STK makes the following basic and advanced attitude profiles available, depending on the vehicle and the STK modules for which you are licensed. In the table, 'Great Arc Vehicles' refers to Aircraft (including Aviator aircraft), Ships and Ground Vehicles.
If you are not licensed for a given attitude profile, it will appear dimmed in the profile drop-down list box. Find out more on the licensing help page.
For information on an attitude profile, click the link in the above table.
In general, each basic attitude type has its own set of associated input parameters. Most attitude profiles are generated through the use of two vectors represented in the satellite body-fixed coordinate system, and two vectors represented in the inertial coordinate system. The first vector in each pair is referred to as the alignment vector; the second as the constraint vector. The inertial-to-body-fixed quaternion is constructed so that the representations of the alignment vectors in the body-fixed and inertial coordinate systems are aligned. The quaternion is constructed so that the angle between the constraint vectors in the body-fixed and inertial systems is minimized while the collinear status of the alignment vectors is maintained
When an axis is constrained, that particular axis attempts to point to the desired location as close as possible while still maintaining its proper relationship with the other axes defined in the coordinate system. When an axis is aligned, that axis points directly to the desired object, forcing the other axes to rotate accordingly.
STK Technical Notes are available for central body reference frames supported in STK, vehicle body frames, sensor pointing types, and Vector Geometry Tool (VGT) reference frames.
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