From Koji's code. I added vertical seismic noise from a single cavity, no common mode rejection. There are some modification from the code. The spring constant is 45 e3. M1 = 12.3, m2 =5.44.
The seismic noise in this projection is the data taken last week, see psl:696.
The coupling between acceleration noise to length noise is1e-9 * L [m/(m/s^2)]. It is different from the value from FEA because our supporting positions are not exactly the same as the optimum point. It might be off by a few mm. The peak around 6.7 Hz is from Horizontal motion which has not been incorporated in the plot yet.
The noise budget code and auxillary files & functions will be committed on svn.