NOAA NEXt-Generation RADar (NEXRAD) Products


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        citation:  (CI_Citation)
            title:  NOAA NEXt-Generation RADar (NEXRAD) Products
            alternateTitle:  National Geospatial Data Asset (NGDA) NEXRAD (NEXt-Generation RADar) Products
            date:  (CI_Date)
                date:  1992
                dateType:  (CI_DateTypeCode) publication
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                code:  NCEI DSI 7000
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                code:  NCEI DSI 6500
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                organisationName:  DOC/NOAA/NWS/ROC > Radar Operations Center, National Weather Service, NOAA, U.S. Department of Commerce
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                        deliveryPoint:  1200 Westheimer Drive
                        deliveryPoint:  Radar Operations Center, NOAA/NWS
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                        name:  NEXRAD Level III Landing page
                        description:  Level-III NEXRAD data are 40+ products generated from NEXRAD Level-II data using computer algorithms at the radar sites and include base and composite reflectivity, precipitation estimates, storm relative velocity, vertical integrated liquid, hail index, tornadic vortex signature, mesocyclone identification, and echo tops along with the dual-polarization measurements of differential reflectivity, correlation coefficient and specific differential phase, hydrometer classification, and melting layer data.
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                        linkage: https://www.ncdc.noaa.gov/data-access/radar-data/nexrad
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                        name:  NCEI NEXRAD page
                        description:  Informational resources for NEXRAD Radar Data.
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        abstract:  This dataset consists of Level III weather radar products 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. During 2008, the WSR-88D radars were upgraded to produce increased spatial resolution data, called Super Resolution. The earlier Legacy Resolution data 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. The NEXRAD products are divided in two data processing levels. The lower Level II data are base products at original resolution. 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 III products. The Level III data consists of reduced resolution, low-bandwidth, base products as well as many derived, post-processed products. Level III products are recorded at most U.S. sites, though non-US sites do not have Level III products. There are over 40 Level III products available from the NCDC. General products for Level III include the base and composite reflectivity, storm relative velocity, vertical integrated liquid, echo tops and VAD wind profile. Precipitation products for Level III include estimated ground accumulated rainfall amounts for one and three hour periods, storm totals, and digital arrays. Estimates are based on reflectivity to rainfall rate (Z-R) relationships. Overlay products for Level III are alphanumeric data that give detailed information on certain parameters for an identified storm cell. These include storm structure, hail index, mesocyclone identification, tornadic vortex signature, and storm tracking information. Radar messages for Level III are sent by the radar site to users in order to know more about the radar status and special product data. NEXRAD data are provided to the NOAA National Climatic Data Center for archiving and dissemination to users. Data coverage varies by station and ranges from May 1992 to 1 day from present. Most stations began observing in the mid-1990s, and most period of records are continuous.
        purpose:  NEXRAD Level III products are used to remotely detect atmospheric features, such as precipitation, precipitation-type, storms, turbulence and wind, for operational forecasting and data research analysis.
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            fileName: https://www1.ncdc.noaa.gov/pub/data/metadata/images/C00708_fdr_baserefl.jpg
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            keyword:  Earth Science > Spectral/Engineering > Radar > Doppler Velocity
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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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                    date:  2016-01
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                            name:  Part A - System Concepts, Responsibilities, and Procedures
                            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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                    date:  2005-12
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                    code:  FCM-H11B-2005
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                            linkage: https://www.ofcm.gov/publications/fmh/FMH11/fmh-11B-2005.pdf
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                            name:  Part B - Doppler Radar Theory and Meteorology
                            description:  Document provides a background in doppler radar 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
                    dateType:  (CI_DateTypeCode) publication
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                    code:  FCM-H11C-2017
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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.
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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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                            linkage: https://www.ofcm.gov/publications/fmh/FMH11/FMH11D-2006.pdf
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                            name:  Part D - WSR-88D Unit Description and Operational Applications
                            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
                    issueIdentification:  Issue 9, pp. 1669-1687
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                title:  History of Operational Use of Weather Radar by U.S. Weather Services. Part I: The Pre-NEXRAD Era
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                    date:  1998-06
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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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                    name:  Weather and Forecasting, Volume 13
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                  TimePeriod:
                    beginPosition:  1992-05-07
                    endPosition:
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    contentInfo:  (MI_CoverageDescription)
        attributeDescription:
          RecordType:  General Meteorological Products: General products include the baseline reflectivity and velocity, and also algorithmic graphic products spectrum width, vertical integrated liquid, and VAD wind profile.
