<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href="https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1J00.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<?xml-model href="https://pds.nasa.gov/pds4/mission/lro/v1/PDS4_LRO_1J00_1020.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<?xml-model href="https://pds.nasa.gov/pds4/disp/v1/PDS4_DISP_1J00_1510.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<?xml-model href="https://pds.nasa.gov/pds4/cart/v1/PDS4_CART_1J00_1970.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<?xml-model href="https://pds.nasa.gov/pds4/img/v1/PDS4_IMG_1J00_1870.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>

<Product_Observational
  xmlns="http://pds.nasa.gov/pds4/pds/v1"
  xmlns:pds="http://pds.nasa.gov/pds4/pds/v1"
  xmlns:disp="http://pds.nasa.gov/pds4/disp/v1"
  xmlns:cart="http://pds.nasa.gov/pds4/cart/v1"
  xmlns:lro="http://pds.nasa.gov/pds4/mission/lro/v1"
  xmlns:img="http://pds.nasa.gov/pds4/img/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
  http://pds.nasa.gov/pds4/mission/lro/v1 https://pds.nasa.gov/pds4/mission/lro/v1/PDS4_LRO_1J00_1020.xsd
  http://pds.nasa.gov/pds4/disp/v1 https://pds.nasa.gov/pds4/disp/v1/PDS4_DISP_1J00_1510.xsd
  http://pds.nasa.gov/pds4/cart/v1 https://pds.nasa.gov/pds4/cart/v1/PDS4_CART_1J00_1970.xsd
  http://pds.nasa.gov/pds4/img/v1 https://pds.nasa.gov/pds4/img/v1/PDS4_IMG_1J00_1870.xsd">

  <Identification_Area>
    <logical_identifier>urn:nasa:pds:lro-l-lroc-5-rdr:lrolrc_2001_data:bdr.wac_pole.wac_pole_ill_pct_north.wac_pole_ill_pct_north_100m</logical_identifier>
    <version_id>2.0</version_id>
    <title>WAC_POLE_ILL_PCT_NORTH_100M</title>
    <information_model_version>1.19.0.0</information_model_version>
    <product_class>Product_Observational</product_class>
    <Alias_List>
      <Alias>
        <alternate_id>WAC_POLE_ILL_PCT_NORTH_100M.IMG</alternate_id>
        <comment>Original filename at PDS3 archive, on-line at LROC Node</comment>
      </Alias>
    </Alias_List>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2025-12-12</modification_date>
        <version_id>2.0</version_id>
        <description>
          Correction to PDS4 labels.
        </description>
      </Modification_Detail>
      <Modification_Detail>
        <modification_date>2023-06-01</modification_date>
        <version_id>1.0</version_id>
        <description>
          This PDS4 labeled (detached label) product (orig PDS3 image) is a result
          migrating Lunar Reconnaissance Orbiter Camera RDR data to PDS4.
        </description>
      </Modification_Detail>
    </Modification_History>
  </Identification_Area>
  <Observation_Area>
    <Time_Coordinates>
      <start_date_time xsi:nil="true" nilReason="inapplicable"/>
      <stop_date_time xsi:nil="true" nilReason="inapplicable"/>
    </Time_Coordinates>
    <Primary_Result_Summary>
      <purpose>Science</purpose>
      <processing_level>Derived</processing_level>
      <description>
        WAC polar illumination map (88 to 90 deg North), derived from repeat
        observations acquired over one year (see [SPEYERERETAL2013]). This map
        indicates the percentage (PCT) of observations where the surface was
        illuminated in the north polar region and is sampled at 100 m/pixel in a
        polar stereographic projection centered at 90.0 N, 0.0 E. This map does
        not take into account the non-linear temporal sampling between
        observations.
