According to Wikipedia they used a movable mirror that reflected the light to 12 photo diodes for different wave lengths and then they just scanned the environm

According to Wikipedia they used a movable mirror that reflected the light to 12 photo diodes for different wave lengths and then they just scanned the environment from left to right (or maybe the other way round) with five vertical lines of 512 pixels per second. The 300° panoramas are made out of 9150 (vertical) lines. [1] http://en.wikipedia.org/wiki/Viking_program#Camera.2FImaging_System http://en.wikipedia.org/wiki/Viking_program#Camera.2FImaging...