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<Product_Context xmlns="http://pds.nasa.gov/pds4/pds/v1"
  xmlns:pds="http://pds.nasa.gov/pds4/pds/v1" xmlns:ctli="http://pds.nasa.gov/pds4/ctli/v1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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    <Identification_Area>
        <logical_identifier>urn:nasa:pds:context:instrument:rss.near</logical_identifier>
        <version_id>1.1</version_id>
        <title>RADIO SCIENCE SUBSYSTEM for NEAR</title>
        <information_model_version>1.14.0.0</information_model_version>
        <product_class>Product_Context</product_class>
        <Modification_History>
          <Modification_Detail>
            <modification_date>2023-05-12</modification_date>
            <version_id>1.1</version_id>
            <description>
              Removed extraneous external references, replaced description with a short summary, 
              and added Type List Area
            </description>
          </Modification_Detail>
            <Modification_Detail>
                <modification_date>2016-10-01</modification_date>
                <version_id>1.0</version_id>
                <description>
                    extracted metadata from PDS3 catalog and
                    modified to comply with PDS4 Information Model
                </description>
            </Modification_Detail>
        </Modification_History>
    </Identification_Area>

    <Reference_List>
        <Internal_Reference>
            <lid_reference>urn:nasa:pds:context:instrument_host:spacecraft.near</lid_reference>
            <reference_type>instrument_to_instrument_host</reference_type>
        </Internal_Reference>
      <External_Reference>
        <reference_text>
          Konopliv, A.S., J.K. Miller, W.M.       
          Owen, D.K. Yeomans, J.D. Giorgini, R. Garmier, J.-P. Barriot, 'A Global     
          Solution for the Gravity Field, Rotation, Landmarks, and Ephemeris of       
          Eros,' 16th International Symposium on Space Dynamics, Pasadena, CA,        
          USA, 2001.
        </reference_text>
        <description>reference.KONOPLIVETAL2001</description>
      </External_Reference>
      <External_Reference>
        <reference_text>
          Yeomans, D.K., J.-P. Barriot, D.W.      
          Dunham, R.W. Farquhar, J.D. Giorgini, C.E. Helfrich, A.S. Konopliv, J.V.    
          McAdams, J.K. Miller, W.M. Owen Jr., D.J. Scheeres, S.P. Synnott, B.G.      
          Williams, 'Estimating the Mass of Asteroid 253 Mathilde from Tracking       
          Data During the NEAR Flyby,' Science, 278, 2106-2109, 1997.
        </reference_text>
        <description>reference.YEOMANSETAL1997B</description>
      </External_Reference>
      <External_Reference>
        <reference_text>
          Yeomans, D.K., P.G. Antreasian,         
          A. Cheng, D.W. Dunham, R.W. Farquhar, R.W. Gaskell, J.D. Giorgini,          
          C.E. Helfrich, A.S. Konopliv, J.V. Mcadams, J.K. Miller, W.M. Owen Jr.,     
          P.C. Thomas, J. Veverka, B.G. Williams, 'Estimating The Mass Of Asteroid    
          433 Eros During The Near Spacecraft Flyby,' Science, 285, 560-561,          
          1999.
        </reference_text>
        <description>reference.YEOMANSETAL1999</description>
      </External_Reference>
      <External_Reference>
        <reference_text>
          Yeomans, D.K., P.G. Antreasian,         
          J.-P. Barriot, S.R. Chesley, D.W. Dunham, R.W. Farquhar, J.D. Giorgini,     
          C.E. Helfrich, A.S. Konopliv, J.V. McAdams, J.K. Miller, W.M. Owen, D.J.    
          Scheeres, P.C. Thomas, J. Veverka, B.G. Williams, 'Radio Science Results    
          During the NEAR Shoemaker Spacecraft Rendezvous with Eros,' Science,        
          289, 2085-2088, 2000.
        </reference_text>
        <description>reference.YEOMANSETAL2000</description>
      </External_Reference>
    </Reference_List>
    
    <Instrument>
        <name>RADIO SCIENCE SUBSYSTEM</name>
      <Type_List_Area>
        <ctli:Type_List>
          <ctli:type>Radio Science</ctli:type>
        </ctli:Type_List>
      </Type_List_Area>
        <description>
 The NEAR Radio Science Subsystem (RSS) used a coherent X-band transponder to conduct a 
 radio science investigation by measuring the Doppler shift from the spacecraft's radial           
 velocity component relative to the Earth.  Accurate measurements of the Doppler shift 
 and the range to Earth as the spacecraft orbited Eros allowed mapping of the asteroid's         
 gravity field. In conjunction with MSI/NIS and NLR data, gravity determinations were 
 combined with global shape and rotation data to constrain the internal density structure 
 of Eros and search for heterogeneity.  Spacecraft tracking data for the radio science 
 experiment were also obtained for a mass determination of Asteroid 253 Mathilde.
        </description>
    </Instrument>
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