<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:gcmd="https://gcmd.earthdata.nasa.gov/kms#" xmlns:dcterms="http://purl.org/dc/terms/" xml:base="https://gcmd.earthdata.nasa.gov/kms/concept/">
  <gcmd:gcmd>
    <gcmd:termsOfUse>https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf</gcmd:termsOfUse>
    <gcmd:keywordVersion>draft</gcmd:keywordVersion>
    <gcmd:schemeVersion>2025-07-25</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/instruments/12f3a976-19d1-4d04-80cb-e2f6bf9fe39c</gcmd:viewer>
  </gcmd:gcmd>
  <skos:Concept rdf:about="12f3a976-19d1-4d04-80cb-e2f6bf9fe39c">
    <skos:broader rdf:resource="46238695-5577-4fad-91bf-0a2fdf8a9b19"/>
    <skos:prefLabel xml:lang="en">LaRC Aerosol Lidar</skos:prefLabel>
    <skos:changeNote>Date=2025-12-08 User Id=tstevens User Note=added new Instrument keyword</skos:changeNote>
    <skos:changeNote>Date=2025-12-08 User Id=system System Note=Added broader relation from LaRC Aerosol Lidar [12f3a976-19d1-4d04-80cb-e2f6bf9fe39c] to Lidar/Laser Spectrometers [46238695-5577-4fad-91bf-0a2fdf8a9b19]</skos:changeNote>
    <gcmd:reference gcmd:text="https://impact.earthdata.nasa.gov/casei/instrument/LaRC%20Aerosol%20Lidar/" xml:lang="en"/>
    <skos:definition xml:lang="en">The LaRC Aerosol Lidar is an airborne dual-polarization lidar system operated by Langley Research Center (LaRC). It measures lidar backscatter of aerosols, which can be used to determine aerosol optical properties. It has typically been used to collect airborne lidar measurements from polar stratospheric clouds (PSCs). The LaRC aerosol lidar consists of a ruby (694.3nm) and Nd:YAG (532 nm) laser systems and has a 14-inch diameter receiver. It has a repetition rate of 0.5 Hz.</skos:definition>
    <dcterms:modified>2025-12-08T14:37:05.513Z</dcterms:modified>
    <skos:inScheme rdf:resource="https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments"/>
    <gcmd:altLabel gcmd:text="LaRC Dual-Polarization Aerosol Lidar" xml:lang="en" gcmd:category="primary"/>
  </skos:Concept>
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