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NOAA Next Generation Radar (NEXRAD) Level 2 Base Data


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            title:  NOAA Next Generation Radar (NEXRAD) Level 2 Base Data
            alternateTitle:  Weather Radar (Level II)
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                date:  1991
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                  Anchor:  DOI doi:10.7289/V5W9574V
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                code:  gov.noaa.ncdc:C00345
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        abstract:  This dataset consists of Level II weather radar data collected from Next-Generation Radar (NEXRAD) stations located in the contiguous United States, Alaska, Hawaii, U.S. territories and at military base sites. NEXRAD is a network of 160 high-resolution Doppler weather radars operated by the NOAA National Weather Service (NWS), the Federal Aviation Administration (FAA), and the U.S. Air Force (USAF). Doppler radars detect atmospheric precipitation and winds, which allow scientists to track and anticipate weather events, such as rain, ice pellets, snow, hail, and tornadoes, as well as some non-weather objects like birds and insects. NEXRAD stations use the Weather Surveillance Radar - 1988, Doppler (WSR-88D) system. This is a 10 cm wavelength (S-Band) radar that operates at a frequency between 2,700 and 3,000 MHz. The radar system operates in two basic modes: a slow-scanning Clear Air Mode (Mode B) for analyzing air movements when there is little or no precipitation activity in the area, and a Precipitation Mode (Mode A) with a faster scan for tracking active weather. The two modes employ nine Volume Coverage Patterns (VCPs) to adequately sample the atmosphere based on weather conditions. A VCP is a series of 360 degree sweeps of the antenna at pre-determined elevation angles and pulse repetition frequencies completed in a specified period of time. The radar scan times 4.5, 5, 6 or 10 minutes depending on the selected VCP. The NEXRAD products are divided into multiple data processing levels. The lower Level II data contain the three meteorological base data quantities at original resolution: reflectivity, mean radial velocity, and spectrum width. With the advent of dual polarization beginning in 2011, additional base products of differential reflectivity, correlation coefficient and differential phase are available. Level II data are recorded at all NWS and most USAF and FAA WSR-88D sites. From the Level II quantities, computer processing generates numerous meteorological analysis Level 3 products. NEXRAD data are acquired by the NOAA National Centers for Environmental Information (NCEI) for archiving and dissemination to users. Data coverage varies by station and ranges from June 1991 to 1 day from present. Most stations began observing in the mid-1990s, and most period of records are continuous.
        purpose:  Level-2 NEXRAD data include three meteorological base data quantities: reflectivity, mean radial velocity, and spectrum width. With the advent of dual polarization beginning in 2011, additional base products of differential reflectivity, correlation coefficient and differential phase are available.
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            keyword:  Earth Science > Spectral/Engineering > Radar > Spectrum Width
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            otherConstraints:  Cite as: NOAA National Weather Service (NWS) Radar Operations Center (1991): NOAA Next Generation Radar (NEXRAD) Level 2 Base Data. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5W9574V [access date].
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            otherConstraints:  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.
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            otherConstraints:  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.
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                title:  NEXRAD WSR-88D Interface Control Documents
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                title:  Federal Meteorological Handbook No. 11 - Doppler Radar Meteorological Observations, Part A - System Concepts, Responsibilities, and Procedures
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                            description:  Document includes WSR-88D system concepts, terminology and acronyms.
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                title:  Federal Meteorological Handbook No. 11 - Doppler Radar Meteorological Observations, Part B - Doppler Radar Theory and Meteorology
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                title:  Federal Meteorological Handbook No. 11 - Doppler Radar Meteorological Observations, Part C - WSR-88D Products and Algorithms
                date:  (CI_Date)
                    date:  2017-10
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                            linkage: https://www.ofcm.gov/publications/fmh/FMH11/fmh11partC.pdf
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                            name:  Part C - WSR-88D Products and Algorithms
                            description:  Document provides a full description of the WSR-88D meteorological and hydrological products and algorithms.
