A day in the life of the RF spectrum

Back in 2005, James E. Cooley looked at the (under)utilisation of the radio frequency spectrum in his master's thesis:

http://dspace.mit.edu/handle/1721.1/33894

He isn't only documenting the utilisation of RF spectrum based on time, frequency and location, but also provides techniques for the detection of incumbent users.

So, most of the work necessary for my GNU Radio project on spectrum sensing has already been done...

Thanks to Andreas Müller for pointing me at this.