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        dimension:  (MD_Band)
            sequenceIdentifier:
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                aName:  Base Reflectivity
                attributeType: (unknown)
            descriptor:  A display of echo intensity measured in dBZ. This product is used to detect precipitation, evaluate storm structure, locate boundaries and determine hail potential. The 4 lowest elevations angles are available.
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              Real:  95
            minValue:
              Real:  -30
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                name:  dBZ
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            sequenceIdentifier:
              MemberName:
                aName:  Base Velocity
                attributeType: (unknown)
            descriptor:  A measure of the radial component of the wind either toward the radar (negative values) or away from the radar (positive values). Negative values are represented by cool colors (green) while positive values are represented by warm colors (red). This product is used to estimate wind speed and direction, locate boundaries, locate severe weather signatures and identify suspected areas of turbulence.
            maxValue:
              Real:  100
            minValue:
              Real:  -100
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                identifier:  knots
                name:  knots
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  Composite Reflectivity
                attributeType: (unknown)
            descriptor:  A display of maximum reflectivity for the total volume within the range of the radar. This product is used to reveal the highest reflectivities in all echoes, examine storm structure features and determine intensity of storms.
            maxValue:
              Real:  75
            minValue:
              Real:  -32
            units:
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                identifier:  dbz
                name:  dbz
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  Layer Composite Reflectivity
                attributeType: (unknown)
            descriptor:  A display of maximum reflectivity for three different height ranges within the volume scan. This product is used to reveal the highest reflectivities in all echoes, examine storm structure features and determine intensity of storms.
            maxValue:
              Real:  75
            minValue:
              Real:  -32
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                identifier:  dbz
                name:  dbz
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                aName:  Storm Relative Veolicty
                attributeType: (unknown)
            descriptor:  When the motion of storms are subtracted from the wind field, the result is a picture of the wind as if the storms were stationary. Color induces are the same as base velocity. Comparing the storm relative motion image with base velocity image helps identify the rotating storm.
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              Real:  100
            minValue:
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                name:  knots
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                aName:  Echo Tops
                attributeType: (unknown)
            descriptor:  An image of the echo top heights color coded in user-defined increments. This product is used for a quick estimation of the most intense convection and higher echo tops, as an aid in identification of storm structure features and for pilot briefing purposes.
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                aName:  Vertical Integrated Liquid
                attributeType: (unknown)
            descriptor:  The water content of a 2.2 X 2.2 nmi column of air which is color coded and plotted on a 124 nmi map. This product is used as an effective hail indicator, to locate most significant storms and to identify areas of heavy rainfall.
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              Real:  0
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                identifier:  kg/m**2
                name:  kg/m**2
        dimension:  (MD_Band)
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                aName:  VAD Wind Profile
                attributeType: (unknown)
            descriptor:  A graphic display of wind barbs plotted on a height staff in 500 ft or 1000 ft increments. The current (far right) and up to 10 previous plots may be displayed simultaneously. This product is an excellent tool for meteorologists in weather forecasting, severe weather and aviation.
            units: (missing)
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        attributeDescription:
          RecordType:  Hydrometeorological Products: Precipitation products are estimated ground accumulated rainfall. Estimates are based off a reflectivity and rainfall rate relationship called Z-R.
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            sequenceIdentifier:
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                aName:  One Hour Precipitation
                attributeType: (unknown)
            descriptor:  A display of estimated one hour precipitation accumulation on a 1.1 X 1.1 nmi grid. This product is used to assess rainfall intensities for flash flood warnings, urban flood statements and special weather statements.
            maxValue:
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            minValue:
              Real:  0
            units:
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                identifier:  inches
                name:  inches
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                aName:  Three Hour Precipitation
                attributeType: (unknown)
            descriptor:  A display of estimated three hour precipitation accumulation on a 1.1 X 1.1 nmi grid. This product is used to assess rainfall intensities for flash flood warnings, urban flood statements and special weather statements.
            maxValue:
              Real:  50
            minValue:
              Real:  0
            units:
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                identifier:  inches
                name:  inches
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            sequenceIdentifier:
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                aName:  Storm Total Precipitation
                attributeType: (unknown)
            descriptor:  A map of estimated storm total precipitation accumulation continuously updated since the last one-hour break. This product is used to locate flood potential over urban or rural areas, estimate total basin runoff and provide rainfall data 24 hours a day.
