The question arose whether we can get good enough data to diagonize our OSEM sensing matrices in air. 

I just took a look at the BS spectra over the last six hours (~10PM-4AM), and the SNR looks good. The BS diagonalization itself doesn't seem so great; the POS is hugely coupled into pitch and yaw, and the angular motions are themselves coupled to each other at around 10%. 

NB: use a flat-top window when you really care about peak heights that don't fall exactly on an FFT bin. 

I would've liked to check this for the PRM and SRM too, but one of the PRM sensors continues to be dark, and I just noticed that all of the SRM OSEM signals are dark. ughhhh