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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/591" xlink:actuate="onRequest">LONGITUDE</gmx:Anchor>
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          <gmd:keyword>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/257" xlink:actuate="onRequest">pH</gmx:Anchor>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/506" xlink:actuate="onRequest">SHORTWAVE RADIATION - REFLECTED</gmx:Anchor>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/422" xlink:actuate="onRequest">WAVE HEIGHT - SIGNIFICANT</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/431" xlink:actuate="onRequest">WIND DIRECTION</gmx:Anchor>
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          <gmd:keyword>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/437" xlink:actuate="onRequest">WIND SPEED</gmx:Anchor>
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          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
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      <gmd:descriptiveKeywords>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/8" xlink:actuate="onRequest">CTD</gmx:Anchor>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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          <gmd:keyword>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/obstype/details/18" xlink:actuate="onRequest">profile</gmx:Anchor>
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          <gmd:keyword>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
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      <gmd:descriptiveKeywords>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/platform/details/2565" xlink:actuate="onRequest">moorings</gmx:Anchor>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="platform">platform</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>NODC PLATFORM NAMES THESAURUS</gco:CharacterString>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/254" xlink:actuate="onRequest">US DOI/US Geological Survey/Woods Hole Science Center</gmx:Anchor>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="dataCentre">dataCentre</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>NODC COLLECTING INSTITUTION NAMES THESAURUS</gco:CharacterString>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/254" xlink:actuate="onRequest">US DOI/US Geological Survey/Woods Hole Science Center</gmx:Anchor>
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                <gco:CharacterString>NODC SUBMITTING INSTITUTION NAMES THESAURUS</gco:CharacterString>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/224" xlink:actuate="onRequest">Coastal Waters of Louisiana</gmx:Anchor>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/91" xlink:actuate="onRequest">North Atlantic Ocean</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/93" xlink:actuate="onRequest">North Pacific Ocean</gmx:Anchor>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/212" xlink:actuate="onRequest">Stellwagen Bank National Marine Sanctuary</gmx:Anchor>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="place">place</gmd:MD_KeywordTypeCode>
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            <gco:CharacterString>oceanography</gco:CharacterString>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="dataCentre">dataCentre</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>Global Change Master Directory (GCMD) Data Center Keywords</gco:CharacterString>
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                  <gmd:date>
                    <gco:Date>2026</gco:Date>
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                    <gmd:CI_DateTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision">revision</gmd:CI_DateTypeCode>
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                            <gco:CharacterString>MD</gco:CharacterString>
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                            <gmd:URL>https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords</gmd:URL>
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            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/5c439818-3a80-4c6d-9d2c-74ea1f1a294a" xlink:actuate="onRequest">OCEAN &gt; ATLANTIC OCEAN &gt; NORTH ATLANTIC OCEAN &gt; MEDITERRANEAN SEA &gt; ADRIATIC SEA</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
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                <gmd:CI_Date>
                  <gmd:date>
                    <gco:Date>2026</gco:Date>
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                  <gmd:dateType>
                    <gmd:CI_DateTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision">revision</gmd:CI_DateTypeCode>
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                            <gco:CharacterString>Greenbelt</gco:CharacterString>
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                      </gmd:address>
                      <gmd:onlineResource>
                        <gmd:CI_OnlineResource>
                          <gmd:linkage>
                            <gmd:URL>https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords</gmd:URL>
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                            <gco:CharacterString>HTTPS</gco:CharacterString>
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      <gmd:resourceConstraints xlink:title="NCEI Data Citation Statement">
        <gmd:MD_LegalConstraints>
          <gmd:useConstraints>
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      <gmd:resourceConstraints>
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            <gco:CharacterString>Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.</gco:CharacterString>
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      <gmd:resourceConstraints>
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            <gmd:MD_RestrictionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_RestrictionCode" codeListValue="otherRestrictions">otherRestrictions</gmd:MD_RestrictionCode>
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          <gmd:otherConstraints>
            <gco:CharacterString>Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.</gco:CharacterString>
          </gmd:otherConstraints>
        </gmd:MD_LegalConstraints>
      </gmd:resourceConstraints>
      <gmd:language>
        <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/php/code_list.php" codeListValue="eng">eng; USA</gmd:LanguageCode>
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      <gmd:topicCategory>
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      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>geoscientificInformation</gmd:MD_TopicCategoryCode>
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        </gmd:EX_Extent>
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        <gco:CharacterString>Some of these data sets have been previously submitted in the following accessions: 0049879, 0052766, 0053940, 0053941, 0058714, 0066005, 0066007, 0066008, 0066097, 0066098, 0066099, 0067553, 0067554, 0067555, 0067557, 0067570, 0067572 0067573, 0067576, 0067577, 0067568, 0042026, 0049880, 0053671, 0054154, 0056730, 0060062, 0061443, 0061458, 0066009, 0066107, 0066109, 0066110, 0066111, 0067556, 0067558,0067569, 0067571, 0067574, 0067575, and 0054153.</gco:CharacterString>
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            <gmd:MD_StandardOrderProcess>
              <gmd:fees>
                <gco:CharacterString>In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.</gco:CharacterString>
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              <gmd:orderingInstructions>
                <gco:CharacterString>Contact NCEI for other distribution options and instructions.</gco:CharacterString>
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                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>https://www.ncei.noaa.gov/archive/accession/0156446</gmd:URL>
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                  <gmd:protocol>
                    <gco:CharacterString>HTTPS</gco:CharacterString>
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                  <gmd:applicationProfile>
                    <gco:CharacterString>Web browser</gco:CharacterString>
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                  <gmd:name>
                    <gco:CharacterString>NCEI Dataset Landing Page</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>Navigate directly to the URL for a descriptive web page with download links.</gco:CharacterString>
                  </gmd:description>
                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
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              <gmd:onLine>
                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>https://www.ncei.noaa.gov/data/oceans/ncei/archive/data/0156446/</gmd:URL>
