Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • ATom: Nucleation Mode Aerosol Size Spectrometer Calibration and Performance Data

    Metadata Updated: December 6, 2023

    This dataset provides extensive calibration and in-flight performance data for two nucleation mode aerosol size spectrometer (NMASS) instruments utilized in the NASA Atmospheric Tomography Mission (ATom). Each NMASS has five condensation particle counters (CPCs) that detect particles above a different minimum size, determined by the maximum vapor supersaturation encountered by the particles. Operated in parallel, the CPCs provide continuous concentrations of particles in different cumulative size classes between 3 and 60 nm. Knowing the response function of each CPC, numerical inversion techniques were applied to recover size distributions from the continuous concentrations. Data provided include: NMASS counting efficiencies and diameters of calibration aerosols, inverted particle size distributions; comparisons of NMASS and Scanning Mobility Particle Sizer (SMPS) results; and performance at flows, temperatures, and pressures measured by both NMASSs and comparison with Ultra-High Sensitivity Aerosol Spectrometer (UHSAS) concentrations collected on board the NASA DC-8 aircraft during an ATom flight in February 2017.

    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

    Schematic of the NMASS layout and flow system (Williamson et al., 2018).

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 30, 2023
    Metadata Updated Date December 6, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2675810947-ORNL_CLOUD
    Data First Published 2018-11-01
    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 Williamson, C.J., A. Kupc, J.C. Wilson, D.W. Gesler, J.M. Reeves, F. Erdesz, R.J. Mclaughlin, and C.A. Brock. 2018. ATom: Nucleation Mode Aerosol Size Spectrometer Calibration and Performance Data. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1607
    Graphic Preview Description Schematic of the NMASS layout and flow system (Williamson et al., 2018).
    Graphic Preview File https://daac.ornl.gov/ATOM/guides/ATom_NMASS_Data_Fig1.png
    Harvest Object Id 00032406-9934-43e5-9368-709e00e0e160
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1607
    Metadata Type geospatial
    Old Spatial -180.0 -65.33 180.0 80.52
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 908d3c28d7c93a41f67e69e896f329c1ece58ffe8f21e1cecc8cf8bd650e46a8
    Source Schema Version 1.1
    Spatial
    Temporal 2016-10-15T00:00:00Z/2018-01-20T23:59:59Z

    Didn't find what you're looking for? Suggest a dataset here.