Real Time Attitude Data

If you have an STK Integration license, you can create an attitude profile using near-real time attitude data via Connect.

Calculation Methods

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

Parameter	Description
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 point in time 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 are to 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 prior to 11:30. The bigger this value, the more space is required on your hard drive to store temporary data.

Modifying Duration

To edit Look Ahead and/or Look Behind Duration, click Modify Values. In the Modify Real Time Values window, enter the desired 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 also change durations for Real-Time orbit propagation and model articulations.