An all fiber Navigation Doppler Lidar (NDL) system is under development at NASA Langley Research Center (LaRC) for precision descent and landing applications on planetary bodies. The sensor produces high-resolution line of sight range, altitude above ground, ground relative attitude, and high precision velocity vector measurements. Previous helicopter flight test results demonstrated the NDL measurement concepts, including measurement precision, accuracies, and operational range. This paper discusses the results obtained from a recent campaign to test the improved sensor hardware, and various signal processing algorithms applicable to real-time processing. The NDL was mounted in an instrumentation pod aboard an Erickson Air-Crane helicopter and flown over various terrains. The sensor was one of several sensors tested in this field test by NASA's Autonomous Landing and Hazard Avoidance Technology (ALHAT) project.


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    Title :

    Navigation Doppler lidar sensor for precision altitude and vector velocity measurements: flight test results


    Contributors:

    Conference:

    Sensors and Systems for Space Applications IV ; 2011 ; Orlando,Florida,United States


    Published in:

    Publication date :

    2011-05-10





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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