I’m using a Raspberry Pi and home-made antenna to capture the radar echoes of meteors. There’s more about how this works here.
This page displays the most recent data from the radio. The heatmap shows the number of meteors per hour, for each day of the month. The images below are the 2d and 3d spectrograms of the most recent detection with a good signal-to-noise ratio, and an audio representation is also available (listen for a faint whistle a couple of seconds in).
The final image is a three-month view of activity, showing the diurnal change in activity as the Earth rotates. During shower season, showers can usually be picked out quite easily in these images.
Click on the images to see a larger version. Historical heatmaps can be seen here

