Between May and August of 2015, 2017 and 2018, measurements were carried out using the VFRS in large areas of the Austrian Alps. Within this period, data from 51 thunderstorms were recorded on 51 thunderstorm days. Figure 2 shows the measuring points (black) and the regions in which it was possible to measure lightning activity.
The extensive raw data is recorded systematically and must be processed for each individual case. This is one of the most time-consuming steps due to the large amount of data.
By applying defined quality criteria for the acquired measurement data (such as visibility conditions, visibility of all individual discharges, quality of the electrical and optical measurement results), numerous data records have already been assessed and stored successfully.
Based on the current state of data analysis, a total of 532 negative lightning strokes were analyzed.