            maxValue:
              Real:  50
            minValue:
              Real:  0
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                identifier:  inches
                name:  inches
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                aName:  Digital Precipitation Array
                attributeType: (unknown)
            descriptor:  An array format of estimated one hour precipitation accumulations on the 1/4 LFM (4.7625 km HRAP) grid. This is a 8 bit product with 255 possible precip values. This product is used to assess rainfall intensities for flash flood warnings, urban flood statements and special weather statements.
            maxValue:
              Real:  50
            minValue:
              Real:  0
            units:
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                identifier:  inches
                name:  inches
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    contentInfo:  (MI_CoverageDescription)
        attributeDescription:
          RecordType:  Storm Overlay Products: Overlay products are alphanumeric data that gives detailed information on certain parameters for an identified storm cell.
        contentType: (unknown)
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Storm Structure
            definition:  A table displaying information on storm attributes which include maximum reflectivity, maximum velocity at lowest elevation angle, storm overhang, mass weighted storm volume, storm area base and top, storm position and storm tilt.
            rangeElement:
              Record:  Alphanumeric values: Product is alphanumeric.
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Hail Index
            definition:  A product designed to locate storms which have the potential to produce hail. Hail potential is labeled as either probable (hollow green triangle) or positive (filled green triangle). Probable means the storm is probably producing hail and positive means the storm is producing hail.
            rangeElement:
              Record:  Alphanumeric values: Product is alphanumeric.
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Mesocyclone
            definition:  This product is designed to display information regarding the existence and nature of rotations associated with thunderstorms. Numerical output includes azimuth, range, and height of the mesocyclone.
            rangeElement:
              Record:  Alphanumeric values: Product is alphanumeric.
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Tornadic Vortex Signature
            definition:  A product which shows an intense gate to gate azimuthal shear associated with tornadic- scale rotation. It is depicted by a red triangle with numerical output of location and height.
            rangeElement:
              Record:  Alphanumeric values: Product is alphanumeric.
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Storm Tracking Information
            definition:  A product which shows a plot of the past hours movement, current location, and forecast movement for the next hour or less for each identified thunderstorm cell. This product is used to determine reliable storm movement.
            rangeElement:
              Record:  Alphanumeric values: Product is alphanumeric.
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    contentInfo:  (MI_CoverageDescription)
        attributeDescription:
          RecordType:  Radar Messages: Radar messages are sent by the radar site to users in order to know more about the radar status and special product data.
        contentType: (unknown)
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  General Status Message
            definition:  A text message describing the status of the Radar site. A reason may be provided if the Radar is not transmitting.
            rangeElement:
              Record:  Alphanumeric Text: Message contains alphanumeric text.
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Radar Coded Message
            definition:  A three part message containing a tabular listing of composite reflectivity data, a vertical wind profile derived from the VAD algorithm and the locations of algorithm produced severe weather features such as the Hail Index (HI) and the Tornado Vortex Signature (TVS).
            rangeElement:
              Record:  Alphanumeric Text: Message contains alphanumeric text.
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Radar Outage Notification
            definition:  Notification message of radar outage.
            rangeElement:
              Record:  Alphanumeric Text: Message contains alphanumeric text.
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Interim Radar Message
            definition:  Notification message of radar outage.
            rangeElement:
              Record:  Alphanumeric Text: Message contains alphanumeric text.
        rangeElementDescription:  (MI_RangeElementDescription)
            name:  Radar Coded Message
            definition:  The Radar Coded Message product (RCM) is based on grid squares approximately 10 km on a side. It is composed of three parts preceded by a communications header.
            rangeElement:
              Record:  Part A: Reflectivity is produced automatically and is presented to the user as a tabular listing of alphanumerics.
            rangeElement:
              Record:  Part B: Velocity Azimuth Display is also produced automatically and is presented to the user as an alphanumeric message.
            rangeElement:
              Record:  Part C: Remarks, consists of automatically provided information that can be augmented at the option of the user. The automatically produced portion of Part C is presented to the user as an alphanumeric message.
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    contentInfo:  (MD_FeatureCatalogueDescription)
        includedWithDataset: (missing)
        featureCatalogueCitation:  (CI_Citation)
            title:  Entity and Attribute Overview: http://www1.ncdc.noaa.gov/pub/data/documentlibrary/tddoc/td7000.pdf
            date: (inapplicable)
            otherCitationDetails:  Entity and Attribute Detail Citation: none
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    contentInfo:  (MD_ImageDescription)
        attributeDescription: (inapplicable)
        contentType: (inapplicable)
        processingLevelCode:  (MD_Identifier)
            authority:  (CI_Citation)
                title:  Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata - Appendix B, NOAA Data Product Levels
                date:  (CI_Date)
                    date:  2002-10-09
                    dateType:  (CI_DateTypeCode) publication
                edition:  FGDC-STD-012-2002
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Federal Geographic Data Committee Secretariat c/o U.S. Geological Survey
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            deliveryPoint:  590 National Center
                            city:  Reston
                            administrativeArea:  VA
                            postalCode:  20192
                    role:  (CI_RoleCode) publisher
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Standards Working Group, Federal Geographic Data Committee
                    role:  (CI_RoleCode) originator
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName: (missing)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: https://www.fgdc.gov/standards/projects/FGDC-standards-projects/csdgm_rs_ex/MetadataRemoteSensingExtens.pdf
                            applicationProfile:  Information
                            name:  Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata, FGDC-STD-012-2002
                            description:  The purpose of this standard is to provide extensions to the Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata for describing geospatial data obtained from remote sensing.
                            function:  (CI_OnLineFunctionCode) information
                    role: (inapplicable)
            code:  Level 3
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    distributionInfo:  (MD_Distribution)
        distributionFormat:  (MD_Format)
            name:  Native Binary
            version: (missing)
            specification:  See available software to visualize and decode the radar data format: http://www.ncdc.noaa.gov/data-access/radar-data/radar-display-tools
            fileDecompressionTechnique:  Unix Zip (.Z) or gzip (.gz) compression and tape archive (.tar) may be applied to data files retreived from the NCDC archive.
        distributionFormat:  (MD_Format)
            name:  ArcGIS
            version: (missing)
        distributionFormat:  (MD_Format)
            name:  KMZ
            version: (missing)
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
                positionName:  Customer Engagement Branch
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  1-828-271-4800
                        facsimile:  1-828-271-4876
                    address:  (CI_Address)
                        deliveryPoint:  151 Patton Avenue
                        deliveryPoint:  Veach-Baley Federal Building, Room 468
                        city:  Asheville
                        administrativeArea:  NC
                        postalCode:  28801-5001
                        country:  USA
                        electronicMailAddress:  ncei.orders@noaa.gov
                    onlineResource:  (CI_OnlineResource)
                        linkage: https://www.ncei.noaa.gov
                        protocol:  HTTPS
                        applicationProfile:  Web Browser
                        name:  NOAA National Centers for Environmental Information (NCEI)
                        description:  NCEI home page with information, data access and contact information.
                        function:  (CI_OnLineFunctionCode) information
                    hoursOfService:  8:00 - 6:00 Eastern
                role:  (CI_RoleCode) distributor
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
        transferOptions:  (MD_DigitalTransferOptions)
            onLine:  (CI_OnlineResource)
                linkage: https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ncdc:C00682
                protocol:  HTTPS
                applicationProfile:  Description
                name:  NOAA NEXt-Generation RADar (NEXRAD) Products Landing Page
                description:  Dataset landing page with general information and access links for the dataset.
                function:  (CI_OnLineFunctionCode) information
            onLine:  (CI_OnlineResource)
                linkage: https://aws.amazon.com/noaa-big-data/nexrad/
                protocol:  HTTPS
                applicationProfile:  Web Browser
                name:  NEXRAD on Amazon Web Service (AWS)
                description:  Amazon documentation for accessing the complete NEXRAD Level II archive on AWS S3 cloud storage.
                function:  (CI_OnLineFunctionCode) information
            onLine:  (CI_OnlineResource)
                linkage: https://noaa-nexrad-level2.s3.amazonaws.com/
                protocol:  HTTPS
                applicationProfile:  Download
                name:  Amazon S3 bucket
                description:  NEXRAD Level II archive data is hosted in the "noaa-nexrad-level2" Amazon S3 bucket.
                function:  (CI_OnLineFunctionCode) download
            onLine:  (CI_OnlineResource)
                linkage: https://s3.amazonaws.com/noaa-nexrad-level2/index.html
                protocol:  HTTPS
                applicationProfile:  Download
                name:  AWS JavaScript S3 Explorer
                description:  Browse the contents of the NEXRAD Level II archive via the AWS JavaScript S3 Explorer.
                function:  (CI_OnLineFunctionCode) download
            onLine:  (CI_OnlineResource)
                linkage: https://www.opensciencedatacloud.org/publicdata/noaa-nexrad-l2/#search-service
                protocol:  HTTPS
                applicationProfile:  Data Search Application
                name:  OCC Environmental Data Commons
                description:  Service to search space and time for NEXRAD level II data of interest. This search service will return persistent digital identifiers for accessing data from given NEXRAD stations and date ranges.
