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            <gco:CharacterString>The Met Office Observation-based research Boundary Layer Facility, at the semi-rural field site (18 Ha) of Cardington (52° 06′ N, 00° 25′ W, 29 m ± 1 m amsl) in central-southern England between 2004 and 2024, operated three Halo Photonics Streamline Doppler lidars, denoted by unit numbers 01, 30 and 35. This dataset covers data from unit 35.

All three Halo systems were based on a 1565 nm laser emitting linearly polarized pulsed light through an 8 cm diameter lens with a heterodyne detector. Laser beam returns from the atmosphere are range-gated velocity and back-scattered power. The Halo systems are capable of full hemispheric scanning of the backscatter coefficient and radial velocity as a function of beam range.

The usual operation at Cardington was vertical stares (zenith angle=0°) with periodic wind scans that invoked various options of off-axis views. Wind profiles performed every 30 min was the default operation for wind scans. Most profiles of horizontal wind within the dataset are based on DBS (Doppler beam swinging) scans which use a tri-axis azimuthally orthogonal technique using the single lidar beam to retrieve horizontal mean wind components. This scan was chosen for the bulk of the time because it only takes about 21 s to complete, which leaves 98% of the available time to vertical stares if one wind scan is completed every 30 min. More recent scans in the dataset have used multi-axis VAD (velocity azimuth display) scans, which are a more involved version of the DBS scans and use 6 or 12 point off-zenith views. The vertical stares, DBS and VAD wind scans produced separate archived netCDF files.

Although depolarisation capability was possible with #35, this was only switched on occasionally during certain weather conditions.

A full list of NetCDF variables can be found in &quot;Continuous meteorological surface and soil records (2004-2024) at the Met Office surface site of Cardington, UK.&quot; Osborne et al. ESSD (2025). This paper should be referenced in any research/publications pertaining to this dataset.

To ensure optimal traceability and transparency of data, comprehensive metadata is included.</gco:CharacterString>
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                  </gmd:phone>
                  
                  <gmd:address>
                    <gmd:CI_Address>
                      
                      
                      <gmd:deliveryPoint>
                        <gco:CharacterString>RAL Space</gco:CharacterString>
                      </gmd:deliveryPoint>
                      
                      
                      <gmd:deliveryPoint>
                        <gco:CharacterString>STFC Rutherford Appleton Laboratory, Harwell Campus</gco:CharacterString>
                      </gmd:deliveryPoint>
                      
                      
                      <gmd:city>
                        <gco:CharacterString>Didcot</gco:CharacterString>
                      </gmd:city>
                      
                      
                      <gmd:postalCode>
                        <gco:CharacterString>OX11 0QX</gco:CharacterString>
                      </gmd:postalCode>
                      
                      
                      <gmd:country>
                        <gco:CharacterString>United Kingdom</gco:CharacterString>
                      </gmd:country>
                      
                      
                      <gmd:electronicMailAddress>
                      
                        <gco:CharacterString>support@ceda.ac.uk</gco:CharacterString>
                      
                      </gmd:electronicMailAddress>
                    </gmd:CI_Address>
                  </gmd:address>
                </gmd:CI_Contact>
              </gmd:contactInfo>
              <gmd:role>
                <gmd:CI_RoleCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact">pointOfContact</gmd:CI_RoleCode>
              </gmd:role>
            </gmd:CI_ResponsibleParty>
          </gmd:pointOfContact>
           
           
              
          <gmd:pointOfContact>
            <gmd:CI_ResponsibleParty>
              
              <gmd:organisationName>
                <gco:CharacterString>NERC EDS Centre for Environmental Data Analysis</gco:CharacterString>
              </gmd:organisationName>
              
              <gmd:positionName>
                <gco:CharacterString>publisher</gco:CharacterString>
              </gmd:positionName>
              <gmd:contactInfo>
                <gmd:CI_Contact>
                  
                  <gmd:phone>
                    <gmd:CI_Telephone>
                      <gmd:voice>
                        <gco:CharacterString>01235446432</gco:CharacterString>
                      </gmd:voice>
                    </gmd:CI_Telephone>
                  </gmd:phone>
                  
                  <gmd:address>
                    <gmd:CI_Address>
                      
                      
                      <gmd:deliveryPoint>
                        <gco:CharacterString>RAL Space</gco:CharacterString>
                      </gmd:deliveryPoint>
                      
                      
                      <gmd:deliveryPoint>
                        <gco:CharacterString>STFC Rutherford Appleton Laboratory, Harwell Campus</gco:CharacterString>
                      </gmd:deliveryPoint>
                      
