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    • ACT-America: HALO Lidar Measurements of AOP and ML Heights, 2019

    Metadata Updated: December 6, 2023

    This dataset provides measurements from the High Altitude Lidar Observatory (HALO) instrument, an airborne multi-function Differential Absorption Lidar (DIAL) and High Spectral Resolution Lidar (HSRL), operating at 532 nm and 1064 nm wavelengths onboard a C-130 aircraft during the June and July 2019 ACT-America campaign. The flights took place over eastern and central North America based from Shreveport, Louisiana; Lincoln, Nebraska; and NASA Wallops Flight Facility located on the eastern shore of Virginia. HALO data were sampled at 0.5 s temporal and 1.25 m vertical resolutions. The data include profiles of aerosol optical properties (AOP), distributions of mixed layer heights (MLH), columns of tropospheric methane, and navigation parameters. The data are provided in HDF5 format along with PNG images and a companion files in Portable Document (*.pdf) format.

    Access & Use Information

    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.

    Downloads & Resources

    Dates

    Metadata Created Date June 27, 2023
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Map of mixing layer height across the sampling area. Source: 20190617_MixedLayerHeight_map.png

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date June 27, 2023
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2704996986-ORNL_CLOUD
    Data First Published 2022-12-29
    Language en-US
    Data Last Modified 2023-06-12
    Category ACT-America, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation Nehrir, A.R., J.E. Collins, S.A. Kooi, and R.A. Barton-Grimley. 2022. ACT-America: HALO Lidar Measurements of AOP and ML Heights, 2019. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1833
    Graphic Preview Description Map of mixing layer height across the sampling area. Source: 20190617_MixedLayerHeight_map.png
    Graphic Preview File https://daac.ornl.gov/ACTAMERICA/guides/HALO_LiDAR_AOP_ML_Heights_Fig1.png
    Harvest Object Id a5ffd3f4-c8f4-443a-aa19-77aa09d10048
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1833
    Metadata Type geospatial
    Old Spatial -102.0 28.0 -73.0 50.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 4891ffab8b99d63291e43d4bbd5ef77eaff2d38c0bbc4d45260c9ad206368135
    Source Schema Version 1.1
    Spatial
    Temporal 2019-06-17T00:00:00Z/2019-07-28T23:59:59Z

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