Introduction to the GLM

COMET

2025

45 Min

Introduction:


This lesson describes the need for real-time lightning information and the capabilities of the Geostationary Lightning Mapper (GLM), which will fly on the next-generation GOES-R satellites as the first operational lightning detector in geostationary orbit.This lesson is a part of the NWS Satellite Foundational Course for GOES-R.More in-depth discussions on the lightning flash cycle and lightning applications can be found in the COMET lesson, GOES-R GLM: Introduction to the Geostationary Lightning Mapper.

Objectives:


  • Describe the GLM’s benefits and capabilities
  • Describe the main components of the cloud-to-ground lightning flash life cycle
  • Differentiate between how lightning is observed by space-based and ground-based detection systems
  • Outline the process of converting GLM observations to a lightning flash product
  • Describe how GLM observations can help improve situational awareness and support severe weather warning decisions
  • Explain how GLM observations can improve warnings of impending lightning hazards
  • Highlight other applications that benefit from GLM observations

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