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    • EMIT L1B At-Sensor Calibrated Radiance and Geolocation Data 60 m V001

    Metadata Updated: July 16, 2024

    The Earth Surface Mineral Dust Source Investigation (EMIT) instrument measures surface mineralogy, targeting the Earth’s arid dust source regions. EMIT is installed on the International Space Station (ISS) and uses imaging spectroscopy to take mineralogical measurements of sunlit regions of interest between 52° N latitude and 52° S latitude. An interactive map showing the regions being investigated, current and forecasted data coverage, and additional data resources can be found on the VSWIR Imaging Spectroscopy Interface for Open Science (VISIONS) EMIT Open Data Portal.

    The EMIT Level 1B At-Sensor Calibrated Radiance and Geolocation (EMITL1BRAD) Version 1 data product provides at-sensor calibrated radiance values along with observation data in a spatially raw, non-orthocorrected format. Each EMITL1BRAD granule consists of two Network Common Data Format Version 4 (netCDF-4) files at a spatial resolution of 60 meters (m): Radiance (EMIT_L1B_RAD) and Observation (EMIT_L1B_OBS). The Radiance file contains the at-sensor radiance measurements of 285 bands with a spectral range of 381-2493 nanometers (nm) and with a spectral resolution of ~7.5 nm, which are held within a single science dataset layer (SDS). The Observation file contains viewing and solar geometries, timing, topographic, and other information related to the observation.

    Each NetCDF4 file holds a location group containing geometric lookup tables (GLT), which are orthorectified images that provide relative x and y reference locations from the raw scene to allow for projection of the data. Along with the GLT layers, the files also contain latitude, longitude, and elevation layers. The latitude and longitude coordinates are presented using the World Geodetic System (WGS84) ellipsoid. The elevation data was obtained from Shuttle Radar Topography Mission v3 (SRTM v3) data and resampled to EMIT’s spatial resolution.

    Each granule is approximately 75 kilometer (km) by 75 km, nominal at the equator, and some granules near the end of an orbit segment reaching 150 km in length.

    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 July 16, 2024

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Browse image for Earthdata Search.

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 30, 2023
    Metadata Updated Date July 16, 2024
    Publisher LP DAAC
    Maintainer
    Identifier C2408009906-LPCLOUD
    Data First Published 2022-11-22
    Language en-US
    Data Last Modified 2024-07-05
    Category EMIT, 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 Robert Green. 2022-11-22. EMITL1BRAD.001. EMIT L1B At-Sensor Calibrated Radiance and Geolocation Data 60 m V001. Archived by National Aeronautics and Space Administration, U.S. Government, NASA EOSDIS Land Processes DAAC. https://doi.org/10.5067/EMIT/EMITL1BRAD.001. https://doi.org/10.5067/EMIT/EMITL1BRAD.001. The DOI landing page provides citations in APA and Chicago styles..
    Creator Robert Green
    Graphic Preview Description Browse image for Earthdata Search.
    Graphic Preview File https://cmr.earthdata.nasa.gov/browse-scaler/browse_images/granules/G2594279260-LPCLOUD?h=500&w=500
    Harvest Object Id ce6dbbaa-d4d2-4faf-b2df-27546ad619d1
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/EMIT/EMITL1BRAD.001
    Metadata Type geospatial
    Old Spatial -180.0 -54.0 180.0 54.0
    Program Code 026:001
    Series Name EMITL1BRAD.001
    Source Datajson Identifier True
    Source Hash 4c4827c63657c28fb3f898b80c180e12a23bd2aa04493feb8842123e7d8e8905
    Source Schema Version 1.1
    Spatial
    Temporal 2022-08-09T00:00:00Z/2024-07-15T00:00:00Z

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