What are the meanings of phi, omega and kappa in flight attitude, and what are their relations with pitch, roll and yaw?

Phi, omega and kappa are English pronunciations of Greek letters φ, ω and κ; Pitch, roll and yaw mean pitch, roll and yaw in English.

In photogrammetry, the meanings of three external orientation elements in pos data obtained by field flight are as follows:

Pitch (pitch angle), rotating around the X axis, corresponding to the angle element ω.

Roll (roll angle), rotating around the Y axis, corresponding to the angle element φ.

Yaw (yaw angle), rotating around the Z axis, corresponding to the angle element κ.

As shown in the figure, in the ground auxiliary coordinate system, the heading deflection angle φ, lateral deflection angle ω and photo rotation angle κ with the X axis as the heading, or the heading deflection angle φ', lateral deflection angle ω' and photo rotation angle κ' with the Y axis as the heading.