Geometrical reconstruction of UHE cosmic rays detected by fluorescent detectors

We present the geometrical reconstruction of the events detected by fluorescence detectors (FD) similar to those of the Pierre Auger Observatory (PAO). The input of the geometrical reconstruction program is given by the output data of the FD simulation program, FDsim. The efficiency of this program is computed by comparing its results with the data of the simulated shower. The implementation of the hybrid reconstruction is also discussed