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        <logical_identifier>urn:nasa:pds:mro_sharad_3d</logical_identifier>
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        <title>Mars Reconnaissance Orbiter SHARAD 3D Radargram Bundle</title>
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            <publication_year>2025</publication_year>
            <doi>10.17189/a5av-yc11</doi>            
            <description>
                This bundle contains three-dimensional (3D) volumes of radar sounding data for Mars collected 
                by the SHARAD instrument on the Mars Reconnaissance Orbiter. Each such 3D radargram consists 
                of an amalgamation of data collected over many SHARAD tracks crossing a given projected area. 
                Each 3D radargram contains values of the radar backscatter power, strength, or amplitude 
                arranged in an array with either time delay or depth on the fastest varying (Z) axis, the 
                projection X coordinate on the slowest varying axis, and the projection Y coordinate on the 
                intermediately varying axis. The label file for each 3D radargram contains information about 
                the axes sampling intervals, projections, and data scaling.
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                    <given_name>Nathaniel</given_name>
                    <family_name>Putzig</family_name>
                    <Affiliation>
                        <organization_name>Planetary Science Institute</organization_name>
                    </Affiliation>
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                    <given_name>Fritz</given_name>
                    <family_name>Foss</family_name>
                    <Affiliation>
                        <organization_name>Planetary Science Institute</organization_name>
                    </Affiliation>
                </Person>
            </List_Author>
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                <Person>
                    <given_name>Matthew</given_name>
                    <family_name>Perry</family_name>
                    <Affiliation>
                        <organization_name>Planetary Science Institute</organization_name>
                    </Affiliation>
                </Person>
            </List_Author>
            <List_Author>
                <Person>
                    <given_name>Gareth</given_name>
                    <family_name>Morgan</family_name>
                    <Affiliation>
                        <organization_name>Planetary Science Institute</organization_name>
                    </Affiliation>
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            <List_Author>
                <Person>
                    <given_name>Paul</given_name>
                    <family_name>Sava</family_name>
                    <Affiliation>
                        <organization_name>Colorado School of Mines</organization_name>
                    </Affiliation>
                </Person>
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                    <given_name>Jennifer</given_name>
                    <family_name>Ward</family_name>
                    <Affiliation>
                        <organization_name>Washington University in St. Louis</organization_name>
                    </Affiliation>
                </Person>
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            <Modification_Detail>
                <modification_date>2025-10-22</modification_date>
                <version_id>3.0</version_id>
                <description>
                    Addition of version 2 3D radargrams for Planum Boreum and Eastern Deuteronilus Mensae.
                </description>
            </Modification_Detail>
            <Modification_Detail>
                <modification_date>2025-08-11</modification_date>
                <version_id>2.0</version_id>
                <description>Initial PDS3-to-PDS4 migration.</description>
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                <modification_date>2022-10-27</modification_date>
                <version_id>1.0</version_id>
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            <stop_date_time>2020-05-23T05:08:23.939Z</stop_date_time>
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        <Primary_Result_Summary>
            <purpose>Science</purpose>
            <processing_level>Derived</processing_level>
        </Primary_Result_Summary>
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            <name>Mars Reconnaissance Orbiter</name>
            <type>Mission</type>
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        </Investigation_Area>
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            <name>SHARAD</name>
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                <name>The Mars Reconnaissance Orbiter</name>
                <type>Host</type>
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                <name>Mars Reconnaissance Orbiter Shallow Radar</name>
                <type>Instrument</type>
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            <name>Mars</name>
            <type>Planet</type>
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            <lid_reference>urn:nasa:pds:mro_sharad_3d:document:3d_processing</lid_reference>
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            <doi>10.1190/tle36010043.1</doi>
            <reference_text>Foss, F.J., N.E. Putzig, B.A. Campbell, and R.J. Phillips, 2017, 3D imaging of 
                Mars' polar ice caps using orbital radar data, The Leading Edge, 36, 43-57.
            </reference_text>
        </External_Reference>
        <External_Reference>
            <doi>10.1016/j.icarus.2023.115793</doi>
            <reference_text>Foss, F.J., N.E. Putzig, B.A. Campbell, S.A. Levin, M.R. Perry, J.W. Holt, 
                M.S. Christoffersen, I.B. Smith, G.A. Morgan, and A.T. Russell, 2024, Producing 3-D 
                radargrams from orbital radar sounding data at Mars: History, results, methods, lessons, and 
                plans. Icarus, 419, 115793.
            </reference_text>
        </External_Reference>
        <External_Reference>
            <doi>10.1016/j.icarus.2023.115716</doi>
            <reference_text> Perry, M.R., A.T. Russell, M.B. Russell, F.J. Foss, F.C. Chuang, G.A. Morgan, 
                Z.M. Bain, B.A. Campbell, and N.E. Putzig, 2024, Three-dimensional imaging of martian 
                glaciated terrain using Mars Reconnaissance Orbiter Shallow Radar (SHARAD) observations.  
                Icarus, 419, 115716.
            </reference_text>
        </External_Reference>
        <External_Reference>
            <doi>10.1016/j.icarus.2017.09.023</doi>
            <reference_text>Putzig, N.E., I.B. Smith, M.R. Perry, F.J. Foss II, B.A. Campbell, R.J. Phillips, 
                and R. Seu, 2018, Three-dimensional radar imaging of structures and craters in the Martian 
                polar caps, Icarus, 308, 138-147.
            </reference_text>
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            <doi>10.3847/PSJ/ac9d3b</doi>
            <reference_text>Putzig, N.E., F.J. Foss II, B.A. Campbell, J.W. Holt, M.R. Perry, I.B. Smith, 
                A.T. Russell, S. Nerozzi, M.S. Christoffersen, I.H. Mueller, and P.C. Sava, 2022, New Views 
                of the Internal Structure of Planum Boreum from Enhanced 3D Imaging of Mars Reconnaissance 
                Orbiter Shallow Radar Data, Planet. Sci. J., 3, 259.
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