High Resolution Stereo Camera
High Resolution Stereo Camera (HRSC) is a camera experiment on Mars Express. A version for Earth called HRSC-AX was also developed, as was a version for Mars 96. It has four main parts: camera head, super resolution channel, instrument frame, and digital unit. At an altitude of 250 km from Mars SRC can produce 2.3 meters/pixel images, of 2.35 km square Mars terrain. It has 9 other channels and can produce digital terrain models.
By 2012 about 61.5% of the surface of Mars was mapped at a resolution of at least 20 meters per pixel by the Mars Express mission using this camera.