Jamie, Sheila, Craig

We were updating our noise budget and noticed that the spectrum of GDS calib strain we calculate using pwelch with a hanning window and 5 second FFTs had spectral leakage.  For comparison we took some spectra in DTT and found that with a bandwidth of 0.5Hz we can reproduce the problem in DTT.  The attached screenshot shows spectra taken with different bandwidths and windows. 

It seems like we need more attenuation of the microseism.