MC data

MC_JDY/UT1/UT2:

is the event generation time as Julian date to nearest nsec. Note that this is equivalent to the 10MHz clock time (once T zero is added) except that the times are to the nearest nsec and not rounded onto 100nsec boundaries.

MC_GTR:

is the event generation time in 50MHz clock time. It has the same T zero as the 10MHz clock. Unlike real data it remains in phase with 10MHz for the entire job whatever the length!