[en] The aim of the invention was the improvement of restoration accuracy of spatial coordinates of particle tracks in streamer spack chambers. This aim is attained with the construction of reference points in a working volume of the chamber by means of pulse laser beams in the form of intersecting reference tracks which location in space is known with a given accuracy. As laser reference tracks and particle tracks are equally shifted in prepulse field and leading edge of a main pulse the position of particle tracks relative to the system of laser reference tracks remains invariable. The suggested technique for setting coordinate system permits to increase 5-10 times the restoration accuracy of spatial particle tracks in the streamer chamber as compared with the known techniques of the track restoration