ALHAT Updates


Today, the Morpheus Lander, with the ALHAT system integrated with it, performed a tether test. At 00:42, the Hazard Detection System, or HDS, which is located on the upper left-hand side of Morpheus, pitches over to begin its mosaic scan. The HDS uses a flash lidar sensor to scan a roughly 100 by 100 meter, or about 4 football fields, of the local terrain for a safe landing area, by taking dozens of 3D images. The Hazard Detection System then stitches those images together into a mosaic and generate a digital elevation map, or DEM, with a 10-cm resolution of the landing area. The digital elevation map is used to determine possible safe landing locations for the Morpheus vehicle.


Between January and March of this year, the ALHAT team went to Langley Research Center (LaRC) to test the newly integrated Autonomous Landing And Hazard Avoidance Technology (ALHAT) system. To prove that the varied technologies going into ALHAT are ready for flight, they must be tested together. Especially important are tests of hardware-in-the-loop here on the ground. Today, Johnson Space Center, where ALHAT is managed in cooperation with Jet Propulsion Laboratory, Langley Research Center (LaRC), the Charles Stark Draper Labs (CSDL) and the Applied Physics Laboratory (APL), released this video of the LaRC work to bring ALHAT from simulator to reality.


Artist's illustration of the EFT-1 Orion Multi-Purpose Crew Vehicle (MPVC) on orbit. The mission is expected to take place atop a Delta-IV Heavy rocket in 2014. Image Credit: NASA

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