SIH: use projection functions and constants from geo lib
SIH: remove unnecessary member variable
SIH: clarify names of rotation matrices and frames
SIH: do not store DCM corresponding to quaternion attitude
Using DCM is more efficient when more than 1 rotation needs to be done,
which is not the case here.
SIH: don't store local variable as member
SIH: use Wgs84 constants everywhere
SIH: do not store delta_quaternion
Converting an AxisAngle to a Quaternion uses the exponenial
SIH: organise ECEF member variables
SIH: add earth spin rate to gyro data
Co-authored-by: bresch <brescianimathieu@gmail.com>
Marco Hauswirth