Figure 2a.
Figure 2a.
The camera on board the orbiter moves across the planet, scanning the surface line by line. A very similar principle is used in every fax machine; rollers transport a sheet of paper through the device, scanning each line. The only difference with the HRSC operating principle is that the camera (which represents the fax machine in this analogy) itself moves, and not the surface (the sheet of paper) (Figure 2a).
