Cassini Magnetometer data are taken from the PDS (Planetary Data System),
site.
Available coordinates :
RTN : R (radial component, Sun to the spacecraft), T (tangential component, parallel to the Solar Equatorial plane and perpendicular to R), and N (normal component, completes right handed set)
KSM : X (Saturn to Sun), Z (X-Z plane contains Saturn's centered magnetic dipole axis, M), and Y (completes right handed set)
KSO : X (Saturn to Sun), Z (parallel to Saturn's orbital plane upward normal), and Y (completes the right handed set)
KRTP : R (Saturn to spacecraft), Phi (parallel to Saturn's equator), and Theta (completes right handed set)