                      
                      <gmd:city>
                        <gco:CharacterString>Didcot</gco:CharacterString>
                      </gmd:city>
                      
                      
                      <gmd:postalCode>
                        <gco:CharacterString>OX11 0QX</gco:CharacterString>
                      </gmd:postalCode>
                      
                      
                      <gmd:country>
                        <gco:CharacterString>United Kingdom</gco:CharacterString>
                      </gmd:country>
                      
                      
                      <gmd:electronicMailAddress>
                      
                        <gco:CharacterString>support@ceda.ac.uk</gco:CharacterString>
                      
                      </gmd:electronicMailAddress>
                    </gmd:CI_Address>
                  </gmd:address>
                </gmd:CI_Contact>
              </gmd:contactInfo>
              <gmd:role>
                <gmd:CI_RoleCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="publisher">publisher</gmd:CI_RoleCode>
              </gmd:role>
            </gmd:CI_ResponsibleParty>
          </gmd:pointOfContact>
           
           
          <gmd:resourceMaintenance>
            <gmd:MD_MaintenanceInformation>
              <gmd:maintenanceAndUpdateFrequency>
                <gmd:MD_MaintenanceFrequencyCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="notPlanned">notPlanned</gmd:MD_MaintenanceFrequencyCode>
              </gmd:maintenanceAndUpdateFrequency>
              <gmd:updateScope>
                <gmd:MD_ScopeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset">dataset</gmd:MD_ScopeCode>
              </gmd:updateScope>
            </gmd:MD_MaintenanceInformation>
          </gmd:resourceMaintenance>
          
          <gmd:descriptiveKeywords>
            <gmd:MD_Keywords>
          	
            
              <gmd:keyword>
                <gco:CharacterString>Doppler lidar</gco:CharacterString>
              </gmd:keyword>
            
              <gmd:keyword>
                <gco:CharacterString>vertical stares</gco:CharacterString>
              </gmd:keyword>
            
              <gmd:keyword>
                <gco:CharacterString>wind scans</gco:CharacterString>
              </gmd:keyword>
            
              <gmd:keyword>
                <gco:CharacterString>measurement</gco:CharacterString>
              </gmd:keyword>
            
              <gmd:keyword>
                <gco:CharacterString>Cardington</gco:CharacterString>
              </gmd:keyword>
            
              <gmd:keyword>
                <gco:CharacterString>Met Office</gco:CharacterString>
              </gmd:keyword>
            
            </gmd:MD_Keywords>
          </gmd:descriptiveKeywords>
          
          <gmd:descriptiveKeywords>
            <gmd:MD_Keywords>
              
              <gmd:keyword>
                <gco:CharacterString>atmospheric conditions</gco:CharacterString>
              </gmd:keyword>
              
              <gmd:type>
                  <gmd:MD_KeywordTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_KeywordTypeCode"
                                          codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
              </gmd:type>
              <gmd:thesaurusName>
                <gmd:CI_Citation>
                  <gmd:title>
                    <gco:CharacterString>GEMET - INSPIRE themes, version 1.0</gco:CharacterString>
                  </gmd:title>
                  <gmd:date>
                    <gmd:CI_Date>
                      <gmd:date>
                        <gco:Date>2008-06-01</gco:Date>
                      </gmd:date>
                      <gmd:dateType>
                        <gmd:CI_DateTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication">publication</gmd:CI_DateTypeCode>
                      </gmd:dateType>
                    </gmd:CI_Date>
                  </gmd:date>
                </gmd:CI_Citation>
              </gmd:thesaurusName>
            </gmd:MD_Keywords>
          </gmd:descriptiveKeywords>


          <gmd:resourceConstraints>
            <gmd:MD_LegalConstraints>
              <gmd:accessConstraints>
                <gmd:MD_RestrictionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_RestrictionCode" codeListValue="otherRestrictions">otherRestrictions</gmd:MD_RestrictionCode>
              </gmd:accessConstraints>
              <gmd:otherConstraints>
                
                  <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/noLimitations">
                
                  Public data: access to these data is available to both registered and non-registered users.
                  </gmx:Anchor>
                </gmd:otherConstraints>
            </gmd:MD_LegalConstraints>
          </gmd:resourceConstraints>
          <gmd:resourceConstraints>
            <gmd:MD_LegalConstraints>
              <gmd:useConstraints>
                <gmd:MD_RestrictionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_RestrictionCode" codeListValue="otherRestrictions">otherRestrictions</gmd:MD_RestrictionCode>
              </gmd:useConstraints>
              
