The OT calculates the calibration overheads as part of its time estimate and the calibration time estimate tool was built to help in the implementation of this feature. It allows various parameters to be entered and the required dwell and cycle times for a variety of calibrators to be displayed. This tool can be seen in Figure 7.7. It is sensitive to the current choice of node in the Project Tree and will show the appropriate parameters already filled in for e.g. the currently-selected Science Goal.