Sinusoidal spacecraft and MOSA tilt maneuvers at ~43 mHz with ~30 nrad amplitude can estimate LISA's 24 TTL coefficients with uncertainties below 15 µm/rad in about 20 minutes.
The OATM specifics are not finalized yet, however, one option is to use piezo electric actuators, providing stepwise actuation of each MOSA in the yaw degree of freedom, i.e
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Design of Dedicated Tilt-to-Length Calibration Maneuvers for LISA
Sinusoidal spacecraft and MOSA tilt maneuvers at ~43 mHz with ~30 nrad amplitude can estimate LISA's 24 TTL coefficients with uncertainties below 15 µm/rad in about 20 minutes.