The National Light Detection Network of the China Meteorological Administration

The national Lightning Detection Network of the China Meteorological Administration (CMA LDN) has been under construction since 2008. It works in the VLF/LF frequency band to detect Cloud-to-Ground (CG) flashes. It uses the time of arrival and direction finding integrated method to locate, and its operations are stable. The evaluation of the detection efficiency within the network using historical data is close to 70%, while the location accuracy using four stations and above is less than 200 meters. The peak current error is less than 30%. Through the analysis of the lightning monitoring data for 5 years from 2013 to 2017, it is found that the lightning activity as a whole has a downward trend in recent years. There is a large difference in lightning activity in different regions. Generally, the south is the most active, and the flash density is the highest in southern China. The most, especially the average proportion in August is more than 30%.