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    • NOAA GOES-R Series Geostationary Lightning Mapper (GLM) Level 2 Lightning Detection: Events, Groups, and Flashes

    Metadata Updated: November 2, 2023

    The Geostationary Lightning Mapper Level 2 Lightning Detection product contains a list of lightning flashes, and their constituent groups and events. The definition of and relationship among flashes, groups, and events are governed by the following spatial and temporal characteristics: An event represents the signal detected from the cloud top associated with a lightning emission in an individual sensor pixel for a 2ms integration period; A group represents the events detected in adjacent sensor pixels for the same integration period as an event; A flash represents a series of measurements constrained by temporal and spatial extent thresholds that are associated with one or more groups. The parent, child relationship among specific flashes, groups, and events is stored in the product. Data for each flash includes an energy-weighted centroid latitude, longitude location, time span of occurrence, amount of radiant energy, and coverage area. Data for each group includes an energy-weighted centroid latitude, longitude location, mean time of occurrence, amount of radiant energy, and coverage area. Data for each event includes a latitude, longitude location, time of occurrence, and amount of radiant energy. The product includes data quality information for each flash and group. A Lightning Detection product file contains a set of flashes, and its constituent groups and events for a 20 second period. The units of measure for the flash, group, and event radiant energy values is Joules. The units of measure for the flash and group coverage areas is square meters.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date October 19, 2023
    Metadata Created Date October 28, 2022
    Metadata Updated Date November 2, 2023
    Reference Date(s) January 19, 2018 (publication)
    Frequency Of Update continual

    Metadata Source

    Harvested from ncdc

    Other Data Resources

    Graphic Preview

    Example display of GLM proxy lightning data centered over the Sterling, Virginia NWS office.

    Additional Metadata

    Resource Type Dataset
    Metadata Date October 19, 2023
    Metadata Created Date October 28, 2022
    Metadata Updated Date November 2, 2023
    Reference Date(s) January 19, 2018 (publication)
    Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Contact Email
    Guid gov.noaa.ncdc:C01527
    Access Constraints Cite as: GOES-R Algorithm Working Group and GOES-R Series Program, (2018): NOAA GOES-R Series Geostationary Lightning Mapper (GLM) Level 2 Lightning Detection: Events, Groups, and Flashes. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5KH0KK6. [access date]., 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., 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.
    Bbox East Long -8.44
    Bbox North Lat 66.56
    Bbox South Lat -66.56
    Bbox West Long -141.56
    Coupled Resource
    Frequency Of Update continual
    Graphic Preview Description Example display of GLM proxy lightning data centered over the Sterling, Virginia NWS office.
    Graphic Preview File https://www.ncei.noaa.gov/pub/data/metadata/images/C01527.jpg
    Graphic Preview Type JPEG
    Harvest Object Id 6279826f-1339-458b-ada3-cef356638bba
    Harvest Source Id 2cb3ef77-1683-4c2a-9119-dc65e50917c6
    Harvest Source Title ncdc
    Licence For a list of use limitations of this dataset, see the product README and Algorithm Theoretical Basis Document (ATBD).
    Lineage The data were produced by the NOAA Office of Satellite and Product Operations (OSPO) and are archived at the NOAA National Centers for Environmental Information (NCEI).
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-141.56, -66.56], [-8.44, -66.56], [-8.44, 66.56], [-141.56, 66.56], [-141.56, -66.56]]]}
    Progress onGoing
    Spatial Data Service Type
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2017-07-05

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