Jeff pointed out that some incoherent sensor noise (I think that's the phrase he used) in Krishna's post from earlier today. He suggested this may be due to RY coupling to X. We might be able to fix this by pushing up the blend on RY or use a blend the rolls off the seismometers at low frequency. RX and RY already use Ryan's 250 mhz blends, so at first glance we only have 1 filter with a higher blend. I've attached 4 plots, the first three of which show CPS, L4C and T240 components respectively of our available blends. The fourth plot compares the T01_28 (dashed) components and the current 250mhz blend (solid). It looks like the T01_28 maybe (?) fits the bill for more low frequency roll off of the seismometers.