Imaging · collection · 2025
EMIT L3 Aggregated Mineral Spectral Abundance and Uncertainty 0.5 Deg V002
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/emit/emitl3asa.002
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) and uses imaging spectroscopy to take 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 3 Aggregated Mineral Spectral Abundance and Uncertainty (EMITL3ASA) Version 2 data product provides an aggregated mineral spectral abundance of the 10 minerals that are the focus of the EMIT mission. These minerals, referred to as the EMIT-10 minerals, are calcite, chlorite, dolomite, goethite, gypsum, hematite, illite+muscovite, kaolinite, montmorillonite, and vermiculite. The EMITL3ASA granule consists of one Network Common Data Format 4 (netCDF-4) file at a spatial resolution of 0.5 degrees.
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The data in EMITL3ASA relies heavily on the EMIT L2B Estimated Mineral Identification and Band Depth and Uncertainty (EMITL2BMIN) data. Using the EMITL2BMIN data, aggregated spectral abundance (ASA) and uncertainty is calculated within each 0.5 degree grid cell in the EMITL3ASA product for each of the EMIT-10 minerals. Grainsize was determined to be the strongest contributor to abundance variation, and as such layers calculated using the 2.5 and 97.5 percentile confidence interval of the grainsize are provided for use in uncertainty quantification.
The EMITL3ASA data product contains 30 Science Dataset (SDS) layers. There are three layers for each of the EMIT-10 minerals: one layer containing mineral spectral abundance and two layers for uncertainty quantification containing mineral spectral abundance at 2.5 and 97.5 percentile confidence intervals of grainsize. The latitude and longitude layers contain the coordinates for the upper left corner of each pixel.
Known Issues
* Minor Abundance Estimate Discrepancy. A transcription error in the grain-size median prediction caused a minor discrepancy in the EMITL3ASA Version 2 mineral spectral abundance estimates. The issue caused deviations well within the uncertainty estimates, typically far below 1%.
The most affected estimate is calcite, with maximum deviations reaching 2% for a very small number of pixels. Iron oxides are virtually unaffected.
Links
Get the data
- Resource doi.org/10.5067/emit/emitl3asa.002 ↗
The LP DAAC product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc.
landing page · download · DOI / persistent id · from NASA CMR, data nasa gov
- PDF lpdaac.usgs.gov/documents/2262/EMITL3ASA_User_Guide_V2.pdf ↗
The technical information in the User's Guide enables users to interpret and use the data products.
documentation · download · from NASA CMR, data nasa gov
- EMIT Level 3 science data system repository. github.com/emit-sds/emit-sds-l3 ↗
documentation · download · from NASA CMR, data nasa gov
- PDF lpdaac.usgs.gov/documents/2259/EMIT_L3_ATBD_V3.pdf ↗
The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
documentation · download · from NASA CMR, data nasa gov
- Resource earthdata.nasa.gov/centers/lp-daac/learn?populate=EMIT&items_per_page=8 ↗
EMIT data E-Learning resources provided by NASA's LP DAAC.
documentation · download · from NASA CMR, data nasa gov
- Resource github.com/nasa/EMIT-Data-Resources ↗
The LP DAAC GitHub repository provides guides, Python notebooks, and scripts to help users access and work with data from the EMIT mission.
documentation · download · from NASA CMR, data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C3147269019-LPCLOUD.iso19115 ↗
download · from data nasa gov
- search.earthdata.nasa.gov /search/granules?p=C3147269019-LPCLOUD ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- PNG data.lpdaac.earthdatacloud.nasa.gov/lp-prod-public/EMITL3ASA.002/EMIT_L3_ASA_002/EMIT_L3_ASA_002.p… ↗
download · preview image · from data nasa gov, NASA CMR
- Resource earth.jpl.nasa.gov/emit ↗
The EMIT website provides detailed information on the EMIT mission, instrument, science, applications, and data.
download · project · from data nasa gov, NASA CMR
- Resource earthdata.nasa.gov/centers/lp-daac ↗
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
download · project · from data nasa gov, NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/emit-l3-aggregated-mineral-spectral-abundance-and-unce… ↗
landing page · from data nasa gov
Catalogue records · 3
- CKAN API data.nasa.gov/api/3/action/package_show?id=6a3733c2-59ff-4df6-ba8d-d7ce9803a… ↗
metadata API · from data nasa gov
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C3147269019-LPCLOUD.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C3147269019-LPCLOUD.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Earth Surface Mineral Dust Source Investigation (EMIT) Imaging Spectrometer · International Space Station · Soil Chemistry
- From keywords
- Astronomy & Astrophysics · Chemistry · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
- Inferred from text
- Imaging 75%
Provenance · 2 source records, 19 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C3147269019-LPCLOUD | 15 d ago | JSON v1 |
| NASA Data Portal | 6a3733c2-59ff-4df6-ba8d-d7ce9803a199 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:chemistry | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:physics | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[instrument].gcmd_instrument:emit-imaging-spectrometer | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/land-surface/soils/soil-chemistry | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:imaging | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[platform].gcmd_platform:iss | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |