WITSML Trajectory Station Raw Data Uncorrected gravitational field strength measured in axial direction. Uncorrected gravitational field strength measured in transverse direction. Uncorrected gravitational field strength measured in transverse direction, approximately normal to tran1. Uncorrected magnetic field strength measured in axial direction. Uncorrected magnetic field strength measured in transverse direction. Uncorrected magnetic field strength measured in transverse direction, approximately normal to tran1.