Can you help me interpret this 2.4GHz WiFi spectrum analysis noise plot
that I just ran from my Ubiquiti Rocket M2 rooftop antenna?

I'm trying to debug why I have -88dBm of noise at my rooftop radio.

My Rocket M2 rooftop radio is on channel 10.
My home broadband router inside the house is on channel 1.

Here is the "waterfall" plot:
http://farm8.staticflickr.com/7299/1...48f3922e_o.jpg

Here is the "channel" plot:
http://farm8.staticflickr.com/7310/1...e93b109b_o.jpg

Here's a site survey:
http://farm6.staticflickr.com/5484/1...32590c4f_o.png

And, here's a view of the rooftop radio signal to noise strength:
http://farm8.staticflickr.com/7380/1...0692ea50_o.png

Any observations with respect to the source of the -88dB noise?
(I don't really know how to interpret this stuff.)