                            function:  (CI_OnLineFunctionCode) download
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                title:  Federal Meteorological Handbook No. 11 - Doppler Radar Meteorological Observations, Part D - WSR-88D Unit Description and Operational Applications
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                    date:  2006-02
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                            description:  Document provides an overview of unit operations and functional flow and insights into the meteorological applications of the WSR-88D.
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                title:  The WSR-88D and the WSR-88D Operational Support Facility
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                    date:  1993-09
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                            name:  The WSR-88D and the WSR-88D Operational Support Facility
                            description:  AMS Journal Publication.
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                    name:  Bulletin of the American Meteorological Society, Volume 74
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                    date:  1998-06
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                    organisationName:  Harbuck, A.C.
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                            name:  History of Operational Use of Weather Radar by U.S. Weather Services. Part I: The Pre-NEXRAD Era
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                    name:  Weather and Forecasting, Volume 13
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                title:  History of Operational Use of Weather Radar by U.S. Weather Services. Part II: Development of Operational Doppler Weather Radars
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                    date:  1998-06
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                    beginPosition:  1991-06-05
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        supplementalInformation:  During 2008, the WSR-88D radars were upgraded to produce increased spatial resolution data, called Super Resolution. The earlier (Legacy Resolution) data before 2008 provides radar reflectivity at 1.0 degree azimuthal by 1 km range gate resolution to a range of 460 km, and Doppler velocity and spectrum width at 1.0 degree azimuthal by 250 m range gate resolution to a range of 230 km. The upgraded Super Resolution data provides radar reflectivity at 0.5 degree azimuthal by 250 m range gate resolution to a range of 460 km, and Doppler velocity and spectrum width at 0.5 degree azimuthal by 250 m range gate resolution to a range of 300 km. Super resolution makes a compromise of slightly decreased noise reduction for a large gain in resolution. In 2010, the deployment of the Dual Polarization (Dual Pol) capability to NEXRAD sites began with the first operational Dual Pol radar in May 2011. Dual Pol radar capability adds vertical polarization to the previous horizontal radar waves, in order to more accurately discern the return signal. This allows the radar to better distinguish between types of precipitation (e.g., rain, hail and snow), improves rainfall estimates, improves data retrieval in mountainous terrain, and aids in removal of non-weather artifacts.
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                title:  Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata - Appendix B, NOAA Data Product Levels
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                            name:  Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata, FGDC-STD-012-2002
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            version: (missing)
            fileDecompressionTechnique:  Unix Zip (.Z), GNU zip (.gz), or Bzip2 compression, and tape archive (.tar) may be applied to data files retrieved from the NCEI archive.
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                        postalCode:  28801-5001
                        country:  USA
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                applicationProfile:  Web Browser
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                applicationProfile:  Download
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                name:  OCC Environmental Data Commons
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                linkage: https://www.ncdc.noaa.gov/nexradinv/
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                applicationProfile:  Web Browser
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                applicationProfile:  REST
                name:  NCEI NEXRAD Map Server
                description:  ArcGIS Server REST API for the dataset.
                function:  (CI_OnLineFunctionCode) download
            onLine:  (CI_OnlineResource)
                linkage: https://gis.ncdc.noaa.gov/arcgis/services/cdo/nexrad/MapServer/WMSServer?request=GetCapabilities&service=WMS
                protocol:  HTTPS
                applicationProfile:  WMS
                name:  NCEI NEXRAD WMS
                description:  Web Map Service for the dataset.
                function:  (CI_OnLineFunctionCode) download
            onLine:  (CI_OnlineResource)
                linkage: https://gis.ncdc.noaa.gov/arcgis/services/cdo/nexrad/MapServer/WFSServer?request=GetCapabilities&service=WFS
                protocol:  HTTPS
                applicationProfile:  WFS
                name:  NCEI NEXRAD WFS
                description:  Web Feature Service for the dataset.
                function:  (CI_OnLineFunctionCode) download
            onLine:  (CI_OnlineResource)
                linkage: https://gis.ncdc.noaa.gov/kml/nexrad.kmz
                protocol:  HTTPS
                applicationProfile:  KML
                name:  KMZ file for dataset
                description:  Direct download link for KMZ file.
