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Accession Number
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N20120003334
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Title
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Doppler Lidar Sensor for Precision Landing on the Moon and Mars.
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Publication Date
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Mar 2012
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Media Count
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7p
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Personal Author
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B. Barnes D. Pierrottet F. Amzajerdian G. Hines G. Lockhard L. Petway
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Abstract
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Landing mission concepts that are being developed for exploration of planetary bodies are increasingly ambitious in their implementations and objectives. Most of these missions require accurate position and velocity data during their descent phase in order to ensure safe soft landing at the pre-designated sites. To address this need, a Doppler lidar is being developed by NASA under the Autonomous Landing and Hazard Avoidance (ALHAT) project. This lidar sensor is a versatile instrument capable of providing precision velocity vectors, vehicle ground relative altitude, and attitude. The capabilities of this advanced technology have been demonstrated through two helicopter flight test campaigns conducted over a vegetation-free terrain in 2008 and 2010. Presently, a prototype version of this sensor is being assembled for integration into a rocket-powered terrestrial free-flyer vehicle. Operating in a closed loop with vehicle's guidance and navigation system, the viability of this advanced sensor for future landing missions will be demonstrated through a series of flight tests in 2012.
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Keywords
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Attitude(Inclination)
Doppler radar
Field-programmable gate arrays
Flight tests
Inertial platforms
Line of sight
Mars landing
Moon
Optical radar
Prototypes
Sensors
Signal processing
Waveforms
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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54 - Astronomy & Astrophysics
84B - Extraterrestial Exploration
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Corporate Author
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National Aeronautics and Space Administration, Hampton, VA. Langley Research Center.
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Document Type
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Conference proceedings
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Title Note
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N/A
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NTIS Issue Number
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1219
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Contract Number
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N/A
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