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    • ATom: Measurements from the Quantum Cascade Laser System (QCLS), Version 2

    Metadata Updated: December 6, 2023

    This dataset provides atmospheric concentrations of CO2, CH4, CO, and N2O measured by the Harvard Quantum Cascade Laser System (QCLS) instruments during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. The QCLS (DUAL and CO2) instrument package contains two separate optical assemblies and calibration systems, and a common data system and power supply. The QCLS DUAL instrument simultaneously measures CO, CH4, and N2O concentrations, in situ, using two thermoelectrically cooled pulsed-quantum cascade lasers light sources, a multiple pass absorption cell, and two liquid nitrogen-cooled solid-state detectors. The QCLS CO2 instrument measures CO2 concentrations in situ using a thermoelectrically cooled pulsed-quantum cascade laser light source, gas cells, and liquid nitrogen cooled solid-state detectors. The CO2 mixing ratio of air flowing through the sample gas cell is determined by measuring absorption from a single infrared transition line at 4.32 microns relative to a reference gas of known concentration.

    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 May 30, 2023
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    The Harvard QCLS (DUAL and CO2) instrument package contains two optical assemblies and calibration systems and a common data system and power supply.

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 30, 2023
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2677114811-ORNL_CLOUD
    Data First Published 2022-01-03
    Language en-US
    Data Last Modified 2023-06-12
    Category ATom, 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 Commane, R., J.W. Budney, Y. Gonzalez ramos, M. Sargent, S.C. Wofsy, and B.C. Daube. 2021. ATom: Measurements from the Quantum Cascade Laser System (QCLS), Version 2. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1932
    Graphic Preview Description The Harvard QCLS (DUAL and CO2) instrument package contains two optical assemblies and calibration systems and a common data system and power supply.
    Graphic Preview File https://daac.ornl.gov/ATOM/guides/ATom_QCLS_Instrument_Data_V2_Fig1.png
    Harvest Object Id 4f91b603-6f38-484b-9c48-bc95dc86edeb
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1932
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 42171994039d511a31c6ff02a864034330ff71a67eb58af175bac2edd6df3da7
    Source Schema Version 1.1
    Spatial
    Temporal 2016-07-29T00:00:00Z/2018-05-21T23:59:59Z

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