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A Long Distance Laser Altimeter for Terrain Relative Navigation and Spacecraft LandingA high precision laser altimeter was developed under the Autonomous Landing and Hazard Avoidance (ALHAT) project at NASA Langley Research Center. The laser altimeter provides slant-path range measurements from operational ranges exceeding 30 km that will be used to support surface-relative state estimation and navigation during planetary descent and precision landing. The altimeter uses an advanced time-of-arrival receiver, which produces multiple signal-return range measurements from tens of kilometers with 5 cm precision. The transmitter is eye-safe, simplifying operations and testing on earth. The prototype is fully autonomous, and able to withstand the thermal and mechanical stresses experienced during test flights conducted aboard helicopters, fixed-wing aircraft, and Morpheus, a terrestrial rocket-powered vehicle developed by NASA Johnson Space Center. This paper provides an overview of the sensor and presents results obtained during recent field experiments including a helicopter flight test conducted in December 2012 and Morpheus flight tests conducted during March of 2014.
Document ID
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Pierrottet, Diego F.
(Coherent Applications, Inc. Hampton, VA, United States)
Amzajerdian, Farzin
(NASA Langley Research Center Hampton, VA, United States)
Barnes, Bruce W.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
May 28, 2014
Publication Date
May 5, 2014
Subject Category
Lasers And Masers
Report/Patent Number
Meeting Information
Meeting: SPIE (DSS 2014 ) Defense and Security Symposium
Location: Baltimore, MD
Country: United States
Start Date: May 5, 2014
End Date: May 9, 2014
Sponsors: International Society for Optical Engineering
Funding Number(s)
WBS: WBS 079749.01.04
Distribution Limits
Public Use Permitted.
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