Chief Ray

Photogrammetric and Mapping Software

General Vector Operations

• Vector addition, subtraction, scaling

•  Dot product and cross product

• Vector norm and normalization

•  Inputs and output vectors can be either horizontal or vertical ranges

General Quaternion Operations and 3D Rotations

• Rotation matrix ↔ quaternion conversion

• Euler angles ↔ quaternion conversion

• Quaternion multiplication (q=q₁q₂)

• Vector rotation by a quaternion (v=qvq*)

Atmospheric refraction and velocity aberration

• General atmospheric refraction correction model that uses atmospheric temperature and pressure, if available

• Full relativistic velocity aberration corrections (“aberration of light”)

Ray Intersections

• Ray-Ray intersection yields the midpoint and the minimum distance between two rays

• Ray-Surface intersection for any ellipsoid of revolution (default WGS 84)

For more information, contact Chief Ray .

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