Satellite: True Anomaly Step: TrueOfEpoch

The true equator true equinox coordinate system evaluated at the epoch of the object.

Name Dimension Type Description
Time DateFormat Real Number Time.
Semi-major Axis DistanceUnit Real Number A measure of the size of the orbit. Orbits with eccentricity <1 are ellipses, with major and minor axes identifying the symmetry axes of the ellipse, the major axis being the longer one. The value is half the length of the major axis.
Eccentricity Unitless Real Number A measure of the shape of the orbit. Values <1 indicate an ellipse (where zero is a circular orbit) and values >1 indicate a hyperbola.
Inclination AngleUnit Real Number The angle between the orbit plane and the XY plane of the coordinate system.
RAAN LongitudeUnit Real Number The angle in the XY plane from the X axis to the ascending node, measured in a right-handed sense about the Z axis. in the equatorial plane. For equatorial orbits, the ascending node is defined to be directed along the positive X axis, and thus the value is 0.0. The Calc Object allows a choice of coordinate systems. The default is Earth Centered Inertial.
Arg of Perigee AngleUnit Real Number The angle from the ascending node to the periapsis vector measured in the orbit plane in the direction of the object's motion. The periapsis vector locates the closest point of the orbit. For a circular orbit, the value is defined to be zero (i.e., periapsis at the ascending node).
True Anomaly AngleUnit Real Number The angle from the periapsis vector, measured in the orbit plane in the direction of motion, to the position vector.
Mean Anomaly AngleUnit Real Number A measure of the time past periapsis passing, expressed as an angle.
Arg of Latitude AngleUnit Real Number The sum of the true anomaly and the argument of periapsis..
True Longitude AngleUnit Real Number Sum of RAAN, argument of periapsis and true anomaly.

STK Programming Interface 11.0.1