The omega, phi, kappa angles are defined as the angles used in order to rotate the (X,Y,Z) geodetic coordinate system and align it with the image coordinate system.

**Omega**(ω) is the rotation around the Χ-axis.**Phi**(φ) is the rotation around the Y-axis.**Kappa**(κ) is the rotation around the Z-axis.

Rotation around the X-axis (omega) | Rotation around the Y-axis (phi) | Rotation around the Z-axis (kappa) |

Figure 1. Exterior orientation rotations/angles. |

The omega, phi, kappa are in **degrees** and can be positive or negative. This means, for example, that the value 350 degrees can be expressed also as -10 [0-(360-350)] degrees.