<?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:fairerr1</logical_identifier>
    <version_id>1.0</version_id>
    <title>Clementine 1: 2-D Grid of Free-Air Gravity Anomaly Errors (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>2023-02-07</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:fairerr1_img</lid_reference>
      <reference_type>data_to_associate</reference_type>
    </Internal_Reference>
  </Reference_List>

  <File_Area_Observational>
    <File>
      <file_name>fairerr1.dat</file_name>
      <records>6480</records>
      <comment>
        This file contains a digital,
        1 X 1 degree resolution grid of the error in the free-air gravity
        accelerations of the Moon.  This error map was computed by
        projecting the full covariance of the GLGM-2 gravity solution
        onto the surface of the planet.  The error distribution
        correlates with the availability and resolution of the Doppler
        tracking data.  The errors are lowest in the equatorial regions
        of the near side (17 mGals) to as high as 45+ mGals on the high
        latitude regions of the far side.  It is a 360 x 180 grid from
        89.5 to -89.5 degrees latitude, and 0.5 to 359.5 degrees
        longitude.
        
        The file contains 180 blocks of 36 records each, with each 
        record containing 10 free-air gravity acceleration error 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 free-air gravity acceleration 
        error 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
        error in the free-air gravity accelerations 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>fairerr1.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>
