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    xmlns="http://pds.nasa.gov/pds4/pds/v1"
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    xmlns:disp="http://pds.nasa.gov/pds4/disp/v1"
    xmlns:geom="http://pds.nasa.gov/pds4/geom/v1"
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    <Identification_Area>
        <logical_identifier>urn:nasa:pds:mro_sharad_simulations:data:s_01637101_emap</logical_identifier>
        <version_id>1.1</version_id>
        <title>SHARAD surface clutter simulation echo power map product</title>
        <information_model_version>1.16.0.0</information_model_version>
        <product_class>Product_Observational</product_class>
        <Citation_Information>
            <author_list>Christoffersen, M. S.; Holt, J. W.; Kempf, S. D.; O'Connell, J. D.</author_list>
            <publication_year>2021</publication_year>
            <description>Surface clutter simulations for SHARAD observations</description>
        </Citation_Information>
        <Modification_History>
            <Modification_Detail>
                <modification_date>2024-05-08</modification_date>
                <version_id>1.1</version_id>
                <description>Fixed stop subspacecraft longitude location so it matches the value in the RDR label.</description>
            </Modification_Detail>
            <Modification_Detail>
                <modification_date>2022-06-01</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>2010-01-23T03:40:21.614Z</start_date_time>
            <stop_date_time>2010-01-23T03:41:28.456Z</stop_date_time>
        </Time_Coordinates>

        <Investigation_Area>
            <name>MARS RECONNAISSANCE ORBITER</name>
            <type>Mission</type>
            <Internal_Reference>
                <lid_reference>urn:nasa:pds:context:investigation:mission.mars_reconnaissance_orbiter</lid_reference>
                <reference_type>data_to_investigation</reference_type>
            </Internal_Reference>
        </Investigation_Area>

        <Observing_System>
            <Observing_System_Component>
                <name>MARS RECONNAISSANCE ORBITER</name>
                <type>Host</type>
                <Internal_Reference>
                    <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.mro</lid_reference>
                    <reference_type>is_instrument_host</reference_type>
                </Internal_Reference>
            </Observing_System_Component>
            <Observing_System_Component>
                <name>SHALLOW RADAR for MRO</name>
                <type>Instrument</type>
                <Internal_Reference>
                    <lid_reference>urn:nasa:pds:context:instrument:sharad.mro</lid_reference>
                    <reference_type>is_instrument</reference_type>
                </Internal_Reference>
            </Observing_System_Component>
        </Observing_System>

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            <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>

        <Discipline_Area>
            <disp:Display_Settings>
                <Local_Internal_Reference>
                    <local_identifier_reference>Echo_Power_Map</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>

            <geom:Geometry>
                <geom:Geometry_Orbiter>
                    <geom:geometry_start_time_utc>2010-01-23T03:40:21.614Z</geom:geometry_start_time_utc>
                    <geom:geometry_stop_time_utc>2010-01-23T03:41:28.456Z</geom:geometry_stop_time_utc>
                    <geom:Surface_Geometry>
                        <geom:Surface_Geometry_Start_Stop>
                            <geom:start_subspacecraft_latitude unit="deg">66.185539</geom:start_subspacecraft_latitude>
                            <geom:stop_subspacecraft_latitude unit="deg">69.675010</geom:stop_subspacecraft_latitude>
                            <geom:start_subspacecraft_longitude unit="deg">235.99132</geom:start_subspacecraft_longitude>
                            <geom:stop_subspacecraft_longitude unit="deg">234.54475</geom:stop_subspacecraft_longitude>
                        </geom:Surface_Geometry_Start_Stop>
                    </geom:Surface_Geometry>
                </geom:Geometry_Orbiter>
            </geom:Geometry>
        </Discipline_Area>
    </Observation_Area>
    
