Special Onboard Computers

Inside a satellite the central OBC is usually not the only computer. Besides computers in instruments there are typical AOCS equipment components which include considerable computational power. The most obvious components are navigation receivers for GPS, Galileo and / or GLONASS. Another class of equipment requiring significant CPU performance are star trackers. Modern star trackers are equipped with their own ERC32 or even LEON processor for fast star map identification and quaternion computation. These units however are very specific electronic equipment.