The latiss_cwfs_align script uses sensitivity matrix https://tstn-016.lsst.io/ in the process of determining the wavefront shape to align the auxiliary telescope.  Recent work (DM-37396, DM-37533, DM-37629) found that the `latiss_cwfs_align` script used incorrect fractional obscuration value (0.423 rather than 0.3525). This means that sensitivity matrix may need to be re-calculated using the correct obscuration. 

NB: 

AuxTel mirror diameter = 1.2 meters
AuxTel central obscuration diameter = 0.423 meters
AuxTel obscuration ratio = 0.423 m/1.2 m = 0.3525 (dimensionless)

(courtesy of Josh Meyers) 

Note: both CWFS and WEP codes  use "obscuration" in a fractional meaning - compare

https://github.com/lsst-ts/ts_wep/blob/develop/policy/cwfs/instData/lsst/instParamPipeConfig.yaml  and https://github.com/lsst-ts/cwfs/blob/master/data/lsst/lsst.param