                function:  (CI_OnLineFunctionCode) search
            onLine:  (CI_OnlineResource)
                linkage: https://www.ncdc.noaa.gov/cdo-web/search?datasetid=NEXRAD2
                protocol:  HTTPS
                applicationProfile:  Data Search Application
                name:  NCEI Climate Data Online Search Tool
                description:  Search for data and metadata by station ID, location, and date range via a text-based interface.
                function:  (CI_OnLineFunctionCode) search
            onLine:  (CI_OnlineResource)
                linkage: https://www.ncdc.noaa.gov/cdo-web/search?datasetid=NEXRAD3
                protocol:  HTTPS
                applicationProfile:  Data Search Application
                name:  NCEI Climate Data Online Search Tool
                description:  Search for data and metadata by station ID, location, and date range via a text-based interface.
                function:  (CI_OnLineFunctionCode) search
            onLine:  (CI_OnlineResource)
                linkage: https://gis.ncdc.noaa.gov/maps/ncei/radar/radar
                protocol:  HTTPS
                applicationProfile:  Map Search Application
                name:  NCEI GIS Map Viewer
                description:  Dynamic GIS mapping application to locate stations and data for selected layers.
                function:  (CI_OnLineFunctionCode) search
            onLine:  (CI_OnlineResource)
                linkage: https://www.ncdc.noaa.gov/nexradinv/
                protocol:  HTTPS
                applicationProfile:  Web Browser
                name:  NCEI NEXRAD Data Inventory Search
                description:  Search for radar data and estimated VCP mode by station ID, location, and date via a text-based interface.
                function:  (CI_OnLineFunctionCode) search
            onLine:  (CI_OnlineResource)
                linkage: https://gis.ncdc.noaa.gov/arcgis/rest/services/cdo/nexrad/MapServer
                protocol:  HTTPS
                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: http://opengis.net/spec/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: http://opengis.net/spec/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: http://opengis.net/spec/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 III products were collected by the NOAA National Weather Service (NWS) and are archived at the NOAA National Climatic Data Center (NCDC).
            processStep:  (LE_ProcessStep)
                description:  Level II data are the three meteorological base data quantities: reflectivity, mean radial velocity, and spectrum width. From these Level II data, computer processors generate numerous meteorological analysis Level III products based on the Level III product algorithms. Level II data are recorded at all NWS and several select CONUS DOD WSR-88D sites. Level III products are recorded at all U.S. sites. The data are sent to the National Climatic Data Center for archiving and dissemination.
                dateTime: (unknown)
                processor:  (CI_ResponsibleParty)
                    organisationName:  DOC/NOAA/NWS/ROC
                    positionName:  Primary Algorithm Product Lead
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            deliveryPoint:  Radar Operations Center
                            city:  Norman
                            administrativeArea:  Oklahoma
                            country:  USA
                    role:  (CI_RoleCode) processor
                source:  #Level_II
                output:  #Level_III
            source:  (LI_Source)
                description:  Source Contribution: The Level II data are used in processing Level III data. Source Type: digital
                sourceCitation:  (CI_Citation)
                    title:  NWS WSR-88D Next Generation Radar (NEXRAD) Level II
                    date:  (CI_Date)
                        date:  1988
                        dateType:  (CI_DateTypeCode) publication
                    identifier:  (MD_Identifier)
                        code:  gov.noaa.ncdc:C00345
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:  DOC/NOAA/NWS > National Weather Service, NOAA, U.S. Department of Commerce
                        contactInfo:  (CI_Contact)
                            address:  (CI_Address)
                                deliveryPoint:  National Oceanic and Atmospheric Administration National Weather Service 1325 East West Highway
                                city:  Silver Spring
                                administrativeArea:  MD
                                postalCode:  20910
                                country:  USA
                        role:  (CI_RoleCode) originator
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName: (missing)
                        contactInfo:  (CI_Contact)
                            onlineResource:  (CI_OnlineResource)
                                linkage: https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ncdc:C00345
                                protocol:  HTTPS
                                applicationProfile:  Web Browser
                                name:  NWS Next Generation RADar (NEXRAD) Level II Data
                                description:  NEXRAD Level II data information page.
                                function:  (CI_OnLineFunctionCode) information
                        role: (missing)
                sourceExtent:  (EX_Extent)
                    temporalElement:  (EX_TemporalExtent)
                        extent:
                          TimePeriod:
                            beginPosition:  1992-05-07
                            endPosition:
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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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    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)