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Turbulence and mountain wave conditions observed with an airborne 2-micron lidarJoint efforts by the National Aeronautics and Space Administration (NASA), the Department of Defense, and industry partners are enhancing the capability of airborne wind and turbulence detection. The Airborne Coherent Lidar for Advanced In-Flight Measurements (ACLAIM) was flown on three series of flights to assess its capability over a range of altitudes, air mass conditions, and gust phenomena. This paper describes the observation of mountain waves and turbulence induced by mountain waves over the Tehachapi and Sierra Nevada mountain ranges (California, USA) by lidar onboard the NASA Airborne Science DC-8 airplane. The examples in this paper compare lidar-predicted mountain waves and wave-induced turbulence to subsequent aircraft-measured true airspeed. Airplane acceleration data is presented describing the effects of the wave-induced turbulence on the DC-8 airplane. Highlights of the lidar-predicted airspeed from the two flights show increases of 12 meters per second (m/s) at the mountain wave interface and peak-to-peak airspeed changes of 10 m/s and 15 m/s in a span of 12 seconds in moderate turbulence.
Document ID
Document Type
Conference Paper
Teets, Edward H., Jr. (NASA Dryden Flight Research Center Edwards, CA, United States)
Ashburn, Chris (AS and M, Inc. Edwards AFB, CA, United States)
Ehernberger, Jack (NASA Dryden Flight Research Center Edwards, CA, United States)
Bogue, Rodney (NASA Dryden Flight Research Center Edwards, CA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Avionics and Aircraft Instrumentation
Meeting Information
SPIE Remote Sensing, Lidar Technologies and Measurement for Atmospheric Remote Sensing II(Stockholm)
Distribution Limits
Public Use Permitted.

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NameType 20060048562.pdf STI