if cfg.getboolean("projectVelocity"):
        # project velocity on inclined plane
        dataIniV = DFAtls.scalProd(dataIniVx, dataIniVy, dataIniVz, np.cos(phiRad), 0, -np.sin(phiRad))
        dataAnaV = DFAtls.scalProd(dataAnaVx, dataAnaVy, dataAnaVz, np.cos(phiRad), 0, -np.sin(phiRad))
    else: