PLAIT was initially elaborated as a Gildas "task" by P.Hily-Blant
using original ideas from Ch.Nieten
see https://articles.adsabs.harvard.edu/pdf/2000ASPC..217...72N
It uses the "Basket Weaving" method described in Emerson and Graeve 1988,
Astron. and Astrophys. 190, 353E