Interface for SGP4 propagator.
  ArgOfPerigee | Angle from the ascending node to the eccentricity vector (lowest point of orbit) measured in the direction of the satellite's motion. Uses Angle Dimension. | 
  BStar | Drag term for the satellite. | 
  Classification | One-letter classification indicator. U - Unclassified, C - Classified, S - Secret. | 
  Eccentricity | Value between 1 and 0 representing the ellipticality of the orbit. Dimensionless. | 
  Enabled | Enables/disables the segment. | 
  Epoch | Universal date and time at which the specified orbit elements are true. Dimensionless. | 
  Inclination | Angle between the angular momentum vector (perpendicular to the plane of the orbit) and the inertial Z-axis. Uses Angle Dimension. | 
  IntlDesignator | International designation of the satellite. | 
  MeanAnomaly | Angle from the eccentricity vector to a position vector where the satellite would be if it were always moving at its average angular rate. Uses Angle Dimension. | 
  MeanMotion | A measure of the osculating period of the orbit, expressed as an angular rate. Uses AngleRate Dimension. | 
  MeanMotionDot | First time derivative of mean motion. Dimensionless. | 
  MotionDotDot | Second time derivative of mean motion. Dimensionless. | 
  RAAN | Angle from the inertial X-axis to the ascending node. Uses Angle Dimension. | 
  Range | How far apart the satellites are when switching occurs. | 
  RevNumber | Rev. Number. Dimensionless. | 
  SSCNum | Catalog number of the spacecraft, if created by a 2-line element set. | 
  SwitchingMethod | Method used to switch between element sets. | 
  SwitchTime | Gets or sets the time of the switch between one element set and a second set. Not used when the Switching Method is Disabled. | 





