The ionospheric disturbance index (DIX-SG) and its performance under continuous operation

Kurzfassung

The ionosphere is the largest natural source of error for trans-ionospheric signals and existing geomagnetic or solar indices can only provide global and indirect information. Therefore, a temporally and spatially resolved ionospheric disturbance index is needed that objectively describes the current level of disturbance to the system and services for operators. We have developed a prototype ionospheric disturbance index (DIX-SG) that is able to describe the ionospheric disturbance level with high spatial and temporal resolution. The index is based on measurements from real time GNSS networks and provides a clear picture about regional ionospheric disturbances and their strength based on a simple but powerful numerical approach. As a real-time indicator that objectively and reliably describes the extent and strength of ionospheric disturbances, the DIX-SG could form an essential basis for future global space weather services. We will present the performance and effectiveness of the DIX-SG and describe its metrological boundary conditions using a series of analyzed recent ionospheric storm events. In addition, we have recently transferred the DIX to an operational environment and are showing the first results of its performance in continuous operation.