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.
About this Dataset
| Title | NOAA GOES-R Series Geostationary Lightning Mapper (GLM) Level 2 Lightning Detection: Events, Groups, and Flashes |
|---|---|
| Description | 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. |
| Modified | 2025-11-20T02:55:15.844Z |
| Publisher Name | N/A |
| Contact | N/A |
| Keywords | Earth Science > Atmosphere > Atmospheric Electricity > Lightning , Geographic Region > Equatorial , Geographic Region > Mid-Latitude , Geographic Region > Tropics , Geographic Region > Northern Hemisphere , Geographic Region > Southern Hemisphere , Geographic Region > Western Hemisphere , Continent > North America > United States Of America , Continent > South America , Continent > North America > Central America , Ocean > Atlantic Ocean , Ocean > Pacific Ocean , Vertical Location > Troposphere , Vertical Location > Land Surface , GOES > Geostationary Operational Environmental Satellites , GLM > Geostationary Lightning Mapper , GOES-16 > Geostationary Operational Environmental Satellite 16 , GOES-17 > Geostationary Operational Environmental Satellite 17 , GOES-18 > Geostationary Operational Environmental Satellite 18 , GOES-19 > Geostationary Operational Environmental Satellite 19 , 10 km - HTML Markup Was Removed , HTML Markup Was Removed , DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce , DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce , DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce , DOC/NOAA/NESDIS/OSPO > Office of Satellite and Product Operations, NESDIS, NOAA, U.S. Department of Commerce , gov.noaa.class:GRGLMPROD , GLM-L2-LCFA , GRGLMPROD , GLML2LCFA , climatologyMeteorologyAtmosphere |
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