NASA selects astrobotic to demonstrate asteroid and moon landing technology

Apr 05, 2013
The first flight test of Astrobotic's landing sensor was completed on an unmanned helicopter operated by a pilot on the ground. Credit: Astrobotic

Last week Astrobotic successfully flew a sensor package designed to guide spacecraft safely to the surface of asteroids, moons, planets, and beyond. The flight occurred on an unmanned helicopter operated by a pilot on the ground. The flights are preparation for demonstration of this capability on a propulsive lander similar to Astrobotic's Griffin. Astrobotic was selected by NASA for flight opportunities on a propulsive lander which culminate in a fully autonomous landing demonstration with hazard detection, trajectory planning, and closed-loop control.

"This flight opportunity represents a major milestone not just for us, but for spacecraft in general. We'll be the first to demonstrate a GPS-denied propulsive landing from that can re-plan its route after discovering its targeted landing area is unsafe to land," said Kevin Peterson, Director of Guidance, Navigation, and Control for Astrobotic.

The helicopter flight is one of a series of flights to occur over the next few months. These flights will verify performance of the underlying hardware and software. When the software has reached stability with predictable performance, it will be tasked to land the helicopter by itself—without GPS. Astrobotic's landing sensor uses two cameras, an inertial measurement unit, and a scanning laser.

NASA has awarded Astrobotic a flight opportunity on the Masten Xaero launch vehicle to demonstrate asteroid and moon landing technology. Credit: Astrobotic

"The pair of cameras work together like to measure distance and track motion. The scanning laser gives precise distance measurements and enables us to pick out hazards as small as a curb. The sensor combines these sensors with an inertial measurement unit—the device that enables smartphones to switch from landscape to portrait mode— to build its models," Peterson explained.

The program will exhibit terrain relative navigation, which enables precise landing on without GPS. The spacecraft will autonomously compare imagery captured from cameras with maps from to determine its location. This technology will revolutionize access to planetary surfaces through a 100-fold increase in the accuracy of planetary landings.

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Steven_Anderson
1.8 / 5 (5) Apr 05, 2013
Is it me or did someone forget that asteroids don't have atmospheres so using a helicopter instead of a thruster system might negatively influence the design of the navigation system? http://rawcell.com
Ophelia
5 / 5 (2) Apr 06, 2013
It is you. They are doing hardware/software validation tests. It is a bit cheaper to use a helicopter than a rocket for that, don't you think? Once it is known that the hardware/software works using few dozen $500 helicopter rides (or whatever they cost), they can move up to rocket rides that cost considerably more.

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