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

The 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.

Data and Resources

Additional Info

Field Value
Last Updated October 9, 2019, 18:26
Created March 15, 2018, 14:35
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
contact-email ncei.sat.info@noaa.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2018-01-19"}]
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://www1.ncdc.noaa.gov/pub/data/metadata/images/C01527.jpg
graphic-preview-type JPEG
guid gov.noaa.ncdc:C01527
licence ["For a list of use limitations of this dataset, see the product README and Algorithm Theoretical Basis Document (ATBD)."]
metadata-date 2019-09-27
metadata-language
progress onGoing
resource-type dataset
responsible-party [{"name": "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-141.56, -66.56], [-8.44, -66.56], [-8.44, 66.56], [-141.56, 66.56], [-141.56, -66.56]]]}
spatial-data-service-type
spatial-reference-system urn:ogc:def:crs:EPSG::4326
spatial_harvester true
temporal-extent-begin 2017-07-05