Figure 5. ISS LIS flash detection efficiency as a function of local time of day, relative to GLM, ENGLN, and GLD360. Analysis period for ENGLN and GLD360 was 1 March 2017 through 31 December 2019. The period of analysis for GLM-16 was 20 December 2017 to 31 December 2019, and for GLM-17 it was 13 November 2018 to 31 December 2019 (i.e., after each satellite moved to the GOES-East and -West positions, respectively).