                
                  <gmd:otherConstraints>
                    <gmx:Anchor xlink:title="Licence file link." xlink:href="http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/">
                      Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any and attribution required use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
                    </gmx:Anchor>
                  </gmd:otherConstraints>
                
              
            </gmd:MD_LegalConstraints>
          </gmd:resourceConstraints>


          <gmd:spatialRepresentationType>
            <gmd:MD_SpatialRepresentationTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_SpatialRepresentationTypeCode"
                                                  codeListValue="grid">grid</gmd:MD_SpatialRepresentationTypeCode>
         </gmd:spatialRepresentationType>
          <gmd:spatialResolution>
            <gmd:MD_Resolution>
                <gmd:distance  gco:nilReason="inapplicable"/>
            </gmd:MD_Resolution>
          </gmd:spatialResolution>
          <gmd:language>
            <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/php/code_list.php" codeListValue="eng">English</gmd:LanguageCode>
          </gmd:language>
          
          <gmd:topicCategory>
            <gmd:MD_TopicCategoryCode>climatologyMeteorologyAtmosphere</gmd:MD_TopicCategoryCode>
          </gmd:topicCategory>
          
          
          <gmd:extent>
            <gmd:EX_Extent>
              <gmd:geographicElement>
                <gmd:EX_GeographicBoundingBox>
                  <gmd:westBoundLongitude>
                    <gco:Decimal>-0.42161</gco:Decimal>
                  </gmd:westBoundLongitude>
                  <gmd:eastBoundLongitude>
                    <gco:Decimal>-0.42161</gco:Decimal>
                  </gmd:eastBoundLongitude>
                  <gmd:southBoundLatitude>
                    <gco:Decimal>52.10469</gco:Decimal>
                  </gmd:southBoundLatitude>
                  <gmd:northBoundLatitude>
                    <gco:Decimal>52.10469</gco:Decimal>
                  </gmd:northBoundLatitude>
                </gmd:EX_GeographicBoundingBox>
              </gmd:geographicElement>
            </gmd:EX_Extent>
          </gmd:extent>
          
          <gmd:extent>
            <gmd:EX_Extent>
               <gmd:temporalElement>
                 <gmd:EX_TemporalExtent>
                   <gmd:extent>
                     <gml:TimePeriod gml:id="CEDA01">
                       <gml:beginPosition>2012-04-02T17:26:04</gml:beginPosition>
                       
                       <gml:endPosition>2024-12-25T23:59:59</gml:endPosition>
                       
                     </gml:TimePeriod>
                   </gmd:extent>
                 </gmd:EX_TemporalExtent>
               </gmd:temporalElement>
             </gmd:EX_Extent>
           </gmd:extent>
        </gmd:MD_DataIdentification>
      </gmd:identificationInfo>
      <gmd:distributionInfo>
        <gmd:MD_Distribution>
          <gmd:distributionFormat>
            <gmd:MD_Format>
              <gmd:name>
                <gco:CharacterString>Data are NetCDF formatted</gco:CharacterString>
              </gmd:name>
              <gmd:version  gco:nilReason="unknown" />
            </gmd:MD_Format>
          </gmd:distributionFormat>
          <gmd:distributor>
            <gmd:MD_Distributor>
              <gmd:distributorContact>
                <gmd:CI_ResponsibleParty>
                  <gmd:organisationName>
                    <gco:CharacterString>NERC EDS Centre for Environmental Data Analysis</gco:CharacterString>
                  </gmd:organisationName>
                  <gmd:positionName>
                    <gco:CharacterString>Data Center Contact</gco:CharacterString>
                  </gmd:positionName>
                  <gmd:contactInfo>
                    <gmd:CI_Contact>
                      
                      <gmd:phone>
                        <gmd:CI_Telephone>
                          <gmd:voice>
                            <gco:CharacterString>01235446432</gco:CharacterString>
                          </gmd:voice>
                        </gmd:CI_Telephone>
                      </gmd:phone>
                      
                      <gmd:address>
                        <gmd:CI_Address>
                          
                          <gmd:deliveryPoint>
                            <gco:CharacterString>RAL Space</gco:CharacterString>
                          </gmd:deliveryPoint>
                          
                          
                          <gmd:deliveryPoint>
                            <gco:CharacterString>STFC Rutherford Appleton Laboratory, Harwell Campus</gco:CharacterString>
                          </gmd:deliveryPoint>
                          
