Hi all,
The getGASTFunction, getGMSTFunction as well as some internal private
classes like
StellarAngleCapitaine do return DerivativeStructure to include the
first time
derivative of the Earth rotation.
However, it seems this derivative is never really used by Orekit
itself, since some
changes months or years ago (probably when we did the last speed
improvement in
Earth transforms).
I would like to remove this derivative and simply return a double with
the angle
itself, as it would greatly simplify porting these methods to Field.
Does anyone use these derivatives directly or can I change the return
type from
TimeFunction<DerivativeStructure> to TimeFunction<Double>?