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    <logical_identifier>urn:nasa:pds:mess-rs-raw:data-ddor</logical_identifier>
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    <title>MESSENGER Radio Science Delta Differential One-way Ranging (DDOR) Data Products Collection</title>
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    <Citation_Information>
      <author_list>Verma, A. K.; Perry, M. E.; Lemoine, F. G.; Smith, D. E.; Ensor, S.; Reid, M. R.</author_list>
      <publication_year>2020</publication_year>
      <description> DDOR files were generated in the TNF (TRK-2-34) format and contain only TNF data type 10 records. The TNF collection in the MESSENGER archive does not contain data type 10 records.</description>
    </Citation_Information>
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      <lid_reference>urn:nasa:pds:radiosci.documentation:dsn.trk-2-34:2002-12-15</lid_reference>
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      <comment>Reference document for the Radio Science Delta Differential One-way Ranging (DDOR) data.
                For data collected earlier or later than this document, consult other
                document products in the same collection.
                This document describes TRK-2-34 data; the DDOR is the extraction of data type 10 from a TRK-2-34 original.
                See sections 3.1.1-3.1.4, 3.1.4.4, and 3.1.5.4.1 in the referenced document.</comment>
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            during the MESSENGER mission.</description>
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