Combined HSRL and Optical Autocovarience Wind Lidar Demonstration

Metadata Updated: July 17, 2020

Global observations of atmospheric aerosol scattering and extinction profiles are needed to directly support several Decadal survey missions (e.g. ACE, GACM). Precision passive measurements of atmospheric trace gasses and ocean color require calibrated aerosol profile measurements to perform aerosol scattering calibration corrections. While lidar is an ideal instrument to make range resolved aerosol scattering measurements, simple single channel backscatter lidars (e.g. CALIPSO) cannot directly provide the desired calibrated aerosol scattering profiles because the backscatter signal depends on backscatter cross section from each range and the optical depth to the scattering volume. Fortunately, molecular backscatter is Doppler broadened, while aerosol backscatter remains narrow. The High Spectral Resolution Lidar (HSRL) technique spectrally separates molecules and aerosols lidar returns. With known air density, HSRL separately measures extinction and scattering at every range. The best current HSRL method uses an iodine absorption filter to eliminate aerosol scatter from the molecular signal, but is limited to iodine absorption feature wavelengths. The most research-valuable wavelength-dependent aerosol property retrievals require three aerosol backscatter wavelength and two extinction wavelength profiles spanning the UV to NIR. Ball has developed the theory for extraction of HSRL data products from a multi-wavelength Optical Autocovariance Wind Lidar (OAWL) instrument simultaneously with Doppler wind lidar measurements. Ground-based Doppler wind lidar measurements from OAWL have successful been demonstrated under a NASA IIP award which will also perform an airborne demonstration. We propose to leverage the OAWL IIP hardware by augmenting the hardware, and developing the control, acquisition, and processing software to simultaneously demonstrate a multi-wavelength HOAWL implementing an integrated 2alpha+2beta+2delta system, exiting at TRL 4 with a ground-validated HOAWL demonstration. An instrument capable of both wind and HSRL measurements would provide an opportunity to combine the lidar portion of the ACE mission with the 3D-Winds mission, resulting in major cost savings to NASA.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_10472
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 49c79687-62e1-42ae-b13e-a22d5bce05b5
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2015-07-01
Homepage URL
Data Last Modified 2020-01-29
Program Code 026:027
Source Datajson Identifier True
Source Hash 7fcf9636da7f98ac56c381b9bd6580ca4fd7e3d0
Source Schema Version 1.1

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