    <Reference_List>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:mro_sharad_simulations:browse:s_01637101_browse</lid_reference>
            <reference_type>data_to_browse</reference_type>
            <comment>Clutter simulation browse images.</comment>
        </Internal_Reference>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:mro_sharad_simulations:data:s_01637101_sim</lid_reference>
            <reference_type>data_to_associate</reference_type>
            <comment>Surface clutter simulation..</comment>
        </Internal_Reference>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:mro_sharad_simulations:data:s_01637101_rtrn</lid_reference>
            <reference_type>data_to_associate</reference_type>
            <comment>First and nadir return records.</comment>
        </Internal_Reference>
        <External_Reference>
            <doi>10.1109/LGRS.2016.2581799</doi>
            <reference_text>P. Choudhary, J. W. Holt and S. D. Kempf, "Surface Clutter and Echo Location Analysis for the Interpretation of SHARAD Data From Mars," in IEEE Geoscience and Remote Sensing Letters, vol. 13, no. 9, pp. 1285-1289, Sept. 2016, doi: 10.1109/LGRS.2016.2581799.</reference_text>
            <description>Paper describing surface clutter simulation algorithm used to create this archive.</description>
        </External_Reference>
        <External_Reference>
            <doi>10.1016/j.icarus.2017.09.023</doi>
            <reference_text>N. E. Putzig, I. B. Smith, M. R. Perry, F. J. Foss, B. A. Campbell, R. J. Phillips, and R. Seu, "Three-dimensional radar imaging of structures and craters in the Martian polar caps," in Icarus, vol. 308, pp. 138-147, 2018, Mars Polar Science VI, doi: 10.1016/j.icarus.2017.09.023.</reference_text>
            <description>Paper descrbing the topographic model of Mars used to create these surface clutter simulations</description>
        </External_Reference>
        <External_Reference>
           <reference_text>MRO-M-SHARAD-5-RADARGRAM-V2.0:S_01637101_RGRAM</reference_text>
           <description>The clutter simulation product is related to this PDS3 SHARAD radargram product and can be used to aid interpretation of the radargram.</description>
        </External_Reference>
        <Source_Product_External>
            <external_source_product_identifier>MRO-M-SHARAD-5-RADARGRAM-V2.0:S_01637101_GEOM</external_source_product_identifier>
            <reference_type>data_to_derived_source_product</reference_type> 
            <curating_facility>PDS GEO</curating_facility>
            <description>SHARAD radargram geom file</description>
        </Source_Product_External>
        <Source_Product_External>
            <external_source_product_identifier>MGS-M-MOLA-5-MEGDR-L3-V1.0:MEGA90N000EB.IMG</external_source_product_identifier>
            <reference_type>data_to_derived_source_product</reference_type>
            <curating_facility>PDS GEO</curating_facility>
            <description>Model of the Martian areoid used to vertically datum this simulation.</description>
        </Source_Product_External>
        <Source_Product_External>
            <external_source_product_identifier>MRO-M-SPICE-6-V1.0</external_source_product_identifier>
            <reference_type>data_to_derived_source_product</reference_type> 
            <curating_facility>PDS NAIF</curating_facility>
            <description>Mars Reconnaissance Orbiter SPICE data archive</description>
        </Source_Product_External>
    </Reference_List>
    
    <File_Area_Observational>
        <File>
            <file_name>s_01637101_emap.img</file_name>
            <creation_date_time>2024-05-10T02:06:32.376Z</creation_date_time>
        </File>
        <Array_2D_Image>
            <local_identifier>Echo_Power_Map</local_identifier>
                        <offset unit="byte">0</offset>
                        <axes>2</axes>
                        <axis_index_order>Last Index Fastest</axis_index_order>
                        <description>The echo power map 2D image contains a map view of the relative intensity of simulated backscattered power from martian topography.</description>
                        <Element_Array>
                                <data_type>IEEE754LSBSingle</data_type>
                        </Element_Array>
            <Axis_Array>
                                <axis_name>Line</axis_name>
                                <elements>181</elements>
                                <sequence_number>1</sequence_number>
                        </Axis_Array>
                        <Axis_Array>
                                <axis_name>Sample</axis_name>
                                <elements>453</elements>
                                <sequence_number>2</sequence_number>
                        </Axis_Array>
        </Array_2D_Image>
    </File_Area_Observational>

</Product_Observational>
