Postprocessing subtraction of tilt-to-length noise in LISA

The coupling of an angular jitter into the interferometric phase readout is summarized under term tilt-to-length (TTL) coupling. This noise expected to be a major source in intersatellite interferometry for Laser Interferometer Space Antenna (LISA) space mission. Despite efforts reduce it by satellite construction, some remaining TTL will need removed postprocessing on Earth. Therefore, such procedure needs developed and validated ensure success LISA paper shows method calibrate subtract that has no impact science operations. solution relies minimization uses differential wavefront sensing (DWS) measurements estimate contribution. Our technique applied after laser frequency suppressed via time-delay (TDI) algorithm. We use simulation show as proof-of-principle we can coefficients required accuracy level based current design configuration LISA. then these estimates noise, ensuring any below other sources. validate simulated data different operating scenarios. work indeed possible effect posteriori from TDI streams.