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Wind Lidars for Aero-Assisted Entry, Descent, and Landing on Mars

Clark, Ivan and Bollt, Scott and Krier, William (2021) Wind Lidars for Aero-Assisted Entry, Descent, and Landing on Mars. In: AIAA Scitech 2021 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2021-1505. ISBN 9781624106095.

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NASA seeks to safely and consistently deliver 20 metric tons of payload to within 50m of the intended location on Mars. A study has been conducted to evaluate the utility of wind lidars to aid in aero-assisted entry, descent, and precision landing of vehicles carrying these payloads. Numerical simulation found that coherent-Doppler, infrared, aerosol-backscatter wind lidars on the Martian surface can measure winds nominally over a 15km radius hemisphere using eye-safe laser energies and optical apertures similar to those commercially available for terrestrial airport support. Such ground-based wind measurements around the target delivery site are useful for determining when to initiate atmospheric entry. Initial analyses of direct-Doppler, ultraviolet, molecular-backscatter wind lidars demonstrate forward-looking measurement of wind speed, atmospheric temperature, atmospheric density, and vehicle flight attitude beyond the vehicle boundary layer. These measurements would enable controlled flight of an aero-assisted cargo vehicle to the designated landing site.

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Additional Information:This material is declared a work of the U.S. Government and is not subject to copyright protection in the United States.
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AIAA Paper2021-1505
Record Number:CaltechAUTHORS:20210112-105611474
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Official Citation:Ivan Clark, Scott Bollt and William Krier. Wind Lidars for Aero-Assisted Entry, Descent, and Landing on Mars. AIAA Scitech 2021 Forum. AIAA 2021-1505. January 2021; DOI: 10.2514/6.2021-1505
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107426
Deposited By: George Porter
Deposited On:13 Jan 2021 16:17
Last Modified:16 Nov 2021 19:02

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