“GOES-R GLM: Introduction to the Geostationary Lightning Mapper”

The COMET Program is pleased to announce the release of the lesson "GOES-R GLM: Introduction to the Geostationary Lightning Mapper". This one-hour lesson is an extension of the COMET lesson “GOES-R: Benefits of Next Generation Environmental Monitoring” and focuses on the GLM instrument, the satellite's lightning mapper. The Geostationary Lightning Mapper will provide continuous lightning measurements over a large portion of the Western Hemisphere, mapping total lightning (intra-cloud and cloud–to–ground) flash rates and trends. GLM observations will improve local forecasts and warnings of severe weather and air quality, and provide new data for numerical weather prediction and studies of regional climate and climate change. The first part of the lesson describes the need for real-time lightning information and introduces the capabilities of the GLM, which will fly on the next-generation GOES-R satellites. The second section lets users explore the life cycle of a typical cloud-to-ground lightning flash, how it is observed by space and ground-based detection systems, and how lightning flashes translate into GLM observations. The final section explores some of the many applications that will benefit from GLM observations including convection and severe weather nowcasting, warning of lightning ground strike hazards, aviation, atmospheric chemistry, quantitative precipitation estimation, tropical cyclones, fire ignitions, numerical weather prediction, and climate and global studies. This lesson uses JavaScript so please ensure that your browser is updated to the latest version, with JavaScript enabled. For technical support, please visit our Registration and Support FAQs at https://www.meted.ucar.edu/resources_faq.php We welcome any comments or questions about the content, instructional approach, or use of this lesson. Please e-mail them to Patrick Dills (dills@ucar.edu).
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