Real-Time Attitude Data

You can use the Integration capability — specifically, Connect — to create an attitude profile using near-real-time attitude data.

Calculation methods

The calculation of attitude on the basis of real-time data depends on the following parameters:

Parameter	Description
Attitude Look Ahead Properties Method	Choose the method for calculating attitude past the current data point: Extrapolate. STK uses the last two history points to extrapolate attitude into the Look Ahead window. This method is best if attitude changes slightly over time. Hold. Attitude remains the same from the last data point. This method is best when fixed attitude is more reliable than an approximate value.
Look Ahead Duration	STK calculates attitude at a future moment that is defined by adding the Look Ahead duration to the time of the most current data point. For instance, if the time of the last data point is 12:00 and the Look Ahead duration is 1800.0 seconds, STK would calculate attitude until 12:30.
Look Behind Duration	STK stores attitude data points transmitted via Connect into temporary memory. The Look Behind duration specifies how long the temporary data points will be stored by subtracting the Look Behind duration from the time of the most current data point. For instance, if the time of the last data point is 12:00 and the Look Behind Duration is 1800.0 seconds, STK would prune all data received before 11:30. The bigger this value, the more storage space the data will consume.

Modifying duration

To edit Look Ahead and Look Behind Duration, click Modify Values.... In the Modify Real Time Values window, enter the duration values. Click OK to implement the new values or Cancel to dismiss the Modify Real Time Values window without changing the existing values.

Any changes you make in the Modify Real Time Values window to the Look Ahead and Look Behind durations will also change durations for real-time orbit propagation and model articulations.