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                  <gmd:protocol>
                    <gco:CharacterString>HTTPS</gco:CharacterString>
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                  <gmd:applicationProfile>
                    <gco:CharacterString>Web browser</gco:CharacterString>
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                  <gmd:name>
                    <gco:CharacterString>HTTPS</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>Navigate directly to the URL for data access and direct download.</gco:CharacterString>
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                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
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              <gmd:onLine>
                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>ftp://ftp-oceans.ncei.noaa.gov/pub/data.nodc/ncei/archive/data/0156446/</gmd:URL>
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                  <gmd:name>
                    <gco:CharacterString>FTP</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).</gco:CharacterString>
                  </gmd:description>
                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
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              </gmd:onLine>
              <gmd:onLine>
                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>https://www.ncei.noaa.gov/thredds-ocean/catalog/ncei/archive/data/0156446/catalog.html</gmd:URL>
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                    <gco:CharacterString>THREDDS</gco:CharacterString>
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                    <gco:CharacterString>Web browsers can browse THREDDS Data Servers and specialized THREDDS software can enable more sophisticated data access and visualizations.</gco:CharacterString>
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                    <gco:CharacterString>These data are available through a variety of services via a THREDDS (Thematic Real-time Environmental Distributed Data Services) Data Server (TDS). Depending on the dataset, the TDS can provide WMS, WCS, DAP, HTTP, and other data access and metadata services as well. For more information on the TDS, see http://www.unidata.ucar.edu/software/thredds/current/tds/.</gco:CharacterString>
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                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
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              <gmd:onLine>
                <gmd:CI_OnlineResource>
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                  <gmd:description>
                    <gco:CharacterString>Navigate directly to the URL for a descriptive web page with download links.</gco:CharacterString>
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                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
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                  <gmd:name>
                    <gco:CharacterString>HTTPS</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>Navigate directly to the URL for data access and direct download.</gco:CharacterString>
                  </gmd:description>
                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
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              </gmd:onLine>
              <gmd:onLine>
                <gmd:CI_OnlineResource>
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                  <gmd:name>
                    <gco:CharacterString>FTP</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).</gco:CharacterString>
                  </gmd:description>
                  <gmd:function>
                    <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode>
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                            <gmd:CI_DateTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication">publication</gmd:CI_DateTypeCode>
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                          <gmd:contactInfo>
                            <gmd:CI_Contact>
                              <gmd:onlineResource>
                                <gmd:CI_OnlineResource>
                                  <gmd:linkage>
                                    <gmd:URL>https://www.ncei.noaa.gov/archive/accession/0156446/1.1</gmd:URL>
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                                    <gco:CharacterString>HTTPS</gco:CharacterString>
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      <gmd:maintenanceNote>
        <gco:CharacterString>Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.</gco:CharacterString>
      </gmd:maintenanceNote>
      <gmd:contact>
        <gmd:CI_ResponsibleParty>
          <gmd:organisationName>
            <gco:CharacterString>NOAA National Centers for Environmental Information</gco:CharacterString>
          </gmd:organisationName>
          <gmd:role>
            <gmd:CI_RoleCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode>
          </gmd:role>
        </gmd:CI_ResponsibleParty>
      </gmd:contact>
    </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
  <gmi:acquisitionInformation>
    <gmi:MI_AcquisitionInformation id="AMS">
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_beee">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>ADCP</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>ADCP</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>Acoustic Doppler Current Profiler

The Acoustic Doppler Current Profiler (ADCP) measures currents beneath a ship while underway. Sound signals sent from the moving ship bounce back to receivers aboard the ship. This provides a profile of water movement relative to the ship-precise modern navigation, allowing the ship's motion to be subtracted from the data. These devices are also used on moorings and profilers and, along with acoustic backscattering, measure animal biomass. Particles in the path of the sound waves, mostly plankton, reflect a small part of the sound energy back toward receivers, allowing researchers to make remote estimates of the sizes and numbers of animals present in the water column. Before the 1970's, the most technologically advanced instrument used to measure water velocity was known as a Doppler speed log. This evolved into the first commercial ADCP, produced in the mid-1970's, which used averaging. Later in the 1970's, the first vessel-mounted ADCP was developed to measure water velocity more accurately and to allow measurement in range cells over a depth profile.

As instruments evolved, so did new techniques in Doppler signal processing. Initially, Doppler speed logs used simple analog signal processing methods, which are still used in some commercial speed logs today. However, the first ADCPs incorporated analog-to-digital signal conversion over a narrow communication bandwidth. Around 1990, this technique was developed into broadband signal processing. Since then, broadband ADCPs have been able to generate very accurate, real-time velocity measurements.</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_bee7">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>CTD</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>CTD</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>Conductivity-Temperature-Depth probe</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_bef8">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>CTD - moored CTD</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>CTD - moored CTD</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>CTD - moored CTD</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_bee5">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>current meter</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>current meter</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>current meter</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_befb">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>meteorological sensor</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>meteorological sensor</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>Any meteorological sensor, but also see specific instruments such as aerovane, anemometer, etc.</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:platform>
        <gmi:MI_Platform id="plat_b4ea">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>moorings</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:description>
            <gco:CharacterString>entry created as MOORINGS OF UNITED STATES, but has been used as a generic MOORINGS entry.</gco:CharacterString>
          </gmi:description>
          <gmi:instrument gco:nilReason="missing" />
        </gmi:MI_Platform>
      </gmi:platform>
    </gmi:MI_AcquisitionInformation>
  </gmi:acquisitionInformation>
</gmi:MI_Metadata>