The first part of reconstruction program creates clusters for charged particles in both calorimeters using the TPC information:
CALL FIND_CLUSTER_CORE
CALL FIND_ELECTRON_CLUSTER
CALL FIND_HADRON_CLUSTER
and extended search of hadron clusters:
CALL FIND_HADRON_CLUST_3
The second part of program finds clusters in ECAL and HCAL for the rest of hits - the treatment of the neutral part of events:
CALL ECAL_RECONST
CALL HCAL_RECONST
The last step is the cluster merging in both calorimeters:
CALL ECAL_HCAL_MERGE
And the second attempt to find HCAL cluster joined to ECAL cluster:
CALL ECAL_HCAL_MERGE_AGAIN.