      </description>
    </Primary_Result_Summary>
    <Investigation_Area>
      <name>Lunar Reconnaissance Orbiter</name>
      <type>Mission</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:investigation:mission.lunar_reconnaissance_orbiter</lid_reference>
        <reference_type>data_to_investigation</reference_type>
        <comment>This is the PDS4 logical identifier for LRO</comment>
      </Internal_Reference>
    </Investigation_Area>
    <Observing_System>
      <Observing_System_Component>
        <name>LUNAR RECONNAISSANCE ORBITER CAMERA</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:lro.lroc</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>
    <Mission_Area>
      <lro:LRO_Parameters>
        <lro:product_type>RDR</lro:product_type>
        <lro:product_version_id>1.3</lro:product_version_id>
        <lro:mission_phase_name>SCIENCE MISSION</lro:mission_phase_name>
        <lro:producer_institution_name>Arizona State University</lro:producer_institution_name>
      </lro:LRO_Parameters>
    </Mission_Area>
    <Discipline_Area>
      <img:Imaging>
        <Local_Internal_Reference>
          <local_identifier_reference>WAC_POLE_ILL_PCT_NORTH_100M</local_identifier_reference>
          <local_reference_type>imaging_parameters_to_image_object</local_reference_type>
        </Local_Internal_Reference>
        <img:Optical_Filter>
          <img:filter_name>643</img:filter_name>
          <img:bandwidth unit="nm">23</img:bandwidth>
          <img:center_filter_wavelength unit="nm">643</img:center_filter_wavelength>
        </img:Optical_Filter>
        <img:Sampling>
          <img:sample_bit_mask>2#11111111111111111111111111111111</img:sample_bit_mask>
        </img:Sampling>
      </img:Imaging>
      <cart:Cartography>
        <Local_Internal_Reference>
          <local_identifier_reference>WAC_POLE_ILL_PCT_NORTH_100M</local_identifier_reference>
          <local_reference_type>cartography_parameters_to_image_object</local_reference_type>
        </Local_Internal_Reference>
        <cart:Spatial_Domain>
          <cart:Bounding_Coordinates>
            <cart:west_bounding_coordinate unit="deg">0.0</cart:west_bounding_coordinate>
            <cart:east_bounding_coordinate unit="deg">360.0</cart:east_bounding_coordinate>
            <cart:north_bounding_coordinate unit="deg">90.0</cart:north_bounding_coordinate>
            <cart:south_bounding_coordinate unit="deg">88.0</cart:south_bounding_coordinate>
          </cart:Bounding_Coordinates>
        </cart:Spatial_Domain>
        <cart:Spatial_Reference_Information>
          <cart:Horizontal_Coordinate_System_Definition>
            <cart:Planar>
              <cart:Map_Projection>
                <cart:map_projection_name>Polar Stereographic</cart:map_projection_name>
                <cart:Polar_Stereographic>
                  <cart:longitude_of_central_meridian unit="deg">0.0</cart:longitude_of_central_meridian>
                  <cart:latitude_of_projection_origin unit="deg">90.0</cart:latitude_of_projection_origin>
                </cart:Polar_Stereographic>
                <!-- A specific description of this projection may be found in DSMAP.CAT in the CATALOG directory -->
              </cart:Map_Projection>
              <cart:Planar_Coordinate_Information>
                <cart:planar_coordinate_encoding_method>Coordinate Pair</cart:planar_coordinate_encoding_method>
                <cart:Coordinate_Representation>
                  <cart:pixel_resolution_x unit="deg/pixel">0.0032977886216808585</cart:pixel_resolution_x>
                  <cart:pixel_resolution_y unit="deg/pixel">0.0032977886216808585</cart:pixel_resolution_y>
                  <cart:pixel_scale_x unit="m/pixel">100.0</cart:pixel_scale_x>
                  <cart:pixel_scale_y unit="m/pixel">100.0</cart:pixel_scale_y>
                </cart:Coordinate_Representation>
              </cart:Planar_Coordinate_Information>
              <cart:Geo_Transformation>
                <cart:upperleft_corner_x unit="m">60650.0</cart:upperleft_corner_x>
                <cart:upperleft_corner_y unit="m">60650.0</cart:upperleft_corner_y>
              </cart:Geo_Transformation>
            </cart:Planar>
            <cart:Geodetic_Model>
              <cart:latitude_type>Planetocentric</cart:latitude_type>
              <cart:a_axis_radius unit="km">1737.4</cart:a_axis_radius>
