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<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
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  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.nac_pole.nac_pole_north_cm_avg.nac_pole_north_cm_avg_p848n2362</logical_identifier>
    <version_id>2.0</version_id>
    <title>1 meter/pixel</title>
    <information_model_version>1.19.0.0</information_model_version>
    <product_class>Product_Observational</product_class>
    <Alias_List>
      <Alias>
        <alternate_id>NAC_POLE_NORTH_CM_AVG_P848N2362.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>
        This is an average pixel value mosaic of a controlled mosaic consisting
        of 9687 NAC images of the lunar north polar region acquired between 2009
        and 2014. Control solutions were performed using the ISIS jigsaw
        application using 405,532 points and over three million measures. The
        network was constrained using 16,302 points in 226 images that were tied
        to Lunar Orbiter Laser Altimeter (LOLA) track data. The residuals from
        the bundle adjustment performed by ISIS jigsaw were (in pixels) a Sol.
        Variance of 0.40, a mean of 0.52, a standard deviation of 0.48, and a
        maximum of 13.0. The averaged mosaic was created by averaging the valid
        pixels covering an area of the mosaic producing a map that shows the
        general morphology but does not accurately represent any realistic
        lighting condition. The images were map projected using a polar digital
        elevation model derived from LOLA tracks. The mosaic range is 84 to 90
        degrees and is stored as 40 polar stereographic map tiles. The tiles
        have four latitudinal bands of 1.5 degrees radiating from the pole.
        There are four tiles in the first band (88.5 to 90 degrees latitude),
        eight in the second (87 to 88.5 degrees latitude), twelve in the third
        (85.5 to 87 degrees latitude), and sixteen in the fourth band (84 to
        85.5 degrees latitude). Stereographic projection at 1 meter/px centered
        at 90N, 0E with a radius of 1737400 m. The center of this tile is at
        84.8N, 236.2E. For more information see [ARCHINALETAL2023].
      </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>1.0</lro:product_version_id>
        <lro:mission_phase_name>NOMINAL MISSION</lro:mission_phase_name>
        <lro:mission_phase_name>SCIENCE MISSION</lro:mission_phase_name>
        <lro:mission_phase_name>EXTENDED 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>NAC_POLE_NORTH_CM_AVG_P848N2362</local_identifier_reference>
          <local_reference_type>imaging_parameters_to_image_object</local_reference_type>
        </Local_Internal_Reference>
        <img:Optical_Filter>
          <img:filter_name>600</img:filter_name>
          <img:bandwidth unit="nm">300</img:bandwidth>
          <img:center_filter_wavelength unit="nm">600</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>NAC_POLE_NORTH_CM_AVG_P848N2362</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">225.0</cart:west_bounding_coordinate>
            <cart:east_bounding_coordinate unit="deg">247.5</cart:east_bounding_coordinate>
            <cart:north_bounding_coordinate unit="deg">85.5</cart:north_bounding_coordinate>
            <cart:south_bounding_coordinate unit="deg">84.0</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</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">3.297788621680858e-05</cart:pixel_resolution_x>
                  <cart:pixel_resolution_y unit="deg/pixel">3.297788621680858e-05</cart:pixel_resolution_y>
                  <cart:pixel_scale_x unit="m/pixel">1.0</cart:pixel_scale_x>
                  <cart:pixel_scale_y unit="m/pixel">1.0</cart:pixel_scale_y>
                </cart:Coordinate_Representation>
              </cart:Planar_Coordinate_Information>
              <cart:Geo_Transformation>
                <cart:upperleft_corner_x unit="m">168244.5</cart:upperleft_corner_x>
                <cart:upperleft_corner_y unit="m">128768.5</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.nac_pole.nac_pole_north_cm_avg.nac_pole_north_cm_avg_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>NAC_POLE_NORTH_CM_AVG_P848N2362.IMG</file_name>
      <local_identifier>NAC_POLE_NORTH_CM_AVG_P848N2362</local_identifier>
      <creation_date_time>2022-10-07T09:52:50</creation_date_time>
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      <md5_checksum>c05831a4d30b43fb2f4d912aeb30ab97</md5_checksum>
      <comment>
        This is an average pixel value mosaic of a controlled mosaic consisting
        of 9687 NAC images of the lunar north polar region acquired between 2009
        and 2014. Control solutions were performed using the ISIS jigsaw
        application using 405,532 points and over three million measures. The
        network was constrained using 16,302 points in 226 images that were tied
        to Lunar Orbiter Laser Altimeter (LOLA) track data. The residuals from
        the bundle adjustment performed by ISIS jigsaw were (in pixels) a Sol.
        Variance of 0.40, a mean of 0.52, a standard deviation of 0.48, and a
        maximum of 13.0. The averaged mosaic was created by averaging the valid
        pixels covering an area of the mosaic producing a map that shows the
        general morphology but does not accurately represent any realistic
        lighting condition. The images were map projected using a polar digital
        elevation model derived from LOLA tracks. The mosaic range is 84 to 90
        degrees and is stored as 40 polar stereographic map tiles. The tiles
        have four latitudinal bands of 1.5 degrees radiating from the pole.
        There are four tiles in the first band (88.5 to 90 degrees latitude),
        eight in the second (87 to 88.5 degrees latitude), twelve in the third
        (85.5 to 87 degrees latitude), and sixteen in the fourth band (84 to
        85.5 degrees latitude). Stereographic projection at 1 meter/px centered
        at 90N, 0E with a radius of 1737400 m. The center of this tile is at
        84.8N, 236.2E. For more information see [ARCHINALETAL2023].
      </comment>
    </File>
    <Header>
      <offset unit="byte">0</offset>
      <object_length unit="byte">286828</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">286828</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>76523</elements>
        <sequence_number>1</sequence_number>
      </Axis_Array>
      <Axis_Array>
        <axis_name>Sample</axis_name>
        <elements>71707</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>
