Optical metrology system

An spacecraft antenna dynamic compensation system comprising:

• an antenna attached to a structure of the spacecraft;
• a plurality of targets attached to the antenna;
• a dynamic mode control system comprising:
• a plurality of optical metrology sensor assemblies attached to the structure of the spacecraft, each optical metrology sensor assembly comprising:
• a light source for illuminating a target;
• a ranging device receiving reflected light from the target and facilitating the determination of a distance to the target;
• a two-dimensional position sensor receiving reflected light from the target and facilitating a determination of a two dimension position of the target;
• and
• a control system receiving signals from the optical metrology sensors and controlling movement of the antenna in response to the signals.

A method for performing optical metrology, the method comprising:

• illuminating a target;
• using reflected light from the target and using a reference to facilitate the determination of a distance to the target;
• and
• using reflected light from the target incident upon a two-dimensional position sensor to facilitate a determination of a two dimension position of the target.