The Ground Pointing feature is designed to point towards a ground station during the orbit. It is possible to define multiple
Ground Pointing features.
Define the Latitude and
Longitude (SI unit radians, default value
0[deg]) of the ground station.
Selected any of the available Event indicator options to define the criteria that defines when the spacecraft begins to be on target and when it goes out of target.
When Elevation angle is selected enter the value for the
Threshold (SI unit radians, default value
0[deg]) to define the on target and out of target positions.
When Ranging is selected, define the
Threshold (SI unit m, default value
0[km]) that corresponds to the distance to the target that defines the limit between the on target and out target regions.
Use the User defined option to enter an expression for the
Event indicator and for the
Threshold.
For all types of Event indicator you can select the
Point to target for a specified time check box. When this is selected the
Axes and Orientation out of Target settings are applied at the end of the specified period instead of when the trigger condition is not longer verified.
The Primary axis orientation is automatically defined from the ground point direction. Define the
Secondary axis orientation from the corresponding check box.
The Rotations about the primary, secondary and tertiary axis can be either set to
None,
Angular position (SI unit radians, default value
0[deg]), or
Angular rate (SI unit radians per second, default value
0[deg/s]). Note that the fas tumbling option is always disabled when the ground station is on target.
When the Event indicator is no longer active or the
Pointing time is elapsed, the spacecraft is no longer pointing to the station. Set the
Fast tumbling check box to control whether the fast tumbling approximation (see
Initial Orientation) is active or not when the spacecraft goes out of target. Select an
Axes feature and a
Orientation feature to define the out of target spacecraft pointing and orientation.