<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?xml-model href="https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1J00.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>

<Product_Observational 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_1J00.xsd">
  <Identification_Area>
    <logical_identifier>urn:nasa:pds:clementine1_gravity_and_topography:gravity_data:bouggrd</logical_identifier>
    <version_id>1.0</version_id>
    <title>Clementine 1: 2-D Grid of Bouguer Anomalies (One Degree)</title>
    <information_model_version>1.19.0.0</information_model_version>
    <product_class>Product_Observational</product_class>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2023-01-24</modification_date>
        <version_id>1.0</version_id>
        <description>PDS4 migrated product.</description>
      </Modification_Detail>
    </Modification_History>
  </Identification_Area>
  <Observation_Area>
    <Time_Coordinates>
      <start_date_time xsi:nil="true" nilReason="inapplicable"></start_date_time>
      <stop_date_time xsi:nil="true" nilReason="inapplicable"></stop_date_time>
    </Time_Coordinates>
    <Investigation_Area>
      <name>Deep Space Program Science Experiment</name>
      <type>Mission</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:investigation:mission.deep_space_program_science_experiment</lid_reference>
        <reference_type>data_to_investigation</reference_type>
        <comment>Clementine 1</comment>
      </Internal_Reference>
    </Investigation_Area>
    <Observing_System>
      <Observing_System_Component>
        <name>Clementine 1</name>
        <type>Host</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.clem1</lid_reference>
          <reference_type>is_instrument_host</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Radio Science Subsystem</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:clem1.rss</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>data_to_target</reference_type>
      </Internal_Reference>
    </Target_Identification>
  </Observation_Area>
  <Reference_List>
    <Internal_Reference>
      <lid_reference>urn:nasa:pds:clementine1_gravity_and_topography:gravity_map:bouggrd_img</lid_reference>
      <reference_type>data_to_associate</reference_type>
    </Internal_Reference>
  </Reference_List>

  <File_Area_Observational>
    <File>
      <file_name>bouggrd.dat</file_name>
      <records>6480</records>
      <comment>
        This file contains a digital,
        1 X 1 degree resolution grid of Bouguer gravity anomalies of the
        Moon.  It is a 360 x 180 grid from 89.5 to -89.5 degrees
        latitude, and 0.5 to 359.5 degrees longitude.  The Bouguer
        anomalies are derived from the 70th-degree and -order spherical
        harmonic gravity model, GLGM-2.  The observation is Bouguer
        gravity in milligals.  The reduction density was 2800 kg/m3 and a
        correction for the added density of the largest mare on the
        nearside (3300 kg/m3) has been applied, using thicknesses given
        in Solomon and Head (Reviews of Geophysics, v. 18, p. 107-141,
        1980).
        
        This is a 2-D grid of the Bouguer gravity
        anomalies of the Moon in milligals (1 milligal = 0.01 mm/s/s).  
        The file contains 180 blocks of 36 records each, with each record 
        containing 10 Bouguer anomaly values plus an ASCII carriage-
        return line-feed pair as a delimiter.  The first block contains 
        values at -89.5 latitude; the first value in the first record is 
        the Bouguer anomaly at (-89.5, 0.5).
      </comment>
    </File>
    
    <Stream_Text>
      <offset unit="byte">0</offset>
      <parsing_standard_id>7-Bit ASCII Text</parsing_standard_id>
      <description>
        This is a 2-D grid of the Bouguer gravity anomalies of the Moon 
        in milligals.
      </description>
      <record_delimiter>Carriage-Return Line-Feed</record_delimiter>
    </Stream_Text>
  </File_Area_Observational>

  <File_Area_Observational_Supplemental>
    <File>
      <file_name>bouggrd.lbl</file_name>
    </File>
    <Stream_Text>
      <offset unit="byte">0</offset>
      <parsing_standard_id>PDS3</parsing_standard_id>
      <description>Original PDS3 label</description>
      <record_delimiter>Carriage-Return Line-Feed</record_delimiter>
    </Stream_Text>
  </File_Area_Observational_Supplemental>
</Product_Observational>
