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Description

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). EMIT uses imaging spectroscopy to take mineralogical measurements of the 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 Corrected Spacecraft Attitude and Ephemeris (EMITL1BATT) Version 1 data product provides both corrected and uncorrected attitude quaternions and spacecraft ephemeris data obtained from the ISS, including Earth-centered inertial (ECI) position and velocity, and associated time elements. The data are provided in 1 second intervals, and each product file contains vectors from the duration of the orbit. The time elements are copied from the ISS raw data. The data for each EMITL1BATT granule are delivered in a single Network Common Data Format 4 (netCDF-4) file.

Known Issues

  • Data acquisition gap: From September 13, 2022, through January 6, 2023, a power issue outside of EMIT caused a pause in operations. Due to this shutdown, no data were acquired during that timeframe.

Product Summary

Platforms
ISS
Instruments
EMIT Imaging Spectrometer
Spatial Extent
N: 54 S: -54 E: 180 W: -180
Geographic Region
GLOBAL LAND
Coordinate System
CARTESIAN
Granule Spatial Representation
NO_SPATIAL
Temporal Extent
2022-08-09 to Present
Temporal Resolution
Varies
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC)
Earth Surface Mineral Dust Source Investigation, Jet Propulsion Laboratory, NASA (NASA/JPL/EMIT)
Concept ID
c2408031090-lpcloud
Data State
ACTIVE
Processing Level
1B
Published
Updated

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Green, R. (2023). EMIT L1B Corrected Spacecraft Attitude and Ephemeris V001 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/EMIT/EMITL1BATT.001 Date Accessed: 2025-06-25

Data Center Citation

Robert Green. 2024. EMIT L1B Corrected Spacecraft Attitude and Ephemeris V001. Sioux Falls, South Dakota, USA: NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/EMIT/EMITL1BATT.001.

Documents

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD) The Algorithm Theoretical Basis Document (ATBD) describes the physical and mathematical algorithms for the product.
HOW-TO The LP DAAC GitHub repository provides guides, Python notebooks, and scripts to help users access and work with data from the EMIT mission.
HOW-TO EMIT data E-Learning resources provided by NASA's LP DAAC.
SCIENCE DATA PRODUCT SOFTWARE DOCUMENTATION EMIT Level 1B geolocation science data system repository.
USER'S GUIDE The technical information in the User's Guide enables users to interpret and use the data products.

Learning Resources

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