Following is a rough outline of the decision tree which is applied in the process of queue execution. This is expressed as a flow diagram in Section 6 . 5.1. Sky darker than investigator stated threshold.
Transparency is within proposal limits.
When these criteria are met, the programme field and observation group is defined as viable and becomes eligible for observation. On completion of a programme group. Compile complete list of currently viable programmes, ordered according to TAC ranking. These operations may be performed entirely automatically. Therefore, there is no reason not to repeat them after every exposure, thus providing the observer with a constant update on the state of the queue according to current conditions.