Here is a list of all struct and union fields with links to the structures/unions they belong to:

• a : line_of_response
• b : line_of_response
• i : quaternion
• j : quaternion
• k : quaternion
• phi : polar_vector
• r : cylinder_vector, polar_vector
• s : quaternion
• theta : cylinder_vector, polar_vector
• x : vector
• y : vector
• z : cylinder_vector, vector

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