GeometryTransformerObserveVector Method 
Name  Description  

ObserveVector(Vector, Axes) 
Gets an evaluator that can be used to find the Motion<Cartesian>
of this vector in a given axes at a given JulianDate. Note that this will not account for any
translational effects and the axes are considered to be the vector's basis. So if the vector is representing
a velocity or boresight vector, observing the vector in the axes of a reference frame which is rotating and translating
with respect to the vector's axes will only take into account the relative rotation as if the two basis axes were colocated
when computing the vector's derivatives. To obtain a vector and its derivatives in a different frame,
the vector needs to be created in that frame.
 
ObserveVector(Vector, Axes, EvaluatorGroup) 
Gets an evaluator that can be used to find the Motion<Cartesian>
of this vector in a given axes at a given JulianDate. Note that this will not account for any
translational effects and the axes are considered to be the vector's basis. So if the vector is representing
a velocity or boresight vector, observing the vector in the axes of a reference frame which is rotating and translating
with respect to the vector's axes will only take into account the relative rotation as if the two basis axes were colocated
when computing the vector's derivatives. To obtain a vector and its derivatives in a different frame,
the vector needs to be created in that frame.
