The GNSS tomography is a method to reconstruct 3D data based on Slant Delay integrated measurements. As the method was researched by many scientists around the world its advantages (high horizontal resolution, sensitivity to troposphere changes, capturing dynamics of the weather) and limitations are well known (sensitivity to biases in observations, instability of solution, complicated mathematical derivation).

The next step in GNSS tomography research is inevitably linked with its applications in the weather studies, one of the concept is that it can be used to investigate severe weather. In mid-latitudes these are usually linked with multi or super cell storms. Whereas the storms forming mechanism is well known, the forecasting in terms of location and severity is not so well investigated. One of the major reason is that we don’t have a measurements that will provide 3D structure of the troposphere priori, during and after the event. The GNSS tomography can fill that gap.

Within this study we will investigate several storms outbreaks in Poland using GNSS tomography models developed in Belgium (BIRA) and Poland (TOMO2) to make sure we can apply this innovative tool to address issues of weather nowcasting and forecasting. As a result recommendations for further development of tomography models will be formed.