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          <gmd:thesaurusName xlink:title="GCMD Instrument Keywords">
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                  <gmd:date>
                    <gco:Date>2020-01-09</gco:Date>
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                        <gmd:CI_OnlineResource>
                          <gmd:linkage>
                            <gmd:URL>https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords</gmd:URL>
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                          <gmd:name>
                            <gco:CharacterString>Global Change Master Directory (GCMD) Keywords</gco:CharacterString>
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                            <gco:CharacterString>The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.</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: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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          <gmd:thesaurusName xlink:title="GCMD Data Center Keywords">
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                    <gco:Date>2020-01-09</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="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.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords</gmd:URL>
                          </gmd:linkage>
                          <gmd:name>
                            <gco:CharacterString>Global Change Master Directory (GCMD) Keywords</gco:CharacterString>
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                          <gmd:description>
                            <gco:CharacterString>The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.</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:role>
                    <gmd:CI_RoleCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode>
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        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:resourceConstraints xlink:title="NCEI Data Citation Statement">
        <gmd:MD_LegalConstraints>
          <gmd:useLimitation>
            <gco:CharacterString>otherRestrictions</gco:CharacterString>
          </gmd:useLimitation>
          <gmd:otherConstraints>
            <gco:CharacterString>Cite as: NOAA National Centers for Environmental Information. 2017. Passive Acoustic Data Collection. NOAA National Centers for Environmental Information. https://doi.org/10.25921/PF0H-SQ72 [access date].</gco:CharacterString>
          </gmd:otherConstraints>
        </gmd:MD_LegalConstraints>
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      <gmd:resourceConstraints xlink:title="Distribution Liability">
        <gmd:MD_LegalConstraints uuid="dadd4ac3-2b9f-4db5-8603-71285b94c3d7">
          <gmd:accessConstraints>
            <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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            <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: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>
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      <gmd:language>
        <gco:CharacterString>eng; USA</gco:CharacterString>
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      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>biota</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>oceans</gmd:MD_TopicCategoryCode>
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            <gmd:EX_GeographicBoundingBox id="boundingGeographicBoundingBox">
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                <gco:Decimal>-180</gco:Decimal>
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                <gco:Decimal>-90</gco:Decimal>
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              <gmd:northBoundLatitude>
                <gco:Decimal>90</gco:Decimal>
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            <gmd:EX_TemporalExtent id="boundingTemporalExtent">
              <gmd:extent>
                <gml:TimePeriod gml:id="time_span">
                  <gml:beginPosition>2017-02-13T00:00:00</gml:beginPosition>
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    </gmd:MD_DataIdentification>
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    <gmd:MD_Distribution>
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          <gmd:name>
            <gco:CharacterString>raw audio files</gco:CharacterString>
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          <gmd:version>
            <gco:CharacterString>1</gco:CharacterString>
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          <gmd:specification>
            <gco:CharacterString>Raw audio files produced from data collected by a passive acoustic recording system. File format is one of the standard audio file formats (.wav, .aif, .flac, etc.)</gco:CharacterString>
          </gmd:specification>
        </gmd:MD_Format>
      </gmd:distributionFormat>
      <gmd:distributor>
        <gmd:MD_Distributor>
          <gmd:distributorContact xlink:title="NCEI (distributor)">
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                    <gmd:CI_Address>
                      <gmd:electronicMailAddress>
                        <gco:CharacterString>ncei.info@noaa.gov</gco:CharacterString>
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                  </gmd:address>
                  <gmd:onlineResource>
                    <gmd:CI_OnlineResource>
                      <gmd:linkage>
                        <gmd:URL>https://www.ncei.noaa.gov/contact</gmd:URL>
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                      <gmd:name>
                        <gco:CharacterString>NCEI Contact Information</gco:CharacterString>
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                      <gmd:description>
                        <gco:CharacterString>Information for contacts at NCEI.</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:role>
                <gmd:CI_RoleCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="distributor">distributor</gmd:CI_RoleCode>
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                <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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                <gco:CharacterString>Contact NCEI for other distribution options and instructions.</gco:CharacterString>
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            <gmd:MD_Format>
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                <gco:CharacterString>raw audio files</gco:CharacterString>
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              <gmd:version gco:nilReason="inapplicable" />
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                <gco:CharacterString>Raw audio files produced from data collected by a passive acoustic recording system. File format is one of the standard audio file formats (.wav, .aif, .flac, etc.)</gco:CharacterString>
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          <gmd:distributorTransferOptions>
            <gmd:MD_DigitalTransferOptions>
              <gmd:onLine>
                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>https://doi.org/10.25921/PF0H-SQ72</gmd:URL>
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                  <gmd:name>
                    <gco:CharacterString>Metadata Landing Page</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:distributorTransferOptions>
            <gmd:MD_DigitalTransferOptions>
              <gmd:onLine>
                <gmd:CI_OnlineResource>
                  <gmd:linkage>
                    <gmd:URL>https://www.ngdc.noaa.gov/mgg/pad/</gmd:URL>
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                  <gmd:name>
                    <gco:CharacterString>Passive Acoustic Data Site</gco:CharacterString>
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                  <gmd:description>
                    <gco:CharacterString>NCEI site providing more information on the passive acoustic data archive.</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:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
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                <gco:CharacterString>Passive acoustic Data Map Viewer</gco:CharacterString>
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                <gco:CharacterString>Interactive map viewer to allow discovery and access to passive acoustic data</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="search">search</gmd:CI_OnLineFunctionCode>
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      <gmd:report>
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            <gco:CharacterString>All data were collected with standardized and calibrated acoustic recording equipment. Data quality was assessed through visual analysis and examination of acoustic levels over time across all frequencies.</gco:CharacterString>
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              <gmd:description>
                <gco:CharacterString>The primary data in this collection consists of raw unprocessed passive acoustic data files that were submitted to NCEI for archive. In addition, ancillary files are also included if provided. When possible, checksum values are compared to verify file integrity before being added to the archive. No other processing or quality control steps are applied to the data.</gco:CharacterString>
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        <gmd:MD_MaintenanceFrequencyCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded">asNeeded</gmd:MD_MaintenanceFrequencyCode>
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      <gmd:maintenanceNote>
        <gco:CharacterString>Based on the NCEI Collection Level Metadata Template v1.1 (https://data.noaa.gov/waf/templates/iso_u/xml/ncei_template-clean.xml).</gco:CharacterString>
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  <gmi:acquisitionInformation>
    <gmi:MI_AcquisitionInformation>
      <gmi:platform>
        <gmi:MI_Platform>
          <gmi:identifier>
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              <gmd:code>
                <gco:CharacterString>Various fixed and mobile platforms depending on dataset within collection</gco:CharacterString>
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          </gmi:identifier>
          <gmi:description>
            <gco:CharacterString>Self-contained underwater sound recorder for long term ocean deployments.</gco:CharacterString>
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          <gmi:instrument>
            <gmi:MI_Instrument>
              <gmi:identifier gco:nilReason="inapplicable" />
              <gmi:type>
                <gco:CharacterString>Various recorders capable of collecting passive acoustic data</gco:CharacterString>
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