<?xml version="1.0" encoding="UTF-8"?>
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<?xml-model href="https://pds.nasa.gov/pds4/mission/mgn/v1/PDS4_MGN_1N00_1100.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<?xml-model href="https://pds.nasa.gov/pds4/cart/v1/PDS4_CART_1N00_1970.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
 
<Product_Observational xmlns="http://pds.nasa.gov/pds4/pds/v1"
  xmlns:mgn="http://pds.nasa.gov/pds4/mission/mgn/v1"
  xmlns:cart="http://pds.nasa.gov/pds4/cart/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_1N00.xsd
     http://pds.nasa.gov/pds4/mission/mgn/v1 https://pds.nasa.gov/pds4/mission/mgn/v1/PDS4_MGN_1N00_1100.xsd
     http://pds.nasa.gov/pds4/cart/v1 https://pds.nasa.gov/pds4/cart/v1/PDS4_CART_1N00_1970.xsd">
 
  <Identification_Area>
    <logical_identifier>urn:nasa:pds:magellan_gvdr:data_gvdr:gvpidx_sinu</logical_identifier>
    <version_id>1.0</version_id>
    <title>Magellan GVDR Sinusoidal Pixel Index Table: GVPIDX</title>
    <information_model_version>1.23.0.0</information_model_version>
    <product_class>Product_Observational</product_class>
  </Identification_Area>
  <Observation_Area>
    <Time_Coordinates>
       <start_date_time xsi:nil="true" nilReason="unknown"></start_date_time>
       <stop_date_time xsi:nil="true" nilReason="unknown"></stop_date_time>
    </Time_Coordinates>
    <Investigation_Area>
       <name>Magellan</name>
       <type>Mission</type>
       <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:investigation:mission.magellan</lid_reference>
          <reference_type>data_to_investigation</reference_type>
       </Internal_Reference>
    </Investigation_Area>
    <Observing_System>
      <Observing_System_Component>
        <name>The Magellan Spacecraft</name>
        <type>Host</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.mgn</lid_reference>
          <reference_type>is_instrument_host</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Magellan Spacecraft Radar System</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:mgn.rdrs</lid_reference>
          <reference_type>is_instrument</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
    </Observing_System>
    <Target_Identification>
      <name>Venus</name>
      <type>Planet</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:target:planet.venus</lid_reference>
        <reference_type>data_to_target</reference_type>
      </Internal_Reference>
    </Target_Identification>
  
    <Mission_Area>
      <mgn:Magellan_Parameters>
        <mgn:product_type>GVDR</mgn:product_type>       
        <mgn:start_orbit_number>376</mgn:start_orbit_number>
        <mgn:stop_orbit_number>5747</mgn:stop_orbit_number>
        <mgn:producer_institution_name>Stanford Center for Radar Astronomy</mgn:producer_institution_name>
        <mgn:original_pds_volume_id>gvdr_0001</mgn:original_pds_volume_id>
      </mgn:Magellan_Parameters>
    </Mission_Area>
  
    <Discipline_Area>
      <cart:Cartography>
        <Local_Internal_Reference>
          <local_identifier_reference>Table</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">0.00</cart:west_bounding_coordinate>
            <cart:east_bounding_coordinate unit="deg">360.00</cart:east_bounding_coordinate>
            <cart:north_bounding_coordinate unit="deg">90.00</cart:north_bounding_coordinate>
            <cart:south_bounding_coordinate unit="deg">-90.00</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>Sinusoidal</cart:map_projection_name>
                <cart:Sinusoidal>
                  <cart:longitude_of_central_meridian unit="deg">0</cart:longitude_of_central_meridian>
                </cart:Sinusoidal>
              </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="km/pixel">18.225</cart:pixel_resolution_x>
                  <cart:pixel_resolution_y unit="km/pixel">18.225</cart:pixel_resolution_y>
                  <cart:pixel_scale_x unit="pixel/deg">5.79478</cart:pixel_scale_x>
                  <cart:pixel_scale_y unit="pixel/deg">5.79478</cart:pixel_scale_y>
                </cart:Coordinate_Representation>
              </cart:Planar_Coordinate_Information>
              <cart:Geo_Transformation>
                <cart:upperleft_corner_x unit="km">-9.1125</cart:upperleft_corner_x>
                <cart:upperleft_corner_y unit="km">9504.3375</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">6051.0</cart:a_axis_radius>
              <cart:b_axis_radius unit="km">6051.0</cart:b_axis_radius>
              <cart:c_axis_radius unit="km">6051.0</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>
    </Discipline_Area>
  </Observation_Area>
  
  <Reference_List>
    <Internal_Reference>
      <lid_reference>urn:nasa:pds:magellan_gvdr:document:gvdrsis</lid_reference>
      <reference_type>data_to_document</reference_type>
    </Internal_Reference>
    <Source_Product_Internal>
      <lidvid_reference>urn:nasa:pds:magellan_arcdr::1.0</lidvid_reference>
      <reference_type>data_to_derived_source_product</reference_type>
    </Source_Product_Internal>
    <Source_Product_External>
      <external_source_product_identifier>MGN-V-RDRS-5-SCVDR-V1.0</external_source_product_identifier>
      <reference_type>data_to_derived_source_product</reference_type>
      <doi>10.17189/1522514</doi>
      <curating_facility>GEO</curating_facility>
    </Source_Product_External>
  </Reference_List>
  
  <File_Area_Observational>
    <File>
      <file_name>gvpidx.tab</file_name>
      <creation_date_time>1994-05-10T23:12:03.000</creation_date_time>
    </File>
    <Table_Binary>
      <local_identifier>Table</local_identifier>
      <offset unit="byte">0</offset>
      <records>1469440</records>
      <description>
        This file is the pixel index, used in the second step in all pixel lookup operations. See the description of the 
        GVTIDX file for a discussion of how to use this file.                
        
