Altair is a high altitude, long endurance unmanned aerial system.

The Altair demonstration project (2005) included the NOAA Earth System Research Laboratory, NOAA Ocean Service, NASA's Dryden Flight Research Center, and General Atomics Aeronautical Systems, Inc. Altair is a high-altitude, long-endurance unmanned aerial system built initially to support NASA's Earth science research needs. Altair has a wingspan of 86 feet; payload of 660 pounds of sensors/equipment; and flies at 52,000 feet for more than 30 hours.