  The tetragonal compound Sr2RuO4 exhibits a chiral p-wave superconducting (SC)
state of its three t2g-type conduction bands. The characteristics of
unconventional gap structure are known from experiment, in particular
field-angle resolved specific heat measurements and from microscopic theories.
A rotated extremal structure on the main active SC band with respect to the
nodal gaps on the passive bands was concluded. We propose that this gap
structure can be further specified by applying the STM- quasiparticle
interference (QPI) method. We calculate the QPI spectrum within a three band
and chiral three gap model and give closed analytical expressions. We show that
as function of bias voltage the chiral three gap model will lead to
characteristic changes in QPI that may be identified and may be used for more
quantitative gap determination of the chiral gap structure.
