SID
(Sudden Ionospheric Disturbance)

The inset graph shows my results compared with the satellite GOES-6. During the meridianpassage of the Sun (and summertime) the sensitivity of the system can be as good as C-level flares. The transmitter location is Rugby, UK. It transmitts continuously at 60 kHz. One of the purposes with this system is to fill the gaps in the data of the GOES-system. There is a user group who gather data around the globe and provide Space Environmet Center with solar event data.