The Geostationary Lightning Mapper (GLM) is an optical transient detector and imager operating in the near-IR that maps total lightning (in-cloud and cloud-to-ground) activity with near uniform spatial resolution of approximately 10 km continuously day and night over the Americas and adjacent ocean regions. Research and testing has demonstrated the GLM potential for improvement in tornado warning lead time and false alarm rate reduction.
It is anticipated that GLM data will have immediate applications to aviation weather services, climatological studies, and severe thunderstorm forecasts and warnings. The GLM will provide information to identify growing, active, and potentially destructive thunderstorms over land as well as ocean areas.
Engineering Design Unit
GLM measurements can provide vital information to help the operational weather, aviation, disaster preparedness, and fire communities in a number of areas:
Improvement in tornado and severe thunderstorm lead times and false alarm reduction
Early warning of lightning ground strike hazards
Advancements in the initialization of numerical weather prediction models through better identification of deep convection
Improved routing of commercial, military, and private aircraft over oceanic regions where observations of thunderstorm intensity are scarce
Improved ability to monitor intensification or decay of storms during radar outages, or where radar coverage is poor or scarce, such as in mountainous areas and oceanic regions
Better detection and short range forecasts of heavy rainfall and flash flooding
Ability to monitor the intensity change of tropical cyclones, which is often accompanied by increased lightning activity
Continuity and refinements of lightning climatology within the GOES field of view
GLM Sensor Unit
GLM Sensor Unit (see through)
• Staring CCD imager (1372x1300 pixels)
• Near uniform spatial resolution 8 km nadir, 14 km edge fov