<?xml version='1.0' encoding='UTF-8'?>
<?xml-model href="https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1P00.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<?xml-model href="https://pds.nasa.gov/pds4/ctli/v2/PDS4_CTLI_1P00_2300.sch" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<Product_Context xmlns="http://pds.nasa.gov/pds4/pds/v1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ctli="http://pds.nasa.gov/pds4/ctli/v2" xsi:schemaLocation="http://pds.nasa.gov/pds4/pds/v1 https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1P00.xsd http://pds.nasa.gov/pds4/ctli/v2 https://pds.nasa.gov/pds4/ctli/v2/PDS4_CTLI_1P00_2300.xsd">
  <Identification_Area>
    <logical_identifier>urn:nasa:pds:context:instrument:ody.themis</logical_identifier>
    <version_id>1.3</version_id>
    <title>2001 Mars Odyssey Spacecraft Thermal Emission Imaging System</title>
    <information_model_version>1.25.0.0</information_model_version>
    <product_class>Product_Context</product_class>
    <Alias_List>
      <Alias><alternate_title>urn:nasa:pds:context:instrument:themis.ody</alternate_title></Alias> <!-- deprecated LID -->
      <Alias><alternate_title>THERMAL EMISSION IMAGING SYSTEM</alternate_title></Alias>
      <Alias><alternate_title>THERMAL EMISSION IMAGING SYSTEM for ODY</alternate_title></Alias>
      <Alias><alternate_title>THEMIS</alternate_title></Alias>  <!-- per issue80 -->
    </Alias_List>
    <Modification_History>
      <Modification_Detail>
        <modification_date>2026-03-11</modification_date>
        <version_id>1.3</version_id>
        <description>Added alias THEMIS per issue 80</description>
      </Modification_Detail>
      <Modification_Detail>
        <modification_date>2025-12-24</modification_date>
        <version_id>1.2</version_id>
        <description>Updated schema version. Removed instrument_to_investigation references.</description>
      </Modification_Detail>
      <Modification_Detail>
        <modification_date>2025-02-16</modification_date>
        <version_id>1.1</version_id>
        <description>Updated schema version. Adding missing "investigation" references. Revised title and instrument name to common usage</description>
      </Modification_Detail>
      <Modification_Detail>
        <modification_date>2023-09-15</modification_date>
        <version_id>1.0</version_id>
        <description> Update to ody.themis and set alias to the original themis.ody. 
                    Updated to PDS4_PDS_1F00.xsd to allow for DOI and added DOI to reference. 
                    And per "Guide to PDS4 Context Products" v1.8, changed all lidvid_reference to lid_reference.
                    Added and then updated (2024-06-05) ctli for Instrument class, type = Imaging Spectrometer  
                </description>
      </Modification_Detail>
    </Modification_History>
  </Identification_Area>
  <Reference_List>
    <Internal_Reference>
      <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.ody</lid_reference>
      <reference_type>instrument_to_instrument_host</reference_type>
    </Internal_Reference>
    <External_Reference>
      <reference_text>
                   Christensen, P. R., Calibration Report for the Thermal Emission Imaging
                   System (THEMIS) for the Mars 2001 Odyssey Mission, September 2002.
            </reference_text>
      <description>reference.CHRISTENSEN2002</description>
    </External_Reference>
    <External_Reference>
      <doi>10.1023/B:SPAC.0000021008.16305.94</doi>
      <reference_text>
                   Christensen, P. R., B. M. Jakosky, H. H. Kieffer, M. C. Malin, H. Y.
                   McSween, Jr., K. Nealson, G. L. Mehall, S. H. Silverman, S. Ferry, and M.
                   Caplinger, (2004), The Thermal Emission Imaging System (THEMIS) for the Mars 2001
                   Odyssey Mission, Space Science Reviews volume 110, pages85–120.
            </reference_text>
      <description>reference.CHRISTENSENETAL2002</description>
    </External_Reference>
  </Reference_List>
  <Instrument>
    <name>2001 Mars Odyssey Spacecraft Thermal Emission Imaging System</name>
    <Type_List_Area>
      <ctli:Type_List>
        <ctli:type>Imaging Spectrometer</ctli:type>
      </ctli:Type_List>
    </Type_List_Area>
    <description>The 2001 Mars Odyssey Spacecraft (ODY) Thermal Emission Imaging System (THEMIS) flight instrument was designed to capture high-resolution images of the Martian surface. It uses both infrared and visible light to study temperature variations and surface composition. THEMIS provides data on surface features, mineral composition, and thermal properties, helping scientists understand Mars' geology and climate. It has been instrumental in identifying key landing sites and aiding in the selection of future exploration targets.</description>
  </Instrument>
</Product_Context>
