.lgrs-b</lid_reference>
          <reference_type>is_instrument</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
    </Observing_System>        
    <Target_Identification>
      <name>Moon</name>
      <type>Satellite</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:target:satellite.earth.moon</lid_reference>
        <reference_type>collection_to_target</reference_type>
      </Internal_Reference>
    </Target_Identification>
  </Context_Area>
  <Reference_List>
    <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:resource:resource.grail_gravity_derived_online</lid_reference>
        <reference_type>has_resource</reference_type>
    </Internal_Reference>
  </Reference_List>
  <Collection>
    <collection_type>Data</collection_type>
  </Collection>
  <File_Area_Inventory>
    <File>
      <file_name>collection_data_rsdmap_inventory.csv</file_name>
    </File>
    <Inventory>
      <local_identifier>inventory</local_identifier>
      <offset unit="byte">0</offset>
      <parsing_standard_id>PDS DSV 1</parsing_standard_id>
      <records>35</records>  
      <record_delimiter>Carriage-Return Line-Feed</record_delimiter>
      <field_delimiter>Comma</field_delimiter>
      <Record_Delimited>
        <fields>2</fields>
        <groups>0</groups>
        <maximum_record_length unit="byte">256</maximum_record_length>
        <Field_Delimited>
          <name>Member Status</name>
          <field_number>1</field_number>
          <data_type>ASCII_String</data_type>
          <maximum_field_length unit="byte">1</maximum_field_length>
          <description>
             This columns specifies the Member Status of the files that comprise the collection.  
          </description>
        </Field_Delimited>
        <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>
          <description>
             This columns specifies the LIDVID of the files that comprise the collection.  
          </description>
        </Field_Delimited>
      </Record_Delimited>
      <reference_type>inventory_has_member_product</reference_type>
    </Inventory>
  </File_Area_Inventory>
</Product_Collection>
