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

Metadata Updated: June 4, 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.

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Metadata Created Date May 30, 2023
Metadata Updated Date June 4, 2024

Metadata Source

Harvested from NASA Data.json

Graphic Preview

Browse image for Earthdata Search.

Additional Metadata

Resource Type Dataset
Metadata Created Date May 30, 2023
Metadata Updated Date June 4, 2024
Publisher LP DAAC
Identifier C2408009906-LPCLOUD
Data First Published 2022-11-22
Language en-US
Data Last Modified 2024-05-30
Category EMIT, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
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. 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
Harvest Object Id b4e787a9-5fbf-4411-9e38-14b01db35b28
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
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 ae8e1d358778432d20f4ad10436860631c1eb13df5c13dbcfc63a599b02e53a7
Source Schema Version 1.1
Temporal 2022-08-09T00:00:00Z/2024-06-03T00:00:00Z

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