Satellite: Astrogator Values: Spherical Elems

Calc Objects for the ephemeris of the object, expressed in spherical elements.

Name Dimension Type Description
Time DateFormat Real Number Time.
Cosine_of_Vertical_FPA Unitless Real Number The dot product of the unit position and unit velocity vectors. The Calc Object allows a choice of a central body. The default is Earth.
Declination AngleUnit Real Number The signed angle measured from the XY plane to the position vector, where positive angles are used for locations above the XY plane, and negative for those below.
Declination_Rate AngleRateUnit Real Number The rate of change in the declination
Flight_Path_Angle AngleUnit Real Number The angle between the position and velocity vectors. The Calc Object allows a choice of coordinate systems. The default is Earth Centered Inertial.
R_Mag DistanceUnit Real Number The magnitude of the position vector (i.e. the radius vector). The Calc Object allows a choice of coordinate systems. The default is Earth Centered Inertial.
Right_Asc AngleUnit Real Number The signed angle measured from the X axis to the projection of the position vector into the XY plane. The angle increases in the direction found by the right hand rule about the Z axis. The Calc Object allows a choice of coordinate systems. The default is Earth Centered Inertial.
Right_Asc_Rate AngleRateUnit Real Number Right Ascension Rate
V_Mag Rate Real Number The magnitude of the velocity vector, as observed in the coordinate system. The Calc Object allows a choice of coordinate systems. The default is Earth Centered Inertial.
Velocity_Azimuth AngleUnit Real Number The angle, measured in the plane perpendicular to the position vector, between the local north direction and the projection of the velocity vector onto that plane, measured as positive moving toward local east. The Calc Object allows a choice of coordinate systems. The default is Earth Centered Inertial.

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