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      <title>MESSENGER RSS Raw Data Bundle</title>
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      <Citation_Information>
        <author_list>Perry, M. E.; Lemoine, F. G.; Smith, D. E.; Ensor, S.; Reid, M. R.; Verma, A. K.; Simpson, R. A.</author_list>
         <publication_year>2022</publication_year>
         <doi>10.17189/tcy9-gv38</doi>
         <description>
              This bundle contains raw radio data that can be used to determine the position
              and velocity of the MESSENGER spacecraft during flybys of Venus and Mercury and
              during orbital operations around Mercury.  The bundle also contains measurements
              of occultation times and calibrations for the effects of Earth's ionosphere and
              troposphere, meteorological conditions at stations of the NASA Deep Space
              Network, thruster activity, and changes in spacecraft antenna selection.  The
              data were used to determine the gravity field and shape of Mercury and to
              improve solar system ephemerides.  The bundle is a migration of data from the
              original PDS3 archive with minor improvements and corrections.
         </description>
      </Citation_Information>
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          <stop_date_time>2015-05-10T23:59:59.999Z</stop_date_time>
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         <processing_level>Raw</processing_level>
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        <Observing_System_Component>                                                                 
          <name>DSN Antenna DSS 55</name>                                                            
          <type>Telescope</type>                                                                     
          <Internal_Reference>                                                                       
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          </Internal_Reference>                                                                      
        </Observing_System_Component>                                                                
        <Observing_System_Component>                                                                 
          <name>DSN Antenna DSS 63</name>                                                            
          <type>Telescope</type>                                                                     
          <Internal_Reference>                                                                       
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          </Internal_Reference>                                                                      
        </Observing_System_Component>                                                                
        <Observing_System_Component>                                                                 
          <name>DSN Antenna DSS 65</name>                                                            
          <type>Telescope</type>                                                                     
          <Internal_Reference>                                                                       
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   <Reference_List>
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      <description>
              This bundle contains raw radio data that can be used to determine the position
              and velocity of the MESSENGER spacecraft during flybys of Venus and Mercury and
              during orbital operations around Mercury.  The bundle also contains measurements
              of occultation times and calibrations for the effects of Earth's ionosphere and
              troposphere, meteorological conditions at stations of the NASA Deep Space
              Network, thruster activity, and changes in spacecraft antenna selection.  The
              data were used to determine the gravity field and shape of Mercury and to
              improve solar system ephemerides.  The bundle is a migration of data from the
              original PDS3 archive with minor improvements and corrections.
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