The horizontal line represents the CCD-line of the HRSC camera. The flight direction is perpendicular to this line. An area represents the SRC image. It consists of 1024 X 1032 pixels. One pixel of the HRSC at 250 km altitude covers 10 m on the ground. Thus the width of an image on the Martian surface is 51.84 km (HSRC).
The SRC images are created by an area sensor. At an altitude of 250 km one pixel corresponds to about 2.3 metres on the ground. At each read-out a complete
picture with the dimensions of 2355 m X 2373 m (1024 X 1032 pixels with a resolution of 2.3 meters) is created. To create a continuous image-strip mosaic it is necessary to take one
SRC-image every 235 read-out steps of the HRSC. This is realised via the control software and the Digital Unit.