        Each row in the GVPIDX file corresponds to a single pixel, and its elements are pointers to the rows, relative 
        to the start of the tile, at which that pixel begins. The GVPIDX elements also give the number of rows 
        associated with the pixel in question.
      </description>
      <Record_Binary>
        <fields>8</fields>
        <groups>0</groups>
        <record_length unit="byte">12</record_length>
        <Field_Binary>
          <name>XIF Start</name>
          <field_number>1</field_number>
          <field_location unit="byte">1</field_location>
          <data_type>UnsignedMSB2</data_type>
          <field_length unit="byte">2</field_length>
          <description>
            The row in the GVXIF table containing the first XIF sample for this pixel, with numbering starting at 0 at 
            the first pixel in this tile. To find the absolute row number, add the 'XIF Start' to the value of 
            'XIF Tile Start' from the appropriate row in the GVTIDX table. If there are no XIF samples (that is, if the 
            value of 'XIF Samples' is zero), the value of this field is set to zero.
          </description>
        </Field_Binary>
        <Field_Binary>
          <name>RDF Start</name>
          <field_number>2</field_number>
          <field_location unit="byte">3</field_location>
          <data_type>UnsignedMSB2</data_type>
          <field_length unit="byte">2</field_length>
          <description>
            The row in the GVRDF table containing the first RDF sample for this pixel, with numbering starting at 0 at 
            the first pixel in this tile. To find the absolute row number, add the 'RDF Start' to the value of 
            'RDF Tile Start' from the appropriate row in the GVTIDX table. If there are no RDF samples (that is, if the 
            value of 'RDF Samples' is zero), the value of this field is set to zero.
          </description>
        </Field_Binary>
        <Field_Binary>
          <name>ADF Start</name>
          <field_number>3</field_number>
          <field_location unit="byte">5</field_location>
          <data_type>UnsignedMSB2</data_type>
          <field_length unit="byte">2</field_length>
          <description>
            The row in the GVADF table containing the first ADF sample for this pixel, with numbering starting at 0 at 
            the first pixel in this tile. To find the absolute row number, add the 'ADF Start' to the value of 
            'ADF Tile Start' from the appropriate row in the GVTIDX table. If there are no ADF samples (that is, if the 
            value of 'ADF Samples' is zero), the value of this field is set to zero.
          </description>
        </Field_Binary>
        <Field_Binary>
          <name>ANF Start</name>
          <field_number>4</field_number>
          <field_location unit="byte">7</field_location>
          <data_type>UnsignedMSB2</data_type>
          <field_length unit="byte">2</field_length>
          <description>
            The row in the GVANF table containing the first ANF sample for this pixel, with numbering starting at 0 at 
            the first pixel in this tile. To find the absolute row number, add the 'ANF Start' to the value of 
            'ANF Tile Start' from the appropriate row in the GVTIDX table. If there are no ANF samples (that is, if the 
            value of 'ANF Samples' is zero), the value of this field is set to zero.
          </description>
        </Field_Binary>
        <Field_Binary>
          <name>XIF Samples</name>
          <field_number>5</field_number>
          <field_location unit="byte">9</field_location>
          <data_type>UnsignedByte</data_type>
          <field_length unit="byte">1</field_length>
          <description>
            The number of XIF samples for this pixel. These samples are found consecutively in the GVXIF table starting      
            at the row indicated by 'XIF Start'.
          </description>
        </Field_Binary>
        <Field_Binary>
          <name>RDF Samples</name>
          <field_number>6</field_number>
          <field_location unit="byte">10</field_location>
          <data_type>UnsignedByte</data_type>
          <field_length unit="byte">1</field_length>
          <description>
            The number of RDF samples for this pixel. These samples are found consecutively in the GVRDF table starting      
            at the row indicated by 'RDF Start'.
          </description>
        </Field_Binary>
        <Field_Binary>
          <name>ADF Samples</name>
          <field_number>7</field_number>
          <field_location unit="byte">11</field_location>
          <data_type>UnsignedByte</data_type>
          <field_length unit="byte">1</field_length>
          <description>
            The number of ADF samples for this pixel. These samples are found consecutively in the GVADF table starting      
            at the row indicated by 'ADF Start'.
          </description>
        </Field_Binary>
        <Field_Binary>
          <name>ANF Samples</name>
          <field_number>8</field_number>
          <field_location unit="byte">12</field_location>
          <data_type>UnsignedByte</data_type>
          <field_length unit="byte">1</field_length>
          <description>
            The number of ANF samples for this pixel. These samples are found consecutively in the GVANF table starting      
            at the row indicated by 'ANF Start'.
          </description>
        </Field_Binary>
      </Record_Binary> 
    </Table_Binary>
  </File_Area_Observational>
  <File_Area_Observational_Supplemental>
    <File>
      <file_name>gvpidx.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>
  <File_Area_Observational_Supplemental>
    <File>
      <file_name>gvpidx.fmt</file_name>
    </File>
    <Stream_Text>
      <offset unit="byte">0</offset>
      <parsing_standard_id>PDS3</parsing_standard_id>
      <description>Original PDS3 format file</description>
      <record_delimiter>Carriage-Return Line-Feed</record_delimiter>
    </Stream_Text>
  </File_Area_Observational_Supplemental>
</Product_Observational>