              <cart:b_axis_radius unit="km">1737.4</cart:b_axis_radius>
              <cart:c_axis_radius unit="km">1737.4</cart:c_axis_radius>
              <cart:longitude_direction>Positive East</cart:longitude_direction>
            </cart:Geodetic_Model>
          </cart:Horizontal_Coordinate_System_Definition>
        </cart:Spatial_Reference_Information>
      </cart:Cartography>
      <disp:Display_Settings>
        <Local_Internal_Reference>
          <local_identifier_reference>Image_Array_Identifier</local_identifier_reference>
          <local_reference_type>display_settings_to_array</local_reference_type>
        </Local_Internal_Reference>
        <disp:Display_Direction>
          <disp:horizontal_display_axis>Sample</disp:horizontal_display_axis>
          <disp:horizontal_display_direction>Left to Right</disp:horizontal_display_direction>
          <disp:vertical_display_axis>Line</disp:vertical_display_axis>
          <disp:vertical_display_direction>Top to Bottom</disp:vertical_display_direction>
        </disp:Display_Direction>
      </disp:Display_Settings>
    </Discipline_Area>
  </Observation_Area>
  <Reference_List>
    <Internal_Reference>
      <lid_reference>urn:nasa:pds:lro-l-lroc-5-rdr:lrolrc_2001_data:bdr.wac_pole.wac_pole_ill_pct_north.wac_pole_ill_pct_north_readme</lid_reference>
      <reference_type>data_to_document</reference_type>
      <comment>documentation and citation(s) for this data product</comment>
    </Internal_Reference>
    <External_Reference>
      <doi>10.1007/s11214-010-9634-2</doi>
      <reference_text>
        Robinson, M. S.; Brylow, S. M.; Tschimmel, M.; Humm, D.; Lawrence, S. J.; Thomas, P. C.;
        Denevi, B. W.; Bowman-Cisneros, E.; Zerr, J.; Ravine, M. A.; Caplinger, M. A.; Ghaemi, F. T.; Schaffner, J. A.;
        Malin, M. C.; Mahanti, P.; Bartels, A.; Anderson, J.; Tran, T. N.; Eliason, E. M.; McEwen, A. S. Turtle, E.;
        Jolliff, B. L.; Hiesinger, H., 2010, "Lunar Reconnaissance Orbiter Camera (LROC) Instrument Overview", Space
        Science Reviews, Volume 150, Issue 1-4, pp. 81-124
      </reference_text>
      <description>instrument overview</description>
    </External_Reference>
  </Reference_List>
  <File_Area_Observational>
    <File>
      <file_name>WAC_POLE_ILL_PCT_NORTH_100M.IMG</file_name>
      <local_identifier>WAC_POLE_ILL_PCT_NORTH_100M</local_identifier>
      <creation_date_time>2020-08-31T22:44:06</creation_date_time>
      <file_size unit="byte">5904896</file_size>
      <md5_checksum>70fdc73a125449fbffddbdaa4c194dfd</md5_checksum>
      <comment>
        WAC polar illumination map (88 to 90 deg North), derived from repeat
        observations acquired over one year (see [SPEYERERETAL2013]). This map
        indicates the percentage (PCT) of observations where the surface was
        illuminated in the north polar region and is sampled at 100 m/pixel in a
        polar stereographic projection centered at 90.0 N, 0.0 E. This map does
        not take into account the non-linear temporal sampling between
        observations.
      </comment>
    </File>
    <Header>
      <offset unit="byte">0</offset>
      <object_length unit="byte">4856</object_length>
      <parsing_standard_id>PDS3</parsing_standard_id>
      <description>PDS3 attached header</description>
    </Header>
    <Array_2D_Image>
      <local_identifier>Image_Array_Identifier</local_identifier>
      <offset unit="byte">4856</offset>
      <axes>2</axes>
      <axis_index_order>Last Index Fastest</axis_index_order>
      <Element_Array>
        <data_type>IEEE754LSBSingle</data_type>
      </Element_Array>
      <Axis_Array>
        <axis_name>Line</axis_name>
        <elements>1214</elements>
        <sequence_number>1</sequence_number>
      </Axis_Array>
      <Axis_Array>
        <axis_name>Sample</axis_name>
        <elements>1214</elements>
        <sequence_number>2</sequence_number>
      </Axis_Array>
      <Special_Constants>
        <missing_constant>0xFF7FFFFB</missing_constant>
        <high_instrument_saturation>0xFF7FFFFE</high_instrument_saturation>
        <high_representation_saturation>0xFF7FFFFF</high_representation_saturation>
        <low_instrument_saturation>0xFF7FFFFD</low_instrument_saturation>
        <low_representation_saturation>0xFF7FFFFC</low_representation_saturation>
      </Special_Constants>
    </Array_2D_Image>
  </File_Area_Observational>
</Product_Observational>
