<?xml version="1.0" encoding="UTF-8"?>
<?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/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:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  xmlns:vikinglander="http://pds.nasa.gov/pds4/mission/vikinglander/v1"
  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/mission/vikinglander/v1 https://pds.nasa.gov/pds4/mission/vikinglander/v1/PDS4_VIKINGLANDER_1L00_1000.xsd">
  <Identification_Area>
    <logical_identifier>urn:nasa:pds:vl_seis_derived:data_derived:vpds_high_xdat</logical_identifier>
    <version_id>1.0</version_id>
    <title>Viking Lander Seismometer Data Product: vpds_high_xdat</title>
    <information_model_version>1.21.0.0</information_model_version>
    <product_class>Product_Observational</product_class>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2024-05-03</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>1976-09-04T00:53:01Z</start_date_time>
      <stop_date_time>1978-03-16T23:35:35Z</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>Seismometer for VL2</name>
        <type>Instrument</type>
        <Internal_Reference>
          <lid_reference>urn:nasa:pds:context:instrument:seis.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>high_rate</vikinglander:product_type_name>
          <vikinglander:mission_phase_name>Primary_Mission</vikinglander:mission_phase_name>
          <vikinglander:mission_phase_name>Extended_Mission</vikinglander:mission_phase_name>
          <vikinglander:start_sol_number>0</vikinglander:start_sol_number>
          <vikinglander:stop_sol_number>560</vikinglander:stop_sol_number>
        </vikinglander:Observation_Information>
      </vikinglander:Viking_Lander_Parameters>
    </Mission_Area>
  </Observation_Area>
  <File_Area_Observational>
    <File>
      <file_name>vpds_high_xdat.csv</file_name>
      <creation_date_time>2016-12-12</creation_date_time>
    </File>
    <Table_Delimited>
      <offset unit="byte">0</offset>
      <parsing_standard_id>PDS DSV 1</parsing_standard_id>
      <description>This file is the full raw X-axis High-rate mode 
        record of the Viking Seismometer data. In High rate mode, raw velocity 
        values are streamed from the instrument at about 20 Hz.  
        For details see VPDS_HIGH_XYZDAT_FORMAT.TXT in the DOCUMENT directory.
        Time is Local Lander Time.</description>
      <records>47361</records>
      <record_delimiter>Carriage-Return Line-Feed</record_delimiter>
      <field_delimiter>Comma</field_delimiter>
      <Record_Delimited>
        <fields>6</fields>
        <groups>1</groups>
        <Field_Delimited>
          <name>archived_record_number</name>
          <field_number>1</field_number>
          <data_type>ASCII_Integer</data_type>
          <description>An ordinal number indicating the record in 
            the present file and in the corresponding raw archive files. The 
            records are ordered sequentially, but occasionally this value skips 
            due to corrupted original data.</description>
        </Field_Delimited>
        <Field_Delimited>
          <name>seismic_sol</name>
          <field_number>2</field_number>
          <data_type>ASCII_Real</data_type>
          <description>The decimal sol number on which the data were 
            acquired. The mission time in decimal Sols (i.e. 
            sol+(hr*3600.0+min*60.0+sec)/88775.24). Landing day is sol 0.</description>
        </Field_Delimited>
        <Field_Delimited>
          <name>data_acquisition_sol</name>
          <field_number>3</field_number>
          <data_type>ASCII_Integer</data_type>
          <description>The sol number on which the data were acquired. 
            Landing day is sol 0.</description>
        </Field_Delimited>
        <Field_Delimited>
          <name>data_acquisition_hour</name>
          <field_number>4</field_number>
          <data_type>ASCII_Integer</data_type>
          <description>The hour of acquisition end.</description>
        </Field_Delimited>
        <Field_Delimited>
          <name>data_acqusition_minute</name>
          <field_number>5</field_number>
          <data_type>ASCII_Integer</data_type>
          <description>The minute of acquisition end.</description>
        </Field_Delimited>
        <Field_Delimited>
          <name>data_acquisition_second</name>
          <field_number>6</field_number>
          <data_type>ASCII_Integer</data_type>
          <description>The second of acquisition end. Note that the
            data in the VUSA file are reported at 20.2Hz, thus the start of 
            acquisition is typically 4 seconds before this time.</description>
        </Field_Delimited>
        <Group_Field_Delimited>
          <group_number>1</group_number>
          <repetitions>83</repetitions>
          <fields>1</fields>
          <groups>0</groups>
          <Field_Delimited>
            <name>x_axis_readings</name>
            <field_number>1</field_number>
            <data_type>ASCII_Integer</data_type>
            <description>The set of 83 X-axis readings. 1 digital unit 
              (DU) corresponds roughly to 2nm at 3Hz (see seismic_dataset.txt).
            </description>
          </Field_Delimited>
        </Group_Field_Delimited>
      </Record_Delimited>
    </Table_Delimited>
  </File_Area_Observational>
  <File_Area_Observational_Supplemental>
    <File>
      <file_name>vpds_high_xdat.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>
