•For the information on the new system available since FreeFlyer 6.6, see the Orbit Determination Guide.
•Various Objects, Properties, Methods, and Functions have been deprecated
oDeprecated Objects, Properties, Methods, and Functions are elements of FreeFlyer which are no longer recommended for use. The description of each deprecated element indicates the new recommended way to achieve the functionality of that element. The complete list of affected elements is given on the Deprecated Objects, Properties, Methods, and Functions page.
•The Spacecraft.EquinoctialLongitude has been updated so that its units are correctly applied in degrees instead of radians.
•The output of Spacecraft.IIRV has been updated to use the Geocentric True Of Date Rotating reference frame instead of the Earth-Fixed frame.
•The 6th element of the non-singular Keplerian element set (Spacecraft.NonSingularE5) has been updated to correctly use mean anomaly in its calculation.
•When using the NoradSP propagator, the covariance will now be populated into the NoradSP.Covariance property instead of the Spacecraft.Covariance property. The Spacecraft.Covariance property was removed from FreeFlyer with the deprecated Orbit Determination. NoradSP.Covariance can also be accessed using the syntax (Spacecraft.Propagator AsType NoradSP).Covariance.
•Improvements to the computation of relative error threshold for several integrators may affect propagation results.