...
- astro::SkyDir GPS::toSky(const CLHEP::Hep3Vector& latdir, double met)
- CLHEP::Hep3Vector tdir( - (m_currentPoint.rotation() * m_alignment * latdir) );
- void GPS::update(double inputTime)
- //this function calculates all the relevant position and orientation info
- the differences could come from his this part of the code