Calibration of the ENTLN against rocket-triggered lightning data

Abstract

We have estimated the ENTLN (formerly WTLN) performance characteristics using data for 245 negative return strokes in 55 flashes triggered from June of 2009 to August of 2012 at Camp Blanding, Florida. Performance characteristics are presented for both originally reported lightning data and reprocessed lightning data (the new processor was introduced in November of 2012). After the reprocessing, the ENTLN performance characteristics changed (relative to those corresponding to the originally reported data) as follows. Flash detection efficiency increased from 80% to 89%, stroke detection efficiency increased from 49% to 67% percentage of misclassified events decreased from 60% to 52% median location error increased from 621 m to 687 m, and median absolute current estimation error decreased from 51% to 17%.