Edgard, Ivey

This Tuesday Oli ran into issues installing the new blend filters and new SR3 Yaw transfer function fits for the OSEM estimator (see LHO: 86319). An error from the cplxpair function, which pairs complex conjugates, appeared only when converting the fit from zpk into state space. Somehow, this would introduce a small but significant difference between any two complex pairs, which would cause the computer to reject it as a complex pair. To resolve this issue, we ran a function to average each complex pair. We tested it with our mock PR3 model in the lab, and this seemed to fix the error cplxpair was encountering.

We were not able to reproduce the error that Oli noticed with the blend filters in our lab, but we will look more into this, and hopefully the issue will be fixed by next Tuesday when Oli tests the estimator again with the new fits.

The new cleaned SR3 yaw fits were added to SusSVN and can be found here '~/SusSVN/sus/trunk/HLTS/Common/FilterDesign/Estimator/fits_H1SR3_Y_2025-08-05.mat'. More on the fits LHO: 86233.

The new blend filter with updated fits can be found here '~/SusSVN/sus/trunk/HLTS/Common/FilterDesign/Estimator/Estimator_blend_skinnynotch_SR3yaw_20250723.mat'. More on the blend filter LHO: 86265.