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  <citation>
   <citeinfo>
    <origin>Sivaraman, Chitra</origin>
    <origin>McFarlane, Sally</origin>
    <title>MPL: 30-second cloud mask using the first Z. Wang, et al algorithm at Southern Great Plains </title>
    <pubdate>20130813</pubdate>
    <onlink>http://www.archive.arm.gov/discovery/#v/results/s/s::mplcmask </onlink>
    <onlink>http://dx.doi.org/10.5439/1027736 </onlink>
    <datasetid>armsgp30smplcmask1zwang </datasetid>
    <geoform>Observational Data</geoform>
   </citeinfo>
  </citation>
  <descript>
   <abstract>
An operational cloud boundary algorithm has been implemented for use with the ARM micropulse lidar (MPL) systems. In addition to retrieving cloud boundaries above 500 m, the Micropulse Lidar Cloud Mask (MPLCMASK) value-added product (VAP) applies lidar-spe
cific corrections (i.e., range-square, background, deadtime, and overlap) to the measured backscattered lidar. Depolarization ratio is computed using the methodology developed by Flynn et al. (2007) for polarization-capable MPL systems. The cloud boundarie
s output from MPLCMASK will be the primary lidar cloud mask for input to the Active Remote Sensing of Clouds (ARSCL) VAP and will be applied to all MPL systems, including historical data sets. </abstract>
   <supplinf> mplcmask handbook is available at: http://www.arm.gov/publications/tech_reports/handbooks/mplcmask_handbook.pdf  </supplinf>
  </descript>
  <timeperd>
   <timeinfo>
    <rngdates>
     <begdate>19960501 </begdate>
     <enddate>. </enddate>
    </rngdates>
   </timeinfo>
  </timeperd>
  <status>
   <progress>Ongoing </progress>
   <update>Daily </update>
  </status>
  <spdom>
   <bounding>
    <westbc>-95.59 </westbc>
    <eastbc>-95.59 </eastbc>
    <northbc>34.98 </northbc>
    <southbc>34.98 </southbc>
   </bounding>
  </spdom>
  <keywords>
   <theme>
    <themekt>science keywords</themekt>
    <themekey>Atmospheric Radiation Measurement</themekey>
    <themekey>DOE ARM</themekey>
    <themekey>ARM</themekey>
    <themekey>ARM Derived Product </themekey>
    <themekey>Cloud Properties </themekey>
    <themekey>Aerosols </themekey>
    <themekey>Cloud Properties </themekey>
    <themekey>macrophysical </themekey>
    <themekey>microphysical </themekey>
    <themekey>optical and radiative properties </themekey>
    <themekey>Total attenuated backscatter </themekey>
    <themekey>Lowest cloud base height </themekey>
    <themekey>Highest cloud top height </themekey>
    <themekey>Backscattered radiation </themekey>
    <themekey>Cloud base height </themekey>
    <themekey>Cloud top height </themekey>
    <themekey>sgp30smplcmask1zwangC1.c1 </themekey>
   </theme>
   <theme>
    <themekt>Instrument</themekt>
    <themekey>ARM Cloud mask from Micropulse Lidar </themekey>
   </theme>
   <place>
    <placekt>Place Keywords</placekt>
    <placekey>sgp.C1: Southern Great Plains ,Central Facility, Lamont, OK </placekey>
   </place>
  </keywords>
  <ptcontac>
   <cntinfo>
    <cntperp>
     <cntper>Chitra Sivaraman </cntper>
    </cntperp>
    <cntemail>chitra.sivaraman@pnnl.gov </cntemail>
    <cntaddr>
     <addrtype>Mailing and Physical Address</addrtype>
     <city>Richland </city>
     <state>WA </state>
     <postal>99352 </postal>
     <country>USA </country>
    </cntaddr>
    <cntvoice>N/A</cntvoice>
   </cntinfo>
  </ptcontac>
 </idinfo>
 <distinfo>
  <distrib>
   <cntinfo>
    <cntperp>
     <cntorg>Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee, USA</cntorg>
     <cntper>ARM Archive User Services</cntper>
    </cntperp>
    <cntvoice>+1-865-241-4851</cntvoice>
    <cntemail>armarchive@ornl.gov</cntemail>
   </cntinfo>
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  <resdesc>Atmospheric Radiation Measurement (ARM) Program Data Sets. 1993-Ongoing. Available at http://www.archive.arm.gov from the ARM Archive, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee, USA</resdesc>
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   <cntinfo>
    <cntorgp>
     <cntorg>Atmospheric Radiation Measurement Program</cntorg>
     <cntper>ARM Archive User Services</cntper>
    </cntorgp>
    <cntaddr>
     <addrtype>Mailing and Physical Address</addrtype>
     <address>P.O. Box 2008, MS 6407</address>
     <city>Oak Ridge</city>
     <state>Tennessee</state>
     <postal>37831</postal>
     <country>USA</country>
    </cntaddr>
    <cntperp>
     <cntper>ARM Archive User Services</cntper>
    </cntperp>
    <cntvoice>865-241-4851</cntvoice>
    <cntemail>armarchive@ornl.gov</cntemail>
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  <metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
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