                function:  (CI_OnLineFunctionCode) download
            onLine:  (CI_OnlineResource)
                linkage: https://www.ncdc.noaa.gov/data-access/radar-data/radar-display-tools
                protocol:  HTTPS
                applicationProfile:  Web Browser
                name:  NEXRAD Display and Conversion Tools
                description:  Information on free visualization, analysis, and decoding tools for the radar data format.
                function:  (CI_OnLineFunctionCode) information
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
            statement:  NEXRAD Level 2 data were collected by the NOAA National Weather Service (NWS) and are archived at the NOAA National Centers for Environmental Information (NCEI).
            processStep:  (LE_ProcessStep)
                description:  Radar signals are processed to Level 2 data at radar sites.
                dateTime: (unknown)
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) repository
            levelDescription:  (MD_ScopeDescription)
                other:  NOAA National Centers for Environmental Information
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
                dateTime:
                  DateTime:  2015-04-22T00:00:00
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
            levelDescription:  (MD_ScopeDescription)
                other:  Data Stewardship
        report:  (DQ_ConceptualConsistency)
            nameOfMeasure:  Data Stewardship Maturity Assessment
            measureIdentification:  (MD_Identifier)
                code:  MM-Stew
            measureDescription:  The Data Stewardship Maturity Matrix (DSMM) is a unified framework that defines criteria for each of nine components based on measurable practices, which can be used to apply a progressive, 6-level rating to an individual dataset, representing stewardship maturity stages rated as Not Assessed or Not Available (Level 0), adHoc (Level 1), minimum (Level 2), intermediate (Level 3), advanced (Level 4), and optimal (Level 5).
            evaluationMethodDescription:  Data Stewardship Maturity Assessment was evaluated by the metadata content editor for the NOAA OneStop project using the Scientific Data Stewardship Maturity Assessment Model Template v4.0.
            evaluationProcedure:  (CI_Citation)
                title:  The Scientific Data Stewardship Maturity Assessment Model Template
                date:  (CI_Date)
                    date:  2016-11-28
                    dateType:  (CI_DateTypeCode) publication
                edition:  NCDC-CICS-SMM_0001_Rev.1 v4.0 11/28/2016
                identifier:  (MD_Identifier)
                    code:
                      Anchor:  DOI link doi:10.10.6084/m9.figshare.1211954
                citedResponsibleParty:  (CI_ResponsibleParty)
                    individualName:  Peng, Ge
                    organisationName:  CICS-NC/NCEI
                    role:  (CI_RoleCode) author
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName: (inapplicable)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://doi.org/10.6084/m9.figshare.1211954
                            protocol:  HTTPS
                            applicationProfile:  Web Browser
                            name:  The Scientific Data Stewardship Maturity Assessment Model Template
                            description:  Landing page for quality evaluation procedure.
                            function:  (CI_OnLineFunctionCode) information
                    role: (inapplicable)
            dateTime:
              DateTime:  2016-11-28T00:00:00
            result:  (DQ_QuantitativeResult)
                valueUnit: (inapplicable)
                value:
                  Record:
                    CodeListValue:  intermediate
                value:
                  Record:
                    CodeListValue:  optimal
                value:
                  Record:
                    CodeListValue:  intermediate
                value:
                  Record:
                    CodeListValue:  optimal
                value:
                  Record:
                    CodeListValue:  optimal
                value:
                  Record:
                    CodeListValue:  advanced
                value:
                  Record:
                    CodeListValue:  advanced
                value:
                  Record:
                    CodeListValue:  advanced
                value:
                  Record:
                    CodeListValue:  intermediate
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) asNeeded
        maintenanceNote:  Bulk metadata change applied on 2018-11-05. See version control repository history for metadata change details.
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  NEXRAD > NEXt Generation RADar
            type: (missing)
        operation:  (MI_Operation)
            identifier:  (MD_Identifier)
                code:  NEXRAD > NEXt Generation Weather RADar
            status: (missing)
            parentOperation: (inapplicable)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  National Weather Service
            description: (missing)
            instrument: (missing)