APT Visit Planner Top Level Requirements and Glossary

Requirements

1. Indicate the times when visits can or cannot be scheduled.
2. Indicate the reasons that a visit cannot schedule at a particular time.
3. Provide direct access to editors within APT to change visits and the relationships between visits to modify schedulability.
4. Provide general advice on techniques to obtain desired schedulability.
5. Provide analysis of how particular visits might be modified to improve their schedulability or to obtain schedulability for particular dates.

Glossary

• Link:
  A relationship among 2 or more visits.
• Observer Requirements:
  The requirements which observers place on observations to meet science goals.
• Observatory Restrictions:
  The restrictions which an observatory places on observations as a matter of policy or physical limitations
• Observation Constraint:
  An Observer Requirement or Observatory Restriction that constrains the circumstances under which a visit may be scheduled.
• Scheduling Constraint:
  Any Observation Constraint or combination of Observation Constraints that affects when a visit can or cannot schedule.
• Scheduling Windows:
  The periods of time that a visit can or cannot schedule due to scheduling constraints.
• Total Scheduling Windows:
  A set of scheduling windows that accounts for all scheduling constraints.
• Partial Scheduling Windows:
  A set of scheduling windows that takes into account a subset of scheduling constraints..
• Schedulable/Unschedulable Window:
  A period of time over which a visit can or cannot schedule.
• Visit:
  Any grouping of observations which can be scheduled as a unit.