specific formula to calculate it,
as when I plot the seasonal data the FRD is showing in decimals value over the lightning hotspot region too.
Thank you for your message. I wanted to reach out to you to inform you that I have forwarded your question to the developers. I will be sure to provide a follow-up message as soon as I have their response.
After speaking to the developers, they have recommended the following journal article, "Where are the lightning hotspots on Earth?" This will provided details on the flash density algorithm used. The DOI link is: