Spectrum analysis?

[Sven Hazejager]

Is there a way to do a spectrum analysis for the wifi band with ath on
CURRENT? I would like to understand which channels give me the best
signal/noise ratio (my baby monitor completely blows our wifi away)
above and beyond other 802.11 activities. Does not need to be fast.
Mikrotik has something like this; they use standard Wifi equipment to
analyze 20MHz at a time with 10MHz increments, creating a nice heat
map of the available spectrum...

Thanks!