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The aim of the Laser Interferometer Space Antenna (LISA) is to detectgravitational waves through a phase modulation in long (2.5 Mkm) laser lightlinks between spacecraft. Among other noise sources to be addressed are thephase fluctuations caused by a possible angular jitter of the emitted beam. Thepresent paper follows our preceding one (Vinet et al 2019 Class. Quant. Grav.36, 205 003) based on an analytical study of the far field phase. We addresshere a numerical treatment of the phase, to first order in the emittedwavefront aberrations, but without any assumptions on the static bias term. Weverify that, in the phase change, the higher order terms in the staticmispointing are consistent with the results found in our preceding paper.

Numerical solutions for phase noise due to pointing jitter with the LISA telescope