Advanced Options for a Chain

The Advanced page for a chain enables you to set the following properties:

Category Option Description
Compute Time Period Use Object Time Periods The Time Period that you set for objects in the chain is used to compute access. For facilities and targets, the scenario Time Period is used.
Use Scenario Time Period The Time Period that you defined for the scenario is used to compute access.
User Specified Time Period Specify the Start and Stop time for access computation.
Strand Access Intervals File Create If you select this checkbox, access computations are used to produce an .int file containing the strand access intervals.
Access Automatically Recompute Accesses

If you select this checkbox, STK automatically recomputes accesses each time that an object on which the chain depends is updated.

Note: Accesses are recomputed when definition changes occur, but not when changes merely involving 2D and 3D graphics occur.

Access Save Mode Don't Save Accesses Access computations are not saved with the chain.
Don't Save, Compute on Load Access computations are not saved with the chain, but they are recalculated each time that the chain is opened in STK.
Save Accesses Access computations are saved with the chain.
Compute Options Use Light Time Delay Enables light time delay.

Note: Setting this option will significantly increase the time it takes to compute access.

Access Options... Click to specify event detection and step size control parameters.

Note: If the object's time period is shorter than the time period that you set here, accesses are computed only for the object's time period. STK does not extrapolate beyond the object's time period.