Slew Options
In the Vector Geometry Tool, when you select Create new Vector or Create new Axes, the Add Geometry Component dialog box appears. To select and define slew options, select Scheduled as the type for the vector or axes and click . The Slew Options dialog box appears and displays the following options:
| Option | Description |
|---|---|
| Slew Type |
Fixed time. STK designs the slew for the full time period specified in the Slew window duration field. Constrained. STK designs the slew to be consistent with the constraints specified in the Constraints field. |
| Slew Definition |
Direct. STK directly rotates the vector or axes from On to Off or vice versa without blending the rotation. Quadratic blending. STK uses a second-degree polynomial to blend the slew. Cubic blending. STK uses a third-degree polynomial to blend the slew. |
| Reference Axes | These are the axes in which STK designs the slew. |
| Slew timing |
Favor On Schedule. When timing conditions conflict, STK selects the On schedule. Shortest. When timing conditions conflict, STK selects the Shortest time. Favor Off Schedule. When timing conditions conflict, STK selects the Off schedule. |
| Slew window duration |
When the slew type is Fixed time, this value is the duration of the slew. When the slew type is Constrained, this value is the maximum time allowed to complete the slew while still meeting the slew constraints. However, the maximum rate and acceleration might be too small to complete the slew within this Slew window duration. In this case, STK will do the following:
|
| Min off schedule duration | For Off durations shorter than this time period, STK will not allow a slew to the Off vector or axes within that window of time. |
| Maximum Rate | This is the largest angular velocity allowed when performing a constrained slew. |
| Maximum acceleration | This is the largest angular acceleration allowed when performing a constrained slew. |