A comparison of ground-based lightning networks against satellite-based lightning measurements

Lightning stroke data from the World Wide Lightning Location Network (WWLLN) and lightning stroke data from the Earth Networks Total Lightning Network (ENTLN) were compared to lightning group data from the Lightning Imaging Sensor (LIS) from 1 January 2010 through 30 June 2011. The region of study, about 39°S to 39°N latitude, 164°E to 17°W longitude, chosen to approximate the Geostationary Lightning Mapper (GLM) field of view, was considered in its entirety and then divided into geographical sub-regions. We looked for coincidences between LIS groups and WWLLN strokes and between LIS groups and ENTLN strokes. We found day-to-day variability for both WWLLN and ENTLN coincidence percents (CP). There was a fair amount of spatial variability also. We will show some overall CP values for different regions and figures that detail CP values in individual 1° by 1° and 2° by 2° grid squares. We will also show time series plots that reveal the day-to-day variability.