Merges timing information from one timing structure into another
CALL TCI_MERGE( NMER, MERID, OUTID, TBASE, TOFFS, STATUS )
Merging timing description consists of the following steps,1) Merge the observation start times. The earliest is chosen 2) Merge exposure times. These are simply added 3) Merge the observation lengths. The merged observation length is the sum of the inputs 4) Merge the live time slots