<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?xml-model href="https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1L00.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<?xml-model href="https://pds.nasa.gov/pds4/disp/v1/PDS4_DISP_1L00_1510.sch"  schematypens="http://purl.oclc.org/dsdl/schematron"?>
<?xml-model href="https://pds.nasa.gov/pds4/mission/vikinglander/v1/PDS4_VIKINGLANDER_1L00_1000.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:vikinglander="http://pds.nasa.gov/pds4/mission/vikinglander/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_1L00.xsd
   http://pds.nasa.gov/pds4/disp/v1 https://pds.nasa.gov/pds4/disp/v1/PDS4_DISP_1L00_1510.xsd
   http://pds.nasa.gov/pds4/mission/vikinglander/v1 https://pds.nasa.gov/pds4/mission/vikinglander/v1/PDS4_VIKINGLANDER_1L00_1000.xsd">
  <Identification_Area>
    <logical_identifier>urn:nasa:pds:vl_image_raw:data_raw:21e166_red</logical_identifier>
    <version_id>1.0</version_id>
    <title>Viking Lander Image Product: 21e166_red</title>
    <information_model_version>1.21.0.0</information_model_version>
    <product_class>Product_Observational</product_class>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2024-05-29</modification_date>
        <version_id>1.0</version_id>
        <description>Initial Version.</description>
      </Modification_Detail>
    </Modification_History>
  </Identification_Area>
  <Observation_Area>
    <Time_Coordinates>
      <start_date_time>1977-09-26T04:47:51Z</start_date_time>
      <stop_date_time>1977-09-26T05:11:44Z</stop_date_time>
    </Time_Coordinates>
    <Investigation_Area>
      <name>Viking</name>
      <type>Mission</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:investigation:mission.viking</lid_reference>
        <reference_type>data_to_investigation</reference_type>
      </Internal_Reference>
    </Investigation_Area>
    <Observing_System>
      <Observing_System_Component>
        <name>Viking Lander 2</name>
        <type>Host</type>
        <Internal_Reference>
           <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.vl2</lid_reference>
           <reference_type>is_instrument_host</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
      <Observing_System_Component>
        <name>Camera 1 for VL2</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:cam1.vl2</lid_reference>
          <reference_type>is_instrument</reference_type>
        </Internal_Reference>
      </Observing_System_Component>
    </Observing_System>
    <Target_Identification>
      <name>Mars</name>
      <type>Planet</type>
      <Internal_Reference>
        <lid_reference>urn:nasa:pds:context:target:planet.mars</lid_reference>
        <reference_type>data_to_target</reference_type>
      </Internal_Reference>
    </Target_Identification>
    <Mission_Area>
      <vikinglander:Viking_Lander_Parameters>
        <vikinglander:Observation_Information>
          <vikinglander:product_type_name>color_triplet</vikinglander:product_type_name>
          <vikinglander:mission_phase_name>Extended_Mission</vikinglander:mission_phase_name>
          <vikinglander:sol_number>377</vikinglander:sol_number>
          <vikinglander:local_hour>7.05</vikinglander:local_hour>
          <vikinglander:observation_name>pre-dawn twilight rescan of atmosphere</vikinglander:observation_name>
        </vikinglander:Observation_Information>
        <vikinglander:Image_Parameters>
          <vikinglander:diode_name>red</vikinglander:diode_name>
          <vikinglander:scan_start_azimuth unit="deg">325.0</vikinglander:scan_start_azimuth>
          <vikinglander:scan_stop_azimuth unit="deg">325.0</vikinglander:scan_stop_azimuth>
          <vikinglander:mirror_center_elevation unit="deg">10.0</vikinglander:mirror_center_elevation>
          <vikinglander:sampling_interval unit="deg">0.12</vikinglander:sampling_interval>
          <vikinglander:offset_number>1</vikinglander:offset_number>
          <vikinglander:gain_number>1</vikinglander:gain_number>
          <vikinglander:psa_temperature unit="degC">-20.2</vikinglander:psa_temperature>
          <vikinglander:scan_rate>250</vikinglander:scan_rate>
          <vikinglander:rescan_start_sample>2</vikinglander:rescan_start_sample>
          <vikinglander:rescan_total_samples>34</vikinglander:rescan_total_samples>
          <vikinglander:missing_scans>0</vikinglander:missing_scans>
          <vikinglander:downlink_path>recorded_uhf_link</vikinglander:downlink_path>
          <vikinglander:dust_flag>false</vikinglander:dust_flag>
        </vikinglander:Image_Parameters>
      </vikinglander:Viking_Lander_Parameters>
    </Mission_Area>
    <Discipline_Area>
      <disp:Display_Settings>
        <Local_Internal_Reference>
          <local_identifier_reference>image</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>
  
  <File_Area_Observational>
    <File>
      <file_name>21e166_red.img</file_name>
      <creation_date_time>2024-05-29</creation_date_time>
    </File>
    <Header>
      <name>pds3_label</name>
      <offset unit="byte">0</offset>
      <object_length unit="byte">2205</object_length>
      <parsing_standard_id>PDS3</parsing_standard_id>
      <description>Attached PDS3 label</description>
    </Header>
    <Table_Binary>
      <name>histogram</name>
      <offset unit="byte">2205</offset>
      <records>256</records>
      <Record_Binary>
        <fields>1</fields>
        <groups>0</groups>
        <record_length unit="byte">4</record_length>
        <Field_Binary>
          <name>histogram</name>
          <field_number>1</field_number>
          <field_location unit="byte">1</field_location>
          <data_type>SignedMSB4</data_type>
          <field_length unit="byte">4</field_length>
          <description>Frequency value for DNs 0 to 255.</description>
        </Field_Binary>
      </Record_Binary>
    </Table_Binary>
    <Array_2D_Image>
      <name>21e166_red</name>
      <local_identifier>image</local_identifier>
      <offset unit="byte">3255</offset>
      <axes>2</axes>
      <axis_index_order>Last Index Fastest</axis_index_order>
      <Element_Array>
        <data_type>UnsignedByte</data_type>
      </Element_Array>
      <Axis_Array>
        <axis_name>Line</axis_name>
        <elements>512</elements>
        <sequence_number>1</sequence_number>
      </Axis_Array>
      <Axis_Array>
        <axis_name>Sample</axis_name>
        <elements>35</elements>
        <sequence_number>2</sequence_number>
      </Axis_Array>
    </Array_2D_Image>
  </File_Area_Observational>
</Product_Observational>
