Surrey Satellite Technology Ltd, or SSTL, is a spin-off company of the University of Surrey, now (July 2012) fully owned by EADS Astrium, that builds and operates small satellites.
Its satellites began as amateur radio satellites known by the UoSAT (University of Surrey SATELLITE) name, or by an OSCAR (Orbital Satellite Carrying Amateur Radio) designation. SSTL cooperates with the University's Surrey Space Centre, which does research into satellite and space topics.
SSTL has moved into remote sensing services with the launch of the Disaster Monitoring Constellation (DMC) and an associated child company, DMC International Imaging. SSTL also adopted the Internet Protocol for the DMC satellites it builds and operates, migrating from use of the AX.25 protocol popular in amateur radio. The CLEO Cisco router in Low Earth Orbit, on board the UK-DMC satellite along with a network of payloads, takes advantage of this adoption of the Internet Protocol. The UK-DMC satellite also carries a payload investigating GPS reflectometry.