Why are you doing this?
This is a question that is asked a lot, and really no one knows the answer. I created this site to help answer this question. You can read about it more on a blog post I wrote.

Where are you getting this data?
Right now, I'm collecting this data. I'm hoping that other wireless folks will help contribute.

How can I contribute?
Great! If you know how to test DFS events with a SDR, then you can submit your results here.

I have an AP but don't know how to test DFS events.
If you have an SDR you can go take a look at Adrian Granados blog. on how to simulate DFS events. If you don't have an SDR and don't mind letting me borrow the AP I can test it. You can contact me and let me know!