[1] The system uses regular 2D cameras in the Space Shuttle bay, on the Canadarm, or on the ISS along with cooperative targets to calculate the 3D position of an object.
[1] Because of the small number of viewing ports on the station and on the shuttle, most of the assembly and maintenance is done using cameras, which do not give stereoscopic vision, and thus do not allow a proper evaluation of depth.
In 1990, development was transferred to Neptec Design Group, a small commercial enterprise located in Kanata, a suburb of Ottawa.
The Photon implementation was optimized to be the most worry free direct manipulation interface possible for the particular needs and work habits of the astronauts.
[3] Training for the system takes place in the simulators located at the agency's headquarters at the John H. Chapman Space Centre near Montreal.