                          
                          <gmd:city>
                            <gco:CharacterString>Didcot</gco:CharacterString>
                          </gmd:city>
                          
                          
                          <gmd:postalCode>
                            <gco:CharacterString>OX11 0QX</gco:CharacterString>
                          </gmd:postalCode>
                          
                          
                          <gmd:country>
                            <gco:CharacterString>United Kingdom</gco:CharacterString>
                          </gmd:country>
                          
                          <gmd:electronicMailAddress>
                            <gco:CharacterString>support@ceda.ac.uk</gco:CharacterString>
                          </gmd:electronicMailAddress>
                        </gmd:CI_Address>
                      </gmd:address>
                    </gmd:CI_Contact>
                  </gmd:contactInfo>
                  <gmd:role>
                    <gmd:CI_RoleCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="distributor">distributor</gmd:CI_RoleCode>
                  </gmd:role>
                </gmd:CI_ResponsibleParty>
              </gmd:distributorContact>
            </gmd:MD_Distributor>
          </gmd:distributor>
          <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
              <gmd:onLine>
                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>https://catalogue.ceda.ac.uk/uuid/77bef4103ec2426281a5e74ccc0ba5c7</gmd:URL>
                  </gmd:linkage>
                  <gmd:name>
                    <gco:CharacterString>CEDA Data Catalogue Page</gco:CharacterString>
                  </gmd:name>
                  <gmd:description>
                    <gco:CharacterString>Detail and access information for the resource</gco:CharacterString>
                  </gmd:description>
                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
                  </gmd:function>
                </gmd:CI_OnlineResource>
              </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
          </gmd:transferOptions>
          
          <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
              <gmd:onLine>
                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>http://data.ceda.ac.uk/badc/ukmo-cardington/data/complete-collection/lidar/halo-lidar-35</gmd:URL>
                  </gmd:linkage>
                  <gmd:name>
                    <gco:CharacterString>DOWNLOAD</gco:CharacterString>
                  </gmd:name>
                  <gmd:description>
                    <gco:CharacterString>Download Data</gco:CharacterString>
                  </gmd:description>
                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
                  </gmd:function>
                </gmd:CI_OnlineResource>
              </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
          </gmd:transferOptions>
          
          
        </gmd:MD_Distribution>
      </gmd:distributionInfo>
      <gmd:dataQualityInfo>
        <gmd:DQ_DataQuality>
          <gmd:scope>
            <gmd:DQ_Scope>
              <gmd:level>
                <gmd:MD_ScopeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset">dataset</gmd:MD_ScopeCode>
              </gmd:level>
            </gmd:DQ_Scope>
          </gmd:scope>
          <gmd:report>
            <gmd:DQ_DomainConsistency>
              <gmd:result>
                 <gmd:DQ_ConformanceResult>
                    <gmd:specification>
                       <gmd:CI_Citation>
                          <gmd:title>
                             <gco:CharacterString>Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services</gco:CharacterString>
                          </gmd:title>
                          <gmd:date>
                             <gmd:CI_Date>
                                <gmd:date>
                                   <gco:Date>2010-12-08</gco:Date>
                                </gmd:date>
                                <gmd:dateType>
                                   <gmd:CI_DateTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/gmxCodelists.xml#CI_DateTypeCode"
                                                        codeListValue="publication"/>
                                </gmd:dateType>
                             </gmd:CI_Date>
                          </gmd:date>
                       </gmd:CI_Citation>
                    </gmd:specification>
                    <gmd:explanation gco:nilReason="inapplicable"/>
                    <gmd:pass gco:nilReason="unknown"/>
                 </gmd:DQ_ConformanceResult>
              </gmd:result>
            </gmd:DQ_DomainConsistency>
          </gmd:report>
          <gmd:lineage>
            <gmd:LI_Lineage>
              <gmd:statement>
                <gco:CharacterString>Data were collected by the Met Office Meteorological Research Unit, Cardington, during its operational period. These data have been standardised for the production of this dataset, following similar file metadata conventions for all associated datasets within the continuous hydro-meteorological record (2004-2024) at the Met Office surface site of Cardington, UK Dataset Collection, as described more fully within Osborne et al., (2025). This standardisation approach addressed, where possible, any known data and metadata issues. Data were then deposited at the Centre for Environmental Data Analysis (CEDA) for long-term archival.</gco:CharacterString>
              </gmd:statement>
            </gmd:LI_Lineage>
          </gmd:lineage>
        </gmd:DQ_DataQuality>
      </gmd:dataQualityInfo>     
    </gmd:MD_Metadata>
