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    <level>3</level>
    <period>yearly</period>
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  <documentation>
    <doc_atbd>xxxxx_ATBD_xxxxx</doc_atbd>
    <doc_iodd>xxxxx_IODD_xxxxx</doc_iodd>
  </documentation>
  <instrument_information>
    <instrument_short_name>MERIS</instrument_short_name>
    <instrument_long_name>Medium Resolution Imaging Spectrometer</instrument_long_name>
    <plateform_name>ENVISAT</plateform_name>
  </instrument_information>
  <processing_information>
    <processing_centre>ACRI-ST</processing_centre>
    <processing_software_name>MKL3</processing_software_name>
    <processing_software_version>MKL3/3.2c </processing_software_version>
    <processing_utc>09-DEC-0005 17:35:30.000000</processing_utc>
    <processing_parameters> 201 2160 2 0.600000 0 0 -180.000000 180.000000 -90.000000 90.000000 0</processing_parameters>
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    <start_mjdp>   1827.034180942049</start_mjdp>
    <stop_utc>01-JAN-2006 00:20:56.736919</stop_utc>
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    <aoi_name>global</aoi_name>
    <grid_type>2</grid_type>
    <grid_name>sinusoidal</grid_name>
    <longitude_discretisation>
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      <maximum>     180.000</maximum>
      <step_deg>    0.083333</step_deg>
      <step_km>    9.276625</step_km>
      <longitude_units>degrees_east</longitude_units>
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      <latitude_units>degrees_north</latitude_units>
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    <registration>5</registration>
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    <var_short_name>N412</var_short_name>
    <var_long_name>Normalised water leaving radiance at 412 nm</var_long_name>
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