  Sequences sets with low aperiodic auto- and cross-correlations play an
important role in many applications like communications, radar and other active
sensing applications. The use of antipodal sequences reduces hardware
requirements while increases the difficult of the task of signal design. In
this paper we present a method for the computation of the Integrated Sidelobe
Level (ISL), and we use it to calculate the asymptotic expression for the ISL
of a set of sequences formed by different rotations of a Legendre sequence.
