The Spaceborne Scanning Lidar System (SSLS) system is a space qualified scanning lidar system developed by MDA, Space Missions (MD Robotics) and Optech. It is scheduled to be launched in 2005 as part of a one year on-orbit demonstration of space technologies associated with spacecraft autonomous rendezvous and proximity operations. The SSLS was designed to meet specific performance requirements under all lighting conditions during its one-year mission. Prior to delivery to the customer, the SSLS completed a successful proto-flight testing program that demonstrated SSLS capability to perform its intended mission in its target space environment. The SSLS is a product of a successful fusion of proven terrestrial lidar technologies with space proven hardware and software designs. The SSLS product was developed, qualified and delivered to a customer within an extremely demanding schedule. This paper describes the requirements, design constraints and architecture of the SSLS. The paper includes scan results which demonstrate its performance and capabilities at short and long ranges.