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- [Text Source: http://airbornescience.nasa.gov/instrument/DAWN ]
DAWN (Doppler Aerosol WiNd lidar) is a pulsed laser, 2-micron, and solid-state. It pulses at 10 Hertz with 250 mJ pulses that are 200 ns long full width at half maximum (FWHM). Using the wedge scanner, five different azimuth angles are measured: 1) to end up with five equations for the three unknown components of wind vs. altitude, 2) to mitigate cloud obscurations, and 3) to measure the atmospheric variability.
DAWN can provide vertical profiles of u, v, and w components of 3-D wind in the region below the aircraft. Various vertical and horizontal resolutions are possible. DAWN can also provide vertical profiles of line of sight (LOS) wind for the five (5) azimuth angles; vertical profiles of relative aerosol backscatter in the region below the aircraft, for the five (5) azimuth angles; vertical profiles of wind turbulence in the region below the aircraft, for the five (5) azimuth angles; and correlations of the data products vs. height.
Instrument Type: Lidar
Measurements: Wind, Aerosol Backscattering
Aircraft: DC-8
Instrument Team: Michael J. Kavaya (PI)
Missions: GRIP (DC-8)
Group: Instrument_Details
Entry_ID: DAWN
Group: Instrument_Identification
Instrument_Category: Earth Remote Sensing Instruments
Instrument_Class: Active Remote Sensing
Instrument_Type: Profilers/Sounders
Instrument_Subtype: Lidar/Laser Sounders
Short_Name: DAWN
Long_Name: Doppler Aerosol WiNd Lidar
End_Group
Group: Associated_Platforms
Short_Name: NASA DC-8
End_Group
Online_Resource: http://airbornescience.nasa.gov/instrument/DAWN
Creation_Date: 2012-05-01
Group: Instrument_Logistics
Instrument_Owner: USA/NASA
End_Group
End_Group
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