FiniteBurn.BurnDirection Property |
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DescriptionThe components of the thrust vector in the coordinates of the attitude system specified by the chosen AttitudeSystem.
For each attitude system the components are defined as follows:
Note: When the attitude system is "Spacecraft Attitude," the Spacecraft object's attitude is adjusted so that the Euler angles are temporarily set to the values specified by the BurnDirection components for the duration of the maneuver. Each angle specified by the BurnDirection Array is evaluated in degrees and is referenced to the Spacecraft object's attitude reference frame. The Euler sequence used to apply the BurnDirection components during the maneuver is defined by the Spacecraft object's EulerSequence property. Where applicable, individual thruster orientations defined in the Thruster object(s) are used to direct the delta-Vs.
In the above descriptions, the Orbit Normal is aligned with the angular momentum vector, the Negative Orbit Normal is aligned with the negative angular momentum vector, and Nadir points to the center of the Earth. The X-components of the VNB and LVLH coordinate systems, Velocity and Co-Velocity, differ by a rotation about the flight path angle. For more information on each of the coordinate systems above, see the Attitude Reference Frames page.
Timing Precision Mode This page describes functionality in nanosecond timing precision mode. Click here to see the documentation for this object in millisecond timing precision mode.
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