fulfil its objectives by sending experiments, instruments, or other payloads to the lunar surface. Detailed information was issued as a business opportunity. NASA reports that during the first 3 years the CATALYST partners, working with NASA engineers, have advanced their lander and mission designs through end-to-end mission simulations and subsystems tests, as well as engine hot-fire tests and tethered flight demonstrations. All 3 companies have incorporated NASA's Core Flight System software into their machines. NASA has issued a Request for Proposals for Commercial Lunar Payload Services (CLPS) to deliver payloads to the Moon. NASA several contracts for CLPS services will be awarded during the next decade. Missions to the lunar surface expected to begin in 2019. As well as the small Lunar CATALYST landers, NASA hopes to develop two medium-sized lunar landers under a project called Lunar Surface Transportation Capability. At least one of which has a payload of 1,100 pound (500 kilogram). Companies Astrobotic Technology Astrobotic Technologies of Pittsburgh, Pa. is believed to have bid the payload Griffin Lander. Astrobotics has signed a Space Act Agreement with NASA containing 20 Milestones supporting two demonstration missions, the second of which has enhanced navigation and hazard avoidance performance, ending in July 2017. Astrobotic has developed a preliminary version of its flight software for precision guidance. Testing in simulation validated the Griffin lander's ability to autonomously guide itself to a precise touchdown near the Lacus Mortis pit. an end-to-end mission simulation has been completed. The CDR (Critical Design Review) is expected in June 2016. In December 2016 Astrobotic slipped their estimated launch date to 2019 and separated from the Google Lunar X Prize. In July 2017 Astrobotic announced that it would be sending a Peregrine Lunar Lander with 35 kg of customer payload to the Moon. The spacecraft will be launched on a United Launch Alliance (ULA) launch vehicle in 2019. On September 26, 2017 Astrobotic signed a 2-year extension to its SAA with NASA. the Peregrine Lunar Lander has partially completed Milestone 9: Main engine and Reaction Control System (RCS) hot fire tests. There are 10 milestones to go. In February 2018 Astrobotic estimated that their Peregrine Lunar Lander would be launched on its first mission to the Moon in 2020. On November 29, 2018 Astrobotic was awarded a Commercial Lunar Payload Services contract by NASA, which makes it eligible to bid on delivering science and technology payloads to the Moon