Choose the number of times the defined exposure is to be iterated; Choose 1 if only one execution of the exposure is desired. Typical reasons for iterating an exposure are to monitor temporal changes in a target or to keep CCD exposures short to minimize blooming by a bright star. If more than one execution is requested, iterations (in the form of additional subexposures) will be created and executed contiguously. Also note that for STIS, these subexposures can be interrupted by an wavecal. The wavecal can be suppressed; see
SEQuence <exposure-list> NON-INTerruptible (replaced by Exposure Group Containers in the APT User Interface).
