The reconstruction program

The reconstruction of the simulated hits is done in the second part of the program. If run in one job with the simulation the reconstruction is started from the routine GUOUT, at the end of the GEANT tracking job. If run as a standalone program the system reads in the hits from the hits file, and then starts the reconstruction. To give the reconstruction access to the detector geometry the GEANT infrastructure is used in this case as well to build a geometrical model of the detector.

NOTE: At the moment there is no mechanism to make sure that the geometry model of the reconstruction program is the one actually used at the time the hits were generated. It is the responsibility of the user to ensure that the system starts from coherent data.